2021/07/15 更新

写真a

ツチカワ サトル
土川 覚
TSUCHIKAWA, Satoru
所属
大学院生命農学研究科 森林・環境資源科学専攻 森林・環境資源科学 教授
大学院担当
大学院生命農学研究科
学部担当
農学部
職名
教授
連絡先
メールアドレス

学位 2

  1. 農学修士 ( 1998年3月   名古屋大学 ) 

  2. 博士(農学) ( 1998年3月   名古屋大学 ) 

研究分野 3

  1. その他 / その他  / 農業情報工学

  2. その他 / その他  / 応用光学

  3. その他 / その他  / 林産科学・木質工学

現在の研究課題とSDGs 3

  1. 飛行時間分光法による生物材料の光計測に関する研究

  2. 近赤外分光法による生物材料の非破壊計測に関する研究

  3. 木材の機械加工プロセスに関する研究

経歴 9

  1. 名古屋大学   大学院生命農学研究科   部長(学部長・研究科長)

    2019年4月 - 2021年3月

  2. 名古屋大学   大学院生命農学研究科   部長(学部長・研究科長)

    2019年4月 - 2021年3月

  3. 日本学術振興会 学術システム研究センター 専門研究員

    2013年4月 - 2016年3月

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    国名:日本国

  4. 名古屋大学大学院生命農学研究科 教授

    2004年11月

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    国名:日本国

  5. 文部科学省 在外研究員

    2001年12月 - 2002年10月

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    国名:日本国

  6. 名古屋大学大学院 生命農学研究科 助手

    1999年4月 - 2004年11月

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    国名:日本国

  7. 通産省工業技術院 名古屋工業技術研究所 流動研究員

    1999年4月 - 2000年3月

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    国名:日本国

  8. 名古屋大学農学部助手

    1990年4月 - 1999年3月

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    国名:日本国

  9. 帝人製機株式会社

    1988年4月 - 1989年3月

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    国名:日本国

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学歴 2

  1. 名古屋大学   農学研究科   林産学

    - 1989年3月

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    国名: 日本国

  2. 名古屋大学   農学部   林産学

    - 1987年3月

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    国名: 日本国

所属学協会 6

  1. 日本木材学会   副会長、理事

    2019年6月 - 2021年6月

  2. 日本分光学会

  3. 日本食品科学工学会   近赤外研究会 会長

    2016年12月 - 2020年11月

  4. アジア近赤外研究会   会長

    2018年6月 - 現在

  5. 国際近赤外研究会

    2019年10月 - 現在

  6. アジア近赤外研究会

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受賞 10

  1. the Gerald S. Birth Award

    2018年8月   The council for Near Infrared Spectroscopy  

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    受賞区分:国内外の国際的学術賞  受賞国:アメリカ合衆国

  2. 平成29年度紙パルプ技術協会賞

    2018年10月   紙パルプ技術協会  

    河部千香、深沢博之, 稲垣哲也

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    受賞区分:学会誌・学術雑誌による顕彰  受賞国:日本国

  3. 平成29年度印刷朝暘会賞

    2018年10月   一般財団法人印刷朝陽会  

    河部千香、深沢博之, 稲垣哲也

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    受賞区分:出版社・新聞社・財団等の賞  受賞国:日本国

  4. Tomas Hirschfeld Award

    2017年6月   The International Council for Near Infrared Spectroscopy  

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    受賞区分:国内外の国際的学術賞  受賞国:デンマーク王国

  5. The shield of honor award

    2017年4月  

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    受賞国:タイ王国

  6. 日本木材学会賞

    2004年2月   日本木材学会  

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    受賞国:日本国

  7. Buchi NIR Award

    2003年10月   Buchi Labottechnik  

  8. PerkinElmer Awards

    2003年4月   Organizing Committee of NIR 2003  

  9. 林業科学技術振興賞

    2003年5月   財団法人林業科学技術振興所  

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    受賞国:日本国

  10. NIR Advance Award

    1998年11月   日本食品科学工学会  

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    受賞国:日本国

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論文 355

  1. Using near-infrared spectroscopy to determine moisture content, gel strength, and viscosity of gelatin 査読有り 国際共著

    Duthen Simon, Levasseur-Garcia Cecile, Kleiber Didier, Violleau Frederic, Vaca-Garcia Carlos, Tsuchikawa Satoru, Raynaud Christine Delgado, Dayde Jean

    FOOD HYDROCOLLOIDS   115 巻   2021年6月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Food Hydrocolloids  

    Gelatin is a natural biopolymer obtained by denaturation and partial hydrolysis of fibrous collagen, which is a fibrous protein present in the connective tissues of all species in the animal kingdom. Gelatin is used in many different industries, such as food, pharmaceuticals, photography, and cosmetics. The control of its physical properties is therefore of primary economic and technical importance for the gelatin industry, in particular because drying gelatin is the most expensive step in the manufacturing process and because customers demand products with well-controlled moisture content, gel strength, and viscosity. Consequently, a tool that provides rapid and nondestructive, real time analysis of gelatin would provide a definite competitive advantage. One such tool may be near-infrared (NIR) spectroscopy, which is a well-known analytical technique to determine the moisture content of complex matrices. We therefore use this technique to determine the moisture content, gel strength, and viscosity of 135 industrial gelatins. NIR spectra were acquired by using in reflectance mode a Fourier-transform NIR spectrometer with an integrating sphere to make a chemometric study of the industrial gelatins to determine the accuracy with which this technique can estimate moisture content, gel strength, and viscosity. The predictive accuracy for these parameters is quantified by using the ratio of performance of deviation (RPD), which gives 8.8, 3.7, and 2.1 in cross-validation, and 3.9, 1.8, and 1.9 in testing, respectively. Finally, we discuss the use of this technique in industrial conditions.

    DOI: 10.1016/j.foodhyd.2021.106627

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  2. Terahertz time-domain spectroscopy as a novel tool for crystallographic analysis in cellulose: the potentiality of being a new standard for evaluating crystallinity 査読有り

    Wang Han, Tsuchikawa Satoru, Inagaki Tetsuya

    CELLULOSE   28 巻 ( 9 ) 頁: 5293 - 5304   2021年6月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Cellulose  

    Given that terahertz (THz) radiation responds to intermolecular forces such as hydrogen bonds, THz time-domain spectroscopy (THz-TDS) has expanded possibilities in cellulose research. In this study, THz-TDS was used to investigate the crystallinity of three types of cellulose-based materials. Microcrystalline cellulose (MCC) and wood were ball milled at different times, and pseudo-wood was a mixture of MCC and lignin of different mass fractions. All the samples showed peaks at 3.04 THz in the THz mass absorption coefficient spectra. Further, the spectra from 2.79 THz to 3.32 THz were cut out and detrended by subtraction from a baseline. The integrated intensity of the detrended spectra showed a correlation with the mass fraction of lignin of the pseudo-wood samples, and ball milling time of the MCC and wood samples. The correlation was similar with the crystallinity index calculated from X-ray powder diffraction. Moreover, the original wood sample without ball milling had an integrated intensity that was about 30% that of the original MCC sample, matching with the cellulose concentration of the wood (about 30% to 40%). We normalized the integrated intensity of 2.79 THz to 3.32 THz into 1 to 0 by a min–max algorithm and proposed a new “index” for evaluating crystallinity.

    DOI: 10.1007/s10570-021-03902-x

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  3. Modal Analysis and Experiment of a Lycium barbarum L. Shrub for Efficient Vibration Harvesting of Fruit 査読有り

    Zhao Jian, Tsuchikawa Satoru, Ma Te, Hu Guangrui, Chen Yun, Wang Zhiwei, Chen Qingyu, Gao Zening, Chen Jun

    AGRICULTURE-BASEL   11 巻 ( 6 )   2021年6月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Agriculture (Switzerland)  

    The most common harvesting method of Lycium barbarum L. (L. barbarum) is manual harvesting, resulting in low efficiency and high cost. Meanwhile, the efficiency of vibration harvesting, which is considered an efficient mechanical harvesting method, can be significantly improved if the optimized resonance frequency of the shrub can be obtained. To vibration harvest fruit efficiently, a 3D model of the shrub was established based on measurements of the shape parameters, and material mechanics models of the branches were established based on physical tests. The modal analysis of the shrub based on finite element method (FEM) simulation was performed to obtain the range of resonance frequency, and the modal experiment of the shrub using acceleration sensors and an impact hammer was conducted to obtain the accurate resonance frequency. Based on the results of the modal analysis and experiment, the optimized resonance frequency was determined to be 2 Hz. The field experiment showed that the fruit fell off when the branches were vibrated at this frequency. The results provide the design basis for the efficient vibration harvesting of L. barbarum.

    DOI: 10.3390/agriculture11060519

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  4. Finite Element Method Simulations and Experiments of Detachments of Lycium barbarum L. 査読有り

    Zhao Jian, Ma Te, Inagaki Tetsuya, Chen Qingyu, Gao Zening, Sun Lijuan, Cai Haoxuan, Chen Chao, Li Chuanlin, Zhang Shixia, Tsuchikawa Satoru, Chen Jun

    FORESTS   12 巻 ( 6 )   2021年6月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Forests  

    When harvesting Lycium barbarum L., excess amounts of detachments of the half-ripe fruit, unripe fruit, flowers, and leaves significantly affect the yield and adversely affect the subsequent processing, such as drying and grading. Finite element method (FEM) simulations and experiments of detachments were performed to harvest more ripe fruit and less half-ripe fruit, unripe fruit, flowers, and leaves. Three-dimensional (3D) models of the ripe fruit, half-ripe fruit, unripe fruit, flowers, leaves, fruit calyxes (flower calyx), fruit stems (flower stem), and branches were constructed using a 3D scanner, and material mechanics models of the above parts were established based on physical tests with universal testing machines. Detachment simulations and experiments of the ripe fruit, half-ripe fruit, unripe fruit, flowers, and leaves were performed to determine the detachment mechanisms and sequences. The detachment forces of each set of two parts were obtained. The field experiments showed that the detachment force between the fruit and calyx of ripe fruit was the lowest value of these forces, and only the ripe fruit was the first to detach from the calyx when harvesting. The results provided data support on the mechanics properties of wood and the optimization basis for the harvesting method of L. barbarum.

    DOI: 10.3390/f12060699

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  5. Demonstration of the applicability of visible and near-infrared spatially resolved spectroscopy for rapid and nondestructive wood classification 査読有り

    Ma Te, Inagaki Tetsuya, Tsuchikawa Satoru

    HOLZFORSCHUNG   75 巻 ( 5 ) 頁: 419 - 427   2021年5月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Holzforschung  

    Although visible and near-infrared (Vis-NIR) spectroscopy can rapidly and nondestructively identify wood species, the conventional spectrometer approach relies on the aggregate light absorption due to the chemical composition of wood and light scattering originating from the physical structure of wood. Hence, much of the work in this area is still limited to further spectral pretreatments, such as baseline correction and standard normal variate to reduce the light scattering effects. However, it should be emphasized that the light scattering rather than absorption inwood is dominant, and thismust be effectively utilized to achieve highly accurate and robust wood classification. Here a novelmethod based on spatially resolved diffuse reflectance (wavelength range: 600-1000 nm) was demonstrated to classify 15 kinds of wood. A portable Vis-NIR spectral measurement system was designed according to previous simulations and experimental results. To simplify spectral data analysis (i.e., against overfitting), support vector machine (SVM) model was constructed for wood sample classification using principal component analysis (PCA) scores. The classification accuracies of 98.6% for five-fold crossvalidation and 91.2%for test set validation were achieved. This study offers enhanced classification accuracy and robustness over other conventional nondestructive approaches for such various kinds of wood and sheds light on utilizing visible and short-wave NIR light scattering for wood classification.

    DOI: 10.1515/hf-2020-0074

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  6. Characteristics of Self-Excited Alternate-Tooth Vibration of Circular Saw Blade 査読有り

    Takeyama Ken, Yokochi Hideyuki, Nishio Satoru, Tsuchikawa Satoru

    BIORESOURCES   16 巻 ( 2 ) 頁: 3840 - 3850   2021年5月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.15376/biores.16.2.3840-3850

    Web of Science

  7. Non-destructive and fast method of mapping the distribution of the soluble solids content and pH in kiwifruit using object rotation near-infrared hyperspectral imaging approach 査読有り 国際共著

    Ma Te, Xia Yu, Inagaki Tetsuya, Tsuchikawa Satoru

    POSTHARVEST BIOLOGY AND TECHNOLOGY   174 巻   2021年4月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Postharvest Biology and Technology  

    This work aimed to offer a non-destructive and fast approach to visualizing the soluble solids content (SSC) and acidity (pH) of the whole kiwifruit. Most of the visible-near-infrared spectral imaging techniques used in postharvest fruit and vegetables assessment exhibit issues related to the identification of the quality spatial distribution within intact samples, mainly due to sampling surface curvature effects. Here, a push-broom-type NIR hyperspectral imaging camera and a sample rotation stage were combined to scan entire kiwifruit surfaces. Then, key wavelengths in the range of 1002–2300 nm were extracted for constructing SSC and pH calibration models by partial least squares regression analysis. The resulting SSC prediction accuracy was sufficiently high: the coefficient of determination (R2cv) and the root mean square error (RMSEcv) of cross-validation set were 0.74 and 0.7 %, respectively. For pH, the R2cv and RMSEcv were 0.64 and 0.14, respectively. Finally, the SSC and pH 360˚mapping results surpassed earlier works in this area that they showed a distinct spatial distribution within each intact sample. It was concluded that the proposed object rotation hyperspectral imaging approach is promising for the non-destructive prediction mapping of SSC and pH in kiwifruit or other cylindrical-shaped samples.

    DOI: 10.1016/j.postharvbio.2020.111440

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  8. Rapid and nondestructive evaluation of hygroscopic behavior changes of thermally modified softwood and hardwood samples using near-infrared hyperspectral imaging (NIR-HSI) 査読有り 国際共著

    Ma Te, Schimleck Laurence, Inagaki Tetsuya, Tsuchikawa Satoru

    HOLZFORSCHUNG   75 巻 ( 4 ) 頁: 345 - 357   2021年4月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Holzforschung  

    The objective of this work was to provide a rapid and nondestructive imaging method for evaluating the hygroscopic behavior of thermally modified lignocellulosic materials (softwood and hardwood). The difference in the hygroscopic behavior was explained by moisture content (MC) mapping results and molecular association characteristics of absorbed water (i.e. weakly, moderately, and strongly hydrogen-bonded water molecules) with wood at various relative humidities (RH). To achieve this goal, near-infrared (NIR) spectral images in the wavelength range 1816-2130 nm (covering the combination of stretching and deformation vibrations for OH) were used to visualize MC distributions over the surface of Japanese cedar and European beech samples which had been thermally treated at different temperatures. A curve fitting method was utilized to explore changes in water-wood structure characteristics based on shifts to longer wavelength in spectral signals caused by increasing MC. The curve fitting results support the recent nuclear magnetic resonance (NMR) studies that different bound water stabilities may pool in different compartments of the wood cell wall. Furthermore, water was firmly bound to wood at low RHs and H-bonds gained mobility as the number of absorbed molecules increased. It is concluded that NIR hyperspectral imaging also has the potential to be a complementary methodology for studying the transient changes of wood-water interactions before equilibrium.

    DOI: 10.1515/hf-2019-0298

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  9. Y Rapid and nondestructive evaluation of soluble solids content (SSC) and firmness in apple using Vis-NIR spatially resolved spectroscopy 査読有り 国際共著

    Ma Te, Xia Yu, Inagaki Tetsuya, Tsuchikawa Satoru

    POSTHARVEST BIOLOGY AND TECHNOLOGY   173 巻   2021年3月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1016/jpostharvbio.2020.111417

    Web of Science

  10. Rapid and nondestructive evaluation of soluble solids content (SSC) and firmness in apple using Vis–NIR spatially resolved spectroscopy 査読有り

    Ma T., Xia Y., Inagaki T., Tsuchikawa S.

    Postharvest Biology and Technology   173 巻   2021年3月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Postharvest Biology and Technology  

    Visible–near infrared (Vis–NIR) spectroscopy is a rapid and nondestructive method used to characterize organic compounds in postharvest fruit and vegetable assessment. However, developing robust calibration models is a challenge as conventional spectrometers collect only the cumulative effects of light absorption and scattering. In this study, a multifiber-based Vis–NIR spatially resolved spectra measurement system was designed for simultaneous evaluation of soluble solid content (SSC) and firmness in apple. Thirty silica fibers separated into five groups at 1, 2, 3, 4, and 5 mm away from the light illumination point and connected to a cost-effective Vis–NIR hyperspectral imaging camera were used to acquire spectral data with an improved signal-to-noise ratio (S/N) by a two-step signal averaging process (i.e., 30 camera pixels per fiber and six optical fibers per group). Reflectance ratio spectra were then calculated by dividing the diffusely reflected light intensity detected at distance d +△ by that detected at distance d to realize a light reference-free approach. Finally, the useful explanatory variables were selected by competitive adaptive reweighted sampling (CARS) to construct individual calibration models for various regions. The coefficients of determination (Rcal2) and the root mean square errors (RMSEcal) of the best-performing calibration models were approximately 0.97 and 0.20 % for SSC and 0.96 and 0.37 N for firmness, respectively. Furthermore, the predicted results were 0.92 and 0.35 % for SSC and 0.87 and 0.71 N for firmness. Our method offers low-cost and portable detection of SSC and firmness for postharvest fruit evaluation.

    DOI: 10.1016/j.postharvbio.2020.111417

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  11. Terahertz time-domain spectroscopy as a novel tool for crystallographic analysis in cellulose 査読有り

    Wang Han, Horikawa Yoshiki, Tsuchikawa Satoru, Inagaki Tetsuya

    CELLULOSE   27 巻 ( 17 ) 頁: 9767 - 9777   2020年11月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Cellulose  

    Terahertz (THz) radiation is responsive to optical phonons in crystal lattices; therefore, THz time-domain spectroscopy (THz-TDS) has potential utility in crystallographic analysis. In this study, THz-TDS was used to investigate cellulose samples extracted from different sources with varying ratios of Iα and Iβ fractions. This is the first study to report that the absorption coefficient in the THz region of cellulose Iα and Iβ presents different characteristic absorption peaks around 2 THz. This can be used to distinguish the cellulose I allomorph, which exhibits differences in its crystalline structure. The absorption coefficient at 2.11 and 2.38 THz showed a considerable linear correlation with the Iα fraction of the cellulose samples. The absorption coefficient spectra of 1.88–3.40 THz were further detrended and separated into three Gaussian peaks. The correlations between the parameters of these separated peaks (integrated intensities, peak positions) and the crystalline structural values (d-spacing, crystalline size, crystallinity index) that calculated from the X-ray diffraction (XRD) pattern were investigated.

    DOI: 10.1007/s10570-020-03508-9

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  12. Rapid and non-destructive seed viability prediction using near-infrared hyperspectral imaging coupled with a deep learning approach 査読有り

    Ma Te, Tsuchikawa Satoru, Inagaki Tetsuya

    COMPUTERS AND ELECTRONICS IN AGRICULTURE   177 巻   2020年10月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Computers and Electronics in Agriculture  

    Seeds are the basis of the agricultural food industry, greater insights into seed viability before sowing could improve storage management and field performance. In the present study, we aimed to address this issue by using highly cost-efficient near-infrared hyperspectral imaging (NIR-HSI) and a convolutional neural network (CNN) deep learning approach. An NIR-HSI camera was used because it can recognize both molecular vibration information (i.e. chemical component differences) and its spatial distribution in each seed sample; this camera is much more informative than a regular RGB digital camera. Using this technology, the emphasis of this study was firstly to provide a methodology for enhancing the interpretability of viable and non-viable seeds via principal component analysis (PCA) and support vector machine (SVM) viability classification analysis of NIR-HSI data. A CNN was then constructed to“cognize” the differences in viable and non-inviable seeds and classify them automatically. Experimental results indicate that the methodology produces a ~90% classification accuracy for both a five-fold cross-validation set and a test set of naturally aged Japanese mustard spinach seeds. Therefore, this study provides a new strategy for effective and practical seed viability prediction.

    DOI: 10.1016/j.compag.2020.105683

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  13. Physical and Mechanical Properties of Fast Growing Polyploid Acacia Hybrids (A. auriculiformisxA. mangium) from Vietnam 査読有り 国際共著

    Dang Duc Viet, Ma Te, Inagaki Tetsuya, Nguyen Tu Kim, Nghiem Quynh Chi, Tsuchikawa Satoru

    FORESTS   11 巻 ( 7 )   2020年7月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Forests  

    Acacia plants are globally important resources in the wood industry, but particularly in Southeast Asian countries. In the present study, we compared the physical and mechanical properties of polyploid Acacia (3x and 4x) clones with those of diploid (2x) clones grown in Vietnam. We randomly selected 29 trees aged 3.8 years from different taxa for investigation. BV10 and BV16 clones represented the diploid controls; X101 and X102 were the triploid clones; and AA-4x, AM-4x, and AH-4x represented neo-tetraploid families of Acacia auriculiformis, Acacia mangium, and their hybrid clones. The following metrics were measured in each plant: stem height levels, basic density, air-dry equilibrium moisture content, modulus of rupture (MOR), modulus of elasticity (MOE), compression strength, and Young's modulus. We found that the equilibrium moisture content significantly differed among clones, and basic density varied from pith-to-bark and in an axial direction. In addition, the basic density of AA-4x was significantly higher than that of the control clones. Furthermore, the MOR of AM-4x was considerably lower than the control clones, whereas the MOE of X101 was significantly higher than the control values. The compression strength of AM-4x was significantly lower than that of the control clones, but AH-4x had a significantly higher Young's modulus. Our results suggest that polyploid Acacia hybrids have the potential to be alternative species for providing wood with improved properties to the forestry sector of Vietnam. Furthermore, the significant differences among the clones indicate that opportunities exist for selection and the improvement of wood quality via selective breeding for specific properties.

    DOI: 10.3390/f11070717

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  14. Rapidly visualizing the dynamic state of free, weakly, and strongly hydrogen-bonded water with lignocellulosic material during drying by near-infrared hyperspectral imaging 査読有り

    Ma Te, Inagaki Tetsuya, Tsuchikawa Satoru

    CELLULOSE   27 巻 ( 9 ) 頁: 4857 - 4869   2020年6月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Cellulose  

    Real-time monitoring of the dynamic state of water molecular structure in lignocellulosic material is challenging, but important for both theoretical studies and industrial applications. In the present study, three typical wood samples which have a fundamental difference in the anatomical structure were scanned in the near-infrared spectral range, and images were acquired from wavelengths of 1002–1847 nm during drying. Then, partial least squares regression was used to determine the water content by mass, and principal component analysis was utilized to characterize the variance of NIR difference spectral data between 1340 and 1610 nm after baseline correlation for showing the distribution changing from free water to bound water during air drying. It was clarified that the PC1 loading mainly correlates with simple water content by mass, whereas the PC2 loading contains information about water–wood hydrogen structure interactions. The three loading curve peaks of PC2 could be correlated with free, weakly bound, and strongly bound water based on longer wavelength shifting. Finally, PC1 and PC2 scores were comprehensively applied to show the distribution changing from free water to bound water in each wood sample with a 62.5 μm/pixel high spatial resolution.

    DOI: 10.1007/s10570-020-03117-6

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  15. Simultaneous detection of density, moisture content and fiber direction of wood by THz time-domain spectroscopy 査読有り

    Kashima Moe, Tsuchikawa Satoru, Inagakr Tetsuya

    JOURNAL OF WOOD SCIENCE   66 巻 ( 1 )   2020年4月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Wood Science  

    In the wood product-manufacturing process, the physical properties of wood must be monitored. The terahertz (THz) radiation has a high potential for sensing and imaging wood with a good spatial resolution. This study demonstrates the simultaneous prediction of the density, moisture content, and fiber direction of wood, which are important in determining the wood quality, using THz time-domain spectroscopy. We measured the spectra of 12 kinds of wood at various moisture contents while rotating the sample against the THz wave polarization. The fiber direction was predicted by observing the birefringence, which is the optical property of a material, in which the refractive index depends on the polarization direction. The density and the moisture content were predicted by multiple linear regression using the refractive indices and absorption coefficients obtained from the THz measurement. In a series of THz measurements, we successfully identified the wood fiber direction with an R2 of 0.90 and a root mean square error (RMSE) of 16.51° (total measured range = 0–170°), the density with an R2 of 0.97 and an RMSE of 0.022 (total measured range = 0.25–0.67 g/cm3), and the moisture content with an R2 of 0.78 and an RMSE of 4.06 (total measured range = 0.00–30.98%).

    DOI: 10.1186/s10086-020-01874-3

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  16. Cognitive spectroscopy for wood species identification: Near infrared hyperspectral imaging combined with convolutional neural networks

    Kanayama H.

    Analyst   144 巻 ( 21 ) 頁: 6438 - 6446   2019年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Analyst  

    DOI: 10.1039/c9an01180c

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    PubMed

  17. Analysis of wood thermal degradation using 2D correlation of near infrared and visible-light spectroscopy 査読有り

    Mahdiyanti Siti Hanifah, Inagaki Tetsuya, Tsuchikawa Satoru

    JOURNAL OF NEAR INFRARED SPECTROSCOPY   27 巻 ( 5 ) 頁: 354 - 369   2019年10月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Near Infrared Spectroscopy  

    Wood changes its properties, especially color, as a result of thermal degradation. In this study, change in wood properties due to thermal degradation have been studied using the nondestructive test methods of near infrared spectroscopy, CIELAB color measurement, visible-light spectroscopy, and Arrhenius time–temperature superposition. Arrhenius time–temperature superposition allowed analysis of near infrared and visible-light spectra, and color parameters to predict thermal degradation and color change of wood at 120–180℃ for 6 min to nine months duration. Two-dimensional correlation spectroscopy for the complementary analysis of near infrared and visible-light spectroscopy was applied to investigate chemical changes during wood thermal degradation that cause the observed color change. Visible-light spectroscopy with CIELAB color measurement was used to obtain information on color changes, and near infrared spectroscopy was applied in the measurement of chemical changes during thermal degradation. Changes in spectral intensities in 2D correlation spectroscopy indicated that different chemical components are responsible for color change during heat treatment and accelerated aging of wood. With dry-thermal treatment, the hemicellulose content decreased following a color change, whereas cellulose and lignin/extractives decreased with hygro-thermal treatment.

    DOI: 10.1177/0967033519863878

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  18. Three-dimensional grain angle measurement of softwood (Hinoki cypress) using near infrared spatially and spectrally resolved imaging (NIR-SSRI) 査読有り

    Ma Te, Inagaki Tetsuya, Tsuchikawa Satoru

    HOLZFORSCHUNG   73 巻 ( 9 ) 頁: 817 - 826   2019年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Holzforschung  

    As the strength of wood is greatly affected by its three-dimensional (3D) grain angles (the dive angle and the surface angle), the wood industry today requires automatic, rapid, and robust measurement techniques for measuring them simultaneously. In the present study, a near infrared spatially and spectrally resolved imaging (NIR-SSRI) system was designed in a line scan model, mainly including an NIR hyperspectral imaging camera and a halogen spotlight source (Ø 1 mm). Spatially resolved diffuse reflectance images at three target wavelengths (1002 nm, 1217 nm, and 1413 nm) were obtained from Hinoki cypress [Chamaecyparis obtusa (Siebold & Zucc.) Endl.] samples at various (0°, 3°, 6°, ⋯ 45°) dive angles and surface angles (0°, 3°, 6°, ⋯ 45°). The scattering patterns caused by the "tracheid effect" were almost elliptical. Subsequently, nonlinear least squares fitting was used to determine their eccentricities (e) and rotation angles (θ). The e values at each selected wavelength were highly correlated with the dive angle reference values; and the global identification model developed using Gaussian process regression (GPR) under five-fold cross-validation (CV) reached a determination coefficient (r2) of 0.98 with a root mean square error (RMSE) of 2.2°. On the other hand, local surface angle identification models developed using linear regression analysis achieved determination coefficients higher than 0.90 on r2 and an RMSE of CV lower than 3.8° when the dive angle was lower than 30°.

    DOI: 10.1515/hf-2018-0273

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  19. Determination of Dielectric Function of Water in THz Region in Wood Cell Wall Result in an Accurate Prediction of Moisture Content 査読有り

    Wang Han, Inagaki Tetsuya, Hartley Ian D., Tsuchikawa Satoru, Reid Matthew

    JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES   40 巻 ( 6 ) 頁: 673 - 687   2019年6月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Infrared, Millimeter, and Terahertz Waves  

    This report follows up previous work that presented a model for the simultaneous detection of moisture content and density of wood using Terahertz time-domain spectroscopy. A significant improvement in the prediction accuracy of the model is demonstrated by including a moisture content-dependent dielectric function for the water within the wood samples. Justification for using the dielectric function is presented, the prediction accuracy is quantified, and the results compared with prior work.

    DOI: 10.1007/s10762-019-00594-0

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  20. A new approach based on a combination of capacitance and near-infrared spectroscopy for estimating the moisture content of timber 査読有り

    Vu Thi Hong Tham, Inagaki Tetsuya, Tsuchikawa Satoru

    WOOD SCIENCE AND TECHNOLOGY   53 巻 ( 3 ) 頁: 579 - 599   2019年5月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Wood Science and Technology  

    The moisture content (MC) of wood influences its material properties. Determination of MC is essential in both the research and manufacturing fields. This study examined a nondestructive method for estimating MC rapidly and effectively. A capacitance sensor and a near-infrared (NIR) spectrometer were used to measure the MC of Japanese cedar and Japanese cypress timber. High-frequency capacitance (20 MHz) and NIR spectral absorption (908–1676 nm) data were collected for cross section and tangential section, as well as for the whole-sample average, in two MC ranges: from the green to the fiber saturation point (FSP) and from FSP to air-dried state. The results indicated that when standard error of prediction (SEP) is compared, the performance in [FSP to air-dried state] was better; when coefficient of determination in cross-validation (Rval2) and residual predictive deviation in cross-validation (RPD val ) were compared, the performance in [Green to FSP] was better. Statistical analysis was performed using multiple linear regression and partial least squares. Combining capacitance and NIR absorbance at two wavelengths (Capacitance + NIR-MLR calibration) from the green to FSP was the best calibration yielding the most promising results: Rval2 = 0.96, SEP = 5.20% and RPD val = 4.97 on the cross section of samples. The results were higher than those of other calibrations in R 2 and SEP and RPD values. The NIR-PLS calibration performed better than others with quite good R 2 , lower SEP and higher RPD in the MC range from FSP to air-dried state. The first calibration using only capacitance of wood was good in the first range of MC, but it is not good in the second range (R 2 under 0.5). Depending on the MC range, the performance of each calibration was different. In both MC ranges, the results on the cross section were higher than on the tangential section due to the anisotropic characteristics of wood material. From Capacitance + NIR-MLR calibration, the predicted models were developed using multiple linear regression and logarithmic regression. Results suggest the possibility of developing a new portable device combining a capacitance sensor and NIR spectroscopy to accurately predict the MC of wood.

    DOI: 10.1007/s00226-019-01077-0

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  21. Rapid identification of wood species by near-infrared spatially resolved spectroscopy (NIR-SRS) based on hyperspectral imaging (HSI) 査読有り

    Ma T.

    Holzforschung   73 巻 ( 4 ) 頁: 323 - 330   2019年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Holzforschung  

    DOI: 10.1515/hf-2018-0128

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  22. Near infrared estimation of concentration of ginsenosides in Asian ginseng 査読有り

    Inagaki Tetsuya, Katayama Norihisa, Cho Rae-Kwang, Chen Xijun, Tsuchikawa Satoru

    JOURNAL OF NEAR INFRARED SPECTROSCOPY   27 巻 ( 2 ) 頁: 115 - 122   2019年4月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Near Infrared Spectroscopy  

    In this study, the feasibility of near infrared reflectance spectroscopy for the quality evaluation of the main bioactive compounds, ginsenosides, in Panax ginseng was examined. Second derivative NIR spectra of standard reagents of ginsenoside Rg1, Re, Rb1, Rc, Rb2 and Rd were used for analysis. Characteristic bands were observed at around 5250 cm−1 in the spectra of ginsenoside Rg1 group (including Rg1 and Re); however, this was not to be observed on the spectra of ginsenoside Rb1 group (including Rb1, Rc, Rb2 and Rd). PLS regression models were constructed of air-dry ginseng powder samples and ginsenoside content in ginsengs was determined by HPLC methods. The calibration models covered various types of ginseng (white ginseng, red ginseng and bleached ginseng) from various cultivated areas (Japan, China and Korea) and were well established for each kind of ginsenoside. It was shown that NIR spectroscopy can be used for the accurate prediction of ginsenoside.

    DOI: 10.1177/0967033518814851

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  23. Effect of knots and holes on the modulus of elasticity prediction and mapping of sugi (Cryptomeria japonica) veneer using near-infrared hyperspectral imaging (NIR-HSI) 査読有り

    Sofianto Imran Arra'd, Inagaki Tetsuya, Ma Te, Tsuchikawa Satoru

    HOLZFORSCHUNG   73 巻 ( 3 ) 頁: 259 - 268   2019年3月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Holzforschung  

    Naturally occurring knots reduce the mechanical strength of wood. Veneers from sugi (Cryptomeria japonica) served as research material to study the effect of knots and holes. Veneer samples were first subjected to a three-point bending test to obtain measured modulus of elasticity (MOE) values. Then, near-infrared (NIR) hyperspectral imaging (HSI) was used to construct a prediction model and map the predicted MOE values. This is the first attempt for MOE prediction from the entire veneer surface based on NIR-HSI technology, while the mathematical part relies on chemometrics and cross-validation partial least squares regression (CV-PLSR). Maps of MOE prediction values could distinguish between latewood (LW) and earlywood (EW), as well as between a sound knot and a dead knot.

    DOI: 10.1515/hf-2018-0060

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  24. DETERMINATION OF CAROTENOIDS AND DOBI CONTENT IN CRUDE PALM OIL BY SPECTROSCOPY TECHNIQUES: COMPARISON OF RAMAN AND FT-NIR SPECTROSCOPY

    Nokkaew Rayakorn, Punsuvon Vittaya, Inagaki Tetsuya, Tsuchikawa Satoru

    INTERNATIONAL JOURNAL OF GEOMATE   16 巻 ( 55 ) 頁: 92-98   2019年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.21660/2019.55.4813

    Web of Science

  25. Non-destructive evaluation of wood stiffness and fiber coarseness, derived from SilviScan data, via near infrared hyperspectral imaging 査読有り

    Ma Te, Inagaki Tetsuya, Tsuchikawa Satoru

    JOURNAL OF NEAR INFRARED SPECTROSCOPY   26 巻 ( 6 ) 頁: 398 - 405   2018年12月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Near Infrared Spectroscopy  

    Near infrared hyperspectral imaging combined with partial least squares regression analysis was used to evaluate wood stiffness (modulus of elasticity) and fiber coarseness. Five samples with normal wood and compression wood collected from two Japanese Cedar (Cryptomeria japonica) trees were analyzed. To achieve high reliability of the prediction values, a SilviScan system (X-ray densitometry, X-ray diffractometry, and optical microscopy) with the high spatial resolution was used for measuring reference data. The measurement interval for modulus of elasticity and fiber coarseness was 1µm and 25 µmm, respectively. After spectral pre-treatment and key wavelengths selection, partial least squares analysis was applied to calibrate near infrared data to reference values. The determination coefficient (RCV2) of modulus of elasticity was 0.66 with a root mean square error of cross validation (RMSECV) of 1.80 GPa. For the constructed fiber coarseness calibration model, RCV2 and RMSECV were 0.62 and 35.02 µmm/g, respectively. Finally, modulus of elasticity and fiber coarseness mapping results show detailed information (156 µmm/pixel) at the grown ring level. The differences among earlywood, latewood, and compression wood were all well identifiable.

    DOI: 10.1177/0967033518808053

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  26. NIR estimation of concentration of ginsenosides in Asian ginseng 査読有り

    Inagaki, T.; Katayama, N.; Cho, R.; Chen, X.; Tsuchikawa S.

    Journal of Near Infrared Spectroscopy     2018年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: https://doi.org/10.1177/0967033518814851

  27. Inspection of Microfibril Angle of Sugi Wood by THz-TDS 査読有り

    Wang H., Tsuchikawa S., Inagaki T.

    International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz   2018-September 巻   2018年10月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz  

    Wood as a biological material has large differences in individual properties, and terahertz time-domain spectroscopy (THz-TDS) provide a new possibility for the wood products industry since THz exhibits high transparency to wood with big birefringence and diattenuation. By using the complex refractive index and absorption coefficient, THz is excepted to estimate important properties such as fiber orientation, microfibril angle (MFA) etc. simultaneously. In this study, sugi was used as sample because of its simple structure. Density and moisture content were predicted by using the real part of complex refractive index combined with absorption coefficient and showed a high correlation between measured and predicted values, prediction of MFA is still an ongoing mission.

    DOI: 10.1109/IRMMW-THz.2018.8510303

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  28. Quality Evaluation of Engineered Wood by THz-TDS 査読有り

    Kashima M., Tsuchikawa S., Inagaki T.

    International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz   2018-September 巻   2018年10月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz  

    This study attempts simultaneous prediction of grain angle, density and moisture content by THz time domain spectroscopy (THz-TDS) which has sufficient spatial resolution and transparency for wood. Terahertz waves transmitted through wood contain information on moisture content, density, grain angle and crystallinity of the sample. In this study, we measured spectra of 14 kinds of wood (5 soft wood, 9 hard woods) at various moisture contents and air-dried douglas fir while rotating the sample against the polarization of the terahertz wave. It was shown that the fiber orientation, density and moisture content of wood can be predicted simultaneously from the calculated complex permittivity.

    DOI: 10.1109/IRMMW-THz.2018.8510155

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  29. Optical characteristics of Douglas fir at various densities, grain directions and thicknesses investigated by near-infrared spatially resolved spectroscopy (NIR-SRS) 査読有り

    Ma Te, Schajer Gary, Inagaki Tetsuya, Pirouz Zarin, Tsuchikawa Satoru

    HOLZFORSCHUNG   72 巻 ( 9 ) 頁: 789 - 796   2018年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Holzforschung  

    A near-infrared spatially resolved spectroscopy (NIR-SRS) system, also called the hyperspectral imaging system, was applied in a line scanning model combined with a concentrated halogen light source (Ø 1 mm), and spatially resolved reflectance images of Douglas fir [Pseudotsuga menziesii (Mirb.) Franco] wood were obtained. The samples with various densities, grain directions and thicknesses were observed in the NIR range of 1000-1600 nm. Then, a nonlinear curve-fitting algorithm was applied based on the steady-state diffusion theory model to estimate the absorption coefficient (μa), and reduced scattering coefficients (μ′s μ) both parallel and perpendicular to the grain direction at each measurement position. The absorption scattering coefficients at 1457 nm and two kinds of reduced scattering coefficients at 1002 nm were highly correlated with wood densities measured by an X-ray densitometer. The correlation coefficients were 0.953 and 0.987 for 3 mm and 5 mm samples, respectively, while three optical profiles were combined. It can be concluded that NIR-SRS is a fast and simple method for measuring the optical characteristics of softwood, although it has a non-homogeneous cellular structure. Sub-surface density and grain direction could be predicted with satisfactory accuracy based on a few key wavelengths without relying on multivariate statistical analysis.

    DOI: 10.1515/hf-2017-0213

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  30. Determination of physical and chemical properties and degradation of archeological Japanese cypress wood from the Tohyamago area using near-infrared spectroscopy 査読有り

    Inagaki Tetsuya, Yonenobu Hitoshi, Asanuma Yuuki, Tsuchikawa Satoru

    JOURNAL OF WOOD SCIENCE   64 巻 ( 4 ) 頁: 347 - 355   2018年8月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Wood Science  

    Here, we evaluated the application of near-infrared (NIR) spectroscopy for estimating the degradation level of archeological wood samples from the Tohyamago area, the dendrochronological ages of which were also determined. The wood samples were radially cut from three logs obtained from the Tohyamago area. NIR reflectance spectra were measured from the tangential faces of air- and oven-dried wood samples using a Fourier transform NIR spectrophotometer. The second derivative spectra within the wavenumber range of 6400–5200 cm−1, in which the effect of moisture content in wood is suspected to be insignificant, showed a characteristic behavior with age. By comparing the second derivative spectral change in our wood samples with that in wood degraded by aging, thermal treatment, fungal attack, and lightning reported in the literature, we found that the second derivative spectra of wood samples from one log was similar to those of wood degraded by hygro-thermal treatment, whereas those of wood samples from another log was similar to those of wood degraded by brown-rot fungi. The physical and chemical properties of archeological wood were well predicted using a combination of partial least square regression analysis and NIR spectroscopy.

    DOI: 10.1007/s10086-018-1718-8

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  31. Noncontact evaluation of soluble solids content in apples by near-infrared hyperspectral imaging 査読有り

    Ma Te, Li Xinze, Inagaki Tetsuya, Yang Haoyu, Tsuchikawa Satoru

    JOURNAL OF FOOD ENGINEERING   224 巻   頁: 53 - 61   2018年5月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Food Engineering  

    Near-infrared (NIR) hyperspectral imaging was used to evaluate soluble solids content (SSC) in ‘Fuji’ apples [Malus sylvestris (L.) Mill. var. domestica (Borkh. Mansf.)]. Eighty ‘Fuji’ apples were analyzed by collecting four small block samples from each one (approximately 2.0 cm × 2.0 cm × 1.5 cm). Partial least squares (PLS) regression analysis was performed to determine the relation between SSC reference data and NIR spectral data measured from each sample. The cross-validation coefficient of determination (r2) between predicted and measured SSC values is 0.89 with a root mean squared error of cross-validation (RMSECV) of 0.55%. Then, we successfully mapped SSC at a high spatial resolution (375 μm per pixel). In addition, the absorption and reduced scattering coefficients of the measured samples were determined based on a diffusion theory model. The absorption coefficients are positively correlated to the SSC values (chemical information), whereas water cored tissue content (physical information) causes a characteristic change in light scattering coefficients. The fitting results were validated by Monte Carlo simulation, and the light penetration depth in ‘Fuji’ apples was estimated to be around 0.33 cm at 1198 nm and 0.17 cm at 1450 nm, respectively.

    DOI: 10.1016/j.jfoodeng.2017.12.028

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  32. Effect of cellular structure on the optical properties of wood 査読有り

    Ban Mayuka, Inagaki Tetsuya, Ma Te, Tsuchikawa Satoru

    JOURNAL OF NEAR INFRARED SPECTROSCOPY   26 巻 ( 1 ) 頁: 53 - 60   2018年2月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Near Infrared Spectroscopy  

    To construct robust calibrations of wood properties by near infrared spectroscopy, one must independently evaluate the spectral contributions of light absorption and light scattering. However, the light propagation in wooden cellular structures is difficult to interpret because these structures are complex, heterogeneous, and anisotropic. This study investigates the reduced scattering coefficients of softwood and hardwood (with ring-porous or diffuse-porous vessels) at 846 nm by time-resolved spectroscopy. It also evaluates the effect of wooden cellular structure and air-dry density on the light propagation. After determining the reduced scattering coefficients, we observed cross-sectional microscopic images of the wood samples. Eighty-five percent of the variation in the reduced scattering coefficients was explainable by the air-dry density, area ratio of the cell wall, and the median pore area. Monte Carlo simulations of the light propagation through wood revealed that most of the photon transport occurs in the cell-wall substance.

    DOI: 10.1177/0967033518757233

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  33. Selective assessment of duplex heat-treated wood by near-infrared spectroscopy with principal component and kinetic analyses 査読有り

    Inagaki Tetsuya, Asanuma Yuuki, Tsuchikawa Satoru

    JOURNAL OF WOOD SCIENCE   64 巻 ( 1 ) 頁: 6 - 15   2018年2月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Wood Science  

    We selectively assessed the thermal and hygrothermal treatment times of duplex heat-treated samples from the softwood hinoki cypress (Chamaecyparis obtusa) and the hardwood Japanese zelkova (Zelkova serrata) using near-infrared (NIR) spectroscopy with principal component analysis (PCA) and spectral-kinetic analysis. Wood samples from each species were thermally or hygrothermally treated at 120, 130, 150, and 180 °C, and the second-derivative spectra of these samples in the 6300–5450 cm−1 range, where moisture content has the smallest effect, were then subjected to PCA. The master curve that was calculated by kinetic analysis successfully explained changes in the first principal component (PC1) scores with thermal treatment time for all temperatures. The angles between the PC1 loadings that explained the spectral variation due to thermal and hygrothermal treatment were 79° for hinoki and 80° for zelkova. Thus, calculation of the inner product between the second-derivative spectra of duplex heat-treated wood and a loading vector that explained the spectral variation due to thermal or hygrothermal treatment allowed us to selectively assess the thermal and hygrothermal treatment times.

    DOI: 10.1007/s10086-017-1670-z

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  34. A novel combined application of capacitive method and near-infrared spectroscopy for predicting the density and moisture content of solid wood 査読有り

    Vu Thi Hong Tham, Inagaki Tetsuya, Tsuchikawa Satoru

    WOOD SCIENCE AND TECHNOLOGY   52 巻 ( 1 ) 頁: 115 - 129   2018年1月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Wood Science and Technology  

    The use of a capacitive method and near-infrared (NIR) spectroscopy to simultaneously predict the density and moisture content (MC) of wood samples was investigated. Prediction accuracy of both methods was individually investigated by multivariate analyses. The capacity and absorbance at two wavelengths in the NIR range were combined to predict both the properties by the specific models. All wavelength combinations in the range of 908–1676 nm were tested, and the best combination yielding the highest coefficient of determination (R2) was chosen. This novel method showed a strong correlation between predicted and measured data, independent of sample thickness and wood species. The prediction accuracy of the wood samples, from green wood to oven-dried conditions, showed promising results for all thicknesses, with R2 = 0.79, root-mean-square error of cross-validation (RMSECV) = 0.10 g/cm3, and residual predictive deviation (RPD) = 2.22 for density and R2 = 0.80, RMSECV = 25.70%, and RPD = 2.22 for MC. In the case of below fiber saturation point to oven-dried state, R2 value was slightly decreased in the prediction of MC and slightly increased in the prediction of density, but RMSECV of MC declined significantly (maximum 5.46%) compared to the range of MC from saturated point (maximum 39.56%). These results were considerably better than those obtained by modeling the capacitive or NIR method individually, and improvement was particularly apparent in estimating density. The results suggest the possibility of a new device combining the capacitive method and NIR spectroscopy to predict density and MC more accurately.

    DOI: 10.1007/s00226-017-0974-x

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  35. Quality Evaluation of Engineered Wood by THz-TDS

    Kashima Moe, Tsuchikawa Satoru, Inagaki Tetsuya

    2018 43RD INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ)     頁: .   2018年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Web of Science

  36. Non-destructive evaluation of wood stiffness and fiber coarseness, derived from SilviScan data, via near infrared hyperspectral imaging 査読有り

    Ma, T.; Inagaki, T.; Tsuchikawa, S.

    Journal of Near Infrared Spectroscopy   26 巻 ( 6 ) 頁: 398-405   2018年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  37. Effect of knots and holes on the modulus of elasticity prediction and mapping of sugi (Cryptomeria japonica) veneer using near-infrared hyperspectral imaging (NIR-HSI) 査読有り

    114. Sofianto, I. A.; Inagaki, T.; Ma, T.; Tsuchikawa, S.

    Holzforschung     2018年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: https://doi.org/10.1515/hf-2018-0060

  38. Near-infrared hyperspectral imaging for classification of mung bean seeds 査読有り

    Phuangsombut Kaewkarn, Ma Te, Inagaki Tetsuya, Tsuchikawa Satoru, Terdwongworakul Anupun

    INTERNATIONAL JOURNAL OF FOOD PROPERTIES   21 巻 ( 1 ) 頁: 799 - 807   2018年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:International Journal of Food Properties  

    Hard mung bean seeds pose a problem in the sprouting process as they develop mold and infect neighboring seeds. Near-infrared hyperspectral imaging combined with partial least squares discriminant analysis was applied to develop a classifying model to separate hard mung beans from normal ones. The orientation of the measured beans was found to affect the classification result. The optimal partial least squares discriminant analysis model based on all orientations resulted in a correlation coefficient (R) of 0.919 with a root mean squared error of prediction of 0.197. The non-germinative parts were mapped and were concentrated at one end of the bean. Finally, a germinability index was proposed according to the proportion of colored areas between the germinative and non-germinative parts from the hyperspectral imaging results.

    DOI: 10.1080/10942912.2018.1476378

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  39. Inspection of Microfibril Angle of Sugi Wood by THz-TDS

    Wang H., Tsuchikawa S., Inagaki T.

    2018 43RD INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ)     頁: .   2018年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    Web of Science

  40. Dynamic behavior of wood chemical components under drying process measured by near infrared spectroscopy 査読有り

    Sugii Shiho, Fujimoto Takaaki, Tsutsumi Harusa, Inagaki Tetsuya, Tsuchikawa Satoru

    JOURNAL OF NEAR INFRARED SPECTROSCOPY   25 巻 ( 6 ) 頁: 400 - 406   2017年12月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Near Infrared Spectroscopy  

    This study examined the dynamic behavior of wood chemical components during the drying process using near infrared spectroscopy. Principal component analysis and generalized two-dimensional correlation spectroscopy were applied to identify significant absorption bands from the heavily overlapping near infrared spectra. The near infrared spectra were successively acquired over the moisture content range of 60-11%. The principal component analysis scores indicated that the wood-water interaction in the moisture content range of 60-46% significantly differed from that in the range of 45-11%. The synchronous 2D correlation spectrum constructed from the spectra in the moisture content range of 60-46% revealed that the cell wall components and water molecules responded to the drying process even though the wood exceeded the fiber saturation point. In the moisture content range of 45-11%, the H-bonded OH groups in the crystalline region of cellulose clearly increased with the decrease in bound water. Moreover, the sequential order of events was also clarified from the asynchronous spectrum.

    DOI: 10.1177/0967033517733379

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  41. High-resolution and non-destructive evaluation of the spatial distribution of nitrate and its dynamics in spinach (Spinacia oleracea l.) leaves by near-infrared hyperspectral imaging 査読有り

    Yang H.Y.

    Frontiers in Plant Science   8 巻   頁: 10.3389/fpls.2017.01937   2017年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Frontiers in Plant Science  

    DOI: 10.3389/fpls.2017.01937

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  42. Temperature dependence of wood photodegradation monitored by infrared spectroscopy 査読有り

    Varga Denes, Tolvaj Laszlo, Tsuchikawa Satoru, Bejo Laszlo, Preklet Edina

    JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY   348 巻   頁: 219 - 225   2017年11月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Photochemistry and Photobiology A: Chemistry  

    The temperature dependence of the photodegradation of hardwoods (beech, Fagus sylvatica L. and poplar, Populus x euramericana cv. Pannonia) and softwoods (Scots pine, Pinus sylvestris L. and spruce, Picea abies Karst.) was investigated. Samples were irradiated by a strong UV emitter mercury lamp at 30 °C, 80 °C, 120 °C and 160 °C. A series of samples was treated in the same chamber set to 30 °C, 80 °C, 120 °C and 160 °C but without light irradiation (pure thermal treatment). The chemical changes were detected by infrared spectroscopy. The same light irradiation generated much greater absorption change at 160 °C than at 30 °C. The simultaneous thermal and UV treatment generated much greater absorption increase in the whole investigated infrared region than the sum of absorption increases generated by the individual thermal treatment and UV radiation, separately. Softwoods were more sensitive to the light irradiation at elevated temperatures than hardwoods. Results revealed that four bands around 1770, 1750, 1720 and 1690 cm−1 emerged in the unconjugated carbonyl region as a result of the UV irradiation at elevated temperatures. The intensity change of these bands is highly dependent on the wood species. Absorption increase was found at 1066 and 1035 cm−1.

    DOI: 10.1016/j.jphotochem.2017.08.040

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  43. Modulus of elasticity prediction model on sugi (Cryptomeria japonica) lumber using online near-infrared (NIR) spectroscopic system 査読有り

    Sofianto, I. A.; Inagaki, T.; Kato, K.; Itoh, M.; Tsuchikawa, S.

    International Wood Products Journal   8 巻 ( 4 )   2017年10月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: https://doi.org/10.1080/20426445.2017.1378398

  44. Modulus of elasticity prediction model on sugi (Cryptomeria japonica) lumber using online near-infrared (NIR) spectroscopic system 査読有り

    Sofianto I.A., Inagaki T., Kato K., Itoh M., Tsuchikawa S.

    International Wood Products Journal   8 巻 ( 4 ) 頁: 193 - 200   2017年10月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:International Wood Products Journal  

    In this study, static bending measurements and online NIR spectra acquisitions were combined to construct modulus of elasticity (MOE) prediction model for sugi lumber. NIR spectra were acquired from tangential surface of sugi lumbers at a speed of 120 m min−1 to assess its effectiveness in the wood industry. Cross-validation partial least squares regression (CV-PLSR) and test-set-validation partial least squares regression (TSV-PLSR) analyses were employed for analysing the data. The second derivative (2d) spectra with 19 smoothing points (Savitzky–Golay algorithm, second polynomial) gave the best result as spectral pre-processing treatment with the lowest root mean square error of cross-validation and the highest coefficient of determination for cross-validation based on the optimum number of latent variables as assessed from the minimum validation residual variance value in the CV-PLSR analysis. These 2d spectra were then used in the TSV-PLSR analysis for 100 repetitions to check the robustness of the calibration.

    DOI: 10.1080/20426445.2017.1378398

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  45. Stiffness and Moisture Content Prediction Model of Wooden Veneer Using Fast Online Near-Infrared (NIR) Spectroscopic System

    Sofianto, I. A, Inagaki, T, Itoh, M, Tsuchikawa, S

    Forestry Research and Engineering: International Journal   1 巻 ( 2 ) 頁: 1-5   2017年9月

  46. Stiffness and Moisture Content Prediction Model of Wooden Veneer Using Fast Online Near-Infrared (NIR) Spectroscopic System 査読有り

    Sofianto, I. A.; Inagaki, T.; Itoh, M.; Tsuchikawa, S.

    Forestry Research and Engineering: International Journal   1 巻 ( 2 ) 頁: 1-5   2017年9月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  47. High spatial resolution and non-destructive evaluation of wood density and microfibril angle by NIR hyperspectral imaging 招待有り

    Ma, T.; Inagaki, T.; Tsuchikawa, S.

      28 巻 ( 5 ) 頁: 7-12   2017年6月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  48. High spatial resolution and non-destructive evaluation of wood density and microfibril angle by NIR hyperspectral imaging

    Ma, T, Inagaki, T, Tsuchikawa, S

    NIR news   28 巻 ( 5 ) 頁: 7-12   2017年6月

  49. Segregating wood wastes by repetitive principal component analysis of near infrared spectra 査読有り

    Kobori Hikaru, Higa Sakura, Tsuchikawa Satoru, Kojima Yoichi, Suzuki Shigehiko

    JOURNAL OF NEAR INFRARED SPECTROSCOPY   25 巻 ( 3 ) 頁: 180 - 187   2017年6月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Near Infrared Spectroscopy  

    To improve the recycling rate of wooden materials, it is necessary to classify wood waste by disposal method and usage. In the industrial manufacture of these materials, rapid and accurate determination of their chemical and physical properties is critical for a stable supply of wood products with reliable quality. In this study, we investigated a discriminant analysis process for waste wood products using hyperspectral imaging with a newly developed repetitive principal component analysis. Hyperspectral images of four types of wood waste (plywood coated with resin, preservative-treated wood, hardwood and softwood) were acquired. The mean spectrum of each sample was extracted from a hypercube in order to build a classification model. A novel classification method based on principal component analysis, named repetitive principal component analysis, was developed. A total of three repetitions of principal component analysis were performed to classify the four types of wood waste. Cross-validated results of repetitive principal component analysis resulted in classifications greater than 85% for any of the four wood waste types. The discriminant model was then applied to single-pixel spectra of the hypercube to form a prediction map. Hyperspectral imaging, with the aid of the new repetitive principal component analysis discriminant analysis, is a powerful tool in wood recycling processes.

    DOI: 10.1177/0967033517714344

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  50. Calibration of SilviScan data of Cryptomeria japonica wood concerning density and microfibril angles with NIR hyperspectral imaging with high spatial resolution 査読有り

    Ma Te, Inagaki Tetsuya, Tsuchikawa Satoru

    HOLZFORSCHUNG   71 巻 ( 4 ) 頁: 341 - 347   2017年4月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Holzforschung  

    Wood density and microfibril angle (MFA) are strongly correlated with wood stiffness, swelling/shrinkage, and its anisotropy. Understanding the spatial distribution of these data is critical for solid timber applications. In this study, near-infrared (NIR) hyperspectral imaging has been calibrated for evaluation of wood density and MFA in an effective manner. Briefly, five wood samples collected from both normal wood (NW) and compression wood (CW) moieties of two different Cryptomeria japonica trees were analyzed. Partial least squares (PLS) regression analysis was performed to determine the relationship between X-ray densitometry data obtained by SilviScan and NIR spectra, and cross-validation (leave-one-out) approach served for prediction performances. The validation coefficient of determination (r2) between the predicted densities by the NIR technique and the X-ray data was 0.83 with a root mean squared error of cross-validation (RMSECV) of 105.2 kg m-3. Regarding MFA, the r2 was 0.77 and RMSECV 5.36°. Wood density was successfully maped as well as the MFA at a high spatial resolution. As a result, the detection of annual growth ring features and evaluation of aspects of heterogeneous wood quality has been facilitated. The mapping results were visually checked by looking at the difference between earlywood (EW) and latewood (LW) for density and by means of the Mäule color reaction indicating high lignin contents in CW in terms of MFA validation as CWs have high MFA values.

    DOI: 10.1515/hf-2016-0153

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  51. Temperature dependence of wood photodegradation monitored by infrared spectroscopy

    Varga, D, Tolvaj, L, Tsuchikawa, S, Bejoc, L, Prekleta, E

    Journal of Photochemistry and Photobiology A: Chemistry   348 巻   頁: 219-225   2017年

  52. Dynamic behavior of wood chemical components under drying process measured by near-infrared spectroscopy 査読有り

    Sugii, S.; Fujimoto, T.; Tsutsumi, H.; Inagaki, T.; Tsuchikawa, S.

    Journal of Near Infrared Spectroscopy   25 巻 ( 6 ) 頁: 400-406   2017年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  53. Temperature dependence of wood photodegradation monitored by infrared spectroscopy 査読有り

    Varga, D., Tolvaj, L.; Tsuchikawa, S.; Bejoc, L.; Prekleta, E.

    Journal of Photochemistry and Photobiology A: Chemistry   348 巻   頁: 219-225   2017年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  54. Segregating wood wastes by repetitive principal component analysis of near infrared spectra 査読有り

    Kobori, H.; Higa, S.; Tsuchikawa, S., Kojima, Y.; Suzuki, S.

    Journal of Near Infrared Spectroscopy   25 巻 ( 3 ) 頁: 180-187   2017年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  55. The effect of path length, light intensity and co-added time on the detection limit associated with NIR spectroscopy of potassium hydrogen phthalate in aqueous solution 査読有り

    Inagaki, T.; Watanabe, T.; Tsuchikawa S.

    PLOS ONE     頁: https://doi.org/10.1371/journal.pone.0176920   2017年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: https://doi.org/10.1371/journal.pone.0176920

  56. Classification of mung bean seeds for sprout production using near-infrared spectroscopy and hyperspectral imaging 査読有り

    Phuangsombut, K.; Terdwongworakul, A.; Suttiwijitpukdee, N.; Phuangsombut A.; Tsuchikawa S.; Inagaki T.; Ma T.

    Thai Society of Agricultural Engineering Journal   23 巻 ( 1 ) 頁: 23-29   2017年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  57. The effect of path length, light intensity and co-added time on the detection limit associated with NIR spectroscopy of potassium hydrogen phthalate in aqueous solution. 査読有り

    Inagaki T, Watanabe T, Tsuchikawa S

    PloS one   12 巻 ( 5 ) 頁: e0176920   2017年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:PLoS ONE  

    Near infrared (NIR) spectroscopy is a common means of non-invasively determining the concentrations of organic compounds in relatively transparent aqueous solutions. Rigorous determination for limit of detection (LOD) is of importance for the application use of NIR spectroscopy. The work reported herein determined the LOD with the analysis of potassium hydrogen phthalate (KHP) in water with partial least square (PLS) calibration in the range of 6300±5800 cm-1 between the two strong absorption bands of water, in which the C-H overtone bands of KHP are located. A comparison of the LOD estimated when using various condition (path length, aperture and co-Added scan times) showed that the lowest LOD for KHP obtained with a fiber optic cable attachment equipped NIR spectrometer is approximately 150 ppm.

    DOI: 10.1371/journal.pone.0176920

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  58. Classification of mung bean seeds for sprout production using near-infrared spectroscopy and hyperspectral imaging

    Phuangsombut, K, Terdwongworakul, A, Suttiwijitpukdee, N, Phuangsombut A, Tsuchikawa S, Inagaki T, Ma T

    Thai Society of Agricultural Engineering Journal   23 巻 ( 1 ) 頁: 23-29   2017年

  59. Dynamic behavior of wood chemical components under drying process measured by near-infrared spectroscopy

    Sugii, S, Fujimoto, T, Tsutsumi, H, Inagaki, T, Tsuchikawa, S

    Journal of Near Infrared Spectroscopy   25 巻 ( 6 ) 頁: 400-406   2017年

  60. Development of Multiple Evaluation Method of Wood Pulp in Paper by Near Infrared Spectroscopy

    Kawabe Chika, Fukasawa Hiroyuki, Inagaki Tetsuya, Tsuchikawa Satoru

    紙パ技協誌   71 巻 ( 3 ) 頁: 326 - 334   2017年

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    出版者・発行元:紙パルプ技術協会  

    <p>Near infrared spectroscopy (NIRS) has been applied in some fields such as medicines, chemicals and ag ricultural products. In this report, NIRS was applied to paper sheets to analyze the contained pulp qualita tively and quantitatively. LBKP, NBKP, CTMP and others could be classified by principal component analysis (PCA) for NIR spectra. The blend ratio of LBKP, NBKP and CTMP in the both mixtures of LBKP and CTMP, and NBKP and CTMP could be determined respectively by partial least squares regression (PLSR)for NIR spectra within the coefficient of determination (R<sup>2 </sup> value) of 0.98. Furthermore, the ratio of mixture of KP and another pulp on the paper could be determined somewhat correctly even if we do not know what kinds of pulp were contained. NIRS could also be used to estimate the drainability of LBKP; that is, the pre dicted value was very close to the measured value. NIRS was also applied to evaluate the degree of degrada tion of pulp. PCA for NIR spectra of LBKP has revealed the linear relationships between recycled times and score.</p><p>The NIR technique is faster than staining techniques, and does not require special training. If we could have tested a wider variety of samples, if we had more time, and if we could have optimized the analysis con dition, it would be possible to estimate more precisely.</p>

    DOI: 10.2524/jtappij.71.326

  61. Segregating wood wastes by repetitive principal component analysis of near infrared spectra

    Kobori, H, Higa, S, Tsuchikawa, S, Kojima, Y, Suzuki, S

    Journal of Near Infrared Spectroscopy   25 巻 ( 3 ) 頁: 180-187   2017年

  62. 近赤外分光法を用いた紙中の木材パルプの複合的評価手法の開発

    河部 千香, 深沢 博之, 稲垣 哲也, 土川 覚

    紙パ技協誌   71 巻 ( 3 ) 頁: 318 - 325   2017年

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    出版者・発行元:紙パルプ技術協会  

    <p>近赤外分光法は食品や薬品などの多くの分野で実用化されている。製紙分野でも古くからオンライン水分計として多くの工場で利用されているが,水分計以外の用途について,まだ広くは利用されていない。</p><p>そこで本研究では,近赤外分光法を用いて木材パルプを中心に,紙に含まれるパルプ繊維を複合的に評価する手法の開発を目指すこととした。試験法として,①産地の異なる広葉樹漂白クラフトパルプ(LBKP)(計8種)と針葉樹漂白クラフトパルプ(NBKP)(計3種),ケミサーモメカニカルパルプ(CTMP)を始めとする様々な種類のパルプ繊維から作製した試料の繊維組成試験,②LBKPのろ水度評価,③LBKPのリサイクル回数の異なる試料のリサイクル回数評価試験を検討した。</p><p>①について,それぞれのパルプ繊維は主成分分析によりはっきりと分離でき,繊維の種類を判別することが可能であることが分かった。検討に用いたパルプ繊維のうち任意の2種を混合した紙の近赤外分光スペクトルをPLS回帰分析すると,含まれているパルプ繊維が分かっていない試料についても定量分析可能であることが分かった。②,③についても,近赤外分光法を適用すれば,今回検討に用いたLBKPに関して,評価可能であることが示された。</p><p>近赤外分光法による定性・定量分析は従来から行われている染色法と比較して,測定時間が短縮でき,経験を積まなくても非破壊で簡便に測定ができる。</p><p>今回,3つの項目をそれぞれ検討したが,これらの手法は解析に用いる水準や測定回数の増加,説明変数に用いる波数帯の最適化,異なる回帰手法の適用などにより,さらに精度が向上し,1度の測定でいくつかの項目が瞬時に評価可能となることも考えられる。より実用化が進めば,近赤外分光法が使用する原料を評価する有効な解析法の一つになりうると期待される。</p>

    DOI: 10.2524/jtappij.1603

  63. Estimation of wood density, moisture content and fiber orientation by THz time domain spectroscopy 査読有り

    Inagaki T., Kashima M., Tsuchikawa S.

    28th International Conference on Wood Science and Technology, ICWST 2017: Implementation of Wood Science in Woodworking Sector     頁: 3 - 6   2017年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:28th International Conference on Wood Science and Technology, ICWST 2017: Implementation of Wood Science in Woodworking Sector  

    Terahertz (THz) radiation has the potential to be a useful tool for sensing and imaging of wood because wood is relatively transparent at these frequencies (below about 1 THz). In this study, demonstration of simultaneous prediction of solid wood density, moisture content and fiber orientation, all of which are critical in manufacturing operations, of 14 species including softwood and hard wood was accomplished using terahertz time-domain spectroscopy (THz-TDS). THz measurements of wood at various moisture contents were taken for 19 orientations of the THz field (0-180o with 10o step) with respect to the visible grain. The real part of refractive index value and absorption cosfficient had strong correlation with density and moisture content of the wood. A strong correlation between measured and predicted values for density and moisture content were observed. The possibility for the estimation of fiber orientation using the birefringence property of wood were shown.

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  64. Coming full circle: back to basics in the application of near infrared spectroscopy to the forest and wood products sector

    Meder Roger, Tsuchikawa Satoru

    JOURNAL OF NEAR INFRARED SPECTROSCOPY   24 巻 ( 6 ) 頁: V - VII   2016年12月

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    出版者・発行元:Journal of Near Infrared Spectroscopy  

    DOI: 10.1255/jnirs.1256

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  65. Determination of optical parameters and moisture content of wood with visible-near infrared spectroscopy 査読有り

    Haddadi Ataollah, Hans Guillaume, Leblon Brigitte, Pirouz Zarin, Tsuchikawa Satoru, Nader Joseph, Groves Kevin

    JOURNAL OF NEAR INFRARED SPECTROSCOPY   24 巻 ( 6 ) 頁: 571 - 585   2016年12月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Near Infrared Spectroscopy  

    We used the Kubelka-Munk theory equations for calculating the absorption coefficient (Kλ), the scattering coefficient (Sλ), the transport absorption (σλa), the reduced scattering coefficient [σλs(1 - g)] and the penetration depth (δλ) from visible-near infrared reflectance spectra acquired over thin samples of quaking aspen and black spruce conditioned at three different moisture levels. The computed absorption and scattering coefficients varied from 0.1 mm-1 to 4.0 mm-1 and from 5.5 mm-1 to 10.0 mm-1, respectively. The absorption coefficients varied according to the absorption band, but the scattering coefficients decreased slowly towards high wavelengths. The sample moisture content was then estimated using the partial least squares (PLS) regression method from the Kλ and/or Sλ spectra, and the resulting PLS models were compared to those obtained with raw and transformed [multiplicative scatter corrected (MSC), first and second derivative] absorption spectra. The best PLS models for black spruce, quaking aspen and both species were obtained when only the 800-1800 nm range was used with the raw or MSC spectra. They led to a root mean square error of cross validation (RMSECV) of 1.40%, 1.09% and 1.23%, respectively, and to a coefficient of determination (RCV2) higher than 0.94. We also found that the Kλ spectra between 800 nm and 1800 nm can provide PLS models having an acceptable accuracy for moisture content estimation (RCV2 = 0.83 and RMSECV = 2.32%), regardless of the species.

    DOI: 10.1255/jnirs.1174

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  66. Optical properties of drying wood studied by time-resolved near-infrared spectroscopy 査読有り

    Konagaya Keiji, Inagaki Tetsuya, Kitamura Ryunosuke, Tsuchikawa Satoru

    OPTICS EXPRESS   24 巻 ( 9 ) 頁: 9561 - 9573   2016年5月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Optics Express  

    We measured the optical properties of drying wood with the moisture contents ranging from 10% to 200%. By using time-resolved near-infrared spectroscopy, the reduced scattering coefficient μs′ and absorption coefficient μa were determined independent of each other, providing information on the chemical and structural changes, respectively, of wood on the nanometer scale. Scattering from dry pores dominated, which allowed us to determine the drying process of large pores during the period of constant drying rate, and the drying process of smaller pores during the period of decreasing drying rate. The surface layer and interior of the wood exhibit different moisture states, which affect the scattering properties of the wood.

    DOI: 10.1364/OE.24.009561

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  67. NIR spectral-kinetic analysis for thermally degraded Sugi (Cryptomeria japonica) wood 査読有り

    Inagaki Tetsuya, Matsuo Miyuki, Tsuchikawa Satoru

    APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING   122 巻 ( 3 )   2016年3月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Physics A: Materials Science and Processing  

    Kinetic analysis was conducted on principal component scores calculated from second-derivative near-infrared (NIR) spectra of thermally treated Sugi (Cryptomeria japonica) wood samples. NIR reflectance spectra were measured for wood samples thermally treated at 90, 120, 150 and 180 °C in an air-circulating oven for periods ranging from 5 min to approximately 1.4 years. The Arrhenius approach, which involves the time–temperature superposition method, is used to understand the change in the principal component score. The master curve corresponded well with the change in principal component scores at each temperature and yielded a determination coefficient between the measured and estimated data of 0.99 for second principal component score. This report shows that kinetic analysis is useful to understand changes in the principal component score calculated from NIR spectra of wood subjected to thermal treatment.

    DOI: 10.1007/s00339-016-9763-x

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  68. Determination of true optical absorption and scattering coefficient of wooden cell wall substance by time-of-flight near infrared spectroscopy 査読有り

    Kitamura Ryunosuke, Inagaki Tetsuya, Tsuchikawa Satoru

    OPTICS EXPRESS   24 巻 ( 4 ) 頁: 3999 - 4009   2016年2月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Optics Express  

    The true absorption coefficient (μa) and reduced scattering coefficient (μ′s) of the cell wall substance in Douglas fir were determined using time-of-flight near infrared spectroscopy. Samples were saturated with hexane, toluene or quinolone to minimize the multiple reflections of light on the boundary between pore-cell wall substance in wood. μ′s exhibited its minimum value when the wood was saturated with toluene because the refractive index of toluene is close to that of the wood cell wall substance. The optical parameters of the wood cell wall substance calculated were μa = 0.030 mm-1 and μ′s = 18.4 mm-1. Monte Carlo simulations using these values were in good agreement with the measured time-resolved transmittance profiles.

    DOI: 10.1364/OE.24.003999

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  69. Three fiber-based diffuse reflectance spectroscopy for estimation of total solid content in natural rubber latex

    Inagaki, T, Nozawa, D, Shimomura, Y, Tsuchikawa S

    Journal of Near Infrared Spectroscopy   24 巻   頁: 327-335   2016年

  70. Three-fibre-based diffuse reflectance spectroscopy for estimation of total solid content in natural rubber latex 査読有り

    Inagaki Tetsuya, Nozawa Daisuke, Shimomura Yoshiaki, Tsuchikawa Satoru

    JOURNAL OF NEAR INFRARED SPECTROSCOPY   24 巻 ( 4 ) 頁: 327 - 335   2016年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Near Infrared Spectroscopy  

    It is shown that three-fibre-based diffuse reflectance spectroscopy, based on spatially resolved near infrared spectroscopy in the wavelength range 850-1060 nm, is a promising method for the measurement of quality in natural rubber latex samples. Absorbance ratios were defined as the ratio of light intensity detected at distances r and r + D from the emitter fibre. A relative absorbance ratio g was then calculated using the absorbance ratios at three wavelengths. Parameter g had a strong linear correlation with total solid content in latex (range 0.3-0.6 g g-1) with a coefficient of determination value of 0.98 and root mean square error for total solid content of 0.014 g g-1. Although the near infrared spectra measured by conventional transmission or reflectance spectroscopy were highly affected by the scattering coefficient in the sample, simulation results in this study showed that the effects of scattering in the samples on g can be reduced.

    DOI: 10.1255/jnirs.1227

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  71. Determination of true optical absorption and scattering coefficient of wooden cell wall substance by time-of-flight near infrared spectroscopy 査読有り

    Kitamura, R.; Inagaki, T.; Tsuchikawa, S.

    Optic Express   24 巻 ( 4 ) 頁: 3999-4009   2016年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  72. Nondestructive inspection of insects in chocolate using near infrared multispectral imaging 査読有り

    Ma, T.; Kobori, H.; Katayama, N.; Tsuchikawa, S.

    Journal of Near Infrared Spectroscopy   24 巻   頁: 391-397   2016年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  73. Three fiber-based diffuse reflectance spectroscopy for estimation of total solid content in natural rubber latex 査読有り

    Inagaki, T.; Nozawa, D.; Shimomura, Y.; Tsuchikawa S.

    Journal of Near Infrared Spectroscopy   24 巻   頁: 327-335   2016年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  74. 近赤外分光法を用いた紙中の木材パルプの複合的評価手法の開発 査読有り

    河部千香、深沢博之、稲垣 哲也、土川 覚

    紙パ技協誌   71 巻 ( 3 ) 頁: 318-325   2016年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  75. Optical properties of drying wood studied by time-resolved near-infrared spectroscopy 査読有り

    Konagaya, K.; Inagaki, T.; Kitamura, R.; Tsuchikawa, S.

    Optic Express   24 巻 ( 9 ) 頁: 9561-9573   2016年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  76. Determination of true optical absorption and scattering coefficient of wooden cell wall substance by time-of-flight near infrared spectroscopy

    Kitamura, R, Inagaki, T, Tsuchikawa, S

    Optic Express   24 巻 ( 4 ) 頁: 3999-4009   2016年

  77. Non-destructive inspection of insects in chocolate using near infrared multispectral imaging 査読有り

    Ma Te, Kobori Hikaru, Katayama Norihisa, Tsuchikawa Satoru

    JOURNAL OF NEAR INFRARED SPECTROSCOPY   24 巻 ( 4 ) 頁: 391 - 397   2016年

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1255/jnirs.1237

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  78. 異分野との接点が生み出す新学問:─近赤外分光計測を例として

    土川 覚

    学術の動向   21 巻 ( 2 ) 頁: 2_66 - 2_71   2016年

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    出版者・発行元:公益財団法人 日本学術協力財団  

    DOI: 10.5363/tits.21.2_66

  79. Optical properties of drying wood studied by time-resolved near-infrared spectroscopy

    Konagaya, K, Inagaki, T, Kitamura, R, Tsuchikawa, S

    Optic Express   24 巻 ( 9 ) 頁: 9561-9573   2016年

  80. 近赤外分光法を用いた紙中の木材パルプの複合的評価手法の開発

    河部千香, 深沢博之, 稲垣 哲也, 土川 覚

    紙パ技協誌   71 巻 ( 3 ) 頁: 318-325   2016年

  81. Combined effects of UV light and elevated temperatures on wood discolouration 査読有り

    Tolvaj Laszlo, Tsuchikawa Satoru, Inagaki Tetsuya, Varga Denes

    WOOD SCIENCE AND TECHNOLOGY   49 巻 ( 6 ) 頁: 1225 - 1237   2015年11月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Wood Science and Technology  

    Two conifers and two deciduous wood species were irradiated by strong UV emitter mercury lamp at elevated temperatures up to 160 °C. Other series of samples were treated in the same chamber at the same temperatures but without light. Results showed that UV light irradiation produced much greater discolouration at elevated temperatures above 80 °C than at ambient temperature. The combined light irradiation and thermal treatment at 160 °C generated much larger discolouration than the sum of the discolouration data caused by UV light irradiation at 30 °C and by pure thermal treatment at 160 °C. The thermal effect during photodegradation was not only the simple addition of two effects, but the elevated temperature multiplied the effect of photodegradation. The greatest difference was shown by the redness change. The Arrhenius plots of all tree colour coordinates had a breaking point close to 100 °C, showing that above this temperature the chemical changes are more complex than below this value.

    DOI: 10.1007/s00226-015-0749-1

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  82. NIR spectroscopic evaluation of nitrogen and carbon content in Japanese Mustard Spinach (Brassica rapa var. perviridis) 査読有り

    Inagaki T., Minagawa C., Yokochi H., Tsuchikawa S.

    2015 54th Annual Conference of the Society of Instrument and Control Engineers of Japan, SICE 2015     頁: 97 - 99   2015年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:2015 54th Annual Conference of the Society of Instrument and Control Engineers of Japan, SICE 2015  

    Demonstration of prediction of carbon and nitrogen content in Japanese Mustard Spinach (Brassica rapa var. perviridis) was accomplished using near infrared (NIR) reflectance spectroscopy. NIR reflectance spectroscopic measurement of hydroponically cultivated fresh leaves growing on stalks were taken at some growing phase. Calibrations were developed for carbon and nitrogen content in leaves using partial least square (PLS) regression method. Strong correlation between measured and predicted value for carbon and nitrogen were observed.

    DOI: 10.1109/SICE.2015.7285393

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  83. A review of recent application of near infrared spectroscopy to wood science and technology 査読有り

    Tsuchikawa Satoru, Kobori Hikaru

    JOURNAL OF WOOD SCIENCE   61 巻 ( 3 ) 頁: 213 - 220   2015年6月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Wood Science  

    This review article introduces recent scientific and technical reports due to near infrared spectroscopy (NIRS) at wood science and technology, most of which was published between 2006 and 2013. Many researchers reported that NIR technique was useful to detect multi traits of chemical, physical, mechanical and anatomical properties of wood materials although it was widely used in a state where characteristic cellular structure was retained. However, we should be sensitive and careful for application of NIRS, when spectra coupled with chemometrics presents unexpected good results (especially, for mechanical physical and anatomical properties). The real application for on-line or at-line monitoring in wood industry is desired as next step. Basic spectroscopic research for wooden material is also progressed. It should be a powerful and meaningful analytical spectroscopic tool.

    DOI: 10.1007/s10086-015-1467-x

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  84. Fast online NIR technique to predict MOE and moisture content of sawn lumber 査読有り

    Kobori Hikaru, Inagaki Tetsuya, Fujimoto Takaaki, Okura Tsutomu, Tsuchikawa Satoru

    HOLZFORSCHUNG   69 巻 ( 3 ) 頁: 329 - 335   2015年4月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Holzforschung  

    A fast online grading apparatus for sawn lumber based on near-infrared (NIR) spectroscopy has been developed. The method is based on a novel wavelength dispersive NIR spectrophotometer equipped with a diffraction grating linear sensor and high-intensity lighting. It was possible to acquire spectra from the entire surface of Hinoki cypress lumber sections traveling on a conveyor belt at a speed of 120 m min<sup>-1</sup>. Additionally, predictive models for moisture content (MC) and modulus of elasticity (MOE) under various MC conditions were developed from the NIR spectra with the aid of partial least squares regression (PLSR) analysis. Both the MC and MOE predictive models demonstrated sufficient levels of prediction accuracy for use on high-speed conveyor belts, and the results of various experiments indicate that the developed device could be applied for the online quality certification of sawn lumber in commercial sawmills.

    DOI: 10.1515/hf-2014-0021

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  85. Construction of a novel densitometer that utilizes a near-infrared laser system with Douglas fir (Pseudotsuga menziesii) 査読有り

    Kitamura Ryunosuke, Tsuchikawa Satoru

    WOOD MATERIAL SCIENCE & ENGINEERING   10 巻 ( 1 ) 頁: 69 - 74   2015年1月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Wood Material Science and Engineering  

    A novel densitometer consisting of a continuous wave near-infrared (NIR) laser source and an avalanche photodiode module as the detector has been designed, which can rapidly and non-destructively measure the density of wood. The wood density of a small area (3.14 mm2) at the radial-transverse face was continuously estimated using the intensity of the transmitted light with the aid of the modified Lambert-Beer law. By conducting a validity evaluation with statistical coefficients, it was shown that the constructed system could obtain the sharp density profile compatible with X-ray densitometer [Root mean squared error of calibration (RMSEC) = 0.045 g cm−3, Root mean squared error of validation (RMSEV) = 0.046 g cm−3). It was concluded that the constructed NIR device has high performance from the viewpoint of operability, measuring time and safety.

    DOI: 10.1080/17480272.2014.968873

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  86. Assessment of variations in air-dry wood density using time-of-flight near-infrared spectroscopy 査読有り

    Hans Guillaume, Kitamura Ryunosuke, Inagaki Tetsuya, Leblon Brigitte, Tsuchikawa Satoru

    WOOD MATERIAL SCIENCE & ENGINEERING   10 巻 ( 1 ) 頁: 57 - 68   2015年1月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Wood Material Science and Engineering  

    Abstract: Non-destructive measurement of wood density using reflectance and transmittance near-infrared spectroscopy (NIRS) has already been reported by several researchers. However, these methods do not allow an independent determination of the spectral contributions of the absorption and scattering effects. In this study, time-of-flight NIRS (TOF-NIRS) was used to measure wood density of seven softwood and hardwood species. A curve fitting procedure was used to resolve the diffusion equation and compute the absorption (µa) and reduced scattering coefficients ((Formula presented.)) from the time-resolved profiles (TRPs) acquired from the wood samples. Statistical parameters were also computed from TRPs and correlated with the wood air-dry density as well as with both optical coefficients. A simple linear regression model was built to relate air-dry wood density to µa (R2 = 0.56, root mean square error [RMSE] = 0.047 g/cm3, p value < 0.05). Results obtained were in good agreement with the modified Beer–Lambert law for turbid media. The square root of the (Formula presented.) / (Formula presented.) ratio (which was well correlated with the photons mean path length) was used to correct for the distortion due to scattering in absorbance NIR spectra acquired using reflectance spectroscopy. This research demonstrates the potential of TOF-NIRS to assess wood density and to correct reflectance spectra for scattering effects.

    DOI: 10.1080/17480272.2014.923937

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  87. Visualisation of spatial distribution of moisture content and basic density using near-infrared hyperspectral imaging method in sugi (Cryptomeria japonica) 査読有り

    Fujimoto T., Numal T., Kobori H., Tsuchikawa S.

    INTERNATIONAL WOOD PRODUCTS JOURNAL   6 巻 ( 2 ) 頁: 46 - 48   2015年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:International Wood Products Journal  

    This study quantified the spatial distribution of moisture content and basic density within Cryptomeria japonica branches using near-infrared (NIR) hyperspectral imaging and multivariate data analysis techniques. The hyperspectral data for wood disk samples were acquired using a Compovision NIR Composition Imaging System (Sumitomo Electric Industries, Ltd., Yokohama, Japan) with a spectral range of 913-2519 nm. The calibration models for prediction of moisture content and basic density were developed using partial least squares (PLS) regression analysis. The PLS model for moisture content and basic density showed good predictive performance with coefficients of determination 0.82 (RMSEP512.4%) and 0.84 (RMSEP528.0 kg m<sup>-3</sup>) respectively. The spatial distribution of predicted moisture content clearly detected the low moisture white zone surrounding the heartwood. The high density compression wood could be also visualised with the NIR hyperspectral imaging technique. The results presented here provide useful information for development of a novel log sorting method.

    DOI: 10.1179/2042645314Y.0000000084

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  88. Determination of optical parameters and moisture content of wood with visible-NIR spectroscopy 査読有り

    Haddadi, A; Hans, G.; Leblon, B.; Pirouz, Z.; Tsuchikawa, S.; Nader, J.; and Groves, K.

    Journal of Near Infrared Spectroscopy     2015年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: doi: 10.1255/jnirs.1174

  89. Combined effects of UV light and elevated temperatures on wood discolouration 査読有り

    Tolvaj, L.; Tsuchikawa, S.; Inagaki T.; Varga, D.

    Wood Science and Technology   49 巻 ( 6 ) 頁: 1225-1237   2015年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  90. A Review of Recent Application of Near Infrared Spectroscopy to Wood Science and Technology 招待有り 査読有り

    Tsuchikawa, S.; Kobori, H.

    Journal of Wood Science   61 巻   頁: 213-230   2015年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  91. A Review of Recent Application of Near Infrared Spectroscopy to Wood Science and Technology

    Tsuchikawa, S, Kobori, H

    Journal of Wood Science   61 巻   頁: 213-230   2015年

  92. Combined effects of UV light and elevated temperatures on wood discolouration

    Tolvaj, L, Tsuchikawa, S, Inagaki T, Varga, D

    Wood Science and Technology   49 巻 ( 6 ) 頁: 1225-1237   2015年

  93. NIR spectroscopic evaluation of nitrogen and carbon content in Japanese Mustard Spinach (Brassica rapa var. perviridis)

    Inagaki Tetsuya, Minagawa Chinatsu, Yokochi Hideyuki, Tsuchikawa Satoru

    2015 54TH ANNUAL CONFERENCE OF THE SOCIETY OF INSTRUMENT AND CONTROL ENGINEERS OF JAPAN (SICE)     頁: 97 - 99   2015年

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  94. Visualisation of degree of acetylation in beechwood by near infrared hyperspectral imaging 査読有り

    Inagaki Tetsuya, Mitsui Katsuya, Tsuchikawa Satoru

    JOURNAL OF NEAR INFRARED SPECTROSCOPY   23 巻 ( 6 ) 頁: 353 - 360   2015年

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    掲載種別:研究論文(学術雑誌)  

    DOI: 10.1255/jnirs.1181

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  95. Simultaneous prediction of density and moisture content of wood by terahertz time domain spectroscopy

    Inagaki, T.; Ahmed, B.; Hartley, I. D.; Tsuchikawa, S.; Reid, M.

    Journal of Infrared, Millimeter, and Terahertz Waves   35 巻 ( 11 ) 頁: 949-961   2014年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  96. Simultaneous prediction of density and moisture content of wood by terahertz time domain spectroscopy

    Inagaki, T, Ahmed, B, Hartley, I. D, Tsuchikawa, S, Reid, M

    Journal of Infrared, Millimeter, and Terahertz Waves   35 巻 ( 11 ) 頁: 949-961   2014年11月

  97. Simultaneous prediction of density and moisture content of wood by terahertz time domain spectroscopy 査読有り

    Inagaki Tetsuya, Ahmed Belal, Hartley Ian D., Tsuchikawa Satoru, Reid Matthew

    JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES   35 巻 ( 11 ) 頁: 949 - 961   2014年11月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Infrared, Millimeter, and Terahertz Waves  

    In this study, demonstration of simultaneous prediction of solid wood density and moisture content, both of which are critical in manufacturing operations, of 4 species (Aspen, Birch, Hemlock and Maple) was accomplished using terahertz time-domain spectroscopy (THz-TDS). THz measurements of wood at various moisture contents were taken for two orientations of the THz field (parallel and perpendicular) with respect to the visible grain. The real and imaginary parts of the dielectric function averaged over the frequency range of 0.1 to 0.2 THz had strong correlation with density and moisture content of the wood. We extend a model that has been applied previously to oven-dry wood to include the effects of moisture below the fiber saturation point by combining two effective medium models, which allows the dielectric function of water, air and oven-dry cell wall material to be modeled to give an effective dielectric function for the wood. A strong correlation between measured and predicted values for density and moisture content were observed.

    DOI: 10.1007/s10762-014-0095-7

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  98. Prediction of oven-dry density of wood by time-domain terahertz spectroscopy 査読有り

    Inagaki Tetsuya, Hartley Ian D., Tsuchikawa Satoru, Reid Matthew

    HOLZFORSCHUNG   68 巻 ( 1 ) 頁: 61 - 68   2014年1月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Holzforschung  

    Wood is relatively transparent to terahertz (THz) radiation with wavelengths in the submillimeter range. This radiation has a high potential for sensing and imaging wood with a good spatial resolution. THz is especially sensitive to moisture content, fiber alignment, and density - all of which are critical in the manufacturing of wood products. In this work, a systematic study was undertaken on 46 very different wood species by means of THz time-domain spectroscopy with density determination in focus. The dielectric response of wood was modeled based on the Maxwell-Garnett effective medium theory. The dielectric function of the cell wall material was found to be extremely consistent over this large number of species with very different properties. This renders possible to determine wood density by THz time-domain spectroscopy. A strong correlation between the measured and predicted densities has been observed for all the samples investigated. © 2014 Walter de Gruyter GmbH, Berlin/Boston.

    DOI: 10.1515/hf-2013-0013

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  99. Mapping of Leaf Water Content Using Near-Infrared Hyperspectral Imaging 査読有り

    Higa Sakura, Kobori Hikaru, Tsuchikawa Satoru

    APPLIED SPECTROSCOPY   67 巻 ( 11 ) 頁: 1302 - 1307   2013年11月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Spectroscopy  

    In this study, near-infrared hyperspectral imaging was applied to predict the water content of golden pothos (Epipremnum aureum) leaves, after which partial least squares regression (PLSR) analysis was performed to predict their averaged water content. The resulting predictive model was then applied to each single-pixel spectra in order to construct a water content image that could be used to evaluate the model's applicability to the single-pixel spectra through partial least squares score comparisons between the averaged spectra used for calibration and the single-pixel spectra. In the next phase, it was determined that a rebuilt PLSR predictive model based on the averaged spectra of an applicable pixel showed higher prediction accuracy than that of the original model. This study provides effective information about the limitations of prediction mapping and the optimization of pixel selections for better calibrations. © 2013 Society for Applied Spectroscopy.

    DOI: 10.1366/13-07028

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  100. A Review of Recent Near-Infrared Research for Wood and Paper (Part 2) 査読有り

    Tsuchikawa Satoru, Schwanninger Manfred

    APPLIED SPECTROSCOPY REVIEWS   48 巻 ( 7 ) 頁: 560 - 587   2013年10月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Spectroscopy Reviews  

    This review article introduces recent technical and scientific reports on near-infrared (NIR) spectroscopy in the wood and paper industry, which have increased during the last decade. Many researchers have reported that the NIR technique is useful for detection of both chemical and physical properties of wood materials and has been widely used in cases where the characteristic cellular structure of the material is retained. With regard to application of NIR spectroscopy to pulp and paper, many publications have reported its potential as an on-line measurement technique during paper-making process control. NIR spectroscopy is considered fundamental in applied research on wood and paper. Utilization of NIR spectroscopy in the wood and paper industry should take into account its applicability and limitations as a nondestructive technique. © 2013 Copyright Taylor and Francis Group, LLC.

    DOI: 10.1080/05704928.2011.621079

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  101. Prediction of dry veneer stiffness using near infrared spectra from transverse section of green log 査読有り

    Fujimoto Takaaki, Kawakami Keisuke, Aimi Haruhisa, Shimizu Jun-ichi, Hasegawa Koichi, Kobori Hikaru, Tsuchikawa Satoru

    JOURNAL OF WOOD SCIENCE   59 巻 ( 5 ) 頁: 383 - 388   2013年10月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Wood Science  

    This study examined the feasibility of near infrared spectroscopy as a novel technique for log assessment on the basis of wood property. Near infrared (NIR) spectra were obtained from the transverse section of green log and multivariate regression analysis was carried out to predict the stiffness of veneer processed from the log. The stiffness of the veneer was dynamic modulus of elasticity measured using ultrasonic method. The calibrations of veneer stiffness had moderate relationships between measured and NIR-predicted values, with regression coefficients ranging from 0.84 to 0.88. The calibration equations were applied to the test set and it was found that predictions were also well fitted, with regression coefficients ranging from 0.67 to 0.89. The results indicate that the variation of wood stiffness within the logs could be assessed using the NIR spectra from the cross-section of logs. The spectra were obtained from green condition of the log and the stiffness of veneer was measured after kiln drying. Thus, the results imply that the wood stiffness in dry condition could be predicted using the spectra collected from green logs. If the models obtained in this study put into the imaging system, the two-dimensional map of the stiffness would be visualized on the cross-section of logs. The NIR spectroscopy coupled with imaging system could compensate the weak point of the traditional methods for log assessment. © 2013 The Japan Wood Research Society.

    DOI: 10.1007/s10086-013-1352-4

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  102. Near-infrared spectroscopy and the forest products industry 査読有り

    Leblon B., Tsuchikawa S.

    Forestry Chronicle   89 巻 ( 5 ) 頁: 575 - 576   2013年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Forestry Chronicle  

    DOI: 10.5558/tfc2013-103

    Scopus

  103. Time-Resolved Principal Component Imaging Analysis of Chlorophyll Fluorescence Induction for Monitoring Leaf Water Stress 査読有り

    Kobori Hikaru, Tsuchikawa Satoru

    APPLIED SPECTROSCOPY   67 巻 ( 6 ) 頁: 594 - 599   2013年6月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Spectroscopy  

    Chlorophyll fluorescence induction is widely applied to investigate plant growth conditions by calculating the ratio of its intensity at oxidized and reduced states. We examined the applicability of a time-resolved profile of chlorophyll fluorescence induction with the aid of multivariate analysis to monitor the leaf water stress. Principal component (PC) analysis of timeresolved images of chlorophyll fluorescence induction and their score images were reconstructed. Control leaves (non-stressed leaves) and water-stressed leaves could be classified by normalized PC3 score images. This technique has the potential to monitor the water stress condition of plants by using a simple device. © 2013 Society for Applied Spectroscopy.

    DOI: 10.1366/12-06850

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    PubMed

  104. Time-of-flight Near-infrared Spectroscopy for Nondestructive Measurement of Internal Quality in Grapefruit

    Kurata Yohei, Tsuchida Tomoe, Tsuchikawa Satoru

    JOURNAL OF THE AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE   138 巻 ( 3 ) 頁: 225 - 228   2013年5月

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  105. Time-of-flight near-infrared spectroscopy for nondestructive measurement of internal quality in grapefruit 査読有り

    Kurata Y., Tsuchida T., Tsuchikawa S.

    Journal of the American Society for Horticultural Science   138 巻 ( 3 ) 頁: 225 - 228   2013年5月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of the American Society for Horticultural Science  

    We proposed a technique combining time-of-flight (TOF) and near-infrared spectroscopy (NIRS), termed TOF-NIRS, capable of measuring the time-resolved profiles of near-infrared (NIR) light with nanosecond resolution. Analysis of the variation in time-resolved profiles was used to estimate soluble solids concentration (SSC) and acidity in grapefruit (Citrus paradisi)*and the prediction accuracy was compared with the conventional NIR measurement device. In data processing*the cross-correlation function*which evaluated the similarity between the reference and transmitted beams*was introduced as an explanatory variable for partial least squares regression. TOF-NIRS predicted both SSC and acidity in grapefruit with higher precision than the conventional NIR measurement with respective r values of 0.72 and 0.85. Specifically*the superiority of TOF-NIRS was attributed to measurement time and prediction accuracy in determining acidity.

    DOI: 10.21273/jashs.138.3.225

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  106. Applicability of Vis-NIR hyperspectral imaging for monitoring wood moisture content (MC) 査読有り

    Kobori Hikaru, Gorretta Nathalie, Rabatel Gilles, Bellon-Maurel Veronique, Chaix Gilles, Roger Jean-Michel, Tsuchikawa Satoru

    HOLZFORSCHUNG   67 巻 ( 3 ) 頁: 307 - 314   2013年4月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Holzforschung  

    Visible-near-infrared hyperspectral imaging was tested for its suitability for monitoring the moisture content (MC) of wood samples during natural drying. Partial least-squares regression (PLSR) prediction of MC was performed on the basis of average reflectance spectra obtained from hyperspectral images. The validation showed high prediction accuracy. The results were compared concerning the PLSR prediction of MC mapping from raw spectra and standard normal variate (SNV) treatment. SNV pretreatment leads to the best results for visualizing the MC distribution in wood. Hyperspectral imaging has a high potential for monitoring the water distribution of wood.

    DOI: 10.1515/hf-2012-0054

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  107. High accuracy rapid prediction and feasibility of on-site nondestructive estimation of Para rubber quality by spectroscopic methods 査読有り

    Inagaki Tetsuya, Sirisomboon Panmanas, Liu Chang, Thanapase Warunee, Tsuchikawa Satoru

    JOURNAL OF WOOD SCIENCE   59 巻 ( 2 ) 頁: 119 - 126   2013年4月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Wood Science  

    The aim of this study was to investigate convenient spectroscopic evaluation method of Para rubber quality. Ultra violet-near infrared (UV-NIR 370-1085 nm) spectra of latex were measured in transmittance mode. Calibrations for total solid content (TSC) and dry rubber content (DRC) were developed using spectral data set with aid of partial least square regression analysis using 57 samples. UV-NIR spectra of latex provided good regression models between measured and predicted values of TSC and DRC with determination coefficient for cross-validation of 0. 96 and 0. 97, respectively. The ranks were 2 and 1, respectively. This study suggests high accuracy in-line quality control of latex using UV-NIR spectroscopy. The long wavelength NIR spectra of bark were scanned to check the feasibility of on-site evaluation of latex quality by measuring the NIR spectra of standing tree. From the observation of near infrared spectra, it was shown that there was more latex signal in outer part of wood bark than in inner part of wood bark. This result suggests that the focal point should be on the outer part of bark to get the signal of latex when we measure the spectra of standing tree. © 2012 The Japan Wood Research Society.

    DOI: 10.1007/s10086-012-1305-3

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  108. High accuracy rapid prediction and feasibility of on-site nondestructive estimation of Para rubber quality by spectroscopic method 査読有り

    Inagaki, T.; Sirisomboon, P.; Liu, C.; Thanapase, W.; Tsuchikawa, S.

    Journal of Wood Science   59 巻   頁: 119-126   2013年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  109. Applicability of Vis-NIR hyperspectral imaging for monitoring wood moisture content (MC) 査読有り

    Kobori, H.; Gorretta, N.; Rabatel, G.; Bellon-Maurel, V.; Chaix, G.; Roger, J.-M.; Tsuchikawa, S.

    Holzforschung   67 巻 ( 3 ) 頁: 307-314   2013年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  110. Establishment of near infrared archaeometry 招待有り 査読有り

    Inagaki, T.; Tsuchikawa, S.

    NIR News   24 巻 ( 7 ) 頁: 4-6   2013年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  111. Mapping of Leaf Water Content Using Near-Infrared Hyperspectral Imaging", Applied Spectroscopy 査読有り

    Higa, S.; Kobori, H.; Tsuchikawa, S.

    Applied Spectroscopy   67 巻 ( 11 ) 頁: 1302-1307   2013年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  112. A review of near-infrared spectroscopy for monitoring moisture content and density of solid wood 査読有り

    Leblon, B.; Adedipe, O.; Hans, G.; Haddadi1, A.; Tsuchikawa, S.; Burger; J.; Stirling, R; Pirouz, Z.; Groves, K.; Nader, J.; LaRocque, A.

    The Forestry Chronicle   89 巻 ( 5 ) 頁: 595-606   2013年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  113. Vis-NIR Spectroscopy for the On-site Prediction of Wood Properties 査読有り

    Kobori, H.; Kojima, M.; Yamamoto, H.; Sasaki, Y.; Yamaji, F. M.; Tsuchikawa, S.

    The Forestry Chronicle   89 巻 ( 5 ) 頁: 36-43   2013年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  114. Time-Resolved Principal Component Imaging Analysis of Chlorophyll Fluorescence Induction for Monitoring Leaf Water Stress 査読有り

    Kobori, H.; Tsuchikawa, S.

    Applied Spectroscopy   67 巻 ( 6 ) 頁: 594-599   2013年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  115. A Review of Recent Near Infrared Research for Wood and Paper Part 2 招待有り 査読有り

    Tsuchikawa, S.; Schwanninger, S.

    Applied Spectroscopy Review   48 巻   頁: 560-587   2013年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  116. Time of Flight Near Infrared Spectroscopy for Nondestructive Measurement of internal quality in Grapefruit 査読有り

    Kurata, Y.; Tsuchida, T.; Tsuchikawa, S.

    Journal of American Society of Horticultural Science   138 巻   頁: 225-228   2013年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  117. Prediction of wood density using near infrared-based partial least squares regression models calibrated with X-ray microdensity

    Rodrigues, J. C.; Fujimoto, T.; Schwanninger, M.; Tsuchikawa, S.

    NIR News   24 巻 ( 2 ) 頁: 4-5,8   2013年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  118. Time of Flight Near Infrared Spectroscopy for Nondestructive Measurement of internal quality in Grapefruit

    Kurata, Y, Tsuchida, T, Tsuchikawa, S

    Journal of American Society of Horticultural Science   138 巻   頁: 225-228   2013年

  119. Time-Resolved Principal Component Imaging Analysis of Chlorophyll Fluorescence Induction for Monitoring Leaf Water Stress

    Kobori, H, Tsuchikawa, S

    Applied Spectroscopy   67 巻 ( 6 ) 頁: 594-599   2013年

  120. Vis-NIR spectroscopy for the on-site prediction of wood properties 査読有り

    Kobori Hikaru, Kojima Miho, Yamamoto Hiroyuki, Sasaki Yasutoshi, Yamaji Fabio Minoru, Tsuchikawa Satoru

    FORESTRY CHRONICLE   89 巻 ( 5 ) 頁: 631 - 638   2013年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Forestry Chronicle  

    We investigated the feasibility of visible-near-infrared (Vis-NIR) spectroscopy for estimation of wood qualities of fast-growing Eucalyptus grandis. Partial least squares regression (PLSR) models are applied to predict the diameter at the breast height (DBH), lateral growth rate (LGR) and propagation velocity of stress waves (PVSW). It was possible to estimate LGR and PVSW with appropriate accuracy. This suggested that perhaps information in terms of maturation is included in Vis-NIR spectra. The key factors in the validation of PVSW and LGR were the water and cellulose condition in wood.

    DOI: 10.5558/tfc2013-114

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  121. Vis-NIR Spectroscopy for the On-site Prediction of Wood Properties

    Kobori, H, Kojima, M, Yamamoto, H, Sasaki, Y, Yamaji, F. M, Tsuchikawa, S

    The Forestry Chronicle   89 巻 ( 5 ) 頁: 36-43   2013年

  122. A review of near-infrared spectroscopy for monitoring moisture content and density of solid wood

    Leblon, B, Adedipe, O, Hans, G, Haddadi1, A, Tsuchikawa, S, Burger; J, Stirling, R, Pirouz, Z, Groves, K, Nader, J, LaRocque, A

    The Forestry Chronicle   89 巻 ( 5 ) 頁: 595-606   2013年

  123. Applicability of Vis-NIR hyperspectral imaging for monitoring wood moisture content (MC)

    Kobori, H, Gorretta, N, Rabatel, G, Bellon-Maurel, V, Chaix, G, Roger, J.-M, Tsuchikawa, S

    Holzforschung   67 巻 ( 3 ) 頁: 307-314   2013年

  124. A Review of Recent Near Infrared Research for Wood and Paper Part 2

    Tsuchikawa, S, Schwanninger, S

    Applied Spectroscopy Review   48 巻   頁: 560-587   2013年

  125. A review of near-infrared spectroscopy for monitoring moisture content and density of solid wood 査読有り

    Leblon Brigitte, Adedipe Oluwatosin, Hans Guillaume, Haddadi Ataollah, Tsuchikawa Satoru, Burger James, Stirling Rod, Pirouz Zarin, Groves Kevin, Nader Joseph, LaRocque Armand

    FORESTRY CHRONICLE   89 巻 ( 5 ) 頁: 595 - 606   2013年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Forestry Chronicle  

    This review article examines past and current research on the application of near-infrared (NIR) reflectance/transmittance spectroscopy (NIRS) for real-time monitoring of moisture content and density of solid wood Most of the applications of NIRS on solid wood have focussed on the application of multivariate statistics as exploratory tools for the prediction of physical, chemical and mechanical properties, such as moisture content, density, stiffness, cellulose and lignin content. However, very few studies on the development of optical models and the use of NIRS transmittance techniques on solid wood have been reported. NIRS technology has the potential to be used as a rapid tool that could be employed for at-line measurement and monitoring of wood properties in the forest products industry.

    DOI: 10.5558/tfc2013-111

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  126. Establishment of near infrared archaeometry

    Inagaki, T, Tsuchikawa, S

    NIR News   24 巻 ( 7 ) 頁: 4-6   2013年

  127. La spectroscopie proche infrarouge et le secteur des produits forestiers

    Leblon Brigitte, Tsuchikawa Satoru

    FORESTRY CHRONICLE   89 巻 ( 5 ) 頁: 575 - 576   2013年

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  128. High accuracy rapid prediction and feasibility of on-site nondestructive estimation of Para rubber quality by spectroscopic method

    Inagaki, T, Sirisomboon, P, Liu, C, Thanapase, W, Tsuchikawa, S

    Journal of Wood Science   59 巻   頁: 119-126   2013年

  129. Mapping of Leaf Water Content Using Near-Infrared Hyperspectral Imaging", Applied Spectroscopy

    Higa, S, Kobori, H, Tsuchikawa, S

    Applied Spectroscopy   67 巻 ( 11 ) 頁: 1302-1307   2013年

  130. Prediction of wood density using near infrared-based partial least squares regression models calibrated with X-ray microdensity

    Rodrigues, J. C, Fujimoto, T, Schwanninger, M, Tsuchikawa, S

    NIR News   24 巻 ( 2 ) 頁: 4-5,8   2013年

  131. Near-Infrared Spectroscopy and the Forest Products Industry

    Leblon Brigitte, Tsuchikawa Satoru

    FORESTRY CHRONICLE   89 巻 ( 5 ) 頁: 575 - 575   2013年

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  132. Rapid Prediction of Past Climate Condition from Lake Sediments by Near-Infrared (NIR) Spectroscopy 査読有り

    Inagaki Tetsuya, Shinozuka Yoshitsugu, Yamada Kazuyoshi, Yonenobu Hitoshi, Hayashida Akira, Tsuchikawa Satoru, Yoshida Akihiro, Hoshino Yasuharu, Gotanda Katsuya, Yasuda Yoshinori

    APPLIED SPECTROSCOPY   66 巻 ( 6 ) 頁: 673 - 679   2012年6月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Spectroscopy  

    This study explored the feasibility of rapid, nondestructive near-infrared (NIR) reflection spectroscopy for the prediction of conventional physical properties, carbon-nitrogen-sulfur (CNS) analysis, and concentration of inorganic components in sediment cores from a brackish lake. A long core sample, which consisted of well-preserved annually formed lamina from Lake Ogawara along the Pacific coast in Aomori Prefecture, northeastern Japan, was used to investigate the past environmental record. The core was previously analyzed for physical properties, CNS, and inorganic components. Calibration models were developed from NIR reflection spectra of 149 core samples. Partial least squares (PLS) analysis provided good regression models between measured and predicted values for water content, total nitrogen (TN), total organic carbon (TOC), total sulfur (TS), Al 2O 3, S/Al 2O 3, Fe 2O 3/Al 2O 3, Sc/Al 2O 3, Cu/Al 2O 3, and Zn/Al 2O 3 with coefficients of determination (r 2) for cross-validation of 0.73, 0.89, 0.88, 0.73, 0.92, 0.81, 0.82, 0.75, 0.82, and 0.82, respectively. The variation of predicted component values as a function of depth showed the same trend as that of conventionally measured values. This study also showed the possibility of NIR spectroscopy as an on-site, rapid analytical tool for the identification of tephra (fragmental material produced by a volcanic eruption regardless of composition, fragment size, or emplacement mechanism), which is important for dating. © 2012 Society for Applied Spectroscopy.

    DOI: 10.1366/11-06418

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  133. リグナ・ハノーバー2011名古屋大学ブース出展報告

    土川 覚

    木材工業 = Wood industry   67 巻 ( 2 ) 頁: 81 - 84   2012年2月

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    出版者・発行元:日本木材加工技術協会  

  134. Eucalyptus camaldulensis density and fiber length estimated by near-infrared spectroscopy 査読有り

    Inagaki Tetsuya, Schwanninger Manfred, Kato Reina, Kurata Yohei, Thanapase Warunee, Puthson Pratuang, Tsuchikawa Satoru

    WOOD SCIENCE AND TECHNOLOGY   46 巻 ( 1-3 ) 頁: 143 - 155   2012年1月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Wood Science and Technology  

    Density and fiber length belong to the parameters that are used by the pulping industry as indicators of wood quality for different industrial processes and final paper products. The feasibility of Fourier transform near-infrared (FT-NIR) spectroscopy for the non-destructive evaluation of fiber length and air-dry density of fast-growing E. camaldulensis from Thailand was investigated using 50 samples. NIR spectra taken from solid wood and air-dry density as well as fiber length were used for partial least squares (PLS) regression analyses. It is the first time that the fiber length of E. camaldulensis solid wood could be predicted with high accuracy and precision and that the ratios of performance to deviation (RPD) obtained are the first that fully fulfill the requirements of AACC Method 39-00 (AACC 1999) for screening in breeding programs (RPD ≥ 2.5). The RPDs for cross-validation (test set validation) of the NIR-PLS-R models of 3.3 (3.8) for air-dry density and 3.5 (3.9) for fiber length allow drawing the conclusion that the models are at least applicable for screening in breeding programs as they lie in-between screening (RPD ≥ 2.5) and quality control (RPD ≥ 5). Even when 40% of the samples were removed in cross-validation of the air-dry density model, the RPD is 3.2, which confirms that the model is robust, stable, and well qualified for prediction. The good model statistics obtained in this study might be due to the fact that measurement sites for the measurement of NIR spectra, air-dry density, and fiber lengths were strictly coincided. © 2010 Springer-Verlag.

    DOI: 10.1007/s00226-010-0379-6

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  135. リグナ・ハノーバー2011名古屋大学ブース出展報告 招待有り 査読有り

    土川 覚

    木材工業   67 巻 ( 2 ) 頁: 81-84   2012年

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    担当区分:筆頭著者   記述言語:日本語  

  136. 広帯域分光方式による革新的な木材多形質高速非破壊測定装置の開発 招待有り

    土川 覚

    Techno Innovation   84 巻   頁: 19-23   2012年

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    担当区分:筆頭著者   記述言語:日本語  

  137. Prediction of wood density independent of moisture conditions using near infrared spectroscopy

    Fujimoto, T.; Kobori, H.; Tsuchikawa, S.

    Journal of Near Infrared Spectroscopy   20 巻 ( 3 ) 頁: 353-359   2012年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  138. Rapid prediction of past climate condition from lake sediments by NIR spectroscopy 査読有り

    Inagaki, T.; Shinozuka, Y.; Yamada, K.; Yonenobu, H.; Tsuchikawa, S.; Yoshida, A.; Hoshino, Y.; Gotanda, K.; Yasuda, Y.

    Applied Spectroscopy   66 巻 ( 6 ) 頁: 673-679   2012年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  139. Eucalyptus camaldulensis density and fiber length estimated by near infrared spectroscopy 査読有り

    Inagaki, T.; Schwanninger, S.; Kato, R.; Kurata1, Y.; Thanapase, W.; Puthson, P.; Tsuchikawa, S.

    Wood Science and Technology   46 巻   頁: 143-155   2012年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  140. リグナ・ハノーバー2011名古屋大学ブース出展報告

    土川 覚

    木材工業   67 巻 ( 2 ) 頁: 81-84   2012年

  141. 広帯域分光方式による革新的な木材多形質高速非破壊測定装置の開発

    土川 覚

    Techno Innovation   84 巻   頁: 19-23   2012年

  142. Eucalyptus camaldulensis density and fiber length estimated by near infrared spectroscopy

    Inagaki, T, Schwanninger, S, Kato, R, Kurata1, Y, Thanapase, W, Puthson, P, Tsuchikawa, S

    Wood Science and Technology   46 巻   頁: 143-155   2012年

  143. Prediction of wood density independent of moisture conditions using near infrared spectroscopy

    Fujimoto, T, Kobori, H, Tsuchikawa, S

    Journal of Near Infrared Spectroscopy   20 巻 ( 3 ) 頁: 353-359   2012年

  144. Rapid prediction of past climate condition from lake sediments by NIR spectroscopy

    Inagaki, T, Shinozuka, Y, Yamada, K, Yonenobu, H, Tsuchikawa, S, Yoshida, A, Hoshino, Y, Gotanda, K, Yasuda, Y

    Applied Spectroscopy   66 巻 ( 6 ) 頁: 673-679   2012年

  145. Prediction of wood density independently of moisture conditions using near infrared spectroscopy 査読有り

    Fujimoto Takaaki, Kobori Hikaru, Tsuchikawa Satoru

    JOURNAL OF NEAR INFRARED SPECTROSCOPY   20 巻 ( 3 ) 頁: 353 - 359   2012年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Near Infrared Spectroscopy  

    Near infrared (NIR) spectra obtained from 100 Japanese larch (Larix kaempferi) wood samples containing various amounts of moisture were used to examine the effect of moisture conditions on the accuracy of predicting wood density. Partial least squares regression (PLS-R) analysis was performed to predict wood density under air dry (DEN-ar), water impregnated (DEN-wi) and oven dry (DEN-ov) conditions. The NIR spectra varied with the moisture conditions of the wood, where the characteristic absorbance bands in the vicinity of 7320 cm-1 (1366 nm), 7160 cm-1 (1400 nm) and 7000 cm -1 (1428 nm) were related to cellulose and water. The spectral differences between high- and low-density samples varied depending on the moisture conditions; high-density samples showed low absorbance values at 7160 cm-1 when wet and showed high absorbance values at 7320 cm -1 and 7000 cm-1 when dry. DEN-ar, DEN-wi and DEN-ov could be predicted using spectra collected from the corresponding moisture conditions [coefficient of determination (R2) = 0.79-0.89; standard error of prediction (SEP) = 24-26 kg m-3]. Prediction of DEN-ar and DEN-ov could also be achieved using spectra collected from various moisture conditions (R2 = 0.86-0.87, SEP = 22 kg m-3). The loadings from PLS-R analysis indicated that the absorption bands in the vicinity of 7320 cm -1, 7160 cm-1 and 7000 cm-1 played an important role in predicting wood density. NIR spectroscopy has the potential to predict wood density independently of the moisture content of the sample. © 2012 IM Publications LLP. All rights reserved.

    DOI: 10.1255/jnirs.994

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  146. 近赤外分光法による木質材料の非破壊計測 : 現状と展望

    土川 覚

    木材工業 = Wood industry   66 巻 ( 10 ) 頁: 430 - 435   2011年10月

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    出版者・発行元:日本木材加工技術協会  

  147. Optical characteristics of wood investigated by time-of-flight near infrared spectroscopy 査読有り

    Kurata Yohei, Fujimoto Takaaki, Tsuchikawa Satoru

    HOLZFORSCHUNG   65 巻 ( 3 ) 頁: 389 - 395   2011年5月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Holzforschung  

    A new optical measurement system, the main components of which are a diode-pumped solid state laser and avalanche photodiodes, was introduced to clarify the optical characteristics of wood from the viewpoint of time-of-flight near infrared spectroscopy. The sample thickness and the wavelength of input pulsed laser clearly influenced the transmitted time-resolved profile. The effective optical path length became 15 times longer than the sample thickness. The optical model based on the diffusion approximation to the radiative transfer equation proved to be useful for thick samples, which can be optically regarded as an ideal diffuser, although wood is a structural material with non-homogeneous cellular structure. © 2011 by Walter de Gruyter Berlin New York.

    DOI: 10.1515/HF.2011.034

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  148. Optical characteristics of wood investigated by time-of-flight near infrared spectroscopy 査読有り

    Kurata, Y., Fujimoto, T., Tsuchikawa S.

    Holzforschung   65 巻   頁: 389-395   2011年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  149. 近赤外分光法による木質材料の非破壊計測 -現状と展望- 招待有り 査読有り

    土川 覚

    木材工業   66 巻 ( 10 ) 頁: 430-435   2011年

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    担当区分:筆頭著者   記述言語:日本語  

  150. Application of NIR spectroscopy to wood products

    Tsuchikawa S.; Fujimoto, T.

    Proceedings of 17th International Nondestructive Testing and Evaluation of Wood Symposium     頁: 665-671   2011年

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    記述言語:英語  

  151. Application of NIR spectroscopy to wood products

    Tsuchikawa S, Fujimoto, T

    Proceedings of 17th International Nondestructive Testing and Evaluation of Wood Symposium     頁: 665-671   2011年

  152. Optical characteristics of wood investigated by time-of-flight near infrared spectroscopy

    Kurata, Y, Fujimoto, T, Tsuchikawa S

    Holzforschung   65 巻   頁: 389-395   2011年

  153. 近赤外分光法による木質材料の非破壊計測 -現状と展望-

    土川 覚

    木材工業   66 巻 ( 10 ) 頁: 430-435   2011年

  154. Feasibility of near-infrared spectroscopy for online multiple trait assessment of sawn lumber

    Fujimoto Takaaki, Kurata Yohei, Matsumoto Kazushige, TSUCHIKAWA Satoru

    Journal of wood science   56 巻 ( 6 ) 頁: 452 - 459   2010年12月

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    出版者・発行元:Springer  

  155. Feasibility of near-infrared spectroscopy for online multiple trait assessment of sawn lumber 査読有り

    Fujimoto Takaaki, Kurata Yohei, Matsumoto Kazushige, Tsuchikawa Satoru

    JOURNAL OF WOOD SCIENCE   56 巻 ( 6 ) 頁: 452 - 459   2010年12月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Wood Science  

    Near-infrared (NIR) spectroscopy coupled with multivariate analysis was applied to estimate multiple traits of sawn lumber. The effects of the lumber conveying speed (LCS) and measurement resolution of spectra (MRS) on the calibrations were examined. NIR spectra ranging from 1300 to 2300 nm were acquired at LCSs of 10, 20, and 30 m/min and at MRSs of 2, 4, and 16 nm. Prediction models of bending strength (Fb), modulus of elasticity in bending tests (Eb), dynamic modulus of elasticity (Efr), and wood density (DEN) were developed using partial least-squares (PLS) analysis. LCS and MRS did not significantly influence the calibration performance for any wood property. The regression coefficients also showed no clear differences for any of the conditions. This indicates that the important explanatory variables included in the models are not greatly influenced by these measurement conditions. PLS2 analysis results, when presented graphically, allowed easy interpretation of the relationships between wood mechanical properties and chemical components, e. g., bending strength and stiffness were mainly related to polysaccharides cellulose and hemicellulose. NIR spectroscopy has considerable potential for online grading of sawn lumber, despite the harsh measurement conditions. © 2010 The Japan Wood Research Society.

    DOI: 10.1007/s10086-010-1122-5

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  156. Enhanced on-line stress grading of sawn lumber using near infrared spectroscopy 査読有り

    Fujimoto T., Matsumoto K., Kurata Y., Tsuchikawa S.

    11th World Conference on Timber Engineering 2010, WCTE 2010   2 巻   頁: 1538 - 1542   2010年12月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:11th World Conference on Timber Engineering 2010, WCTE 2010  

    Near-infrared (NIR) spectroscopy, coupled with multivariate analysis, has been used to predict the wood properties of sawn lumber, whose diffuse reflection spectra were acquired under moving conditions (30 m/min). Models predicting for bending strength (Fb), modulus of elasticity in bending (Eb), dynamic modulus of elasticity (Efr), air-dried wood density (DEN), and moisture content (MC) were developed using the partial least squares (PLS) analysis. For all wood properties, calibration models showed relative strong relationships between laboratory-measured and NIR-predicted values with coefficients of determination ranging from 0.55 to 0.80. The vector of regression coefficient revealed the important explanatory variables included in each model. It was concluded that NIR spectroscopy could be applied to on-line grading of lumber quality.

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  157. Difference of the Crystal Structure of Cellulose in Wood after Hydrothermal and Aging Degradation: A NIR Spectroscopy and XRD Study 査読有り

    Inagaki Tetsuya, Siesler Heinz W., Mitsui Katsuya, Tsuchikawa Satoru

    BIOMACROMOLECULES   11 巻 ( 9 ) 頁: 2300 - 2305   2010年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Biomacromolecules  

    The change of crystalline structure in hydrothermally treated hinoki wood was investigated by means of Fourier-transform near-infrared spectroscopy in combination with a deuterium exchange method and X-ray diffraction. The results were compared with analogous data of dry-exposed archeological wood taken from an old wooden temple. Although the decomposition of the amorphous regions in cellulose and hemicelluloses, which corresponds to an increase of the degree of crystallinity, was observed for both, archeologically and hydrothermally treated wood, the increase of crystallite thickness was confirmed only for hydrothermally treated wood. The increase of the average size of crystallites corresponds well to the measured decrease of the deuteration accessibility of the crystalline regions. As the accessibility of the crystalline regions decreased for both, D2O and t-butanol, it is assumed that due to the expansion of the crystalline domains by hydrothermal treatment several elementary fibrils are arranged at distances below 0.3 nm. © 2010 American Chemical Society.

    DOI: 10.1021/bm100403y

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  158. Effect of Crosscutting Crooked Sugi (Cryptomeria japonica) Logs on Sawing Yield and Quality of Sawn Lumber

    Ikami Y., Matsumura Y., Murata K., Tsuchikawa S.

    FOREST PRODUCTS JOURNAL   60 巻 ( 3 ) 頁: 244 - 248   2010年5月

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  159. Feasibility of Near-Infrared Spectroscopy for On-Line Grading of Sawn Lumber

    Fujimoto Takaaki, Kurata Yohei, Matsumoto Kazushige, Tsuchikawa Satoru

    APPLIED SPECTROSCOPY   64 巻 ( 1 ) 頁: 92 - 99   2010年1月

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  160. Feasibility of near-infrared spectroscopy for on-line grading of sawn lumber.

    Fujimoto T, Kurata Y, Matsumoto K, Tsuchikawa S

    Applied spectroscopy   64 巻 ( 1 ) 頁: 92 - 9   2010年1月

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  161. Feasibility of near infrared spectroscopy for on-line grading of sawn lumber 査読有り

    Fujimoto, T.; Kurata, Y.; Matsumoto, K.; Tsuchikawa, S.

    Applied Spectroscopy   64 巻   2010年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  162. Effect of Crosscutting Sugi (Cryptomeria japonica D. Don) Logs on Sawing Yield and Quality of Sawn Lumber", Forest Products Journal 査読有り

    Ikami, Y.; Matsumura, Y.; Murata, K., Tsuchikawa S.

    Forest Products Journal   60 巻 ( 3 ) 頁: 244-248   2010年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  163. Identification of dead and sound knots by near infrared spectroscopy 招待有り 査読有り

    Fujimoto, T.; Tsuchikawa, S.

    Journal of Near Infrared Spectroscopy   18 巻   2010年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  164. Difference of the crystal structure of cellulose in wood after hydrothermal and ageing degradation: A NIR spectroscopy and XRD study 査読有り

    Inagaki, T.; Siesler, H.; Mitsui, K.; Tsuchikawa, S.

    Biomacromolecules   11 巻   頁: 2300-2306   2010年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  165. Feasibility of near infrared spectroscopy for on-line multi-traits assessment of sawn lumber 査読有り

    Fujimoto, T.; Kurata, Y.; Matsumoto, K.; Tsuchikawa, S.

    Journal of Wood Science   56 巻   2010年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  166. Near Infrared Spectroscopic Assessment of Contamination Level of Sewage 査読有り

    Inagaki, T.; Shinoda Y.; Miyazawa, M.; Takamura H.; Tsuchikawa S.

    Water Science and Technology   61 巻 ( 8 ) 頁: 1957-1963   2010年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  167. Difference of the crystal structure of cellulose in wood after hydrothermal and ageing degradation: A NIR spectroscopy and XRD study

    Inagaki, T, Siesler, H, Mitsui, K, Tsuchikawa, S

    Biomacromolecules   11 巻   頁: 2300-2306   2010年

  168. Identification of dead and sound knots by near infrared spectroscopy 査読有り

    Fujimoto Takaaki, Tsuchikawa Satoru

    JOURNAL OF NEAR INFRARED SPECTROSCOPY   18 巻 ( 6 ) 頁: 473 - 479   2010年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Near Infrared Spectroscopy  

    This paper examines the identification of dead and sound knots on the wood surface using near infrared (NIR) spectroscopy. Fifty dead and sound knots samples were prepared and NIR diffuse-reflectance spectra were collected from these samples. The spectra of normal wood were also obtained from the neighbourhood of each knot. The wavenumber range from 6600 cm-1 to 5400 cm-1 (1515 nm to 1852 nm) was employed for the multivariate analysis after taking into consideration characteristics of the spectra. The soft independent modelling of class analogies (SIMCA) classification technique was conducted for classification of dead knots, sound knots and normal wood classes. Specific spectral features were found in dead and sound knots at the following absorption bands: 6130 cm-1, 5980 cm-1, 5800 cm-1 and 5700 cm-1, which were related to bark tissue and compression wood. The SIMCA model could identify the differences between dead and sound knots as well as the presence of knots. The loadings and discrimination powers were consistent with the spectral features, showing peaks due to bark tissue and compression wood. The bands provide useful information to determine the effective range of electromagnetic waves for image analysis. © IM Publications LLP 2010.

    DOI: 10.1255/jnirs.887

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  169. Identification of dead and sound knots by near infrared spectroscopy

    Fujimoto, T, Tsuchikawa, S

    Journal of Near Infrared Spectroscopy   18 巻   2010年

  170. Feasibility of near infrared spectroscopy for on-line multi-traits assessment of sawn lumber

    Fujimoto, T, Kurata, Y, Matsumoto, K, Tsuchikawa, S

    Journal of Wood Science   56 巻   2010年

  171. Feasibility of near infrared spectroscopy for on-line grading of sawn lumber

    Fujimoto, T, Kurata, Y, Matsumoto, K, Tsuchikawa, S

    Applied Spectroscopy   64 巻   2010年

  172. Effect of Crosscutting Sugi (Cryptomeria japonica D. Don) Logs on Sawing Yield and Quality of Sawn Lumber", Forest Products Journal

    Ikami, Y, Matsumura, Y, Murata, K, Tsuchikawa S

    Forest Products Journal   60 巻 ( 3 ) 頁: 244-248   2010年

  173. Near Infrared Spectroscopic Assessment of Contamination Level of Sewage

    Inagaki, T, Shinoda Y, Miyazawa, M, Takamura H, Tsuchikawa S

    Water Science and Technology   61 巻 ( 8 ) 頁: 1957-1963   2010年

  174. Near-infrared spectroscopic assessment of contamination level of sewage 査読有り

    Inagaki Tetsuya, Shinoda Yukari, Miyazawa Mitsuhiro, Takamura Hitoshi, Tsuchikawa Satoru

    WATER SCIENCE AND TECHNOLOGY   61 巻 ( 8 ) 頁: 1957 - 1963   2010年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Water Science and Technology  

    We examined the use of near infrared (NIR) spectroscopy as a rapid technique for the evaluation of sewage quality. Influent water samples, primary sedimentation tank water samples, and final effluent water samples were collected from sewage treatment facilities in Nagoya, Japan and their NIR spectra obtained. Partial least squares (PLS) models for total phosphate (TP), total nitrogen (TN), biochemical oxygen demand (BOD), total organic carbon (TOC), and turbidity of sewage water were constructed from the NIR data. The models provided good correlation between measurements obtained conventionally and those predicted from spectroscopy. Spectral variation induced by background interference in samples affected accuracy. Loading plots and score plots derived from PLS regression analysis resolved the background interference and allowed highly accurate predictions. Spectral variation induced by contamination in the sewage was a main predictor of sewage quality. These results show that NIR spectroscopy shows potential for in-line, non-destructive measurement of sewage quality. © IWA Publishing 2010.

    DOI: 10.2166/wst.2010.070

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  175. Near-infrared spectroscopic analysis of aging degradation in antique washi paper using a deuterium exchange method 査読有り

    Yonenobu Hitoshi, Tsuchikawa Satoru, Sato Karina

    VIBRATIONAL SPECTROSCOPY   51 巻 ( 1 ) 頁: 100 - 104   2009年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Vibrational Spectroscopy  

    The diffusion process of deuterated water (D2O) in washi (Japanese traditional paper) was investigated by means of a deuterium exchange method and Fourier-transform near-infrared (FT-NIR) transmission spectroscopy. The samples were the modern (AD 2003) hand-made washi and those from an archival collection of cultural artifacts (AD 1791 and 1615). Four absorption bands were identified in the NIR spectral range from 7200 to 6000 cm-1 which are due to OH groups in the amorphous, semi-crystalline and two types of crystalline regions of cellulose. The accessibility of D2O increased with decreasing state of order of cellulose, and the saturation accessibility increased with the age of the samples. It was suggested that during aging hemicellulose, which forms a composite with cellulose in paper, was progressively hydrolyzed, resulting in the expansion of inter-molecular distance between cellulose chains. The oldest sample showed a low diffusion rate compared with the others. SEM observation of the textile structures indicated that the oldest sample had two layers due to beating. It was estimated that the tight surface layer blocked the diffusant in the initial stage of the diffusion process. © 2008 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.vibspec.2008.11.001

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  176. Influence of pith location on warp of lumber in sawing medium-quality sugi (Cryptomeria japonica D. Don) logs 査読有り

    Ikami Y., Murata K., Matsumura Y., Tsuchikawa S.

    EUROPEAN JOURNAL OF WOOD AND WOOD PRODUCTS   67 巻 ( 3 ) 頁: 271 - 276   2009年8月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:European Journal of Wood and Wood Products  

    The forest and wood industry in Japan require the development of automation technology to produce high-quality lumber from medium-quality sugi (Cryptomeria japonica D. Don) logs. This study investigates the influence of pith location on the warp of lumber. While drying reduced the bow of lumber drastically its crook remained almost unchanged. Therefore, an effective sawing method to reduce crook was sought after. Crook measured immediately after sawing increased as the distance between the center of the lumber and the pith location along the width of lumber increased. A sawing method which takes pith location into account was concluded to be effective in reducing crook. Based on these results, a new sophisticated sawing procedure to produce high-quality lumber is proposed. © 2009 Springer-Verlag.

    DOI: 10.1007/s00107-009-0318-0

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  177. Near Infrared Spectroscopic Investigation of Hydrothermal Degradation Mechanism of Wood as an Analogue of Archaeological Object. Part-II: Hardwood 査読有り

    Inagaki, T.; Mitsui, K.; Tsuchikawa S.

    Applied Spectroscopy   63 巻 ( 7 ) 頁: 753-758   2009年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  178. Near Infrared Spectroscopic Investigation of Hydrothermal Degradation Mechanism of Wood as an Analogue of Archaeological Object. Part-II: Hardwood

    Inagaki, T, Mitsui, K, Tsuchikawa S

    Applied Spectroscopy   63 巻 ( 7 ) 頁: 753-758   2009年7月

  179. Near-infrared spectroscopic investigation of the hydrothermal degradation mechanism of wood as an analogue of archaeological wood. Part II: hardwood. 査読有り

    Inagaki T, Mitsui K, Tsuchikawa S

    Applied spectroscopy   63 巻 ( 7 ) 頁: 753 - 8   2009年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Spectroscopy  

    Near-infrared (NIR) spectroscopy and chemometrics were applied to analyze the degradation mechanism of hardwood following hydrothermal treatment. NIR spectra, chemical composition, oven-dried density, equilibrium moisture content, compressive Young's modulus parallel to grain, and cellulose crystallinity of artificially degraded beech as an analogue of archaeological wood were systematically measured. Partial least squares (PLS) regression analysis was employed to predict compressive Young's modulus using NIR spectra and various properties as independent variables. Results are also compared with previous data obtained from similar treatment of softwood (Hinoki cypress). The increase in cellulose crystallinity of hardwood during the initial stage of hydrothermal treatment (up to 5 hours) was correlated with an improvement in the mechanical properties of wood. Young's modulus for both hardwood and softwood showed a gradual decrease over five hours of hydrothermal treatment, which is proposed to be due to the degradation of polysaccharide. © 2009 Society for Applied Spectroscopy.

    DOI: 10.1366/000370209788701071

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  180. Near-Infrared Spectroscopic Investigation of the Hydrothermal Degradation Mechanism of Wood as an Analogue of Archaeological Wood. Part II: Hardwood 査読有り

    Inagaki Tetsuya, Mitsui Katsuya, Tsuchikawa Satoru

    APPLIED SPECTROSCOPY   63 巻 ( 7 ) 頁: 753 - 758   2009年7月

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    掲載種別:研究論文(学術雑誌)  

    Web of Science

  181. Application of time-of-flight near infrared spectroscopy to fruits -Analysis of absorption/scattering condition of NIR radiation by cross-correlation function of time-resolved profile- 査読有り

    Kurata, Y.; Tsuchikawa S.

    Applied Spectroscopy   63 巻 ( 3 ) 頁: 306-312   2009年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  182. Influence of pith location on warp of lumber in sawing medium quality Sugi (Cryptomeria japonica D. Don) logs 査読有り

    Ikami, Y.; Matsumura, Y.; Murata, K., Tsuchikawa S.

    Holz als Roh- und Werkstoff   67 巻 ( 3 ) 頁: 271-276   2009年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  183. Application of time-of-flight near infrared spectroscopy to fruits -Analysis of absorption/scattering condition of NIR radiation by cross-correlation function of time-resolved profile-

    Kurata, Y, Tsuchikawa S

    Applied Spectroscopy   63 巻 ( 3 ) 頁: 306-312   2009年3月

  184. Influence of pith location on warp of lumber in sawing medium quality Sugi (Cryptomeria japonica D. Don) logs

    Ikami, Y, Matsumura, Y, Murata, K, Tsuchikawa S

    Holz als Roh- und Werkstoff   67 巻 ( 3 ) 頁: 271-276   2009年3月

  185. Application of time-of-flight near-infrared spectroscopy to fruits: analysis of absorption and scattering conditions of near-infrared radiation using cross-correlation of the time-resolved profile. 査読有り

    Kurata Y, Tsuchikawa S

    Applied spectroscopy   63 巻 ( 3 ) 頁: 306 - 12   2009年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Spectroscopy  

    The absorption and scattering conditions of near-infrared radiation in a grapefruit, a popular thick-peeled fruit, were investigated by time-of-flight near-infrared spectroscopy (TOF-NIRS). The cross-correlation function was introduced to obtain fine spectroscopic information from the time-resolved profile. Variation of the optical parameters in both the time-resolved profile and the cross-correlation function showed that the NIR radiation was largely absorbed in the peel and considerably scattered in the flesh of the fruit. It also reflected the straightness of the input pulsed laser. The substantial optical path length of the grapefruit estimated from the cross-correlation function was approximately 4 to 5 times as long as the nominal optical path length (NOPL). The cross-correlation function was an effective tool to analyze the absorption/scattering conditions of NIR radiation in a sample where an unstable light source such as a Nd:YAG laser with high output energy was employed. © 2009 Society for Applied Spectroscopy.

    DOI: 10.1366/000370209787599004

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  186. Application of Time-of-Flight Near-Infrared Spectroscopy to Fruits: Analysis of Absorption and Scattering Conditions of Near-Infrared Radiation Using Cross-Correlation of the Time-Resolved Profile

    Kurata Yohei, Tsuchikawa Satoru

    APPLIED SPECTROSCOPY   63 巻 ( 3 ) 頁: 306 - 312   2009年3月

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  187. Near-infrared spectroscopic analysis of aging degradation in antique washi paper using a deuterium exchange method 招待有り 査読有り

    Yonenobu, H.; Sato, K.; Tsuchikawa, S.

    Vibrational Spectroscopy   51 巻   頁: 100-104   2009年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  188. Prediction of water content in Ligustrum japonicum leaf using NIR chemometric imaging 査読有り

    Kobori, H.; Tsuchikawa S.

    Journal of Near Infrared Spectroscopy   17 巻 ( 3 ) 頁: 151-157   2009年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  189. Near-infrared spectroscopic analysis of aging degradation in antique washi paper using a deuterium exchange method

    Yonenobu, H, Sato, K, Tsuchikawa, S

    Vibrational Spectroscopy   51 巻   頁: 100-104   2009年

  190. Prediction of water content in Ligustrum japonicum leaf using NIR chemometric imaging

    Kobori, H, Tsuchikawa S

    Journal of Near Infrared Spectroscopy   17 巻 ( 3 ) 頁: 151-157   2009年

  191. Prediction of water content in Ligustrum japonicum leaf using near infrared chemometric imaging 査読有り

    Kobori Hikaru, Tsuchikawa Satoru

    JOURNAL OF NEAR INFRARED SPECTROSCOPY   17 巻 ( 3 ) 頁: 151 - 157   2009年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Near Infrared Spectroscopy  

    Leaf water content is one of the most important indicators of the plant growth status. However, the traditional measurement of leaf water content requires a destructive process. A new technique using near infrared (NIR) imaging with the aid of chemometrics was developed to predict leaf water content. This method makes it possible to evaluate the leaf water content without destruction. Ligustrum japonicum leaves were taken, and then the water content and spectroscopic images at the wavelength of 1450nm were obtained by a vidicon camera fitted with a band-pass filter. A calibration model able to predict water content with high accuracy was found by partial least square analysis, using cumulative histograms based on the luminance brightness as the explanatory variables. This research confirmed the feasibility of NIR chemometric imaging to monitor the plant growth condition. © IM Publications LLP 2009 All rights reserved.

    DOI: 10.1255/jnirs.836

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  192. Rapid and nondestructive evaluations of wood mechanical properties by near infrared spectroscopy 査読有り

    Fujimoto T., Matsumoto K., Kurata Y., Tsuchikawa S.

    10th World Conference on Timber Engineering 2008   1 巻   頁: 239 - 245   2008年12月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:10th World Conference on Timber Engineering 2008  

    Near infrared (NIR) spectroscopy, coupled with multivariate analytic statistical techniques, has been used to predict the mechanical properties of solid wood samples taken from small clear and full length lumber specimens of hybrid larch. The specific mechanical characteristics evaluated were the modulus of elasticity (MOE), the modulus of rupture (MOR), compression strength parallel to the grain (CS) in small clear specimens, dynamic modulus of elasticity of air-dried lumbers (Efr), and wood density (DEN). Partial least squares (PLS) regression calibrations were developed for each wood property and found that the calibrations gave relatively strong relationships between laboratory-measured and NIR-predicted values in small clear specimens, with coefficients of determination ranging from 0.61 to 0.89. The calibration models were applied to the prediction data sets (unknown samples), suggesting that NIR spectroscopy has the potential to predict the mechanical properties with adequate accuracy. Comparison of the prediction based on spectra obtained from the radial vs tangential face showed that the prediction models based on spectra obtained from radial face were slightly superior. Although the accuracy of calibration and prediction was lesser than the small clear specimens, reasonable predictive model for wood stiffness could be taken from the full length lumber specimens. Regression coefficients resulting from PLS analysis indicates that variation in wood components such as cellulose, lignin and possibly hemicellulose governs wood mechanical properties.

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  193. Near Infrared Spectroscopic Investigation of Hydrothermal Degradation Mechanism of Wood as an Analogue of Archaeological Object. Part-I: Softwood 査読有り

    Inagaki, T.; Mitsui, K.; Tsuchikawa S.

    Applied Spectroscopy   62 巻 ( 11 )   2008年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  194. Near Infrared Spectroscopic Investigation of Hydrothermal Degradation Mechanism of Wood as an Analogue of Archaeological Object. Part-I: Softwood

    Inagaki, T, Mitsui, K, Tsuchikawa S

    Applied Spectroscopy   62 巻 ( 11 )   2008年11月

  195. Near-infrared spectroscopic investigation of the hydrothermal degradation mechanism of wood as an analogue of archaeological objects. Part I: softwood. 査読有り

    Inagaki T, Mitsui K, Tsuchikawa S

    Applied spectroscopy   62 巻 ( 11 ) 頁: 1209 - 15   2008年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Spectroscopy  

    The degradation mechanism of softwood due to the variation of strength was analyzed in conjunction with spectroscopy and chemometrics, where the sample was thermally treated with a steam atmosphere. Near-infrared (NIR) spectra, chemical composition, oven-dried density, equilibrium moisture content, compressive Young's modulus parallel to the grain, and cellulose crystallinity of artificially degraded hinoki cypresses as an analogue of archaeological objects were systematically measured. Partial least squares (PLS) regression analysis was employed to predict compressive Young's modulus using NIR spectra and some kinds of wood properties as independent variables. Good prediction models were obtained for both independent variables. The scores and the loading plots derived from PLS analysis were applied to consistently explain the mechanism of hydrothermal degradation. It was suggested that the variation of compressive Young's modulus with hydrothermal treatment was governed by two main components, that is, depolymerization of polysaccharides and variation of cellulose crystallinity. © 2008 Society for Applied Spectroscopy.

    DOI: 10.1366/000370208786401563

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  196. Near-Infrared Spectroscopic Investigation of the Hydrothermal Degradation Mechanism of Wood as an Analogue of Archaeological Objects. Part I: Softwood 査読有り

    Inagaki Tetsuya, Mitsui Katsuya, Tsuchikawa Satoru

    APPLIED SPECTROSCOPY   62 巻 ( 11 ) 頁: 1209 - 1215   2008年11月

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    掲載種別:研究論文(学術雑誌)  

    Web of Science

  197. *Discriminant Analyzing System for Wood Wastes Using A Vis-NIR Chemometrical Imaging Technique 査読有り

    Kobori, H.; Yonenobu, H.; Tsuchikawa S.

    Applied Spectroscopy   62 巻 ( 8 ) 頁: 854-859   2008年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  198. *Discriminant Analyzing System for Wood Wastes Using A Vis-NIR Chemometrical Imaging Technique

    Kobori, H, Yonenobu, H, Tsuchikawa S

    Applied Spectroscopy   62 巻 ( 8 ) 頁: 854-859   2008年8月

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    可視近赤外ケモメトリカル画像処理法を提案し、これによって木質廃材を高精度で判別する手順について紹介した。

  199. Discriminant analyzing system for wood wastes using a visible-near-infrared chemometric imaging technique. 査読有り

    Kobori H, Yonenobu H, Noma J, Tsuchikawa S

    Applied spectroscopy   62 巻 ( 8 ) 頁: 854 - 9   2008年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Spectroscopy  

    A new optical system was developed and applied to automated separation of wood wastes, using a combined technique of visible-near-infrared (Vis-NIR) imaging analysis and chemometrics. Three kinds of typical wood wastes were used, i.e., non-treated, impregnated, and plastic-film overlaid wood. The classification model based on soft independent modeling of class analogy (SIMCA) was examined using the difference luminance brightness of a sample. Our newly developed system showed a good/promising performance in separation of wood wastes, with an average rate of correct separation of 89%. Hence, it is concluded that the system is efficiently feasible for online monitoring and separation of wood wastes in recycling mills. © 2008 Society for Applied Spectroscopy.

    DOI: 10.1366/000370208785284295

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  200. Estimation of sawn face width of Sugi (Cryptomeria japonica D. Don) logs by cross-sectional shape with approximation profile 査読有り

    Ikami Y., Matsumura Y., Murata K., Tsuchikawa S.

    HOLZ ALS ROH-UND WERKSTOFF   66 巻 ( 4 ) 頁: 243 - 247   2008年8月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Holz als Roh - und Werkstoff  

    In sawing systems producing high quality lumber from medium diameter sugi (Cryptomeria japonica D. Don) logs, operators must carefully decide the amount of setworks taking into consideration the sawn face width and appearance of knots so that the work efficiency often suffers considerable reduction. A simple mathematical method to estimate the sawn face width on the basis of cross-sectional shape with an approximation profile was proposed. Ninety cross-sectional shapes were measured using a newly developed measuring device and estimated as a circle or an ellipse, where 89% of the cross-sectional shapes fit the ellipses. The error margin in 72-75% of the sawn face width estimates was 2.0 cm or less, which was equal to the conventional value achieved by skilled operators. © 2008 Springer-Verlag.

    DOI: 10.1007/s00107-008-0242-8

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  201. Near-infrared spectroscopic monitoring of the water adsorption/desorption process in modern and archaeological wood

    Inagaki Tetsuya, Yonenobu Hitoshi, Tsuchikawa Satoru

    APPLIED SPECTROSCOPY   62 巻 ( 8 ) 頁: 860 - 865   2008年8月

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  202. Near-infrared spectroscopic monitoring of the water adsorption/desorption process in modern and archaeological wood. 査読有り

    Inagaki T, Yonenobu H, Tsuchikawa S

    Applied spectroscopy   62 巻 ( 8 ) 頁: 860 - 5   2008年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Spectroscopy  

    We investigated the adsorption/desorption mechanism of water and the variation of water adsorption for modern and archaeological wood using near-infrared spectroscopy. A mixture model of water was used to decompose the near-infrared difference spectra into three components (free water molecules (S0), those with one OH group engaged in hydrogen bonding (S1), and those with two OH groups engaged in hydrogen bonding (S2)) based on a principal component analysis. The variations of each water component with relative humidity could be explained by proposing a model that describes water absorption in three stages. It was concluded that the aging phenomenon in wood is due to the decrease of adsorption sites on hemicellulose and amorphous cellulose. © 2008 Society for Applied Spectroscopy.

    DOI: 10.1366/000370208785284312

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  203. Discriminant analyzing system for wood wastes using a visible-near-infrared chemometric imaging technique 査読有り

    Kobori Hikaru, Yonenobu Hitoshi, Noma Junichi, Tsuchikawa Satoru

    APPLIED SPECTROSCOPY   62 巻 ( 8 ) 頁: 854 - 859   2008年8月

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    掲載種別:研究論文(学術雑誌)  

    Web of Science

  204. Near Infrared Spectroscopic Monitoring of the Diffusion Process of Deuterium-Labeled Molecules in Wood 査読有り

    Tsuchikawa S., Siesler H.

    Characterization of the Cellulosic Cell Wall     頁: 123 - 137   2008年4月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Characterization of the Cellulosic Cell Wall  

    Near infrared transmission spectroscopy was used to monitor the diffusion process of deuterium-labeled molecules in wood samples. To better understand the state of order in wood cellulose, several diffusion experiments were performed with Sitka spruce and beech in D2O and two OD-deuterated alcohols of different geometry. Four absorption bands in the NIR region (7200-6100 cm-1) were assigned to 2 ×ν (OH) absorptions of OH groups in the amorphous, semi-crystalline, and the two kinds of intramolecularly hydrogen-bonded crystalline regions, respectively. The saturation accessibility varied characteristically with the OH groups in different states of order in the wood substance, the diffusants, and the wood species, respectively. The effect of the anatomical cellular structure on the accessibility is reflected in the variation of the diffusion rate with wood species. We proposed a new interpretation about the fine structure of the microfibrils in the cell wall by comparing a series of results for hardwood and softwood specimens. © 2006 Blackwell Publishing.

    DOI: 10.1002/9780470999714.ch10

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  205. Monitoring of hydroxyl groups in wood during heat treatment using NIR spectroscopy 査読有り

    Mitsui Katsuya, Inagaki Tetsuya, Tsuchikawa Satoru

    BIOMACROMOLECULES   9 巻 ( 1 ) 頁: 286 - 288   2008年1月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Biomacromolecules  

    This paper deals with the evaluation of thermally treated wood by near-infrared (NIR) spectroscopy. In the NIR second derivative spectrum, the absorption band at 6913 cm-1 appeared with the procession of heat treatment, which conclusively assigned to the phenolic hydroxyl groups due to the lignin in comparison with the spectrum of acetylated spruce wood. As a result of the changes in the ratio of the areal integral calculated from spectral separation in the region of hydroxyl groups (7200-6100 cm-1) by the Gauss-Newton method, it was clear that the degradation of hydroxyl group in the cellulose started predominantly from the amorphous region and followed to semicrystalline and crystalline region. There was an obvious correlation between the weight decrement of wood and the decrement of hydroxyl groups in the cellulose by heat treatment. © 2008 American Chemical Society.

    DOI: 10.1021/bm7008069

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  206. Monitoring of Hydroxyl Groups in Wood during Heat Treatment Using NIR Spectroscopy 査読有り

    Mitsui, K.; Inagaki, T.; Tsuchikawa S.

    Biomacromolecules   9 巻   頁: 286-288   2008年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  207. Application of near infrared spectroscopy for estimating wood mechanical properties of small clear and full length lumber specimens 査読有り

    Fujimoto, T.; Kurata, Y.; Matsumoto, K.; Tsuchikawa, S.

    Journal of Near Infrared Spectroscopy   16 巻   頁: 529-537   2008年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  208. *NIR spectroscopic monitoring of water adsorption/desorption process in modern and archaeological wood" 査読有り

    Inagaki, T.; Yonenobu, H.; Tsuchikawa S.

    Applied Spectroscopy   62 巻 ( 8 ) 頁: 861-865   2008年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  209. Estimation of Sawn Face Width of Sugi (Cryptomeria japonica D. Don) Logs by Cross-Sectional Shape with Approximation Profile 査読有り

    Ikami, Y.; Matsumura, Y.; Murata, K., Tsuchikawa S.

    Holz als Roh- und Werkstoff   66 巻 ( 4 ) 頁: 243-247   2008年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  210. *Application of time-of-flight near infrared spectroscopy to fruits -Permeability of pulsed laser into Satsuma mandarin, White grapefruit and Fuji apple- 査読有り

    Kurata, Y.; Ikemoto, Y.; Tsuchikawa S.

    Journal of Near Infrared Spectroscopy   16 巻   頁: 139-142   2008年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  211. *Application of time-of-flight near infrared spectroscopy to fruits -Permeability of pulsed laser into Satsuma mandarin, White grapefruit and Fuji apple-

    Kurata, Y, Ikemoto, Y, Tsuchikawa S

    Journal of Near Infrared Spectroscopy   16 巻   頁: 139-142   2008年

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    時間飛行近赤外分光法を果実の光計測に応用し、内部品質評価の可能性を検討した。学内共同研究者:倉田洋平、池本有香

  212. Application of near infrared spectroscopy for estimating wood mechanical properties of small clear and full length lumber specimens 査読有り

    Fujimoto Takaaki, Kurata Yohei, Matsumoto Kazushige, Tsuchikawa Satoru

    JOURNAL OF NEAR INFRARED SPECTROSCOPY   16 巻 ( 6 ) 頁: 529 - 537   2008年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Near Infrared Spectroscopy  

    Near infrared (NIR) spectroscopy, coupled with multivariate analytic statistical techniques, has been used to predict the mechanical properties of solid wood samples taken from small clear and full length lumber specimens of hybrid larch (Larix gmelinii var. japonica x Larix kaempferi). The specific mechanical characteristics evaluated were modulus of elasticity (MOE), modulus of rupture (MOR) in bending tests, maximum crushing strength in compression parallel to grain (CS), dynamic modulus of elasticity of air-dried lumbers (Efr), and wood density (DEN). Partial least squares (PLS) regression calibrations were developed for each wood property. The calibrations had relatively strong relationships between laboratory-measured and NIR-predicted values in small clear specimens, with coefficients of determination ranging from 0.61 to 0.89. The calibration models were applied to the prediction data sets and results suggested that NIR spectroscopy has the potential to predict mechanical properties of small clears with adequate accuracy (standardised prediction error=2.06-2.82). The PLS models based on spectra from the radial face (R2=0.73-0.89) of wood were slightly superior to those from the tangential face (R2=0.61-0.84). This might be due to the differences of the surface condition in terms of the anatomical structures and, thus, radial face better represents the sample. A reasonable predictive model for wood stiffness was also obtained from the full length lumber specimens, but the accuracy of the calibration for prediction was less than the small clear specimens (R2=0.49-0.78). The regression coefficients obtained from the PLS models showed similar trends in all mechanical properties. It was suggested that the absorption bands due to the OH-groups in cellulose were the major contributors to building robust models for predicting the mechanical properties of wood © IM Publications LLP 2008 All rights reserved.

    DOI: 10.1255/jnirs.818

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  213. Application of near infrared spectroscopy for estimating wood mechanical properties of small clear and full length lumber specimens

    Fujimoto, T, Kurata, Y, Matsumoto, K, Tsuchikawa, S

    Journal of Near Infrared Spectroscopy   16 巻   頁: 529-537   2008年

  214. *NIR spectroscopic monitoring of water adsorption/desorption process in modern and archaeological wood"

    Inagaki, T, Yonenobu, H, Tsuchikawa S

    Applied Spectroscopy   62 巻 ( 8 ) 頁: 861-865   2008年

     詳細を見る

    現生木と古材の水分吸着状況の違いを近赤外分光法に基づいて詳細に検討した。学内共同研究者:稲垣哲也

  215. Estimation of Sawn Face Width of Sugi (Cryptomeria japonica D. Don) Logs by Cross-Sectional Shape with Approximation Profile

    Ikami, Y, Matsumura, Y, Murata, K, Tsuchikawa S

    Holz als Roh- und Werkstoff   66 巻 ( 4 ) 頁: 243-247   2008年

  216. Monitoring of Hydroxyl Groups in Wood during Heat Treatment Using NIR Spectroscopy

    Mitsui, K, Inagaki, T, Tsuchikawa S

    Biomacromolecules   9 巻   頁: 286-288   2008年

  217. Short communication - Application of time-of-flight near infrared spectroscopy to fruits-permeability of pulsed laser beam into Satsuma mandarin, White grapefruit and Fuji apple 査読有り

    Kurata Yohei, Ikernoto Yuka, Tsuchikawa Satoru

    JOURNAL OF NEAR INFRARED SPECTROSCOPY   16 巻 ( 2 ) 頁: 139 - 142   2008年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Near Infrared Spectroscopy  

    The permeability of a pulsed laser beam into Satsuma mandarin, White grapefruit and Fuji apple was compared by time-of-flight near infrared (ToF-NIR) spectroscopy. In this study, a compact measurement system including a dye-doped plastic laser cavity with a wavelength of 800 nm and an avalanche photodiode were employed. The NIR radiation attenuance (i.e. optical density) in apple was higher than in the citrus fruit. The peak maxima of transmitted radiation of intact Satsuma mandarin increased 130 times more than that of intact grapefruit. Differences in diameter related directly to attenuance. The peak maxima of transmitted radiation of peeled grapefruit increased 250 times more than that of intact grapefruit; however, these increases were not found for Satsuma mandarin or apple. NIR radiation attenuance of the grapefruit peel was greater than for the peel of the other fruits. The incident pulsed laser beam was uniformly scattered in the citrus sample, whereas the scattering condition of the pulsed laser beam in apple might not be uniform because of the presence of core tissue. Thus, while the pulsed laser beam could be transmitted through citrus fruit and apple, the effect of fruit size and peel on the NIR radiation attenuance characteristically varied. © IM Publications LLP 2008 All rights reserved.

    DOI: 10.1255/jnirs.764

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  218. Estimation of Wood Stiffness and Strength Properties of Hybrid Larch by Near-infrared Spectroscopy", Applied Spectroscopy 査読有り

    Fujimoto, T.; Yamamoto, H.; Tsuchikawa, S.

    Applied Spectroscopy   61 巻 ( 8 ) 頁: 882-888   2007年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  219. Estimation of wood stiffness and strength properties of hybrid larch by near-infrared spectroscopy

    Fujimoto Takaaki, Yamamoto Hiroyuki, Tsuchikawa Satoru

    APPLIED SPECTROSCOPY   61 巻 ( 8 ) 頁: 882 - 888   2007年8月

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  220. Estimation of wood stiffness and strength properties of hybrid larch by near-infrared spectroscopy. 査読有り

    Fujimoto T, Yamamoto H, Tsuchikawa S

    Applied spectroscopy   61 巻 ( 8 ) 頁: 882 - 8   2007年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Spectroscopy  

    This work was undertaken to investigate the feasibility of near-infrared (NIR) spectroscopy for estimating wood mechanical properties, i.e., modulus of elasticity (MOE) and modulus of rupture (MOR) in bending tests. Two sample sets having large and limited density variation were prepared to examine the effects of wood density on estimation of MOE and MOR by the NIR technique. Partial least squares (PLS) analysis was employed and it was found that the relationships between laboratorymeasured and NIR-predicted values were good in the case of sample sets having large density variation. MOE could be estimated even when density variation in the sample set was limited. It was concluded that absorption bands due to the OH group in the semi-crystalline or crystalline regions of cellulose strongly influenced the calibrations for bending stiffness of hybrid larch. This was also suggested from the result that both a-cellulose content and cellulose crystallinity showed moderate positive correlation to wood stiffness. © 2007 Society for Applied Spectroscopy.

    DOI: 10.1366/000370207781540150

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  221. Estimation of Wood Stiffness and Strength Properties of Hybrid Larch by Near-infrared Spectroscopy", Applied Spectroscopy

    Fujimoto, T, Yamamoto, H, Tsuchikawa, S

    Applied Spectroscopy   61 巻 ( 8 ) 頁: 882-888   2007年8月

  222. 第2回近赤外分光部会シンポジウム

    土川 覚

    分光研究 = Journal of the spectroscopical research of Japan   56 巻 ( 2 )   2007年4月

  223. *A Review of Recent Near Infrared Research for Wood and Paper 招待有り 査読有り

    Tsuchikawa, S.

    Applied Spectroscopy Review   42 巻 ( 1 ) 頁: 43-71   2007年

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    担当区分:筆頭著者   記述言語:英語  

  224. *A Review of Recent Near Infrared Research for Wood and Paper

    Tsuchikawa, S

    Applied Spectroscopy Review   42 巻 ( 1 ) 頁: 43-71   2007年

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    本論文は、1990年代以降急速に広まった木材科学・工業分野への近赤外分光法の適用事例を網羅的に紹介した総説形式のものである。約150の文献が、詳細に紹介されている。

  225. A review of recent near infrared research for wood and paper 査読有り

    Tsuchikawa Satoru

    APPLIED SPECTROSCOPY REVIEWS   42 巻 ( 1 ) 頁: 43 - 71   2007年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Spectroscopy Reviews  

    This review article introduces recent technical and scientific reports in terms of near infrared (NIR) spectroscopy in the wood and paper science and industry, where interest has increased during the last couple decades. Many researchers reported the NIR technique was useful to detect multi information in both chemical and physical properties of wood materials, although it was widely used in a state where characteristic cellular structure was retained. In the case of application of NIR spectroscopy to pulp and paper, many publications have pointed out its high probability as online measurement techniques during paper-making process control. Arguments referred to the importance of NIR spectroscopy as fundamental and applied research of wood and paper. Copyright © Taylor & Francis Group, LLC.

    DOI: 10.1080/05704920601036707

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  226. Instrumentation: Instruments

    Mcclure W.

    Near-Infrared Spectroscopy in Food Science and Technology     頁: 73 - 108   2006年2月

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    出版者・発行元:Near-Infrared Spectroscopy in Food Science and Technology  

    DOI: 10.1002/9780470047705.ch4

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  227. Instrumentation: Time-of-Flight Spectroscopy

    Tsuchikawa S.

    Near-Infrared Spectroscopy in Food Science and Technology     頁: 109 - 120   2006年2月

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    出版者・発行元:Near-Infrared Spectroscopy in Food Science and Technology  

    DOI: 10.1002/9780470047705.ch4

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  228. Sampling Techniques

    Tsuchikawa S.

    Near-Infrared Spectroscopy in Food Science and Technology     頁: 133 - 143   2006年2月

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    出版者・発行元:Near-Infrared Spectroscopy in Food Science and Technology  

    DOI: 10.1002/9780470047705.ch5

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  229. Near infrared spectroscopic monitoring of the diffusion process of deuterium-labeled molecules in wood

    Tsuchikawa Satoru, Siesler H. W.

    CHARACTERIZATION OF THE CELLULOSIC CELL WALL     頁: 123 - +   2006年

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  230. Low atmospheric temperature dependence on photo degradation of wood 査読有り

    Mitsui K, Tsuchikawa S

    JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY   81 巻 ( 2 ) 頁: 84 - 88   2005年11月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Photochemistry and Photobiology B: Biology  

    This paper deals with the photodegradation of wood in low atmospheric temperature region (-40 to 50 °C), and discusses the changes in color and IR spectra. The color and IR spectra of wood hardly changed with photo-irradiation at -40 °C but did at -20 °C. Therefore, it is thought that the photo-energy causes the scission of chemical bonds or the production of radicals; however, heat energy is needed to yellow of wood (i.e., to produce quinone). In case of softwoods, the absorption of the carbonyl band consisted of two sub-bands, and the carbonyl band at around 1710 cm-1 increased at lower temperature than that at around 1760 cm-1 by light-irradiation. Such IR measurement due to lignin degradation means that the photodegradation of softwoods is faster than that of hardwoods. The color change by exposure to light in the low temperature was also caused by the degradation of lignin. © 2005 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.jphotobiol.2005.05.011

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  231. Rapid assessment of wood chemical properties and pulp yield of Eucalyptus camaldulensis in Thailand tree plantations by near infrared spectroscopy for improving wood selection for high quality pulp

    Terdwongworakul Anupun, Punsuwan Vittaya, Thanapase Warunee, TSUCHIKAWA Satoru

    Journal of wood science   51 巻 ( 2 ) 頁: 167 - 171   2005年4月

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    出版者・発行元:Springer  

  232. Near-infrared spectroscopic study of the physical and mechanical properties of wood with meso- and micro-scale anatomical observation

    Tsuchikawa S, Hirashima Y, Sasaki Y, Ando K

    APPLIED SPECTROSCOPY   59 巻 ( 1 ) 頁: 86 - 93   2005年1月

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  233. Near-infrared spectroscopic study of the physical and mechanical properties of wood with meso- and micro-scale anatomical observation. 査読有り

    Tsuchikawa S, Hirashima Y, Sasaki Y, Ando K

    Applied spectroscopy   59 巻 ( 1 ) 頁: 86 - 93   2005年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Spectroscopy  

    Estimation of the density along with the tensile strength of wood within both the elastic and plastic deformation ranges, represented as modulus of elasticity (MOE) and ultimate tensile stress (UTS), respectively, were performed using near-infrared (NIR) spectroscopy. A partial least squares (PLS) analysis was applied to the measurements of density, MOE, and UTS, and resulted in a high accuracy of prediction, independent of wood species. The correlation coefficient between the NIR spectra and criterion variables, and the regression vector resulting from the PLS analysis, suggested that the characteristic absorption bands were strongly related to the predictability of each property. In the case of softwood, absorption bands due to intra-molecular hydrogen-bonded OH groups in the crystalline regions of cellulose, which are oriented preferentially in a direction parallel to the cellulose chain, might strongly affect the tensile strength of softwood. Hardwoods have much more complex and variable structures than softwoods; therefore, it was supposed that the key factor governing the tensile strength in hardwood would be the interaction between the three principal constituents (i.e., cellulose, hemicellulose, and lignin) of wood.

    DOI: 10.1366/0003702052940413

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  234. Rapid assessment of wood chemical properties and pulp yield of Eucalyptus camaldulensis in Thailand tree plantation by near infrared spectroscopy aiming high quality pulp wood selection 査読有り

    Terdwongworakul, A.; Punsuwan, V.; Thanapase, W.; Tsuchikawa, S.

    Journal of Wood Science   51 巻   頁: 167-171   2005年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  235. *Near-infrared spectroscopic observation of the ageing process in archaeological wood using a deuterium exchange method 査読有り

    Tsuchikawa, S.; Yonenobu, H.; Siesler, H. W.

    The Analyst   130 巻   頁: 379-384   2005年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  236. Application of near infrared spectroscopy to assessments of colour change in plantation-grown Eucalyptus grandis wood subjected to heat and steaming treatments 査読有り

    Wu Y.Q.; Tsuchikawa S.; Hayashi K.

    Journal of Near Infrared Spectroscopy   13 巻   頁: 371-376   2005年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  237. Low atmospheric temperature dependence on photodegradation of wood 査読有り

    Mitsui, K.; Tsuchikawa S.

    Journal of Photochemistry and Photobiology B: Biology   81 巻   頁: 84-88   2005年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  238. Near-infrared spectroscopic study of the physical and mechanical properties of wood with meso- and micro-scale anatomical observation 査読有り

    Tsuchikawa, S.; Hirashima, Y.; Sasaki, Y.; Ando, K.

    Applied Spectroscopy   59 巻 ( 1 ) 頁: 78-85   2005年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  239. *Near-infrared spectroscopic observation of the ageing process in archaeological wood using a deuterium exchange method

    Tsuchikawa, S, Yonenobu, H, Siesler, H. W

    The Analyst   130 巻   頁: 379-384   2005年

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    本論文では、重水素置換法と近赤外分光法を組み合わせた新しい手法によって、木材の経年劣化様式を分子レベルで詳細に観察し、細胞壁内におけるセルロースミクロフィブリル間の間隙寸法のオングストロームオーダの経年変化状況を把握することに成功した。これによって、NIR-Archeometryとも呼ぶべき新しい考古計測学手法の基盤が確立された。

  240. Application of near infrared spectroscopy to assessments of colour change in plantation-grown Eucalyptus grandis wood subjected to heat and steaming treatments

    Wu Y.Q, Tsuchikawa S, Hayashi K

    Journal of Near Infrared Spectroscopy   13 巻   頁: 371-376   2005年

  241. Application of near infrared spectroscopy to assessments of colour change in plantation-grown Eucalyptus grandis wood subjected to heat and steaming treatments

    Wu YQ, Tsuchikawa S, Hayashi K

    JOURNAL OF NEAR INFRARED SPECTROSCOPY   13 巻 ( 6 ) 頁: 371 - 376   2005年

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  242. Application of near infrared spectroscopy to assessments of colour change in plantation-grown Eucalyptus grandis wood subjected to heat and steaming treatments 査読有り

    Wu Y.Q., Tsuchikawa S., Hayashi K.

    Journal of Near Infrared Spectroscopy   13 巻 ( 6 ) 頁: 371 - 376   2005年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Near Infrared Spectroscopy  

    The relationships between colour parameters and chemical components of Eucalyptus grandis wood under a steaming and a heating process were examined by near infrared (NIR) spectroscopy to assess the best drying conditions. The results indicated that: 1) under steaming conditions, the second derivatives of absorption bands due to OH in the crystalline region of cellulose and CH in hemicellulose presented statistically significant positive correlation values for L* or b* and a decrease in lignin might be the reason leading to the colour changes; 2) under heat-treated conditions, the colour darkening process in wood was often accompanied by a severe collapse phenomena, especially at the 100°C condition. It was found spectroscopically that the concentrations of cellulose and hemicellulose were increased relatively by the collapse occurring and that lignin decreased with the elevated drying temperature. The crystalline regions in cellulose and hemicellulose were related to "blueness" (partial darkness) of E. grandis caused by the drying process. © NIR Publications 2005.

    DOI: 10.1255/jnirs.568

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  243. Near-infrared spectroscopic observation of the ageing process in archaeological wood using a deuterium exchange method 査読有り

    Tsuchikawa S, Yonenobu H, Siesler HW

    ANALYST   130 巻 ( 3 ) 頁: 379 - 384   2005年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Analyst  

    The ageing degradation of the fine wood structure of dry-exposed archaeological wood was investigated by Fourier transform near-infrared spectroscopy with the aid of a deuterium exchange method. The archaeological wood sample was taken from an old wooden temple in Japan (late 7th century), which has been designated as a UNESCO world heritage site. Comparing the analytical results with those of a modern wood sample of the same species, the ageing process of archaeological wood was clarified as a change in the state of order on a macromolecular structural level. It can be concluded from NIR spectra that the amorphous region, and partially semi-crystalline region, in cellulose, hemicellulose, and lignin decreased by the ageing degradation, whereas the crystalline region in cellulose was not affected by the ageing. The accessibility of the diffusant to effect H/D-exchange was monitored by an OH-related absorption band obtained from FT-NIR transmission spectroscopy and characteristically varied with the ageing process of the wood samples, the absorption bands characteristic of a specific state of order and the diffusion agent. Finally, we proposed a morphological model to describe the variation of the fine structure of the microfibrils in the cell wall with ageing degradation. The state of microfibrils changed loosely by ageing, so that elementary fibrils were arranged loosely under 5 Å, whereas several elementary fibrils in the modern wood were arranged in very close proximity under 3 Å to each other. © The Royal Society of Chemistry 2005.

    DOI: 10.1039/b412759e

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  244. Rapid assessment of wood chemical properties and pulp yield of Eucalyptus camaldulensis in Thailand tree plantations by near infrared spectroscopy for improving wood selection for high quality pulp 査読有り

    Terdwongworakul A, Punsuwan V, Thanapase W, Tsuchikawa S

    JOURNAL OF WOOD SCIENCE   51 巻 ( 2 ) 頁: 167 - 171   2005年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Wood Science  

    Near-infrared (NIR) spectroscopy has been demonstrated as a means for rapid nondestructive determination of the chemical composition and final pulp yield of Eucalyptus camaldulensis in Thailand tree plantations. Multiple linear regression (MLR) analysis and partial least squares (PLS) analysis were introduced to develop statistical models in terms of calibration equations for total pulp yield, screened pulp yield, and contents of α-cellulose, pentosans, and lignin in wood. In MLR analysis, a reasonably good calibration equation was found only for pentosans (standard error of prediction (SEP): 0.98%). The PLS analysis improved the accuracy of prediction for every criterion variable, especially for pentosans (SEP: 0.91%) and lignin (SEP: 0.52%). Also, in the case of screened pulp yield, we were able to use such a statistical result as an indicator of the characteristics of the pulp and paper. Thus, NIR spectroscopy could be satisfactorily used as an effective assessment technique for Eucalyptus camaldulensis plantation trees. © The Japan Wood Research Society 2005.

    DOI: 10.1007/s10086-004-0633-3

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  245. Rapid assessment of wood chemical properties and pulp yield of Eucalyptus camaldulensis in Thailand tree plantation by near infrared spectroscopy aiming high quality pulp wood selection

    Terdwongworakul, A, Punsuwan, V, Thanapase, W, Tsuchikawa, S

    Journal of Wood Science   51 巻   頁: 167-171   2005年

  246. Near-infrared spectroscopic study of the physical and mechanical properties of wood with meso- and micro-scale anatomical observation

    Tsuchikawa, S, Hirashima, Y, Sasaki, Y, Ando, K

    Applied Spectroscopy   59 巻 ( 1 ) 頁: 78-85   2005年

     詳細を見る

    本論文では、木材の強度特性を支配する諸因子を分光学的に非破壊で推定することを試み、系統的な実験とケモメトリックス的な解析によって密度、縦弾性係数および引張応力が高精度で推定可能となることを明らかにした。また、その理論的根拠を明らかにすることによって、新しい測定手法としての基盤を形成することに成功した。

  247. Spectroscopic monitoring of wood characteristics variation by light-irradiation 査読有り

    Tsuchikawa S, Inoue K, Mitsui K

    FOREST PRODUCTS JOURNAL   54 巻 ( 11 ) 頁: 71 - 76   2004年11月

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    掲載種別:研究論文(学術雑誌)  

    Web of Science

  248. Wood photography using light irradiation and heat treatment 査読有り

    Mitsui K, Murata A, Tsuchikawa S, Kohara M

    COLOR RESEARCH AND APPLICATION   29 巻 ( 4 ) 頁: 312 - 316   2004年8月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Color Research and Application  

    To apply the coloring method using light irradiation and thermal treatment to print photographs on wood, the effect of the transmittance of negative films was investigated. ΔE* decreased with light irradiation when specimens covered with films with transmittances exceeding 20% were irradiated for 100 h. It was thought that this phenomenon was due to the decrease in Δb*. The color of light-irradiated wood changed remarkably with thermal treatment; however, the change in the color of exposed specimens covered with films with transmittances exceeding roughly 20% became constant. Clear photographs could be printed on wood using negative films with transmittances less than approximately 20%. Furthermore, the difference between the maximum and minimum values of ΔE* after thermal treatment was about 22. Humans can distinguish four to seven colors that can be created by this method. © 2004 Wiley Periodicals, Inc.

    DOI: 10.1002/col.20027

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  249. Application of time-of-flight near infrared spectroscopy for detecting sugar and acid contents in apples 査読有り

    Tsuchikawa S, Hamada T

    JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY   52 巻 ( 9 ) 頁: 2434 - 2439   2004年5月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Agricultural and Food Chemistry  

    A newly constructed optical measurement system was introduced to nondestructively measure the composition of the inside of an apple by time-of-flight near-infrared spectroscopy (TOF-NIRS). As sugar content increased, optical parameters concerned with time-resolved profile of transmitted pulsed light (the attenuance of peak maxima, At, the time delay of peak maxima, Δt, and the variation of full width at half-maximum, Δw) decreased gradually. When the acid content increased, At and Δw increased; however, a significant tendency could not be found for Δt. At, Δt, and Δw were employed as the explanatory variables for multiple linear regression, principle component regression, and partial least-squares analysis. It was possible to predict both sugar and acid contents in an apple with high precision by TOF-NIRS. Especially, the superiority of TOF-NIRS lied in more precise determination of acid content.

    DOI: 10.1021/jf030705v

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  250. 近赤外分光法を用いた新しい非破壊年代測定法の開発(第16回名古屋大学タンデトロン加速器質量分析計シンポジウム平成15(2003)年度報告)

    米延 仁志, 土川 覚, 小田 寛貴, Siesler Heinz W.

    名古屋大学加速器質量分析計業績報告書   ( 15 ) 頁: 74 - 82   2004年3月

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    出版者・発行元:名古屋大学年代測定資料研究センター  

    第16回名古屋大学タンデトロン加速器質量分析計シンポジウム(平成15年(2003年度)報告 Proceedings of the 16th Symposium on Researches Using the Tandetron AMS System at Nagoya University in 2003 日時:平成16(2004)年1月22日(木)、23日(金) 会場:名古屋大学シンポジオン Date:January 22nd and 23rd,2004 Place:Nagoya University Symposion Hall

    DOI: 10.18999/sumrua.15.74

  251. Spectroscopic Monitoring of Wood Characteristics Variation by Light-Irradiation 査読有り

    "Tsuchikawa, S.; Inoue, K.; Mitsui K."

    Forest Products Journal   54 巻   頁: 71-76   2004年1月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  252. Wood Photography Using Light-Irradiation and Heat Treatment 査読有り

    Mitsui, K.; Murata, A.; Tsuchikawa, S.; Kohara M.

    Color Research and Application   29 巻 ( 4 ) 頁: 312-315   2004年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  253. Application of Time-of-Flight Near Infrared Spectroscopy for Detecting Sugar and Acid Contents in Apples 査読有り

    Tsuchikawa, S.; Hamada, T.

    Journal of Agricultural and Food Chemistry   52 巻 ( 9 ) 頁: 2434-2439   2004年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  254. "Nondestructive measurement and analysis of physical properties for wood by near infrared spectroscopy"

    Tsuchikawa S

    MOKUZAI GAKKAISHI   50 巻 ( 3 ) 頁: A10 - A12   2004年

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  255. Application of Time-of-Flight Near Infrared Spectroscopy for Detecting Sugar and Acid Contents in Apples

    Tsuchikawa, S, Hamada, T

    Journal of Agricultural and Food Chemistry   52 巻 ( 9 ) 頁: 2434-2439   2004年

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    本論文では、光伝播の強度・時間変化をナノ秒オーダで詳細に把握することによって、試料内部情報を非破壊で検出する時間飛行近赤外分光法(TOF-NIRS)を世界で初めて提案するとともに、これをリンゴの糖度・酸度検出に適応し、既存の手法では達し得なかった精度で推定可能となることを示した。

  256. 組合せ負荷による損傷累積

    小原 光博, 三井 勝也, 村田 明宏, 土川 覚

    岐阜大学教育学部研究報告 自然科学   28 巻 ( 2 ) 頁: 129 - 131   2004年

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    出版者・発行元:岐阜大学  

  257. 近赤外分光法による木質系廃棄物の判別分析

    土川 覚, 山登 香織

    木材保存 = Wood preservation   29 巻 ( 6 ) 頁: 259 - 262   2003年11月

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    出版者・発行元:公益社団法人 日本木材保存協会  

    DOI: 10.5990/jwpa.29.259

  258. 近赤外分光法による木質系廃棄物の判別分析 招待有り

    "土川覚,山登香織"

    木材保存   29 巻   頁: 259-262   2003年11月

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  259. Near-infrared spectroscopic comparison of antique and modern wood

    Yonenobu H, Tsuchikawa S

    APPLIED SPECTROSCOPY   57 巻 ( 11 ) 頁: 1451 - 1453   2003年11月

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  260. Near-infrared spectroscopic comparison of antique and modern wood. 査読有り

    Yonenobu H, Tsuchikawa S

    Applied spectroscopy   57 巻 ( 11 ) 頁: 1451 - 3   2003年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Spectroscopy  

    The temporal degradation of old wooden building material was estimated by using near-infrared (NIR) spectrometry. The difference second-derivative NIR spectra suggest that hemicellulose and holocellulose decreased while lignin increased relatively. It was revealed that nondestructive NIR spectroscopy is a useful technique in examining properties of antique wood.

    DOI: 10.1366/000370203322554635

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  261. Application of near-infrared spectroscopy to wood discrimination 査読有り

    Tsuchikawa S., Inoue K., Noma J., Hayashi K.

    Journal of Wood Science   49 巻 ( 1 ) 頁: 29 - 35   2003年10月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Wood Science  

    This study deals with a new nondestructive discriminant analysis by which wood can be classified on the basis of a combination of near-infrared (NIR) spectroscopy and Mahalanobis' generalized distance. Its accuracy and reasonability were examined for wood samples with various moisture contents ranging from oven-dried to a fully saturated free water state. In a discriminant analysis employing second derivative spectra, each wood group was well distinguished. Mahalanobis' generalized distances between softwoods are relatively independent of analytical pattern, whereas the distances between hardwoods are large for easy classification. There may be two reasons for selecting a wavelength: (1) when the chemical component of wood substance relates to the discriminant analysis; and (2) when the difference in moisture content with wood species relates to them. When we correctly construct the database of NIR spectra, confirming the purpose of the analysis, suitable wood discrimination should be possible.

    DOI: 10.1007/s100860300005

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  262. Discriminant analysis of wood-based materials using near-infrared spectroscopy 査読有り

    Tsuchikawa S., Yamato K., Inoue K.

    Journal of Wood Science   49 巻 ( 3 ) 頁: 275 - 280   2003年10月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Wood Science  

    This study deals with the suitable discriminant techniques of wood-based materials by means of near-infrared spectroscopy (NIRS) and several chemometric analyses. The concept of Mahalanobis' generalized distance, K nearest neighbors (KNN), and soft independent modeling of class analogy (SIMCA) were evaluated to determine the best analytical procedure. The difference in the accuracy of classification with the spectrophotometer, the wavelength range as the explanatory variables, and the light-exposure condition of the sample were examined in detail. It was difficult to apply Mahalanobis' generalized distances to the classification of wood-based materials where NIR spectra varied widely within the sample category. The performance of KNN in the NIR region (800-2500nm), for which the device used in the laboratory was employed, exhibited a high rate of correct answers of validation (>98%) independent of the light-exposure conditions of the sample. When employing the device used in the field, both KNN and SIMCA revealed correct answers of validation (>88%) at wavelengths of 550-1010nm. These results suggest the applicability of NIRS to a reasonable classification of used wood at the factory and at job sites.

    DOI: 10.1007/s10086-002-0471-0

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  263. Discriminant analysis of wood-based materials using near-infrared spectroscopy

    Tsuchikawa Satoru, Yamato Kaori, Inoue Kinuyo

    Journal of wood science   49 巻 ( 3 ) 頁: 275 - 280   2003年6月

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    出版者・発行元:Springer  

  264. 近赤外分光法の木材非破壊検査への応用 招待有り

    土川覚

    木工機械   197 巻   頁: 2-5   2003年6月

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    担当区分:筆頭著者   記述言語:日本語  

  265. Near-infrared spectroscopic monitoring of the diffusion process of deuterium-labeled molecules in wood. Part I: Softwood

    Tsuchikawa S, Siesler HW

    APPLIED SPECTROSCOPY   57 巻 ( 6 ) 頁: 667 - 674   2003年6月

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  266. Near-infrared spectroscopic monitoring of the diffusion process of deuterium-labeled molecules in wood. Part II: hardwood. 査読有り

    Tsuchikawa S, Siesler HW

    Applied spectroscopy   57 巻 ( 6 ) 頁: 675 - 81   2003年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Spectroscopy  

    Fourier transform near-infrared (FT-NIR) transmission spectroscopy was applied to monitor the diffusion process of deuterium-labeled molecules in hardwood (Beech). The results are compared with previous data obtained on softwood (Sitka spruce) in order to consistently understand the state of order in cellulose of wood. The saturation accessibility and diffusion rate varied characteristically with the OH groups in different states of order in the wood substance, the diffusants, and the wood species, respectively. The variation of saturation accessibility should be associated with the fundamental difference of the fine structure such as the microfibrils in the wood substance. The effect of the anatomical cellular structure on the accessibility was reflected in the variation of the diffusion rate with the wood species. The size effect of the diffusants also played an important role for the diffusion process in wood. Since the volumetric percentage of wood fibers and wood rays is relatively similar, the dichroic effects due to the anisotropy of the cellulose chains were apparently diminished. Finally, we proposed a new interpretation of the fine structure of the microfibrils in the cell wall by comparing a series of results from hardwood and softwood. Each elementary fibril in the hardwood has a more homogeneous arrangement in the microfibrils compared to that in the softwood.

    DOI: 10.1366/000370203322005373

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  267. Near-infrared spectroscopic monitoring of the diffusion process of deuterium-labeled molecules in wood. Part II: Hardwood

    Tsuchikawa S, Siesler HW

    APPLIED SPECTROSCOPY   57 巻 ( 6 ) 頁: 675 - 681   2003年6月

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  268. Near-infrared spectroscopic monitoring of the diffusion process of deuterium-labeled molecules in wood. Part I: softwood. 査読有り

    Tsuchikawa S, Siesler HW

    Applied spectroscopy   57 巻 ( 6 ) 頁: 667 - 74   2003年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Spectroscopy  

    The diffusion process of several molecules (D2O, n-butanol (OD) and t-butanol (OD)) In softwood (Sitka spruce) was investigated by means of a deuterium exchange method and Fourier transform near-infrared (FT-NIR) polarization spectroscopy. The location of OH groups in different states of order of cellulose in wood was clarified by analyzing the FT-NIR transmission spectra ranging from 7200 to 6000 cm-1. Four absorption bands were assigned to 2 × ν(OH) absorptions of the amorphous regions, OH groups in semicrystalline regions, and two types of intramolecular hydrogen-bonded OH groups in the crystalline regions, respectively. The saturation level of accessibility was very different for these absorption bands (i.e., 70-80, 60, and 40-50% for the amorphous, semi-crystalline, and crystalline regions, respectively). However, the saturation accessibilities for each absorption band varied little with molecular structure and geometry of the diffusants. The diffusion rate of D2O was much faster than that of n-butanol (OD) and t-butanol (OD) for all states of orders. The size effect of the butanols led to slight differences in the diffusive transport in the crystalline regions.

    DOI: 10.1366/000370203322005364

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  269. Application of time-of-flight near-infrared spectroscopy to detect sugar and acid content in Satsuma mandarin

    Tsuchikawa S, Sakai E, Inoue K, Miyamoto K

    JOURNAL OF THE AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE   128 巻 ( 3 ) 頁: 391 - 396   2003年5月

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  270. Application of time-of-flight near-infrared spectroscopy to detect sugar and acid content in Satsuma mandarin 査読有り

    Tsuchikawa S., Sakai E., Inoue K., Miyamoto K.

    Journal of the American Society for Horticultural Science   128 巻 ( 3 ) 頁: 391 - 396   2003年5月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of the American Society for Horticultural Science  

    Time-of-flight near infrared spectroscopy (TOF-NIRS) was applied to the detection of sugar and acid content in Satuma mandarin (Citrus unshiu Marc). The combined effects on the time resolved profiles of soluble solids, free acids, laser beam wavelength, and detection position of transmitted light were investigated in detail. Attenuance of peak maxima (At) and time delay of peak maxima (Δt) increased as sugar content increased. However, these optical parameters decreased with increases in acid content. In the case of a model sample of a polyurethane block immersed in specified solutions, At and Δt decreased by adding sucrose or citric acid. These results suggested that time resolved profile was governed not only by the concentration of soluble solid or free acid but also by other inherent factors of a fruit; for example, an optical characteristic of tissue or difference in refractive index between the tissue substance and the liquid. Results indicated the optimum optical parameters for detection of sugar and acid content were At and Δt, respectively.

    DOI: 10.21273/jashs.128.3.0391

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  271. Application of Near Infrared Spectroscopy (NIR) to light-irradiated wood 査読有り

    Mitsui K, Tsuchikawa S

    HOLZ ALS ROH-UND WERKSTOFF   61 巻 ( 2 ) 頁: 159 - 160   2003年4月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Holz als Roh - und Werkstoff  

    The absorbility of water in wood varies with the light-irradiation time. Thus, near infrared spectroscopy proved to be a useful method allowing the detection of changes in chemical structure of wood after light-irradiation. In addition, it may also be suitable for the realization of a new coloring method of wood.

    DOI: 10.1007/S00107-002-0361-6

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  272. Application of near-infrared spectroscopy to wood discrimination

    Tsuchikawa Satoru, Inoue Kinuyo, Noma Junichi, HAYASHI Kazuo

    Journal of wood science   49 巻 ( 1 ) 頁: 29 - 35   2003年2月

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    出版者・発行元:Springer  

  273. Application of Near Infrared Spectroscopy to Light-Irradiated Wood 査読有り

    "Mitsui, K.; Tsuchikawa, S."

    Holz als Roh- und Werkstoff   61 巻   頁: 159-160   2003年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  274. Non-destructive NIR Spectroscopic Measurement of Antique Washi Calligraphic Scrolls 査読有り

    "Yonenobu, H.; Tsuchikawa, S."

    Journal of Near Infrared Spectroscopy   11 巻   頁: 407-411   2003年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  275. Near-Infrared Spectroscopic Comparison of Antique and Modern Wood 査読有り

    "Yonenobu, H.; Tsuchikawa, S."

    Applied Spectroscopy   57 巻 ( 11 ) 頁: 1451-1453   2003年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  276. Application of time-of-flight near infrared spectroscopy for detecting sugar content and acidity in apples 招待有り

    "Tsuchikawa, S.; Hamada, T."

    NIR news   14 巻   頁: 6-8   2003年1月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  277. Discriminant Analysis of Wood Based Materials with Weathering Damage by Near Infrared Spectroscopy 査読有り

    "Tsuchikawa, S.; Yamato, K."

    Journal of Near Infrared Spectroscopy   11 巻   頁: 391-399   2003年1月

     詳細を見る

    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  278. Near-infrared Spectroscopic monitoring of the diffusion process of deuterium-labeled molecules in wood. Part II: Hardwood 査読有り

    "Tsuchikawa, S.; Siesler, H. W."

    Applied Spectroscopy   57 巻   頁: 675-681   2003年1月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  279. Application of time-of-flight near-infrared spectroscopy for detection of sugar content and acid degrees in Satsuma Mandarin 査読有り

    "Tsuchikawa, S.; Sakai, E.; Inoue, K.; Miyamoto, K."

    Journal of American Society of Horticultural Science   128 巻   頁: 391-396   2003年1月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  280. Discriminant Analysis of Wood Based Materials using Near Infrared Spectroscopy. 査読有り

    "Tsuchikawa, S.; Yamato, K.; Inoue, K."

    Journal of Wood Science   49 巻   頁: 275-280   2003年1月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  281. Near-infrared Spectroscopic monitoring of the diffusion process of deuterium-labeled molecules in wood. Part I: Softwood 査読有り

    "Tsuchikawa, S.; Siesler, H. W."

    Applied Spectroscopy   57 巻   頁: 667-674   2003年1月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  282. Spectroscopic Monitoring of Biomass Modification by Light-Irradiation with Heat Treatment 査読有り

    "Tsuchikawa, S.; Murata, A.; Kohara, M.; Mitsui K."

    Journal of Near Infrared Spectroscopy   11 巻   頁: 401-405   2003年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  283. 光照射-熱処理による木材の強度変化

    小原 光博, 三井 勝也, 村田 明宏, 土川 覚

    岐阜大学教育学部研究報告 自然科学   28 巻 ( 1 ) 頁: 61 - 63   2003年

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    出版者・発行元:岐阜大学  

  284. 光照射-熱処理による木材表面への画像転写

    小原 光博, 三井 勝也, 村田 明宏, 土川 覚

    岐阜大学教育学部研究報告 自然科学   28 巻 ( 1 ) 頁: 57 - 60   2003年

     詳細を見る

    出版者・発行元:岐阜大学  

  285. Discriminant analysis of wood-based materials using near-infrared spectroscopy

    Tsuchikawa S, Yamato K, Inoue K

    JOURNAL OF WOOD SCIENCE   49 巻 ( 3 ) 頁: 275 - 280   2003年

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  286. Discriminant analysis of wood-based materials with weathering damage by near infrared spectroscopy

    Tsuchikawa S, Yamato K

    JOURNAL OF NEAR INFRARED SPECTROSCOPY   11 巻 ( 5 ) 頁: 391 - 399   2003年

     詳細を見る

  287. Non-destructive near infrared spectroscopic measurement of antique washi calligraphic scrolls

    Yonenobu H, Tsuchikawa S, Oda H

    JOURNAL OF NEAR INFRARED SPECTROSCOPY   11 巻 ( 5 ) 頁: 407 - 411   2003年

     詳細を見る

  288. Application of near-infrared spectroscopy to wood discrimination 査読有り

    Tsuchikawa S, Inoue K, Noma J, Hayashi K

    JOURNAL OF WOOD SCIENCE   49 巻 ( 1 ) 頁: 29 - 35   2003年

     詳細を見る

    掲載種別:研究論文(学術雑誌)  

    Web of Science

  289. Spectroscopic monitoring of biomass modification by light-irradiation and heat treatment 査読有り

    Tsuchikawa S., Murata A., Kohara M., Mitsui K.

    Journal of Near Infrared Spectroscopy   11 巻 ( 5 ) 頁: 401 - 405   2003年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Near Infrared Spectroscopy  

    This study discusses the use of near infrared spectroscopy for monitoring of the process by which biomass is modified by light-irradiation and heat treatment. As a change in the colour of wood is closely related to the change in its physicochemical structure, we investigated the relationship between the tristimulus values and the diffusely-reflected near infrared spectra of wood samples during a constrained modification process. Such basic research is required to develop a new method of colouring wood without paint. The change in colour with heat treatment was much greater in light-irradiated wood than in non-irradiated wood. The change in the colour of wood by light-irradiation and heat treatment is related to the degradation of lignin and hemicellulose, which was evident from the variation of absorption bands at 1672 nm for CH in aromatic skeletal and 1724 nm for CH in furanose or pyranose. NIR spectroscopy will become a useful method for the detection of a change in chemical structure of wood caused by light-irradiated and heat treatment.

    DOI: 10.1255/jnirs.391

    Scopus

  290. Spectroscopic monitoring of biomass modification by light-irradiation and heat treatment 査読有り

    Tsuchikawa S, Murata A, Kohara M, Mitsui K

    JOURNAL OF NEAR INFRARED SPECTROSCOPY   11 巻 ( 5 ) 頁: 401 - 405   2003年

     詳細を見る

    掲載種別:研究論文(学術雑誌)  

    Web of Science

  291. Non-destructive near infrared spectroscopic measurement of antique washi calligraphic scrolls 査読有り

    Yonenobu H., Tsuchikawa S., Oda H.

    Journal of Near Infrared Spectroscopy   11 巻 ( 5 ) 頁: 407 - 411   2003年

     詳細を見る

    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Near Infrared Spectroscopy  

    Degradation of antique washi paper was examined by non-destructive near infrared spectroscopy. Difference second derivative spectra of the modern minus antique samples were analysed for the absorption peaks due to the main chemical components of washi paper, i.e. cellulose and hemicellulose. The absorption peaks were decreased for amorphous and semi-crystalline regions of cellulose and for hemicellulose, showing the results consistent with conventional, destructive sugar analysis. It is concluded that near infrared spectroscopy is a useful technique for the non-destructive monitoring of the degradation of the chemical properties of washi paper.

    DOI: 10.1255/jnirs.392

    Scopus

  292. Discriminant analysis of wood-based materials with weathering damage by near infrared spectroscopy 査読有り

    Tsuchikawa S., Yamato K.

    Journal of Near Infrared Spectroscopy   11 巻 ( 5 ) 頁: 391 - 399   2003年

     詳細を見る

    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Near Infrared Spectroscopy  

    This research was aimed at finding a suitable discriminate technique for wood-based materials which had suffered from weathering damage, as an analogue of waste wood condition, by means of near infrared (NIR) spectroscopy and several kinds of chemometrics. The feasibility of Mahalanobis generalised distance, K nearest neighbours (KNN) or soft independent modelling of class analogy (SIMCA) as the classification method of wooden materials was examined in detail. The differences in the accuracy of classification with the spectrophotometer (for example, laboratory use and field use), pre-treatment of NIR spectra or the wavelength range as the explanatory variables were also taken into account. Five categories of wood-based materials (solid wood, laminated wood, particle or fibreboard, impregnated wood and overlaid wood) were exposed to outdoor sunlight for up to six months. It was difficult to apply Mahalanobis generalised distance to the classification of five material types where the NIR spectra varied greatly with the sample categories. Both of KNN and SIMCA presented the highest correct classification of over 93%, independent of the spectrophotometer. These results support the applicability of NIR spectroscopy to the classification of waste wood at the actual factory and job site.

    DOI: 10.1255/jnirs.390

    Scopus

  293. Application of time-of-flight near infrared spectroscopy to wood with anisotropic cellular structure. 査読有り

    "Tsuchikawa, S.; Tsutsumi, S."

    Aplied Spectroscopy   56 巻   頁: 869-876   2002年7月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  294. Application of time-of-flight near-infrared Spectroscopy to wood with anisotropic cellular structure

    Tsuchikawa S, Tsutsumi S

    APPLIED SPECTROSCOPY   56 巻 ( 7 ) 頁: 869 - 876   2002年7月

     詳細を見る

  295. Application of time-of-flight near-infrared spectroscopy to wood with anisotropic cellular structure 査読有り

    Tsuchikawa S., Tsutsumi S.

    Applied Spectroscopy   56 巻 ( 7 ) 頁: 869 - 876   2002年7月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Spectroscopy  

    The newly constructed optical measurement system, which was mainly composed of a parametric tunable laser and a near-infrared photoelectric multiplier, was introduced to clarify the optical characteristics of wood with anisotropic cellular structure on the basis of the time-of-flight near-infrared spectroscopy (TOF-NIRS). The combined effects of the cellular structure of the wood sample, the wavelength of the laser beam, and the detection position of transmitted light on the time-resolved profiles were investigated in detail. The substantial optical pathlength calculated from the time-resolved profile was outstandingly larger than the sample thickness. The substance of the wood was directly related to the time delay of light propagation. In applying TOF-NIRS to the cellular structural materials, it is very important to give attention to the difference in the light scattering within the cell wall and that caused by the multiple specular-like reflections between cell walls. The newly proposed empirical equation, considering the effects of optical parameters, could well express the wavelength and sample thickness dependency of the time delay of the peak maxima. The time-resolved profile was intensively governed by the combination of light-absorbing and -scattering conditions and the degree of anisotropy. These basic data will be essential for this system to put an in-process measurement system in the wood industry to practical use.

    DOI: 10.1366/000370202760171545

    Scopus

  296. Application of time-of-flight near-infrared spectroscopy for detecting water core in apples. 査読有り

    "Tsuchikawa, S.; Kumada, S.; Inoue, K.; Cho, R."

    Journal of American Society of Horticultural Science   127 巻   頁: 303-308   2002年3月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  297. Application of time-of-flight near-infrared spectroscopy for detecting water core in apples

    Tsuchikawa S, Kumada S, Inoue K, Cho RK

    JOURNAL OF THE AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE   127 巻 ( 2 ) 頁: 303 - 308   2002年3月

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  298. Application of near infrared spectroscopy to wood discrimination. 査読有り

    "Tsuchikawa, S.; Inoue, K.; Noma, J.; Hayashi, K."

    Journal of Wood Science   49 巻   頁: 29-35   2002年1月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  299. Non-traditional Application of Time-of-Flight Near Infrared Spectroscopy to Biological Material Having Cellular Structure

    TSUCHIKAWA Satoru

    Analytical Sciences/Supplements   17 巻 ( 0 ) 頁: i463 - i466   2002年

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    出版者・発行元:社団法人 日本分析化学会  

    DOI: 10.14891/analscisp.17icas.0.i463.0

  300. Application of time-of-flight near-infrared spectroscopy for detecting water core in apples 査読有り

    Tsuchikawa S., Kumada S., Inoue K., Cho R.K.

    Journal of the American Society for Horticultural Science   127 巻 ( 2 ) 頁: 303 - 308   2002年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of the American Society for Horticultural Science  

    Time-of-flight near-infrared spectroscopy (TOF-NIRS) was used to investigate optical characteristics of water-cored tissue in 'Fuji' apples [Malus sylvestris (L.) Mill. var. domestica (Borkh. Mansf.)]. The combined effects on the time resolved profiles of water core, laser beam wavelength, and detection position of transmitted light were investigated in detail. Attenuance of peak maxima (At), time delay of peak maxima (Δt), and variation of full width at half maximum (Δw) decreased gradually as water core increased. Water-cored tissue transmitted much more energy because of the filling of intercellular spaces with liquid, so that the light path time through a sample decreased. These parameters were also strongly dependent on detection position and wavelength of the laser beam. The substantial optical path length calculated from Δt λ = 800 nm was 10 to 17 times, while that for λ = 900 nm varied from six to 11 times the distance of the diameter of the fruit. Results indicated the optimum optical parameter for detection of water core was Δt.

    DOI: 10.21273/jashs.127.2.303

    Scopus

  301. Directional characteristics of near infrared light reflected from wood 査読有り

    Tsuchikawa S., Torii M., Tsutsumi S.

    Holzforschung   55 巻 ( 5 ) 頁: 534 - 540   2001年12月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Holzforschung  

    A near infrared auto-goniophotometer was designed to acquire detailed information on optical characteristics of a biological material which had a cellular structure, such as wood. The reflected light, which originated from the irradiation of polarized near infrared light, was separated into an unpolarized and a polarized component by using two polarizing filters. The standardized reflected intensities of each component at various incident angles θ and observation angles η, ρ,up(θ, η) and ρp(θ, η), were measured. Sitka spruce samples with various thicknesses were used. The measurements showed that the directional characteristics of the unpolarized component were affected significantly by the irradiation conditions and the sample thickness. Particularly, these varied with the wavelength of incident light λ. This shows that the directional characteristics models we proposed previously are reasonable. On the other hand, matrices of the directional characteristics for polarized components typically show an elliptical shape which is strongly affected by incident angle and only slighly by λ. Based on these results, the effects of sample thickness on the spectral directional characteristics were determined.

    DOI: 10.1515/HF.2001.086

    Scopus

  302. Non-traditional Application of Time-of-Flight Near Infrared Spectroscopy to Biological Material Having Cellular Structure 招待有り 査読有り

    Tsuchikawa S.

    Analytical Sciences   17 巻   頁: 463-466   2001年10月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  303. Directional Characteristics of Near Infrared Light Reflected from Wood 査読有り

    "Tsuchikawa, S., Torii, M. and Tsutsumi, S."

    Holzforschung   55 巻   頁: 534-540   2001年8月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  304. Analysis of macroscopic interaction between wood substance and water molecule by near infrared spectroscopy 招待有り 査読有り

    RECENT RECEARCH DEVELOPMENTS IN MATERIALS SCENCE   3 巻   頁: 269-283   2001年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  305. Directional characteristics of near infrared light reflected from wood

    Tsuchikawa S, Torii M, Tsutsumi S

    HOLZFORSCHUNG   55 巻 ( 5 ) 頁: 534 - 540   2001年

     詳細を見る

  306. 第34回名古屋国際木工機械展の概要

    土川 覚

    木材工業 = Wood industry   55 巻 ( 3 ) 頁: 118 - 121   2000年3月

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    出版者・発行元:日本木材加工技術協会  

  307. Non-traditional application of NIRS to detect physical and chemical conditions of biological materials 招待有り 査読有り

    "Tsuchikawa, S.; Tsutsumi, S."

    Recent Research Developments in Applied Spectroscopy   3 巻   頁: 113-134   2000年1月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  308. Nondestructive Measurement of Wood Properties by Using Near-Infrared Laser Radiation 査読有り

    "Tsuchikawa, S., Takahashi, T. and Tsutsumi, S."

    Forest Products Journal   50 巻   頁: 81-86   2000年1月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  309. Nondestructive measurement of wood properties by using near-infrared laser radiation

    Tsuchikawa S, Takahashi T, Tsutsumi S

    FOREST PRODUCTS JOURNAL   50 巻 ( 1 ) 頁: 81 - 86   2000年1月

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  310. Analytical characterization of reflected and transmitted light from cellular structural material for the parallel beam of NIR incident light

    Tsuchikawa S, Tsutsumi S

    APPLIED SPECTROSCOPY   53 巻 ( 9 ) 頁: 1033 - 1039   1999年9月

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  311. Analytical characterization of reflected and transmitted light from cellular structural material for the parallel beam of NIR incident light 査読有り

    Tsuchikawa S., Tsutsumi S.

    Applied Spectroscopy   53 巻 ( 9 ) 頁: 1033 - 1039   1999年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Spectroscopy  

    The results of several studies show clearly that the behavior of light transmitted in wood samples is considerably different from that of an ideal scattering medium. These observations suggest that the Kubelka-Munk theory (the K-M theory) cannot be applied directly to biological material with a cellular structure. We have developed new concepts to understand the optical characteristics of a sample having cellular structure for the illumination condition of the available spectrometers. Through a series of examinations, it became clear that the behavior of diffusely reflected light in wood was accurately described by the K-M theory. However, the behavior of its transmitted light was considerably different from that of an ideal scattering medium under the conditions of Lambert's cosine law. A two-component model of the diffusion process with respect to a parallel beam component of incident light was considered. Furthermore, the nth power cosine model of radiant intensity was introduced to be fitted for the actual state of the radiation in wood. On the basis of these optical models, the mean optical pathlength through the sample was calculated, which allowed the concept of the equivalent sample thickness to be derived. Over and above these considerations, generalized input/output equations for radiation were constructed by introducing the equivalent sample thickness into K-M equations. The absorbance calculated by such concepts agreed well with the experimental values.

    DOI: 10.1366/0003702991948026

    Scopus

  312. Directional characteristics model and light-path model for biological material having cellular structure

    Tsuchikawa S, Tsutsumi S

    APPLIED SPECTROSCOPY   53 巻 ( 2 ) 頁: 233 - 240   1999年2月

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  313. Directional Characteristics Model and Light-Path Model for Biological Material Having Cellular Structure 査読有り

    Tsuchikawa S., Tsutsumi S.

    Applied Spectroscopy   53 巻 ( 2 ) 頁: 233 - 240   1999年2月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Spectroscopy  

    Nondestructive measurements, based on NIRS (near-infrared spectroscopy), on biological material having cellular structure, such as wood, require a nontraditional approach. In this respect, a truly nondestructive measurement system that can accurately monitor the physical condition and chemical components of materials is very desirable. Supported by a series of experiments, we constructed optical characteristic concepts that account for the cellular structure of a sample. The system was successfully modeled by following theoretically the sequential propagation of light in a sample (specifically, scattering, reflection, absorption, and transmission), which varies according to the angle of the fibers with respect to the direction of incident light, θ, and with its wavelength. A set of optical models, which consists of a directional characteristics model and a light-path model, has been developed to describe the various steps in the sequence. On the basis of these models, the leakage ratios of diffusely reflected light from the aggregate width of semi-infinite tracheids, S(θ), for various conditions of irradiation were calculated. These values were in good agreement with the actual values obtained from the measured values of absorbance through the judicious use of a semi-theoretical equation.

    DOI: 10.1366/0003702991946370

    Scopus

  314. Optical models of biological materials to develop non-traditional NIR analysis 招待有り 査読有り

    "Tsuchikawa, S.; Tsutsumi, S."

    Recent Research Developments in Applied Spectroscopy   2 巻   頁: 1-18   1999年1月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  315. Directional Characteristics Model and Light-Path Model for Biological Material Having Cellular Structure 査読有り

    "Tsuchikawa, S. and Tsutsumi, S."

    Applied Spectroscopy   53 巻   頁: 233-240   1999年1月

     詳細を見る

    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  316. Analytical Characterization of Reflected and Transmitted Light from Cellular Structural Material for the Parallel Beam of NIR Incident Light 査読有り

    "Tsuchikawa, S. and Tsutsumi, S."

    Applied Spectroscopy   53 巻   頁: 1033-1039   1999年1月

     詳細を見る

    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  317. Non-traditional applications of NIRS based on the optical characteristic models for a biological material having cellular structure. 査読有り

    "Tsuchikawa, S.,"

    Journal of Near Infrared Spectroscopy   6 巻   頁: 41-46   1998年1月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  318. Adsorptive a capillary coensed water in biological material. 査読有り

    "Tsuchikawa, S, and Tsutsumi, S.,"

    Journal of Materials Science Letters   17 巻   頁: 661-663   1998年1月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  319. Directional characteristics of near-infrared light in the process of radiation a transmission from wood. 査読有り

    "Tsuchikawa, S., Torii, M., and Tsutsumi, S.,"

    Journal of Near Infrared Spectroscopy   6 巻   頁: 47-53   1998年1月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  320. Adsorptive and capillary condensed water in biological material

    Tsuchikawa S, Tsutsumi S

    JOURNAL OF MATERIALS SCIENCE LETTERS   17 巻 ( 8 ) 頁: 661 - 663   1998年

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  321. Adsorptive and capillary condensed water in biological material 査読有り

    Tsuchikawa S., Tsutsumi S.

    Journal of Materials Science Letters   17 巻 ( 8 ) 頁: 661 - 663   1998年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Materials Science Letters  

    DOI: 10.1023/A:1006672324163

    Scopus

  322. Directional characteristics of near infrared light in the process of radiation and transmission from wood 査読有り

    Tsuchikawa S., Torii M., Tsutsumi S.

    Journal of Near Infrared Spectroscopy   6 巻 ( 1-4 ) 頁: 47 - 53   1998年

     詳細を見る

    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Near Infrared Spectroscopy  

    In this report, a newly designed apparatus, that is, a near infrared auto-goniophotometer, was introduced to acquire detailed optical information about biological material having a cellular structure like wood. Such information allows us to analyse the three-dimensional physical condition of a sample and confirm the suitability of proposed optical models. The directional characteristics could be found on the basis of the intensity of reflected or transmitted light at each observation angle. In these experiments, Sitka spruce (Picea sitchensis Carr.) with various thicknesses were used. Results of these measurements showed the directional characteristics which were affected significantly by the illumination conditions and sample thickness. Particularly, these varied characteristically with the wavelength of the incident light. This result supports the validity of the proposed optical models which vary with wavelength. Throughout these analyses, the relationships between the physical aspects of a sample and the emitted light from it is being clarified.

    DOI: 10.1255/jnirs.120

    Scopus

  323. Non-traditional applications of near infrared spectroscopy based on the optical characteristic models for a biological material having cellular structure 査読有り

    Tsuchikawa S.

    Journal of Near Infrared Spectroscopy   6 巻 ( 1-4 ) 頁: 41 - 46   1998年

     詳細を見る

    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Near Infrared Spectroscopy  

    Non-destructive measurements, based on near infrared (NIR) spectroscopy, on biological material with a cellular structure like wood require a non-traditional approach. We have developed new concepts to model the optical properties of a sample having cellular structure, for the illumination conditions of the spectrometer available to us. A set of optical models, which consisted of the directional characteristics models, the light-path models and the equivalent surface roughness model was proposed to clarify the behaviour of light propagation in a wood sample. Furthermore, the mean optical path length, which was derived by incorporating the nth power cosine model of radiant intensity into the diffusion process model in consideration of the parallel beam component of incident light, was calculated. By introducing the concept of equivalent sample thickness, compatible with the mean optical path length, into the Kubelka-Munk theory, generalised input/output equations for radiation were constructed. In this non-traditional application of NIR spectroscopy, these optical concepts make it possible to analyse both the physical condition and chemical composition of a biological material with a cellular structure.

    DOI: 10.1255/jnirs.119

    Scopus

  324. Application of near infrared spectrophotometry to wood V. Calibration equations for physical conditions of wood 査読有り

    Tsuchikawa S., Tsutsumi S.

    Mokuzai Gakkaishi/Journal of the Japan Wood Research Society   43 巻 ( 2 ) 頁: 149 - 158   1997年12月

     詳細を見る

    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Mokuzai Gakkaishi/Journal of the Japan Wood Research Society  

    This paper is aimed at the non-destructive quantitative assessment of the physical conditions in bulky wood by near infrared spectrophotometry (NIRS). The calibration equations for the angles of the fibers to the direction of the incident light, θ, and the maximum height of surface roughness, R′y, were determined by a multiple linear regression analysis based on the NIR reflectance spectra. By taking the optical models into account, some sophisticated procedures to meet the situations are proposed, and the prediction error of these criterion variables are discussed. The results are summarized as follows. (1) The calibration equation for predicting θ performs enough to avoid the effect of surface roughness when the explanatory variable is selected suitably in the range of I (800-1400 nm). (2) After distinguishing whether θ is smaller or greater than 45° by the calibration equation for θ, θ is predicted accurately by suitably changing the partial regression coefficients. (3) The calibration equation for R′y is influenced characteristically by the combination of θ and wavelength λ of the explanatory valiables. R′y is predicted successfully by the partial regression coefficients corresponding to each local range of R′y. (4) For the normal measurement of NIR spectra, it is difficult to find a significant calibration equation for R′y at θ≧55°. Then, the absorbance may be measured by using a neutral density (ND) filter contacting the surface of the sample to capture more reflected light originating from the sub-surface structure.

    Scopus

  325. 近赤外分光法による木材の非破壊計測 (第5報) 試料の物理的構成に関する情報の検量線

    土川 覚, 堤 成晃

    木材学会誌   43 巻 ( 2 ) 頁: 149 - 158   1997年2月

     詳細を見る

    出版者・発行元:日本木材学会  

  326. 近赤外分光法による木材の非破壊計測(第5報)-試料の物理的構成に関する情報の検量線

    "土川 覚, 堤 成晃,"

    木材学会誌   43 巻   頁: 149-158   1997年1月

     詳細を見る

    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  327. Application of near infrared spectrophotometry to wood .5. Calibration equations for physical conditions of wood

    Tsuchikawa S, Tsutsumi S

    MOKUZAI GAKKAISHI   43 巻 ( 2 ) 頁: 149 - 158   1997年

     詳細を見る

  328. Application of near infrared spectrophotometry to wood II. Behavior of irradiated light in an aggregate of tracheids and directional characteristics of diffuse reflected and transmitted light 査読有り

    Tsuchikawa S., Tsutsumi S.

    Mokuzai Gakkaishi/Journal of the Japan Wood Research Society   42 巻 ( 4 ) 頁: 343 - 353   1996年12月

     詳細を見る

    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Mokuzai Gakkaishi/Journal of the Japan Wood Research Society  

    A series of experiments were made to apply Near Infrared Spectrophotometry (NIRS) to a non-destructive analytical method for wood. In this study, not only the determination of the compositions of materials, but also the acquirement of information relating to the physical aspects of them must be considered. Therefore, it is important to systematize the sequential propagation of light in wood, specifically, scattering, reflection, absorption, and transmission, which vary with the angles of the fibers to the directions of incident light, θ, and its wavelengths. In this study, a set of optical models, which consisted of directional characteristics models of light and light-path models, are proposed to clarify the behavior of light propagation in wood. For these models, the wood is taken as an aggregate of tracheids. The results are summarized as follows : (1) The behavior of light scattering in wood falls into three bands of the wavelengths of near infrared rays according to the trend of the absorption coefficient, K, and the scattering coefficient, S. (2) The directional characteristics models of diffusely reflected light and transmitted light, for which the aspects of K and S in three bands were taken into consideration, were proposed. (3) The light path model, which expresses the situation in regard to the emitted light from the aggregate-width of semi-infinite tracheids, is proposed. It can be found from the superposition of the light paths of diffusely reflected light at an arbitrarily chosen cell wall of semi-infinite tracheids. (4) The leakage ratio of diffusely reflected light from the aggregate-width of semi-infinite tracheids, S(θ), for various conditions of irradiation was calculated based on the optical models. These values were in good agreement with S(θ) found from the measurement value of absorbance and a second empirical equation. 2) (5) These results support theoretically the application of NIRS to a non-destructive analytical method for wood, which has some internal structure and definite order.

    Scopus

  329. Application of near infrared spectrophotometry to wood III.: Behavior of reflected and transmitted light for parallel beam of incident light 査読有り

    Tsuchikawa S., Tsursumi S.

    Mokuzai Gakkaishi/Journal of the Japan Wood Research Society   42 巻 ( 8 ) 頁: 733 - 742   1996年12月

     詳細を見る

    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Mokuzai Gakkaishi/Journal of the Japan Wood Research Society  

    This study deals with the optical problems that arise when a parallel beam of near infrared light irradiates a sample with a cellular structure like wood. The behavior of reflected and transmitted light is explained by optical characteristic models of advanced expression based on the Kubelka-Munk theory. Through a series of experiments and examinations, it became clear that the behavior of transmitted light in wood was considerably different from that of an ideal scattering medium under the conditions of Lambert's cosine law. On the other hand, the behavior of diffusely reflected light in wood can be described by the Kubelka-Munk theory. Then, the diffusion process model in consideration of the component of a parallel beam of light was considered. Furthermore, the radiant condition of wood is described flexibly by the nth power cosine model of radiant intensity. Based on these optical characteristic models, the mean optical path length through the sample was calculated from which the concept of the equivalent thickness of the sample was derived. Over and above these, the generalized input/output equations for radiation were constructed by introducing the equivalent thickness of the sample into Kubelka-Munk's equations. The absorbance calculated by the generalized input/output equations for radiation agreed well with the experimental values. This result suggests that the behavior of near infrared light in wood can be described by them. The radiant intensity characteristics of the transmitted light varied with the conditions of light absorption in the near infrared Bands II and III (1400-2500 nm), and the scattering components perpendicular to the direction of incident light increased monotonically with decreasing wavelength in the Band I (800-1400 nm). For the nondestructive measurement of wood by near infrared spectrophotometry, it is very important to find the optimum conditions by considering the optical geometry of the apparatus, the wavelength of light, and the light scattering conditions in the sample.

    Scopus

  330. Application of near infrared spectrophotometry to wood IV.: Calibration equations for moisture content 査読有り

    Tsuchikawa S., Torii M., Tsutsumi S.

    Mokuzai Gakkaishi/Journal of the Japan Wood Research Society   42 巻 ( 8 ) 頁: 743 - 754   1996年12月

     詳細を見る

    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Mokuzai Gakkaishi/Journal of the Japan Wood Research Society  

    This paper is aimed at the nondestructive quantitative assessment of the moisture condition in bulky wood by using near infrared spectrophotometry (NIRS). In the first stage of a series of experiments, the effect of moisture condition on the minimum sample thickness in which light was diffuse-reflected sufficiently, d0, was investigated. Secondly, the calibration equations for moisture conditions of some species having homogeneous water distributions; moisture contents in percents (MC), and per unit volumes (MV), were determined by multiple linear regression analysis based on the NIR reflectance spectra. Furthermore, the prediction error of moisture content for a sample having an inhomogeneous water distribution was found by which the scope of the application for actual moisture conditions in wood was investigated. Similar experiments also were made for the model samples which represented the condition of inhomogeneous water distribution to grasp the effect of water distribution in wood on the prediction error of the calibration equations. The results are summerlized as follows. (1) d0 changes in general with the moisture conditions, and the trend of do with moisture conditions varies with the wavelengths, whereas they arise from the same compounds of water. (2) When the explanatory variables and the number of them are selected suitably for the calibration equations, they perform sufficiently in predicting the moisture conditions independently of the wood species. Especially, in the case of the explanatory variables selected from the 2nd derivative spectra, the prediction error is less than that from the original spectra in both the criterion variables of MC and MV. This is noticeable in the case of the calibration equation for MC. (3) For a sample having an inhomogeneous water distribution, it is important to select the wavelengths suitably as the explanatory variables in consideration of the minimum sample thickness in which light is sufficiently diffuse-reflected. (4) A model experiment was made in which the stepwise distribution of moisture content was given to the test pieces. The thickness of the surface-side part in a sample and the difference of moisture contents between the surface-side part and the back-side part in a sample govern the predicted values of the moisture contents and the features of which are made clear.

    Scopus

  331. Near-infrared spectroscopy

    Tsuchikawa S, Hayashi K, Tsutsumi S

    APPLIED SPECTROSCOPY   50 巻 ( 9 ) 頁: 1117 - 1124   1996年9月

     詳細を見る

  332. Nondestructive measurement of the subsurface structure of biological material having cellular structure by using near-infrared spectroscopy 査読有り

    Tsuchikawa S., Hayashi K., Tsutsumi S.

    Applied Spectroscopy   50 巻 ( 9 ) 頁: 1117 - 1123   1996年9月

     詳細を見る

    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Applied Spectroscopy  

    Biological materials - wood is a typical example - are widely used in a state where not only the cellular structure but also its bulky shape is retained. NIRS (near-infrared spectroscopy) may be called for as a promising technique to analyze the physical state of such materials as well as the chemical composition. In this report, the effects of physical conditions found in wood on the absorption of NIR radiation are examined. In the experiments, conifers (Sitka spruce) that had various degrees of surface roughness and different orientations of fibers to the direction of incident light were used. Results of these measurements showed that the orientation of fibers and the surface roughness of wood were directly related to the absorbance. In addition, it became clear that the behavior of diffusely reflected light in wood could be expressed by Kubelka-Munk theory and fell into three categories according to the characteristic of the absorption and scattering coefficient. On the basis of these results, a new concept for the behavior of NIR light passing through material made of hollow fibers has been proposed.

    DOI: 10.1366/0003702963905114

    Scopus

  333. 近赤外分光法による木材の非破壊計測 (第4報) 含有水分に関する検量線

    土川 覚, 鳥居 美里, 堤 成晃

    木材学会誌   42 巻 ( 8 ) 頁: 743 - 754   1996年8月

     詳細を見る

    出版者・発行元:日本木材学会  

  334. 近赤外分光法による木材の非破壊計測(第3報)平行入射光に関する反射光および透過光の挙動

    土川 覚, 堤 成晃

    木材学会誌   42 巻 ( 8 ) 頁: 733 - 742   1996年8月

     詳細を見る

    出版者・発行元:日本木材学会  

  335. 近赤外分光法による木材の非破壊計測(第2報)近赤外照射光の仮道管群における挙動と拡散反射・透過指向特性

    土川 覚, 堤 成晃

    木材学会誌   42 巻 ( 4 ) 頁: 343 - 353   1996年4月

     詳細を見る

    出版者・発行元:日本木材学会  

  336. Noestructive Measurement of the Subsurface Structure of Biological Material Having Cellular Structure by Using Near-Infrared Spectroscopy. 査読有り

    "Tsuchikawa, S., Hayashi, K., and Tsutsumi, S.,"

    Applied Spectroscopy   50 巻   頁: 1117-1124   1996年1月

     詳細を見る

    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  337. 近赤外分光法による木材の非破壊計測(第4報)-含有水分に関する検量線 査読有り

    "土川 覚, 鳥居美里, 堤 成晃,"

    木材学会誌   42 巻   頁: 743-754   1996年1月

     詳細を見る

    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  338. 近赤外分光法による木材の非破壊計測(第3報)-平行入射光に関する反射光および透過光の挙動 査読有り

    "土川 覚, 堤 成晃,"

    木材学会誌   42 巻   頁: 733-742   1996年1月

     詳細を見る

    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  339. 近赤外分光法による木材の非破壊計測(第2報)-近赤外照射光の仮道管群における挙動と拡散反射・透過指向特性 査読有り

    "土川 覚, 堤 成晃,"

    木材学会誌   42 巻   頁: 343-353   1996年1月

     詳細を見る

    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  340. Application of near infrared spectrophotometry to wood .2. Behavior of irradiated light in an aggregate of tracheids and directional characteristics of diffuse reflected and transmitted light

    Tsuchikawa S, Tsutsumi S

    MOKUZAI GAKKAISHI   42 巻 ( 4 ) 頁: 343 - 353   1996年

     詳細を見る

  341. Application of near infrared spectrophotometry to wood .4. Calibration equations for moisture content

    Tsuchikawa S, Torii M, Tsutsumi S

    MOKUZAI GAKKAISHI   42 巻 ( 8 ) 頁: 743 - 754   1996年

     詳細を見る

  342. Application of near infrared spectrophotometry to wood .3. Behavior of reflected and transmitted light for parallel beam of incident light

    Tsuchikawa S, Tsutsumi S

    MOKUZAI GAKKAISHI   42 巻 ( 8 ) 頁: 733 - 742   1996年

     詳細を見る

  343. 回転丸のこの振動特性(第5報)歯数およびスリットの振動振幅、放射音への影響 査読有り

    木材学会誌   40 巻 ( 12 ) 頁: 148   1994年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  344. 回転丸のこの振動特性(第3報)非線形振動および連成振動について 査読有り

    木材学会誌   39 巻 ( 7 ) 頁: 776   1993年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  345. 回転丸のこの振動特性(第4報)共振振動数の非線形性について 査読有り

    木材学会誌   39 巻 ( 7 ) 頁: 783   1993年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  346. VIBRATION CHARACTERISTICS OF A ROTATING CIRCULAR-SAW .3. NONLINEAR VIBRATION AND COUPLED VIBRATION

    YOKOCHI H, TSUCHIKAWA S, KIMURA S

    MOKUZAI GAKKAISHI   39 巻 ( 7 ) 頁: 776 - 782   1993年

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  347. VIBRATION CHARACTERISTICS OF A ROTATING CIRCULAR-SAW .4. NONLINEAR RESONANT-FREQUENCY

    YOKOCHI H, TSUCHIKAWA S, KIMURA S

    MOKUZAI GAKKAISHI   39 巻 ( 7 ) 頁: 783 - 787   1993年

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  348. 近赤外分光法による木材の非破壊計測(第1報)試料表面構造の影響 査読有り

    木材学会誌   38 巻 ( 2 ) 頁: 128   1992年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  349. APPLICATION OF NEAR-INFRARED SPECTROPHOTOMETRY TO WOOD .1. EFFECTS OF THE SURFACE-STRUCTURE

    TSUCHIKAWA S, HAYASHI K, TSUTSUMI S

    MOKUZAI GAKKAISHI   38 巻 ( 2 ) 頁: 128 - 136   1992年

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  350. Application of Near Infrared Spectrophotometry to the Determination of Fiber Orientation and Moisture Content of Wood. 査読有り

    MOKUZAI GAKKAISHI   37 巻 ( 8 ) 頁: 758   1991年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  351. APPLICATION OF NEAR-INFRARED SPECTROPHOTOMETRY TO THE DETERMINATION OF FIBER ORIENTATION AND MOISTURE-CONTENT OF WOOD

    TSUCHIKAWA S, HAYASHI K, TSUTSUMI S

    MOKUZAI GAKKAISHI   37 巻 ( 8 ) 頁: 758 - 760   1991年

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  352. 鋸歯モデルを有する円板の振動特性および円板周縁まわりの流れ特性(第1報) 査読有り

    木材学会誌   36 巻 ( 11 ) 頁: 936   1990年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  353. CHARACTERISTICS OF THE VIBRATION OF DISKS WITH MODEL TEETH AND THE FLOWS AROUND THE DISKS .1. RATIOS OF SPACE TO WIDTH OF SQUARE POLES

    YOKOCHI H, TSUCHIKAWA S, KIMURA S

    MOKUZAI GAKKAISHI   36 巻 ( 11 ) 頁: 936 - 943   1990年

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  354. 回転丸のこの振動特性(第2報)Lock-in現象 査読有り

    木材学会誌   35 巻 ( 4 ) 頁: 306   1989年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  355. 回転丸のこの振動特性(第1報)前進波と後進波の振幅の相違 査読有り

    木材学会誌   34 巻 ( 6 ) 頁: 491   1988年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

▼全件表示

書籍等出版物 63

  1. Near-infrared spectroscopy : theory, spectral analysis, instrumentation, and applications 国際共著

    尾崎 幸洋, Huck Christian, 土川 覚, Engelsen Søren Balling( 担当: 共編者(共編著者))

    Springer Nature Singapore  2021年  ( ISBN:9789811586477

     詳細を見る

    記述言語:英語 著書種別:学術書

  2. Near-Infrared Spectroscopy

    ( 担当: 共編者(共編著者))

    Springer  2020年12月  ( ISBN:978-981-15-8647-7

     詳細を見る

    記述言語:英語 著書種別:学術書

  3. The Encyclopedia of Archaeological Sciences

    Satoru Tsuchikawa, Te Ma, Tetsuya Inagaki( 担当: 共著)

    John Wiley & Sons  2018年11月  ( ISBN:9781119188230

     詳細を見る

    担当ページ:1-3   記述言語:英語 著書種別:事典・辞書

  4. The Encyclopedia of Archaeological Sciences

    Satoru Tsuchikawa, Te Ma, Tetsuya Inagaki( 担当: 共著)

    John Wiley & Sons  2018年11月  ( ISBN:9781119188230

     詳細を見る

    記述言語:英語 著書種別:事典・辞書

  5. 食品と開発「近赤外分光法による農産物・食品の分析と評価」

    土川 覚( 担当: 単著)

    UBMメディア  2015年 

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    記述言語:日本語

  6. 光アライアンス「分光イメージング法による食品混入異物の検査」

    土川 覚、馬 特、小堀 光、片山詔久( 担当: 共著)

    日本工業出版  2015年 

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    記述言語:日本語

  7. 分光イメージング法を活用した食品混入異物の非破壊検査

    土川 覚、馬 特、小堀 光、片山詔久( 担当: 共著)

    日本オプトメカトロニクス協会  2015年 

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    記述言語:日本語

  8. 「第5章 農業・食品分析」、分光法シリーズ2-近赤外分光法

    土川 覚( 担当: 単著)

    講談社  2015年 

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    記述言語:日本語 著書種別:学術書

  9. 「第5章 農業・食品分析」、分光法シリーズ2-近赤外分光法

    土川 覚( 担当: 単著)

    講談社  2015年 

     詳細を見る

    担当ページ:179-199   記述言語:日本語 著書種別:学術書

  10. 光アライアンス「分光イメージング法による食品混入異物の検査」

    土川 覚, 馬 特, 小堀 光, 片山詔久( 担当: 共著)

    日本工業出版  2015年 

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    担当ページ:37-41   記述言語:日本語 著書種別:学術書

  11. 食品と開発「近赤外分光法による農産物・食品の分析と評価」

    土川 覚( 担当: 単著)

    UBMメディア  2015年 

     詳細を見る

    担当ページ:4-6   記述言語:日本語 著書種別:学術書

  12. 近赤外分光法

    尾崎 幸洋, 森澤 勇介, 森田 成昭, 新澤 英之, 二見 能資, 池羽田 晶文, 佐藤 春実, 源川 拓磨, 土川 覚, 大塚 誠, 作道 章一, 石川 大太郎

    講談社  2015年  ( ISBN:9784061569027

  13. 分光イメージング法を活用した食品混入異物の非破壊検査

    土川 覚, 馬 特, 小堀 光, 片山詔久( 担当: 共著)

    日本オプトメカトロニクス協会  2015年 

     詳細を見る

    担当ページ:24-28   記述言語:日本語 著書種別:学術書

  14. 分光画像解析による食品異物混入の非破壊検査 表面近傍の有機異物検出の可能性

    土川 覚、馬 特、小堀 光、片山詔久( 担当: 共著)

    日本工業出版  2014年8月 

     詳細を見る

    記述言語:日本語

  15. 分光画像解析による食品異物混入の非破壊検査 表面近傍の有機異物検出の可能性

    土川 覚, 馬 特, 小堀 光, 片山詔久( 担当: 共著)

    日本工業出版  2014年8月 

     詳細を見る

    担当ページ:35-38   記述言語:日本語 著書種別:学術書

  16. 生命・環境科学のための 物理学

    土川 覚, 佐々木康寿、山本浩之、横地秀行( 担当: 共著)

    東京教学社  2013年10月  ( ISBN:978-4-8082-2070-9

     詳細を見る

    記述言語:日本語

  17. 生命・環境科学のための 物理学

    土川 覚, 佐々木康寿, 山本浩之, 横地秀行( 担当: 共著)

    東京教学社  2013年10月  ( ISBN:9784808220709

     詳細を見る

    担当ページ:1-156   記述言語:日本語 著書種別:学術書

  18. Using NIR for Grading Timber

    ( 担当: 共著)

    Wood Technology Research Centre  2013年10月  ( ISBN:978-0-473-26662-2

     詳細を見る

    記述言語:英語

  19. Using NIR for Grading Timber

    Tsuchikawa, S, Kobori, H( 担当: 共著)

    Wood Technology Research Centre  2013年10月  ( ISBN:9780473266622

     詳細を見る

    担当ページ:49-53   記述言語:英語 著書種別:学術書

  20. 生命・環境科学のための物理学

    土川 覚, 佐々木 康寿, 山本 浩之 , 横地 秀行

    東京教学社  2013年  ( ISBN:9784808220709

  21. ケモメトリカルNIRイメージング法による木質系廃材分別システムの構築

    土川 覚

    [出版者不明]  2007年 

  22. Characterization of the Cellulosic Cell Wall, Blackwell Publishing

    Tsuchikawa, S.; Siesler, H. W.( 担当: 共著)

    Blackwell Publishing  2006年 

     詳細を見る

    記述言語:英語

    Near-infrared Spectroscopic Monitoring of the Diffusion Process of Deuterium-Labeled Molecules in Wood

  23. Near-Infrared Spectroscopy in Food Science and Technology

    Tsuchikawa S.( 担当: 単著)

    Wiley-Interscience  2006年 

     詳細を見る

    記述言語:英語

    Sampling Techniques

  24. Near-Infrared Spectroscopy in Food Science and Technology

    Tsuchikawa S.; McClure, W. F.( 担当: 共著)

    Wiley-Interscience  2006年 

     詳細を見る

    記述言語:英語

    Time-of-Flight Spectroscopy

  25. Near-Infrared Spectroscopy in Food Science and Technology

    McClure, W. F.; Tsuchikawa S.( 担当: 共著)

    Wiley-Interscience  2006年 

     詳細を見る

    記述言語:英語

    Instrumentations

  26. Characterization of the Cellulosic Cell Wall, Blackwell Publishing

    Tsuchikawa, S, Siesler, H. W( 担当: 共著)

    Blackwell Publishing  2006年 

     詳細を見る

    担当ページ:123-137   記述言語:英語 著書種別:学術書

    Near-infrared Spectroscopic Monitoring of the Diffusion Process of Deuterium-Labeled Molecules in Wood

  27. Near-Infrared Spectroscopy in Food Science and Technology

    McClure, W. F, Tsuchikawa S( 担当: 共著)

    Wiley-Interscience  2006年 

     詳細を見る

    担当ページ:75-107   記述言語:英語 著書種別:学術書

    Instrumentations

  28. Near-Infrared Spectroscopy in Food Science and Technology

    McClure, W. F, Tsuchikawa S( 担当: 共著)

    Wiley-Interscience  2006年 

     詳細を見る

    担当ページ:75-107   記述言語:英語 著書種別:学術書

    Instrumentations

  29. Near-Infrared Spectroscopy in Food Science and Technology

    Tsuchikawa S( 担当: 単著)

    Wiley-Interscience  2006年 

     詳細を見る

    担当ページ:133-143   記述言語:英語 著書種別:学術書

    Sampling Techniques

  30. Useful and Advanced Information in the Field of Near Infrared Spectroscopy

    "Tsuchikawa, S.(EDITOR:Tsuchikawa, S.)"( 担当: 単著)

    Research Signpost  2004年 

     詳細を見る

    記述言語:英語

  31. Useful and Advanced Information in the Field of Near Infrared Spectroscopy

    Tsuchikawa, S.(EDITOR, Tsuchikawa( 担当: 単著)

    Research Signpost  2004年 

     詳細を見る

    担当ページ:293-307   記述言語:英語 著書種別:学術書

    本著書では、2000年代以降のさまざまな分野での近赤外分光法の適用事例がトピック的に紹介されている。合計17編の報告から構成されているが、いずれも本著書のために書き下ろされた研究報告である。

  32. Proceedings of the first European conference on wood modification

    "Mitsui, K.; Murata, A.; Kohara, M.; Tsuchikawa, S.( EDITOR:)"( 担当: 共著)

    2003年 

     詳細を見る

    記述言語:英語

    Color modification of wood by light-irradiation and heat treatment

  33. Useful and advanced information in the field of near infrared spectroscopy

    土川 覚

    Research Signpost  2003年  ( ISBN:8177360841

  34. Proceedings of the first European conference on wood modification

    Mitsui, K, Murata, A, Kohara, M, Tsuchikawa, S.( EDITOR( 担当: 共著)

    2003年 

     詳細を見る

    担当ページ:43-52   記述言語:英語 著書種別:学術書

    Color modification of wood by light-irradiation and heat treatment

  35. 岐阜県生活技術研究所研究報告

    "三井勝也,村田明宏,土川覚,小原光博"( 担当: 共著)

    2002年1月 

     詳細を見る

    記述言語:日本語

    環境低負荷型木材着色システムの構築(第2報)波長・透過率の影響

  36. 岐阜県生活技術研究所研究報告

    三井勝也, 村田明宏, 土川覚, 小原光博( 担当: 共著)

    2002年1月 

     詳細を見る

    担当ページ:44-48   記述言語:日本語 著書種別:学術書

    環境低負荷型木材着色システムの構築(第2報)波長・透過率の影響

  37. Near Infrared Spectroscopy. Proceedings of the 10th International Conference

    "Tsuchikawa, S.; Tsutsumi, S.( EDITOR:Davies, A.M.C.; Cho, R.)"( 担当: 共著)

    NIR Publications  2002年 

     詳細を見る

    記述言語:英語

    Application of time-of-flight near infrared spectroscopy to wood.

  38. Wood Structure and Properties ’02

    "Mitsui, K.; Murata, A.; Tsuchikawa, S.; Kohara, M.( EDITOR:)"( 担当: 共著)

    Arbora Publishers  2002年 

     詳細を見る

    記述言語:英語

    Changes in the color of light-irradiated wood with heat treatment: Print of photograph onto wood

  39. Near Infrared Spectroscopy: Proceedings of the 10th International Conference

    "Tsuchikawa, S.; Hamada, T.; Inoue K.; Cho, R.( EDITOR:Davies, A.M.C.; Cho, R.)"( 担当: 共著)

    NIR Publications  2002年 

     詳細を見る

    記述言語:英語

    Application of time-of-flight near infrared spectroscopy to apples.

  40. Near Infrared Spectroscopy: Proceedings of the 10th International Conference

    "Tsuchikawa, S.; Ito, S.; Inoue K.; Miyamoto, K.( EDITOR:Davies, A.M.C.; Cho R.)"( 担当: 共著)

    NIR Publications  2002年 

     詳細を見る

    記述言語:英語

    Application of time-of-flight near infrared spectroscopy to Satsuma mandarin.

  41. Wood Structure and Properties ’02

    Mitsui, K, Murata, A, Tsuchikawa, S, Kohara, M, EDITOR( 担当: 共著)

    Arbora Publishers  2002年 

     詳細を見る

    担当ページ:105-108   記述言語:英語 著書種別:学術書

    Changes in the color of light-irradiated wood with heat treatment: Print of photograph onto wood

  42. Near Infrared Spectroscopy. Proceedings of the 10th International Conference

    Tsuchikawa, S, Tsutsumi, S, EDITOR, Davies, A.M.C, Cho, R( 担当: 共著)

    NIR Publications  2002年 

     詳細を見る

    担当ページ:423-426   記述言語:英語 著書種別:学術書

    Application of time-of-flight near infrared spectroscopy to wood.

  43. Near Infrared Spectroscopy: Proceedings of the 10th International Conference

    Tsuchikawa, S, Hamada, T, Inoue K, Cho, R, EDITOR, Davies, A.M.C, Cho, R( 担当: 共著)

    NIR Publications  2002年 

     詳細を見る

    担当ページ:367-370   記述言語:英語 著書種別:学術書

    Application of time-of-flight near infrared spectroscopy to apples.

  44. Near Infrared Spectroscopy: Proceedings of the 10th International Conference

    Tsuchikawa, S, Hamada, T, Inoue K, Cho, R, EDITOR, Davies, A.M.C, Cho, R( 担当: 共著)

    NIR Publications  2002年 

     詳細を見る

    担当ページ:367-370   記述言語:英語 著書種別:学術書

    Application of time-of-flight near infrared spectroscopy to apples.

  45. Time-resolved near infrared spectroscopy for wood as a discontinuous body with anisotropic cellular structure

    ( 担当: 共著)

    Near Infrared Spectroscopy: Proceedings of the 9th International Conference  2000年 

     詳細を見る

    記述言語:英語

  46. Time-resolved near infrared spectroscopy for spherical particles as a discontinuous body with isotropic fine structure

    ( 担当: 共著)

    Near Infrared Spectroscopy: Proceedings of the 9th International Conference  2000年 

     詳細を見る

    記述言語:英語

  47. 第34回名古屋国際木工機械展の概要

    ( 担当: 単著)

    木材工業  2000年 

     詳細を見る

    記述言語:日本語

  48. The effect of the moisture condition of bulk wood on transmitted output power from a semiconductor near infrared laser

    ( 担当: 共著)

    Near Infrared Spectroscopy: Proceedings of the 9th International Conference  2000年 

     詳細を見る

    記述言語:英語

  49. The effect of the moisture condition of bulk wood on transmitted output power from a semiconductor near infrared laser

    土川 覚( 担当: 共著)

    Near Infrared Spectroscopy: Proceedings of the 9th International Conference  2000年 

     詳細を見る

    担当ページ:53-58   記述言語:英語 著書種別:学術書

  50. Time-resolved near infrared spectroscopy for spherical particles as a discontinuous body with isotropic fine structure

    土川 覚( 担当: 共著)

    Near Infrared Spectroscopy: Proceedings of the 9th International Conference  2000年 

     詳細を見る

    担当ページ:89-94   記述言語:英語 著書種別:学術書

  51. Time-resolved near infrared spectroscopy for wood as a discontinuous body with anisotropic cellular structure

    土川 覚( 担当: 共著)

    Near Infrared Spectroscopy: Proceedings of the 9th International Conference  2000年 

     詳細を見る

    担当ページ:95-100   記述言語:英語 著書種別:学術書

  52. 第34回名古屋国際木工機械展の概要

    土川 覚( 担当: 単著)

    木材工業  2000年 

     詳細を見る

    担当ページ:118   記述言語:日本語 著書種別:学術書

  53. 実用分光法シリーズⅢ-近赤外分光法

    "土川 覚, 堤 成晃( 編:尾崎幸洋編)"( 担当: 共著)

    アイピーシー出版  1998年 

     詳細を見る

    記述言語:日本語

    木材分野への応用

  54. 実用分光法シリーズⅢ-近赤外分光法

    土川 覚, 堤 成晃, 尾崎幸洋編( 担当: 共著)

    アイピーシー出版  1998年 

     詳細を見る

    担当ページ:234-250   記述言語:日本語 著書種別:学術書

    木材分野への応用

  55. 近赤外分光法による木材の非破壊計測

    土川 覚

    [出版者不明]  1997年 

  56. 近赤外分光法による木材の繊維走行ならびに含水率のイオンプロセス計測

    堤 成晃, 林 和男, 土川 覚

    [出版者不明]  1996年 

  57. Application of Near Infrared Spectroscopy to Wood Machining

    ( 担当: 共著)

    Proceedings of The 12th International Wood Machining Seminar  1995年 

     詳細を見る

    記述言語:英語

  58. Application of Near Infrared Spectroscopy to Wood Machining

    土川 覚( 担当: 共著)

    Proceedings of The 12th International Wood Machining Seminar  1995年 

     詳細を見る

    担当ページ:230   記述言語:英語 著書種別:学術書

  59. Application of NIRS to wood.

    ( 担当: 共著)

    Making Light Work : Advances in Near infrared Spectrascopy VCH  1992年 

     詳細を見る

    記述言語:英語

  60. Application of NIRS to wood.

    土川 覚( 担当: 共著)

    Making Light Work : Advances in Near infrared Spectrascopy VCH  1992年 

     詳細を見る

    担当ページ:569   記述言語:英語 著書種別:学術書

  61. Characteristics of the Vibration of Disks with Model Teeth and the Flows around the Disks I. Ratios of space to width of square poles

    ( 担当: 共著)

    Proceedings of the 10th International Wood Machinoing Seminar  1991年 

     詳細を見る

    記述言語:英語

  62. Characteristics of the Vibration of Disks with Model Teeth and the Flows around the Disks I. Ratios of space to width of square poles

    土川 覚( 担当: 共著)

    Proceedings of the 10th International Wood Machinoing Seminar  1991年 

     詳細を見る

    担当ページ:124   記述言語:英語 著書種別:学術書

  63. Characterization of Split Vibration Modes in Circular Saws「(共著)」

    ( 担当: 共著)

    Proceedings of the 9th International Wood Machining Seminar  1988年 

     詳細を見る

    記述言語:英語

▼全件表示

MISC 99

  1. Modulus of elasticity prediction model on sugi (Cryptomeria japonica) lumber using online near-infrared (NIR) spectroscopic system 査読有り

    Imran Arrad Sofianto, Tetsuya Inagaki, Kouchi Kato, Mariya Itoh, Satoru Tsuchikawa  

    International Wood Products Journal8 巻 ( 4 ) 頁: 193 - 200   2017年10月

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)   出版者・発行元:Taylor and Francis Ltd.  

    In this study, static bending measurements and online NIR spectra acquisitions were combined to construct modulus of elasticity (MOE) prediction model for sugi lumber. NIR spectra were acquired from tangential surface of sugi lumbers at a speed of 120 m min−1 to assess its effectiveness in the wood industry. Cross-validation partial least squares regression (CV-PLSR) and test-set-validation partial least squares regression (TSV-PLSR) analyses were employed for analysing the data. The second derivative (2d) spectra with 19 smoothing points (Savitzky–Golay algorithm, second polynomial) gave the best result as spectral pre-processing treatment with the lowest root mean square error of cross-validation and the highest coefficient of determination for cross-validation based on the optimum number of latent variables as assessed from the minimum validation residual variance value in the CV-PLSR analysis. These 2d spectra were then used in the TSV-PLSR analysis for 100 repetitions to check the robustness of the calibration.

    DOI: 10.1080/20426445.2017.1378398

    Scopus

  2. Modulus of elasticity prediction model on sugi (Cryptomeria japonica) lumber using online near-infrared (NIR) spectroscopic system

    Imran Arrad Sofianto, Tetsuya Inagaki, Kouchi Kato, Mariya Itoh, Satoru Tsuchikawa  

    International Wood Products Journal8 巻 ( 4 ) 頁: 193 - 200   2017年10月

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)   出版者・発行元:Taylor and Francis Ltd.  

    In this study, static bending measurements and online NIR spectra acquisitions were combined to construct modulus of elasticity (MOE) prediction model for sugi lumber. NIR spectra were acquired from tangential surface of sugi lumbers at a speed of 120 m min−1 to assess its effectiveness in the wood industry. Cross-validation partial least squares regression (CV-PLSR) and test-set-validation partial least squares regression (TSV-PLSR) analyses were employed for analysing the data. The second derivative (2d) spectra with 19 smoothing points (Savitzky–Golay algorithm, second polynomial) gave the best result as spectral pre-processing treatment with the lowest root mean square error of cross-validation and the highest coefficient of determination for cross-validation based on the optimum number of latent variables as assessed from the minimum validation residual variance value in the CV-PLSR analysis. These 2d spectra were then used in the TSV-PLSR analysis for 100 repetitions to check the robustness of the calibration.

    DOI: 10.1080/20426445.2017.1378398

    Scopus

  3. Stiffness and Moisture Content Prediction Model of Wooden Veneer Using Fast Online Near-Infrared (NIR) Spectroscopic System 査読有り

    Sofianto, I. A, Inagaki, T, Itoh, M, Tsuchikawa, S  

    Forestry Research and Engineering: International Journal1 巻 ( 2 ) 頁: 1-5   2017年9月

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  4. High spatial resolution and non-destructive evaluation of wood density and microfibril angle by NIR hyperspectral imaging 招待有り

    Ma, T, Inagaki, T, Tsuchikawa, S  

    NIR news28 巻 ( 5 ) 頁: 7-12   2017年6月

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  5. The effect of path length, light intensity and co-added time on the detection limit associated with NIR spectroscopy of potassium hydrogen phthalate in aqueous solution 査読有り

    Tetsuya Inagaki, Tomoko Watanabe, Satoru Tsuchikawa  

    PLOS ONE12 巻 ( 5 ) 頁: https://doi.org/10.1371/journa   2017年5月

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)   出版者・発行元:PUBLIC LIBRARY SCIENCE  

    Near infrared (NIR) spectroscopy is a common means of non-invasively determining the concentrations of organic compounds in relatively transparent aqueous solutions. Rigorous determination for limit of detection (LOD) is of importance for the application use of NIR spectroscopy. The work reported herein determined the LOD with the analysis of potassium hydrogen phthalate (KHP) in water with partial least square (PLS) calibration in the range of 6300 - 5800 cm (-1) between the two strong absorption bands of water, in which the C-H overtone bands of KHP are located. A comparison of the LOD estimated when using various condition (path length, aperture and co-added scan times) showed that the lowest LOD for KHP obtained with a fiber optic cable attachment equipped NIR spectrometer is approximately 150 ppm.

    DOI: 10.1371/journal.pone.0176920

    Web of Science

  6. The effect of path length, light intensity and co-added time on the detection limit associated with NIR spectroscopy of potassium hydrogen phthalate in aqueous solution

    Tetsuya Inagaki, Tomoko Watanabe, Satoru Tsuchikawa  

    PLOS ONE12 巻 ( 5 ) 頁: e0176920   2017年5月

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)   出版者・発行元:PUBLIC LIBRARY SCIENCE  

    Near infrared (NIR) spectroscopy is a common means of non-invasively determining the concentrations of organic compounds in relatively transparent aqueous solutions. Rigorous determination for limit of detection (LOD) is of importance for the application use of NIR spectroscopy. The work reported herein determined the LOD with the analysis of potassium hydrogen phthalate (KHP) in water with partial least square (PLS) calibration in the range of 6300 - 5800 cm (-1) between the two strong absorption bands of water, in which the C-H overtone bands of KHP are located. A comparison of the LOD estimated when using various condition (path length, aperture and co-added scan times) showed that the lowest LOD for KHP obtained with a fiber optic cable attachment equipped NIR spectrometer is approximately 150 ppm.

    DOI: 10.1371/journal.pone.0176920

    Web of Science

    PubMed

  7. Classification of mung bean seeds for sprout production using near-infrared spectroscopy and hyperspectral imaging 査読有り

    Phuangsombut, K, Terdwongworakul, A, Suttiwijitpukdee, N, Phuangsombut A, Tsuchikawa S, Inagaki T, Ma T  

    Thai Society of Agricultural Engineering Journal23 巻 ( 1 ) 頁: 23-29   2017年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  8. Dynamic behavior of wood chemical components under drying process measured by near-infrared spectroscopy 査読有り

    Sugii, S, Fujimoto, T, Tsutsumi, H, Inagaki, T, Tsuchikawa, S  

    Journal of Near Infrared Spectroscopy25 巻 ( 6 ) 頁: 400-406   2017年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  9. Segregating wood wastes by repetitive principal component analysis of near infrared spectra 査読有り

    Kobori, H, Higa, S, Tsuchikawa, S, Kojima, Y, Suzuki, S  

    Journal of Near Infrared Spectroscopy25 巻 ( 3 ) 頁: 180-187   2017年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  10. Temperature dependence of wood photodegradation monitored by infrared spectroscopy 査読有り

    Varga, D, Tolvaj, L, Tsuchikawa, S, Bejoc, L, Prekleta, E  

    Journal of Photochemistry and Photobiology A: Chemistry348 巻   頁: 219-225   2017年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  11. Determination of true optical absorption and scattering coefficient of wooden cell wall substance by time-of-flight near infrared spectroscopy 査読有り

    Kitamura, R, Inagaki, T, Tsuchikawa, S  

    Optic Express24 巻 ( 4 ) 頁: 3999-4009   2016年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  12. Optical properties of drying wood studied by time-resolved near-infrared spectroscopy 査読有り

    Konagaya, K, Inagaki, T, Kitamura, R, Tsuchikawa, S  

    Optic Express24 巻 ( 9 ) 頁: 9561-9573   2016年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  13. Three fiber-based diffuse reflectance spectroscopy for estimation of total solid content in natural rubber latex 査読有り

    Inagaki, T, Nozawa, D, Shimomura, Y, Tsuchikawa S  

    Journal of Near Infrared Spectroscopy24 巻   頁: 327-335   2016年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  14. 近赤外分光法を用いた紙中の木材パルプの複合的評価手法の開発 査読有り

    河部千香, 深沢博之, 稲垣 哲也, 土川 覚  

    紙パ技協誌71 巻 ( 3 ) 頁: 318-325   2016年

     詳細を見る

    記述言語:日本語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  15. A Review of Recent Application of Near Infrared Spectroscopy to Wood Science and Technology 招待有り 査読有り

    Tsuchikawa, S, Kobori, H  

    Journal of Wood Science61 巻   頁: 213-230   2015年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  16. Combined effects of UV light and elevated temperatures on wood discolouration 査読有り

    Tolvaj, L, Tsuchikawa, S, Inagaki T, Varga, D  

    Wood Science and Technology49 巻 ( 6 ) 頁: 1225-1237   2015年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  17. Simultaneous prediction of density and moisture content of wood by terahertz time domain spectroscopy

    Inagaki, T, Ahmed, B, Hartley, I. D, Tsuchikawa, S, Reid, M  

    Journal of Infrared, Millimeter, and Terahertz Waves35 巻 ( 11 ) 頁: 949-961   2014年11月

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  18. A review of near-infrared spectroscopy for monitoring moisture content and density of solid wood 査読有り

    Leblon, B, Adedipe, O, Hans, G, Haddadi1, A, Tsuchikawa, S, Burger; J, Stirling, R, Pirouz, Z, Groves, K, Nader, J, LaRocque, A  

    The Forestry Chronicle89 巻 ( 5 ) 頁: 595-606   2013年

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  19. A Review of Recent Near Infrared Research for Wood and Paper Part 2 招待有り 査読有り

    Tsuchikawa, S, Schwanninger, S  

    Applied Spectroscopy Review48 巻   頁: 560-587   2013年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  20. Applicability of Vis-NIR hyperspectral imaging for monitoring wood moisture content (MC) 査読有り

    Kobori, H, Gorretta, N, Rabatel, G, Bellon-Maurel, V, Chaix, G, Roger, J.-M, Tsuchikawa, S  

    Holzforschung67 巻 ( 3 ) 頁: 307-314   2013年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  21. Prediction of wood density using near infrared-based partial least squares regression models calibrated with X-ray microdensity

    Rodrigues, J. C, Fujimoto, T, Schwanninger, M, Tsuchikawa, S  

    NIR News24 巻 ( 2 ) 頁: 4-5,8   2013年

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  22. Mapping of Leaf Water Content Using Near-Infrared Hyperspectral Imaging", Applied Spectroscopy 査読有り

    Higa, S, Kobori, H, Tsuchikawa, S  

    Applied Spectroscopy67 巻 ( 11 ) 頁: 1302-1307   2013年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  23. High accuracy rapid prediction and feasibility of on-site nondestructive estimation of Para rubber quality by spectroscopic method 査読有り

    Inagaki, T, Sirisomboon, P, Liu, C, Thanapase, W, Tsuchikawa, S  

    Journal of Wood Science59 巻   頁: 119-126   2013年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  24. Establishment of near infrared archaeometry 招待有り 査読有り

    Inagaki, T, Tsuchikawa, S  

    NIR News24 巻 ( 7 ) 頁: 4-6   2013年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  25. Time of Flight Near Infrared Spectroscopy for Nondestructive Measurement of internal quality in Grapefruit 査読有り

    Kurata, Y, Tsuchida, T, Tsuchikawa, S  

    Journal of American Society of Horticultural Science138 巻   頁: 225-228   2013年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  26. Vis-NIR Spectroscopy for the On-site Prediction of Wood Properties 査読有り

    Kobori, H, Kojima, M, Yamamoto, H, Sasaki, Y, Yamaji, F. M, Tsuchikawa, S  

    The Forestry Chronicle89 巻 ( 5 ) 頁: 36-43   2013年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  27. Time-Resolved Principal Component Imaging Analysis of Chlorophyll Fluorescence Induction for Monitoring Leaf Water Stress 査読有り

    Kobori, H, Tsuchikawa, S  

    Applied Spectroscopy67 巻 ( 6 ) 頁: 594-599   2013年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  28. Eucalyptus camaldulensis density and fiber length estimated by near infrared spectroscopy 査読有り

    Inagaki, T, Schwanninger, S, Kato, R, Kurata1, Y, Thanapase, W, Puthson, P, Tsuchikawa, S  

    Wood Science and Technology46 巻   頁: 143-155   2012年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  29. Prediction of wood density independent of moisture conditions using near infrared spectroscopy

    Fujimoto, T, Kobori, H, Tsuchikawa, S  

    Journal of Near Infrared Spectroscopy20 巻 ( 3 ) 頁: 353-359   2012年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  30. Rapid prediction of past climate condition from lake sediments by NIR spectroscopy 査読有り

    Inagaki, T, Shinozuka, Y, Yamada, K, Yonenobu, H, Tsuchikawa, S, Yoshida, A, Hoshino, Y, Gotanda, K, Yasuda, Y  

    Applied Spectroscopy66 巻 ( 6 ) 頁: 673-679   2012年

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  31. 広帯域分光方式による革新的な木材多形質高速非破壊測定装置の開発 招待有り

    土川 覚  

    Techno Innovation84 巻   頁: 19-23   2012年

     詳細を見る

    記述言語:日本語   掲載種別:記事・総説・解説・論説等(学術雑誌)  

  32. リグナ・ハノーバー2011名古屋大学ブース出展報告 招待有り 査読有り

    土川 覚  

    木材工業67 巻 ( 2 ) 頁: 81-84   2012年

     詳細を見る

    記述言語:日本語   掲載種別:機関テクニカルレポート,技術報告書,プレプリント等  

  33. Application of NIR spectroscopy to wood products

    Tsuchikawa S, Fujimoto, T  

    Proceedings of 17th International Nondestructive Testing and Evaluation of Wood Symposium   頁: 665-671   2011年

     詳細を見る

    記述言語:英語   掲載種別:研究発表ペーパー・要旨(全国大会,その他学術会議)  

  34. Optical characteristics of wood investigated by time-of-flight near infrared spectroscopy 査読有り

    Kurata, Y, Fujimoto, T, Tsuchikawa S  

    Holzforschung65 巻   頁: 389-395   2011年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  35. 近赤外分光法による木質材料の非破壊計測 -現状と展望- 招待有り 査読有り

    土川 覚  

    木材工業66 巻 ( 10 ) 頁: 430-435   2011年

     詳細を見る

    記述言語:日本語   掲載種別:記事・総説・解説・論説等(学術雑誌)  

  36. Difference of the crystal structure of cellulose in wood after hydrothermal and ageing degradation: A NIR spectroscopy and XRD study 査読有り

    Inagaki, T, Siesler, H, Mitsui, K, Tsuchikawa, S  

    Biomacromolecules11 巻   頁: 2300-2306   2010年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  37. Near Infrared Spectroscopic Assessment of Contamination Level of Sewage 査読有り

    Inagaki, T, Shinoda Y, Miyazawa, M, Takamura H, Tsuchikawa S  

    Water Science and Technology61 巻 ( 8 ) 頁: 1957-1963   2010年

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  38. Identification of dead and sound knots by near infrared spectroscopy 招待有り 査読有り

    Fujimoto, T, Tsuchikawa, S  

    Journal of Near Infrared Spectroscopy18 巻   2010年

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  39. Feasibility of near infrared spectroscopy for on-line multi-traits assessment of sawn lumber 査読有り

    Fujimoto, T, Kurata, Y, Matsumoto, K, Tsuchikawa, S  

    Journal of Wood Science56 巻   2010年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  40. Feasibility of near infrared spectroscopy for on-line grading of sawn lumber 査読有り

    Fujimoto, T, Kurata, Y, Matsumoto, K, Tsuchikawa, S  

    Applied Spectroscopy64 巻   2010年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  41. Effect of Crosscutting Sugi (Cryptomeria japonica D. Don) Logs on Sawing Yield and Quality of Sawn Lumber", Forest Products Journal 査読有り

    Ikami, Y, Matsumura, Y, Murata, K, Tsuchikawa S  

    Forest Products Journal60 巻 ( 3 ) 頁: 244-248   2010年

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  42. Near Infrared Spectroscopic Investigation of Hydrothermal Degradation Mechanism of Wood as an Analogue of Archaeological Object. Part-II: Hardwood 査読有り

    Inagaki, T, Mitsui, K, Tsuchikawa S  

    Applied Spectroscopy63 巻 ( 7 ) 頁: 753-758   2009年7月

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  43. Application of time-of-flight near infrared spectroscopy to fruits -Analysis of absorption/scattering condition of NIR radiation by cross-correlation function of time-resolved profile- 査読有り

    Kurata, Y, Tsuchikawa S  

    Applied Spectroscopy63 巻 ( 3 ) 頁: 306-312   2009年3月

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  44. Influence of pith location on warp of lumber in sawing medium quality Sugi (Cryptomeria japonica D. Don) logs 査読有り

    Ikami, Y, Matsumura, Y, Murata, K, Tsuchikawa S  

    Holz als Roh- und Werkstoff67 巻 ( 3 ) 頁: 271-276   2009年3月

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  45. Near-infrared spectroscopic analysis of aging degradation in antique washi paper using a deuterium exchange method 招待有り 査読有り

    Yonenobu, H, Sato, K, Tsuchikawa, S  

    Vibrational Spectroscopy51 巻   頁: 100-104   2009年

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  46. Prediction of water content in Ligustrum japonicum leaf using NIR chemometric imaging 査読有り

    Kobori, H, Tsuchikawa S  

    Journal of Near Infrared Spectroscopy17 巻 ( 3 ) 頁: 151-157   2009年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  47. Near Infrared Spectroscopic Investigation of Hydrothermal Degradation Mechanism of Wood as an Analogue of Archaeological Object. Part-I: Softwood 査読有り

    Inagaki, T, Mitsui, K, Tsuchikawa S  

    Applied Spectroscopy62 巻 ( 11 )   2008年11月

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  48. *Discriminant Analyzing System for Wood Wastes Using A Vis-NIR Chemometrical Imaging Technique 査読有り

    Kobori, H, Yonenobu, H, Tsuchikawa S  

    Applied Spectroscopy62 巻 ( 8 ) 頁: 854-859   2008年8月

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

    可視近赤外ケモメトリカル画像処理法を提案し、これによって木質廃材を高精度で判別する手順について紹介した。

  49. *NIR spectroscopic monitoring of water adsorption/desorption process in modern and archaeological wood" 査読有り

    Inagaki, T, Yonenobu, H, Tsuchikawa S  

    Applied Spectroscopy62 巻 ( 8 ) 頁: 861-865   2008年

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

    現生木と古材の水分吸着状況の違いを近赤外分光法に基づいて詳細に検討した。学内共同研究者:稲垣哲也

  50. *Application of time-of-flight near infrared spectroscopy to fruits -Permeability of pulsed laser into Satsuma mandarin, White grapefruit and Fuji apple- 査読有り

    Kurata, Y, Ikemoto, Y, Tsuchikawa S  

    Journal of Near Infrared Spectroscopy16 巻   頁: 139-142   2008年

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

    時間飛行近赤外分光法を果実の光計測に応用し、内部品質評価の可能性を検討した。学内共同研究者:倉田洋平、池本有香

  51. Application of near infrared spectroscopy for estimating wood mechanical properties of small clear and full length lumber specimens 査読有り

    Fujimoto, T, Kurata, Y, Matsumoto, K, Tsuchikawa, S  

    Journal of Near Infrared Spectroscopy16 巻   頁: 529-537   2008年

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  52. Monitoring of Hydroxyl Groups in Wood during Heat Treatment Using NIR Spectroscopy 査読有り

    Mitsui, K, Inagaki, T, Tsuchikawa S  

    Biomacromolecules9 巻   頁: 286-288   2008年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  53. Estimation of Sawn Face Width of Sugi (Cryptomeria japonica D. Don) Logs by Cross-Sectional Shape with Approximation Profile 査読有り

    Ikami, Y, Matsumura, Y, Murata, K, Tsuchikawa S  

    Holz als Roh- und Werkstoff66 巻 ( 4 ) 頁: 243-247   2008年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  54. Estimation of Wood Stiffness and Strength Properties of Hybrid Larch by Near-infrared Spectroscopy", Applied Spectroscopy 査読有り

    Fujimoto, T, Yamamoto, H, Tsuchikawa, S  

    Applied Spectroscopy61 巻 ( 8 ) 頁: 882-888   2007年8月

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  55. *A Review of Recent Near Infrared Research for Wood and Paper 招待有り 査読有り

    Tsuchikawa, S  

    Applied Spectroscopy Review42 巻 ( 1 ) 頁: 43-71   2007年

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    記述言語:英語   掲載種別:記事・総説・解説・論説等(学術雑誌)  

    本論文は、1990年代以降急速に広まった木材科学・工業分野への近赤外分光法の適用事例を網羅的に紹介した総説形式のものである。約150の文献が、詳細に紹介されている。

  56. *Near-infrared spectroscopic observation of the ageing process in archaeological wood using a deuterium exchange method 査読有り

    Tsuchikawa, S, Yonenobu, H, Siesler, H. W  

    The Analyst130 巻   頁: 379-384   2005年

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

    本論文では、重水素置換法と近赤外分光法を組み合わせた新しい手法によって、木材の経年劣化様式を分子レベルで詳細に観察し、細胞壁内におけるセルロースミクロフィブリル間の間隙寸法のオングストロームオーダの経年変化状況を把握することに成功した。これによって、NIR-Archeometryとも呼ぶべき新しい考古計測学手法の基盤が確立された。

  57. Application of near infrared spectroscopy to assessments of colour change in plantation-grown Eucalyptus grandis wood subjected to heat and steaming treatments 査読有り

    Wu Y.Q, Tsuchikawa S, Hayashi K  

    Journal of Near Infrared Spectroscopy13 巻   頁: 371-376   2005年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  58. Rapid assessment of wood chemical properties and pulp yield of Eucalyptus camaldulensis in Thailand tree plantation by near infrared spectroscopy aiming high quality pulp wood selection 査読有り

    Terdwongworakul, A, Punsuwan, V, Thanapase, W, Tsuchikawa, S  

    Journal of Wood Science51 巻   頁: 167-171   2005年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  59. Near-infrared spectroscopic study of the physical and mechanical properties of wood with meso- and micro-scale anatomical observation 査読有り

    Tsuchikawa, S, Hirashima, Y, Sasaki, Y, Ando, K  

    Applied Spectroscopy59 巻 ( 1 ) 頁: 78-85   2005年

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

    本論文では、木材の強度特性を支配する諸因子を分光学的に非破壊で推定することを試み、系統的な実験とケモメトリックス的な解析によって密度、縦弾性係数および引張応力が高精度で推定可能となることを明らかにした。また、その理論的根拠を明らかにすることによって、新しい測定手法としての基盤を形成することに成功した。

  60. Spectroscopic Monitoring of Wood Characteristics Variation by Light-Irradiation 査読有り

    Tsuchikawa, S, Inoue, K, Mitsui K  

    Forest Products Journal54 巻   頁: 71-76   2004年1月

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  61. Application of Time-of-Flight Near Infrared Spectroscopy for Detecting Sugar and Acid Contents in Apples 査読有り

    Tsuchikawa, S, Hamada, T  

    Journal of Agricultural and Food Chemistry52 巻 ( 9 ) 頁: 2434-2439   2004年

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

    本論文では、光伝播の強度・時間変化をナノ秒オーダで詳細に把握することによって、試料内部情報を非破壊で検出する時間飛行近赤外分光法(TOF-NIRS)を世界で初めて提案するとともに、これをリンゴの糖度・酸度検出に適応し、既存の手法では達し得なかった精度で推定可能となることを示した。

  62. Wood Photography Using Light-Irradiation and Heat Treatment 査読有り

    Mitsui, K, Murata, A, Tsuchikawa, S, Kohara M  

    Color Research and Application29 巻 ( 4 ) 頁: 312-315   2004年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  63. 近赤外分光法による木質系廃棄物の判別分析 招待有り

    土川覚, 山登香織  

    木材保存29 巻   頁: 259-262   2003年11月

     詳細を見る

    記述言語:日本語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  64. 近赤外分光法の木材非破壊検査への応用 招待有り

    土川覚  

    木工機械197 巻   頁: 2-5   2003年6月

     詳細を見る

    記述言語:日本語   掲載種別:記事・総説・解説・論説等(学術雑誌)  

  65. Application of Near Infrared Spectroscopy to Light-Irradiated Wood 査読有り

    Mitsui, K, Tsuchikawa, S  

    Holz als Roh- und Werkstoff61 巻   頁: 159-160   2003年1月

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  66. Non-destructive NIR Spectroscopic Measurement of Antique Washi Calligraphic Scrolls 査読有り

    Yonenobu, H, Tsuchikawa, S  

    Journal of Near Infrared Spectroscopy11 巻   頁: 407-411   2003年1月

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  67. Near-infrared Spectroscopic monitoring of the diffusion process of deuterium-labeled molecules in wood. Part II: Hardwood 査読有り

    Tsuchikawa, S, Siesler, H. W  

    Applied Spectroscopy57 巻   頁: 675-681   2003年1月

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  68. Near-infrared Spectroscopic monitoring of the diffusion process of deuterium-labeled molecules in wood. Part I: Softwood 査読有り

    Tsuchikawa, S, Siesler, H. W  

    Applied Spectroscopy57 巻   頁: 667-674   2003年1月

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  69. Near-Infrared Spectroscopic Comparison of Antique and Modern Wood 査読有り

    Yonenobu, H, Tsuchikawa, S  

    Applied Spectroscopy57 巻 ( 11 ) 頁: 1451-1453   2003年1月

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  70. Discriminant Analysis of Wood Based Materials with Weathering Damage by Near Infrared Spectroscopy 査読有り

    Tsuchikawa, S, Yamato, K  

    Journal of Near Infrared Spectroscopy11 巻   頁: 391-399   2003年1月

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  71. Discriminant Analysis of Wood Based Materials using Near Infrared Spectroscopy. 査読有り

    Tsuchikawa, S, Yamato, K, Inoue, K  

    Journal of Wood Science49 巻   頁: 275-280   2003年1月

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  72. Application of time-of-flight near-infrared spectroscopy for detection of sugar content and acid degrees in Satsuma Mandarin 査読有り

    Tsuchikawa, S, Sakai, E, Inoue, K, Miyamoto, K  

    Journal of American Society of Horticultural Science128 巻   頁: 391-396   2003年1月

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  73. Application of time-of-flight near infrared spectroscopy for detecting sugar content and acidity in apples 招待有り

    Tsuchikawa, S, Hamada, T  

    NIR news14 巻   頁: 6-8   2003年1月

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  74. Spectroscopic Monitoring of Biomass Modification by Light-Irradiation with Heat Treatment 査読有り

    Tsuchikawa, S, Murata, A, Kohara, M, Mitsui K  

    Journal of Near Infrared Spectroscopy11 巻   頁: 401-405   2003年

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  75. Application of time-of-flight near infrared spectroscopy to wood with anisotropic cellular structure. 査読有り

    Tsuchikawa, S, Tsutsumi, S  

    Aplied Spectroscopy56 巻   頁: 869-876   2002年7月

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  76. Application of time-of-flight near-infrared spectroscopy for detecting water core in apples. 査読有り

    Tsuchikawa, S, Kumada, S, Inoue, K, Cho, R  

    Journal of American Society of Horticultural Science127 巻   頁: 303-308   2002年3月

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  77. Application of near infrared spectroscopy to wood discrimination. 査読有り

    Tsuchikawa, S, Inoue, K, Noma, J, Hayashi, K  

    Journal of Wood Science49 巻   頁: 29-35   2002年1月

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  78. Non-traditional Application of Time-of-Flight Near Infrared Spectroscopy to Biological Material Having Cellular Structure 招待有り 査読有り

    Tsuchikawa S  

    Analytical Sciences17 巻   頁: 463-466   2001年10月

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  79. Directional Characteristics of Near Infrared Light Reflected from Wood 査読有り

    Tsuchikawa, S, Torii, M, Tsutsumi, S  

    Holzforschung55 巻   頁: 534-540   2001年8月

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  80. Analysis of macroscopic interaction between wood substance and water molecule by near infrared spectroscopy 招待有り 査読有り

    RECENT RECEARCH DEVELOPMENTS IN MATERIALS SCENCE3 巻   頁: 269-283   2001年

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  81. Non-traditional application of NIRS to detect physical and chemical conditions of biological materials 招待有り 査読有り

    Tsuchikawa, S, Tsutsumi, S  

    Recent Research Developments in Applied Spectroscopy3 巻   頁: 113-134   2000年1月

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  82. Nondestructive Measurement of Wood Properties by Using Near-Infrared Laser Radiation 査読有り

    Tsuchikawa, S, Takahashi, T, Tsutsumi, S  

    Forest Products Journal50 巻   頁: 81-86   2000年1月

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  83. Analytical Characterization of Reflected and Transmitted Light from Cellular Structural Material for the Parallel Beam of NIR Incident Light 査読有り

    Tsuchikawa, S, Tsutsumi, S  

    Applied Spectroscopy53 巻   頁: 1033-1039   1999年1月

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  84. Optical models of biological materials to develop non-traditional NIR analysis 招待有り 査読有り

    Tsuchikawa, S, Tsutsumi, S  

    Recent Research Developments in Applied Spectroscopy2 巻   頁: 1-18   1999年1月

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  85. Directional Characteristics Model and Light-Path Model for Biological Material Having Cellular Structure 査読有り

    Tsuchikawa, S, Tsutsumi, S  

    Applied Spectroscopy53 巻   頁: 233-240   1999年1月

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  86. Adsorptive a capillary coensed water in biological material. 査読有り

    Tsuchikawa, S, Tsutsumi, S  

    Journal of Materials Science Letters17 巻   頁: 661-663   1998年1月

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  87. Non-traditional applications of NIRS based on the optical characteristic models for a biological material having cellular structure. 査読有り

    Tsuchikawa, S  

    Journal of Near Infrared Spectroscopy6 巻   頁: 41-46   1998年1月

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  88. Directional characteristics of near-infrared light in the process of radiation a transmission from wood. 査読有り

    Tsuchikawa, S, Torii, M, Tsutsumi, S  

    Journal of Near Infrared Spectroscopy6 巻   頁: 47-53   1998年1月

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  89. 近赤外分光法による木材の非破壊計測(第5報)-試料の物理的構成に関する情報の検量線

    土川 覚, 堤 成晃  

    木材学会誌43 巻   頁: 149-158   1997年1月

     詳細を見る

    記述言語:日本語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  90. Noestructive Measurement of the Subsurface Structure of Biological Material Having Cellular Structure by Using Near-Infrared Spectroscopy. 査読有り

    Tsuchikawa, S, Hayashi, K, Tsutsumi, S  

    Applied Spectroscopy50 巻   頁: 1117-1124   1996年1月

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  91. 近赤外分光法による木材の非破壊計測(第2報)-近赤外照射光の仮道管群における挙動と拡散反射・透過指向特性 査読有り

    土川 覚, 堤 成晃  

    木材学会誌42 巻   頁: 343-353   1996年1月

     詳細を見る

    記述言語:日本語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  92. 近赤外分光法による木材の非破壊計測(第4報)-含有水分に関する検量線 査読有り

    土川 覚, 鳥居美里, 堤 成晃  

    木材学会誌42 巻   頁: 743-754   1996年1月

     詳細を見る

    記述言語:日本語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  93. 近赤外分光法による木材の非破壊計測(第3報)-平行入射光に関する反射光および透過光の挙動 査読有り

    土川 覚, 堤 成晃  

    木材学会誌42 巻   頁: 733-742   1996年1月

     詳細を見る

    記述言語:日本語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  94. 回転丸のこの振動特性(第5報)歯数およびスリットの振動振幅、放射音への影響 査読有り

    木材学会誌40 巻 ( 12 ) 頁: 148   1994年

     詳細を見る

    記述言語:日本語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  95. 回転丸のこの振動特性(第3報)非線形振動および連成振動について 査読有り

    木材学会誌39 巻 ( 7 ) 頁: 776   1993年

     詳細を見る

    記述言語:日本語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  96. 回転丸のこの振動特性(第4報)共振振動数の非線形性について 査読有り

    木材学会誌39 巻 ( 7 ) 頁: 783   1993年

     詳細を見る

    記述言語:日本語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  97. 近赤外分光法による木材の非破壊計測(第1報)試料表面構造の影響 査読有り

    木材学会誌38 巻 ( 2 ) 頁: 128   1992年

     詳細を見る

    記述言語:日本語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  98. Application of Near Infrared Spectrophotometry to the Determination of Fiber Orientation and Moisture Content of Wood. 査読有り

    木材学会誌37 巻 ( 8 ) 頁: 758   1991年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  99. 鋸歯モデルを有する円板の振動特性および円板周縁まわりの流れ特性(第1報) 査読有り

    木材学会誌36 巻 ( 11 ) 頁: 936   1990年

     詳細を見る

    記述言語:日本語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

▼全件表示

講演・口頭発表等 41

  1. 異分野との接点が生み出す新学問 -木質材料の近赤外分光計測を例として- 招待有り

    土川 覚

    第33回近赤外フォーラム 

     詳細を見る

    開催年月日: 2017年11月

    記述言語:日本語   会議種別:口頭発表(招待・特別)  

    開催地:筑波大学   国名:日本国  

  2. 近赤外分光計測の過去・現在・未来 招待有り

    土川 覚

    光産業技術マンスリーセミナー 

     詳細を見る

    開催年月日: 2017年8月

    記述言語:日本語   会議種別:口頭発表(招待・特別)  

    開催地:東京   国名:日本国  

  3. NIR Spectroscopy at Work in Wood Science and Technology 招待有り 国際会議

    Satoru Tsuchikawa

    18th International Conference on Near Infrared Spectroscopy  

     詳細を見る

    開催年月日: 2017年6月

    記述言語:英語   会議種別:口頭発表(招待・特別)  

    国名:デンマーク王国  

  4. Status, Limit, and Future of NIR technology as Agricultural Spectroscopy 招待有り 国際会議

    Satoru Tsuchikawa

    EuroPACT 2017  

     詳細を見る

    開催年月日: 2017年5月

    記述言語:英語   会議種別:口頭発表(招待・特別)  

    国名:ドイツ連邦共和国  

  5. Application of NIR Spectroscopy to Wood Science and Technology 招待有り 国際会議

    Satoru Tsuchikawa

    Workshop: Application of NIR spectroscopy for wood science and technology research 

     詳細を見る

    開催年月日: 2014年4月

    記述言語:英語   会議種別:口頭発表(一般)  

    開催地:CNR-IVALSA   国名:イタリア共和国  

  6. Application of NIR Spectroscopy to Wood Science and Technology 国際会議

    Tsuchikawa, S., Kobori, H.

    ICAVS-2013 

     詳細を見る

    開催年月日: 2013年8月

    記述言語:英語   会議種別:口頭発表(招待・特別)  

    国名:日本国  

  7. USING NIR FOR GRADING TIMBER 国際会議

    Tsuchikawa, S.; Kobori, H.

    Workshop on Commercial Application of IR Spectroscopies to Solid Wood, Wood Technology 

     詳細を見る

    開催年月日: 2013年6月

    記述言語:英語   会議種別:口頭発表(招待・特別)  

    国名:ニュージーランド  

  8. Development of NIR technique as cellulosic spectroscopy 国際会議

    S. Tsuchikawa

    The Second International Conference on Natural Polymers 

     詳細を見る

    開催年月日: 2010年9月

    記述言語:英語   会議種別:口頭発表(招待・特別)  

  9. NIR Spectroscopy of Wood 国際会議

    Buechi Consumer Meeting 

     詳細を見る

    開催年月日: 2003年10月

    記述言語:英語   会議種別:口頭発表(招待・特別)  

    Zollferain Essen Germany

  10. Near-Infrared Spectroscopic Monitoring of the Diffusion Process of Deuterium-Labeled Molecules in Wood 国際会議

    Characterization of the Cellulosic Cell Wall 

     詳細を見る

    開催年月日: 2003年8月

    記述言語:英語   会議種別:口頭発表(招待・特別)  

    Grand Lake Lodge Grand Lake U.S.A.

  11. ドイツにおける近赤外分光法の現状

    "土川覚,H. W. Siesler"

    弟18回非破壊計測シンポジウム 

     詳細を見る

    開催年月日: 2002年11月

    記述言語:日本語   会議種別:口頭発表(招待・特別)  

    "文部科学省研究交流センター, つくば市"

  12. 近赤外スペクトルの解析

    土川覚

    弟18回非破壊計測シンポジウム 

     詳細を見る

    開催年月日: 2002年11月

    記述言語:日本語   会議種別:口頭発表(招待・特別)  

    "文部科学省研究交流センター, つくば市"

  13. 第10回国際近赤外分光分析会議の報告

    土川 覚

    第17回非破壊計測シンポジウム 

     詳細を見る

    開催年月日: 2001年11月

    記述言語:日本語   会議種別:口頭発表(招待・特別)  

    国名:日本国  

    "研究交流センター, つくば"

  14. 時間飛行近赤外分光法によるミカンの光計測

    "土川 覚,伊藤さとみ,井上絹代,宮本久美"

    第17回非破壊計測シンポジウム 

     詳細を見る

    開催年月日: 2001年11月

    記述言語:日本語   会議種別:ポスター発表  

    国名:日本国  

  15. Non-Traditional Application of Time-of-Flight Near Infrared Spectroscopy to Biological Material Having cellular Structure, IUPAC International Congress on Analytical Sciences, August 6-10, 2001, Tokyo, Japan, Invited Lecture

     詳細を見る

    開催年月日: 2001年

    記述言語:英語   会議種別:口頭発表(招待・特別)  

  16. Construction of a new optical model and application of time resolved NIR for biological materials with cellular structure, 9th International Diffuse Reflectance Conference, August 7-14, 1998, Chambertburg, U.S.A., Invited Lecture 国際会議

     詳細を見る

    開催年月日: 1998年8月

    記述言語:英語   会議種別:口頭発表(招待・特別)  

  17. Non-Traditional Application of NIRS Based on the Optical Characteristic Models for a Biological Material Having Cellular Structure,The 8th International Conference on NIR Spectroscopy, September 15-19, 1997, Essen, Germany, Invited Lecture 国際会議

     詳細を見る

    開催年月日: 1997年9月

    記述言語:英語   会議種別:口頭発表(招待・特別)  

  18. Inspection of Microfibril Angle of Sugi Wood by THz-TDS

    Wang H.

    International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz  2018年10月25日  International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz

     詳細を見る

  19. Quality Evaluation of Engineered Wood by THz-TDS

    Kashima M.

    International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz  2018年10月25日  International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz

     詳細を見る

  20. 異分野との接点が生み出す新学問 -木質材料の近赤外分光計測を例として- 招待有り 国際会議

    土川 覚

    第33回近赤外フォーラム  2017年11月15日 

     詳細を見る

    記述言語:日本語   会議種別:口頭発表(招待・特別)  

    開催地:筑波大学  

  21. 近赤外分光計測の過去・現在・未来 招待有り 国際会議

    土川 覚

    光産業技術マンスリーセミナー  2017年8月22日 

     詳細を見る

    記述言語:日本語   会議種別:口頭発表(招待・特別)  

    開催地:東京  

  22. NIR Spectroscopy at Work in Wood Science and Technology 招待有り

    Satoru Tsuchikawa

    18th International Conference on Near Infrared Spectroscopy  2017年6月11日 

     詳細を見る

    記述言語:英語   会議種別:口頭発表(招待・特別)  

    開催地:コペンハーゲン  

  23. Status, Limit, and Future of NIR technology as Agricultural Spectroscopy 招待有り

    Satoru Tsuchikawa

    EuroPACT 2017  2017年5月10日 

     詳細を見る

    記述言語:英語   会議種別:口頭発表(招待・特別)  

    開催地:ポツダム  

  24. Estimation of wood density, moisture content and fiber orientation by THz time domain spectroscopy

    Inagaki T.

    28th International Conference on Wood Science and Technology, ICWST 2017: Implementation of Wood Science in Woodworking Sector  2017年  28th International Conference on Wood Science and Technology, ICWST 2017: Implementation of Wood Science in Woodworking Sector

     詳細を見る

  25. Determination of optical parameters and moisture content of wood with visible-near infrared spectroscopy

    Haddadi A.

    Journal of Near Infrared Spectroscopy  2016年  Journal of Near Infrared Spectroscopy

     詳細を見る

  26. NIR spectroscopic evaluation of nitrogen and carbon content in Japanese Mustard Spinach (Brassica rapa var. perviridis)

    Inagaki T.

    2015 54th Annual Conference of the Society of Instrument and Control Engineers of Japan, SICE 2015  2015年9月30日  2015 54th Annual Conference of the Society of Instrument and Control Engineers of Japan, SICE 2015

     詳細を見る

  27. Application of NIR Spectroscopy to Wood Science and Technology 招待有り

    Satoru Tsuchikawa

    Workshop: Application of NIR spectroscopy for wood science and technology research  2014年4月15日 

     詳細を見る

    記述言語:英語   会議種別:口頭発表(一般)  

    開催地:CNR-IVALSA  

  28. Application of NIR Spectroscopy to Wood Science and Technology

    Tsuchikawa, S, Kobori, H

    ICAVS-2013  2013年8月25日 

     詳細を見る

    記述言語:英語   会議種別:口頭発表(招待・特別)  

  29. USING NIR FOR GRADING TIMBER

    Tsuchikawa, S, Kobori, H

    Workshop on Commercial Application of IR Spectroscopies to Solid Wood, Wood Technology  2013年6月11日 

     詳細を見る

    記述言語:英語   会議種別:口頭発表(招待・特別)  

  30. Enhanced on-line stress grading of sawn lumber using near infrared spectroscopy

    Fujimoto T.

    11th World Conference on Timber Engineering 2010, WCTE 2010  2010年12月  11th World Conference on Timber Engineering 2010, WCTE 2010

     詳細を見る

  31. Development of NIR technique as cellulosic spectroscopy

    S. Tsuchikawa

    The Second International Conference on Natural Polymers  2010年9月24日 

     詳細を見る

    記述言語:英語   会議種別:口頭発表(招待・特別)  

  32. Rapid and nondestructive evaluations of wood mechanical properties by near infrared spectroscopy

    Fujimoto T.

    10th World Conference on Timber Engineering 2008  2008年12月  10th World Conference on Timber Engineering 2008

     詳細を見る

  33. NIR Spectroscopy of Wood

    Tsuchikawa, S, Siesler, H. W

    Buechi Consumer Meeting  2003年10月14日 

     詳細を見る

    記述言語:英語   会議種別:口頭発表(招待・特別)  

    Zollferain Essen Germany

  34. Near-Infrared Spectroscopic Monitoring of the Diffusion Process of Deuterium-Labeled Molecules in Wood

    Tsuchikawa, S, Siesler, H. W

    Characterization of the Cellulosic Cell Wall  2003年8月27日 

     詳細を見る

    記述言語:英語   会議種別:口頭発表(招待・特別)  

    Grand Lake Lodge Grand Lake U.S.A.

  35. ドイツにおける近赤外分光法の現状 国際会議

    土川覚, H. W. Siesler

    弟18回非破壊計測シンポジウム  2002年11月15日 

     詳細を見る

    記述言語:日本語   会議種別:口頭発表(招待・特別)  

    "文部科学省研究交流センター, つくば市"

  36. 近赤外スペクトルの解析 国際会議

    土川覚

    弟18回非破壊計測シンポジウム  2002年11月13日 

     詳細を見る

    記述言語:日本語   会議種別:口頭発表(招待・特別)  

    "文部科学省研究交流センター, つくば市"

  37. 第10回国際近赤外分光分析会議の報告 国際会議

    土川 覚

    第17回非破壊計測シンポジウム  2001年11月16日 

     詳細を見る

    記述言語:日本語   会議種別:口頭発表(招待・特別)  

    "研究交流センター, つくば"

  38. 時間飛行近赤外分光法によるミカンの光計測 国際会議

    土川 覚, 伊藤さとみ, 井上絹代, 宮本久美

    第17回非破壊計測シンポジウム  2001年11月14日 

     詳細を見る

    記述言語:日本語   会議種別:ポスター発表  

  39. Non-Traditional Application of Time-of-Flight Near Infrared Spectroscopy to Biological Material Having cellular Structure, IUPAC International Congress on Analytical Sciences, August 6-10, 2001, Tokyo, Japan, Invited Lecture 国際会議

    土川 覚

    Non-Traditional Application of Time-of-Flight Near Infrared Spectroscopy to Biological Material Having cellular Structure, IUPAC International Congress on Analytical Sciences, August 6-10, 2001, Tokyo, Japan, Invited Lecture  2001年  日本分析化学会

     詳細を見る

    記述言語:英語   会議種別:口頭発表(招待・特別)  

  40. Construction of a new optical model and application of time resolved NIR for biological materials with cellular structure, 9th International Diffuse Reflectance Conference, August 7-14, 1998, Chambertburg, U.S.A., Invited Lecture

    土川 覚

    Construction of a new optical model and application of time resolved NIR for biological materials with cellular structure, 9th International Diffuse Reflectance Conference, August 7-14, 1998, Chambertburg, U.S.A., Invited Lecture  1998年8月 

     詳細を見る

    記述言語:英語   会議種別:口頭発表(招待・特別)  

  41. Non-Traditional Application of NIRS Based on the Optical Characteristic Models for a Biological Material Having Cellular Structure,The 8th International Conference on NIR Spectroscopy, September 15-19, 1997, Essen, Germany, Invited Lecture

    土川 覚

    Non-Traditional Application of NIRS Based on the Optical Characteristic Models for a Biological Material Having Cellular Structure,The 8th International Conference on NIR Spectroscopy, September 15-19, 1997, Essen, Germany, Invited Lecture  1997年9月 

     詳細を見る

    記述言語:英語   会議種別:口頭発表(招待・特別)  

▼全件表示

共同研究・競争的資金等の研究課題 16

  1. ICT 活用農業事業化・普及プロジェクト

    2014年 - 2017年3月

    革新的技術創造促進事業(異分野融合共同研究) 

      詳細を見る

    資金種別:競争的資金

  2. NIR及びテラヘルツ画像処理技術及びデータベースの構築

    2010年8月 - 現在

    愛知県 知の拠点事業 

      詳細を見る

    資金種別:競争的資金

  3. 広帯域分光方式による革新的な木材多形質高速非破壊測定装置の開発

    2010年7月 - 2013年3月

    新たな農林水産政策を推進する実用技術開発事業 

      詳細を見る

    資金種別:競争的資金

  4. 可視・近赤外ハイブリッド画像処理法による木質廃材のオンライン判別手法の開発

    2009年12月 - 2010年11月

    トステム建材産業振興財団 

      詳細を見る

    資金種別:競争的資金

  5. 分光分析による木材多形質同時評価システムの開発

    2009年11月 - 2010年3月

    企業からの受託研究 

  6. 温度補償型TOF-NIRSによる高精度果実非破壊ハイブリッド計測システムの開

    2009年7月 - 2010年3月

    JST 

      詳細を見る

    資金種別:競争的資金

  7. ケモメトリック分光法による国産材のブランド化

    2008年11月 - 2009年3月

    福澤記念育林基金 

      詳細を見る

    資金種別:競争的資金

  8. 超高速パルスレーザ光による新規果実非破壊計測システムの開発

    2008年7月 - 2009年3月

    独立行政法人 科学技術振興機構 

      詳細を見る

    資金種別:競争的資金

  9. 近赤外分光法による木質系廃材分析システムの開発

    2007年12月 - 2008年3月

    トステム建材産業振興財団 

      詳細を見る

    資金種別:競争的資金

  10. TOF-NIRSによる新しい果実非破壊計測システムの開発

    2007年4月 - 2008年3月

    中部電力基礎技術研究所 

      詳細を見る

    資金種別:競争的資金

  11. TOF-NIRSによる本当においしい有田ミカンのブランド化

    2003年4月 - 2006年3月

    先端技術を活用した農林水産研究高度化事業委託事業 

      詳細を見る

    資金種別:競争的資金

  12. 環境低負荷型木材着色システムの構築

    2001年9月 - 2004年3月

      詳細を見る

    受託研究費

  13. 時間分解近赤外分光法によるリンゴの光計測

    2001年7月

      詳細を見る

    委任経理金

  14. 近赤外分光法による樹種判別の自動化

    2000年5月

      詳細を見る

    委任経理金

  15. 近赤外分光法による果実の非破壊計測

    1998年

    国際共同研究 

  16. 組織構造を保持した生物材料の真実光路長測定

    1997年11月

      詳細を見る

    委任経理金

▼全件表示

科研費 31

  1. コグニティブスペクトロスコピーによる自動樹種判別システムの構築

    研究課題/研究課題番号:19H03015  2019年4月 - 2022年3月

    科学研究費補助金  基盤研究(B)

    土川 覚

      詳細を見る

    担当区分:研究代表者 

    配分額:14820000円 ( 直接経費:11400000円 、 間接経費:3420000円 )

    可視(電子励起)・近赤外(振動励起)スペクトルの形状そのものを情報源として活用し、コグニティブ(認識)スペクトロスコピーとも呼ぶべき新たな分析手法を構築し樹種判別を正確・迅速・簡便に行う。木材の可視・近赤外分光情報を包含したシームレスなハイパースペクトラルデータを利用して、樹種判別を自動で行えるプロトコル構築を目指す。

  2. テラヘルツ時間領域分光法によるエンジニアリングウッドの非破壊総合材質診断

    研究課題/研究課題番号:16H02559  2016年4月 - 2019年3月

    土川 覚

      詳細を見る

    担当区分:研究代表者 

    配分額:30160000円 ( 直接経費:23200000円 、 間接経費:6960000円 )

    木材への透過性に優れ、安全性の高いTHz領域電磁波によるエンジニアリングウッド非破壊評価手法の開発を行った。一連の研究によって、THz時間領域分光法によって合板の密度・含水率・繊維走向を高精度・非破壊で推定できることが示された。また合板に用いられている接着剤の定性も可能であった。さらに、上記性質の画像化および合板の各層の診断可能性も示唆された
    THz時間領域分光法によってエンジニアリングウッドの密度・繊維走向・接着材評価が可能であることが分かった。今後装置の小型化・低価格化が進みエンジニアリングウッド製造工場への導入(製造ラインにおけるエンジニアリングの非破壊・非接触品質評価)ができれば、品質の安心・安全対策、製造プロセスの最適化、製造コストの削減および木質資源の有効利用を達成できる。

  3. 時間・空間分解分光法による吸収・散乱・蛍光特性の把握と木材評価への応用

    研究課題/研究課題番号:16K07805  2016年4月 - 2019年3月

    稲垣 哲也

      詳細を見る

    担当区分:研究分担者 

    近赤外光による木材の品質評価手法に関する研究を行った。これまで木材中での光の散乱については不明な点が多かったが、時間分解分光法・空間分解分光法やシミュレーションを用いることで、木材内部(細胞壁レベル)での光の散乱特性を把握した。また密度や含水率が光の散乱に及ぼす影響を詳細に調べた。これらの情報をもとに、安価・小型な密度計測装置を試作し、十分な精度で密度予測が可能であることを示した。
    これまで近赤外分光法では、複雑な統計処理に依存してブラックボックス的に木材の品質を推定してきたため、得られた結果の分光学的・物理学的解釈が曖昧となりこれが普及・一般化の律速となってきた。本研究成果により、「分光学的・物理学的に曖昧さのない」・安価・小型の木材材質評価装置の開発が可能となった。さらなる研究により、現場での使用が可能な装置開発が可能となる。

  4. ユニークな分光法のカップリングによる脱ケモメトリクス果実評価手法の構築

    2015年4月 - 2017年3月

    科学研究費補助金 

      詳細を見る

    担当区分:研究代表者 

  5. ユニークな分光法のカップリングによる脱ケモメトリクス果実評価手法の構築

    研究課題/研究課題番号:15K14833  2015年4月 - 2017年3月

    土川 覚

      詳細を見る

    担当区分:研究代表者 

    配分額:4030000円 ( 直接経費:3100000円 、 間接経費:930000円 )

    本研究では、ピコ秒オーダの極短時間パルス近赤外光の物質内部での時間変化を解析
    することにより、果実の吸収係数および等価散乱係数を厳密に求め(TOF-NIRS)、さ
    らに果実に照射されたハロゲン光の拡散反射光強度を2本のファイバで検出し(TFDRS)、両者のパラメータから物質内部での光吸収量(化学成分値)を統計解析に頼らずに求めることに成功した。さらに計測した光学定数からモンテカルロシミュレーションを用いて、りんご内部での光挙動のシミュレーションを行った。これにより①蜜部位の面積比率と透過光強度に相関があること、②りんごの散乱係数が大きいことから、透過画像から蜜部位の特定が難しいことが判明した。

  6. ユニークな分光法のカップリングによる脱ケモメトリクス果実評価手法の構築

    2015年4月 - 2017年3月

    日本学術振興会  科学研究費助成事業  萌芽研究

      詳細を見る

    資金種別:競争的資金

  7. NIR-HSI法を活用した木材のハイスループット型材質分析手法の確立

    2013年4月 - 2016年3月

    科学研究費補助金  基盤研究(B)

      詳細を見る

    担当区分:研究代表者 

  8. NIR-HSI法を活用した木材のハイスループット型材質分析手法の確立

    研究課題/研究課題番号:25292102  2013年4月 - 2016年3月

    土川 覚

      詳細を見る

    担当区分:研究代表者 

    配分額:17940000円 ( 直接経費:13800000円 、 間接経費:4140000円 )

    ディジタル画像の各ピクセルに格納された分光スペクトルを多変量解析して所望の物質情報を可視化するハイパースペクトラルイメージング法(HSI法)を近赤外領域で展開し、木材の材質を総合的に判断するこれまでにないハイスループット型非破壊計測手法(NIR-HIS法)の確立を目指した。木材密度、含水率、ヤング係数、あて材およびミクロフィブリル傾角の材内変動の可視化および針葉樹材と広葉樹材の自動判別が可能となった。

  9. 広帯域マルチ分光計測による木材乾燥現象の微視的~巨視的レベルでの把握

    2013年4月 - 2015年3月

    科学研究費補助金 

      詳細を見る

    担当区分:研究代表者 

  10. 広帯域マルチ分光計測による木材乾燥現象の微視的~巨視的レベルでの把握

    研究課題/研究課題番号:25660135  2013年4月 - 2015年3月

    土川 覚

      詳細を見る

    担当区分:研究代表者 

    配分額:4030000円 ( 直接経費:3100000円 、 間接経費:930000円 )

    木材の乾燥下における水分移動の実態を、電子遷移レベル(近近赤外域)、分子振動レベル(近赤外~赤外域)、および分子回転レベル(テラヘルツ域)の広帯域マルチ分光計測で統合的に把握し、乾燥現象を微視的~巨視的オーダで明らかにすることを目的とした。
    含水率を変化させたベイマツ材に近赤外ピコ秒パルス波を照射し、透過した光強度を測定した。ピコ秒オーダでの光強度変化を拡散方程式に当てはめることで、木材の散乱係数および吸収係数を算出した。また、いろいろな含水率の木材の時間領域テラヘルツスペクトルを測定した。有効媒質理論を適応することで、木材の密度および含水率を高い精度で予測できることを示した。また

  11. 年輪年代学の総合的研究-文化財科学における応用的展開をめざして-

    研究課題/研究課題番号:23240116  2011年4月 - 2015年3月

    米延 仁志

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    担当区分:連携研究者 

    本研究では暦年標準パターンネットワークの整備と,それらの文化財科学諸課題への応用を目的とした。その結果,過去約2000年超の長期標準年輪曲線が完備した。標準パターンネットワークを用いた産地同定では,近畿以東の年輪変動パターンが大きく4つに区分できることを見出した。年輪気候学への応用では,東アジア広域的な気候復元が可能となった。新しい技術開発を推進した。コンピュータ断層法などにより木質文化を非破壊で撮像し,年輪年代を決定できた本研究で年輪年代学の総合的研究を推進した結果,歴史・考古学における編年,古環境,保存・劣化等の文化財科学の重要な課題に価値の高い情報を提供できること明らかとなった。

  12. TOF-NIRSによる木質素材の光学特性評価法の確立

    研究課題/研究課題番号:23880027  2011年 - 2012年

    倉田 洋平

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    担当区分:その他 

    ピコ秒オーダーの時間飛行近赤外分光法(TOF-NIRS)によって木材の準微視的領域の材質評価を非破壊で行うことを試み基礎実験を行った。測定で得られる透過光プロフィルから、減光度(参照光と透過光の強度比)と遅れ時間(参照光と透過光のピーク時間の差)を算出し解析に用いた。その結果、木材の密度が増加するにつれ減光度は減少し、また、密度が増加するにつれ遅れ時間は増加する傾向が認められた。

  13. TOF-NIRデンシトメトリによる新奇木材材質計測手法の確立

    2010年4月 - 2013年3月

    科学研究費補助金  基盤研究(A)

    土川 覚

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    担当区分:研究代表者 

  14. TOF-NIRデンシトメトリによる新奇木材材質計測手法の確立

    研究課題/研究課題番号:22248020  2010年 - 2012年

    土川 覚

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    担当区分:研究代表者 

    配分額:26780000円 ( 直接経費:20600000円 、 間接経費:6180000円 )

    本研究では、時間飛行近赤外 (TOF-NIR) デンシトメトリという新奇の分光学的手法を創出し、これに基づいた非破壊木材材質計測手法を確立することを目指した。ピコ秒オーダの極短時間パルスレーザ光を木材に照射し、透過光の時間変動(時間プロフィル)を詳細に観察する計測システムを開発するとともに、透過光変動に及ぼす木材材質の影響を光拡散方程式の順問題および逆問題的解法によって記述し、得られた吸収係数・散乱係数等から各種材質を非破壊で推定することを試みた。また、木材に連続レーザ光(CW光)を照射し透過光量を測定する測定系も別途試作し、両者の測定結果を比較・検討することによって、近赤外レーザによる木材材質測定の可能性を追究した。一連の実験の結果、厚さ 5mm までの木材試料からの透過光の検出が可能となることがわかった。また、いずれの測定方法においても、早材部と晩材部で、密度に対応して透過光量が明瞭に変動した。CW 光の照射スポット分解能に対応して、X 線デンシトメータと同様の密度変化をとらえることができた。また、パルス光測定では、晩材部で透過光度のピーク値の減少およびピーク時間の遅れが確認できた。TOF-NIR 法を用いて、木材の乾燥経過モニタリングを試みた。各乾燥段階によって、吸収・散乱係数は特徴的に変化し、これらは試料表層部および内部における水分の存在状況と密接に関わっていることが明らかになった。上記の結果に基づいて、透過光時間プロフィルを説明変数とする多変量解析を行い、含水率の推定を行った結果、従来の近赤外反射スペクトルを説明変数にした場合よりも高精度で含水率が予測できることが明らかになった。

  15. TOF-FTハイブリッドNIRシステムによる木質材料の総合非破壊診断

    2007年7月 - 2010年3月

    科学研究費補助金  基盤研究(B)

    土川 覚

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    担当区分:研究代表者 

  16. ホリスティックな材質測定によるブラジル熱帯林の戦略的持続経営

    2007年7月 - 2010年3月

    科学研究費補助金  基盤研究(B)

    土川 覚

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    担当区分:研究代表者 

  17. TOF-FTハイブリッドNIRシステムによる木質材料の総合非破壊診断

    研究課題/研究課題番号:19380099  2007年 - 2009年

    土川 覚

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    担当区分:研究代表者 

    配分額:15600000円 ( 直接経費:12000000円 、 間接経費:3600000円 )

    木質材料の強度・含有水分状況・節の有無に関する非破壊診断を、近赤外分光方式に基づく2つの測定系(時間飛行タイプならびに広域非接触型フーリエ変換タイプ)をハイブリッド化したシステムによってオンラインレベルで実施し、製材工場等の木材1次加工現場への導入可能性を検討した。近赤外スペクトルにより複数の評価項目を一度に評価でき、生産性の高い木材の光学式品質評価方法を提供するための基盤を確立することができた。

  18. ホリスティックな材質測定によるブラジル熱帯林の戦略的持続経営

    研究課題/研究課題番号:19405029  2007年 - 2009年

    土川 覚

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    担当区分:研究代表者 

    配分額:16770000円 ( 直接経費:12900000円 、 間接経費:3870000円 )

    本研究は、ブラジル熱帯材を対象として、具体的かつ有効な「品質証明」手法を提示することを目的として計画されたものである。綿密な現地調査および可搬型装置による立木・丸太の近赤外反射スペクトル・成長応力・応力波測定を行い、これらから密度・ミクロフィブリル傾角(MFA)・繊維長・強度等を推定した。木材製品の価値を伝えて売買することによる熱帯林の戦略的な持続経営が上記手順によって可能となることが示された。

  19. 人に優しいバイオマス -最先端木材研究への招待-

    2006年5月 - 2006年10月

    科学研究費補助金  ひらめき☆ときめき サイエンス

    土川 覚

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    担当区分:研究代表者 

  20. ケモメトリカルNIRイメージング法による木質系廃材分析システムの構築

    研究課題/研究課題番号:16580131  2004年 - 2006年

    土川 覚

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    担当区分:研究代表者 

    配分額:3800000円 ( 直接経費:3800000円 )

    木材を建築・工業材料として利用する際には、防腐・難燃等の処理、接着・塗装剤の使用、あるいは塩化ビニルシートなどを複合させることが一般的に行われる。したがって、廃棄・リサイクルの過程においても化学物質の種類・含有量などを正確・迅速・簡便に把握して、可燃・不燃の見極めや最適な利用法を考えることがたいせつとなる。本研究では、近赤外光照射によって得られる試料画像にケモメトリックス的な処理を施すことによって、目的物質の定量・定性分析を測定面全域にわたって行おうとするケモメトリカルNIRイメージング法によって、新たな木質系廃材分析システムを構築することを目指した。
    まず、近赤外カメラシステムと画像解析ソフトウエアを組み合わせて、画像データの取り込みおよびその解析に関する予備実験を行い、装置系の構成等を検討した。続いて、いろいろな木質試料ならびに各種化学製品の近赤外吸収スペクトルを近赤外分光光度計によって測定し、それぞれの物質固有のスペクトルを確認した。
    分光光度計に組み込まれた判別分析ソフトウエアによって、素材、防腐処理材およびオーバーレイ木質材料の判別に適した波長を求め、1100nm,1430nmおよび1700nmの干渉フィルタを依頼作成した。
    上記フィルタを近赤外カメラシステムに装着して各試料を測定し、画像解析ソフトウエアを用いて輝度分布のヒストグラムを求めた。これをある種のスペクトル情報とみなして、多変量解析の一種であるSIMCA解析を行ったところ、正答率90%で上記3種類の木質材料を判別することが可能となった。

  21. 俳画と公文書に用いられた近世和紙の材質・抄紙技法の非破壊分析とその保存法の検討

    研究課題/研究課題番号:16018214  2004年 - 2005年

    米延 仁志

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    担当区分:研究分担者 

    本研究では江戸時代に阿波藩(徳島県)で製造され、俳画や公文書に用いられた和紙製品を対象に、近赤外分光法を用いて、古文書和紙材質の非破壊計測を行った。また奈良時代から現代の和紙試料を用いて重水素置換法による、経年劣化に関与する和紙の超微細構造の分析を行った。主な成果は以下のとおり。近赤外分光法を用いることで、木質文化財の材質を非破壊・短時間で計測できる。これは、貴重な文化財の保存と修復のための基礎データとなる材質情報を迅速・簡便に分析できる点が意義深い。同様な手法は、皮革・繊維製品などの、特に生物材料を素材とする文化財にも容易に転用が可能であり、これまで個々に計測されてきた文化財の材質計測に統一的な分析法の提供を可能とするものである。本研究を通して、木質材料での近赤外光の吸収特性が明らかとなった。従来、分光分析では一般に得られるスペクトル情報から具体的な構成成分への帰属が困難であったが、本研究の結果、木質文化財の材質を発現する構成成分の物理的・化学的変化を近赤外分光法を用いることで容易に計測することができる。重水素置換法を援用することで、これまでに無い超微細構造での木質文化財の劣化機構を明らかにできた。

  22. ウォッシュボード防止帯のこの開発

    2000年7月 - 2001年1月

    科学研究費補助金  基盤研究(B)(2)(展開)

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    担当区分:研究分担者 

    科研費

  23. 円周状溝形成による丸のこの熱的安定化

    2000年7月 - 2001年1月

    科学研究費補助金  基盤研究(C)(2)(一般)

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    担当区分:研究分担者 

    科研費

  24. 圧縮・回復法を用いたしまりばめ仕口

    2000年7月 - 2001年1月

    科学研究費補助金  基盤研究(B)(2)(一般)

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    担当区分:研究分担者 

    科研費

  25. ウォッシュボード防止帯のこの開発

    研究課題/研究課題番号:12556026  2000年 - 2001年

    木村 志郎

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    担当区分:研究分担者 

    帯のこ挽材において、のこ歯通過周波数が帯のこ固有振動数より数Hz高い運転条件のとき、のこ歯の切削軌跡にずれによる切削抵抗横分力が自発的に起こる。帯のこは自励振動(再生びびり)が誘起され、挽材面に凹凸状のウォッシュボードが形成され、問題となっている。自励振動は周期現象であるため、その原因周波数となるのこ歯が等間隔に配列されていると、自励振動は、効率高く発生する。
    そこで、本研究では、のこ歯を不等間隔にすることによりウォッシュボードを防止することを発案した。のこ歯ピッチ17,18,19,20,21mm(最小-最大差4mm)および15,16,17,18,19,20,21,22,23,24mm(最小-最大差9mm)を乱数表によりランダムに配列したランダム帯のこ1およびランダム帯のこ2を試作した。のこ車直径410mmの木工用帯のこ盤を用いて、のこ車回転数150〜350rpmの範囲で挽材実験を行い、帯のこの変位および挽材面性状の観察から、自励振動の有無を調べた。等間隔帯のこは曲げ振動モード、ねじり振動モードともに自励振動が起こるのに対して、ランダム帯のこ1は曲げ振動モードの振動は抑制され、ランダム帯のこ2は曲げ振動モード、ねじり振動モードともに完全に振動が抑制され、ウォッシュボード発生は完全に防止できた。自励振動の抑制効果を数値的評価を試みた。のこ歯の振動1周期間で、横分力と振動方向が同方向は正(振動成長)、逆方向は負(振動消滅)とし、全のこ歯で総和を指標値とした。ランダム帯のこ2はどの振動モードも指標値は負になり、自励振動抑制ランダムピッチ帯のこであった。

  26. 円周状溝成形による丸のこの熱的安定化

    研究課題/研究課題番号:12660149  2000年 - 2001年

    横地 秀行

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    担当区分:研究分担者 

    残留内部応力を有する天然生物材料である木材を丸のこで縦挽きする際に、残留内部応力が解放され、鋸断直後フリーとなった部位がのこ歯でない台金面に強く接触することがある。摩擦熱により台金の不均一温度分布に基づく圧縮熱応力が生まれ、丸のこの剛生が低下し切削不能になることがある。極端な場合、丸のこ座屈、破損、労働災害を招く。
    そこで、本研究では、挽材中に木材が台金に接触しても摩擦熱が生まれない新しい丸のこをデザインした。台金面に円周状に複数の溝を形成させた丸のこを試作した。溝形状は頂角90°の3角形断面として、溝深さ0〜1mmと変化させることにより、接触幅を2〜0.2mmとした。溝深さ0mm、接触幅2mmは溝なしの通常の丸のこである。熱的安定性はモデル的に調べた。溝成形台金丸のこを3000rpmで回転させた。2分力ロードセルを介して50×50mm断面のプナ木口面を丸のこ半径100mmから150mmの位置に10Nの荷重で押付けた。摩擦力、サーモグラフィによる丸のこ半径方向温度分布および非接触変位計、FFTスペクトルアナライザによる固有振動数変化を調べた。結果、溝のない通常丸のこに比べ、溝成形台金丸のこは半分以下の温度上昇に抑えられた。溝深さを大きいほど、木材と丸のこ面の接触面積が小さく、摩擦熱抑制効果は高く、熱的に安定であった。反面、剛生を決定する台金の厚みが小さくなり、固有振動数は低下してしまった。摩擦熱抑制効果と固有振動数変化より、溝深さ0.6〜0.8mm、接触幅0.6〜0.4mmが適正溝条件と考えられた。

  27. 圧縮・回復法を用いたしまりばめ仕口

    研究課題/研究課題番号:11460078  1999年 - 2000年

    木村 志郎

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    担当区分:研究分担者 

    木材の弾塑性的性質、形状記憶性を生かし、ほぞの圧縮セット、回復性を用いたしまりばめ仕口について検討した。圧縮セットほぞをほぞ穴に挿入し、熱、水分により圧縮セットを回復した直後の高含水率状態のしまりばめ仕口は、圧縮変形の回復力と細胞の膨潤力によって、非常に強固で高い引抜き強度3kNを示した。しかし、しまりばめ仕口が乾燥し気乾状態になると、回復力が消滅し、細胞が収縮し、完全なすきまばめ状態になり、試みは失敗となった。
    そこで、圧縮・回復法の利点を生かし、深さ方向に大きさが変化する形状制御型の変則しまりばめ仕口に研究対象を変更した。深さ方向に傾斜をもたせた蟻形ほぞと段差のあるT型ほぞのしまりばめ仕口を作成し、引抜き強度を調べた。ここでは、仕口接合時に圧縮セットを熱、水分による回復操作を施してから、完全に乾燥し、気乾状態にさせた。その結果、ほぞ深さ50mm、ほぞ短辺30mm、長辺80mm程度の寸法の変則しまりばめ仕口で、T型ほぞでは引抜き強度5kN、ほぞ深さ方向に傾斜角7°の蟻形ほぞで引抜き強度2kNの結果を得た。これらの引抜き強度値はある程度高いものと思われ、この変則しまりばめ方法の可能性が伺えた。

  28. 高出力近赤外レーザ光を用いた非破壊計測による木材内部の物理的・化学的構成の把握

    1996年7月 - 1997年1月

    科学研究費補助金  奨励研究(A)

      詳細を見る

    担当区分:研究代表者 

    科研費

  29. 高出力近赤外レーザー光を用いた非破壊計測による木材内部の物理的・化学的構造の把握

    研究課題/研究課題番号:08760162  1996年

    奨励研究(A)

    土川 覚

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    担当区分:研究代表者 

    配分額:1000000円 ( 直接経費:1000000円 )

    本研究では、木材の非破壊計測用のプローブとして、近赤外レーザ光を実際面で活用できるようにするために、水の吸収波長(970nm)に近接した980nmおよび水の吸収とは直接関係しない830nmの発信波長をもつ高出力近赤外レーザ光コリメータユニットを構成し、材内のさまざまな情報を定量的に把握して、この方式の基礎資料を充足した。得られた結果を列挙する。
    1.繊維飽和点以下で調湿されたいろいろな厚さの試料を対象として上記の実験を行った。その結果、水が木部実質に吸着すると細胞内こう表面での光の反射・散乱が抑制される事実が確認された。この現象と水に対する光の吸収特性を考慮することにより、試料厚さおよび照射波長によって特徴的に変動する透過光出力の動向をはじめて正しく理解することができる。
    2.上記2波長(830nm、および980nm)の透過光出力実測値を説明変量として重回帰分析を行った結果、いずれの試料厚さにおいても予測精度の高い含水率検量線を作成することができた。
    3.飽水状態の試料を室内に自然放置し、所定の時間間隔で透過光出力を測定した。細胞内こう部に自由水が存在すると、照射波長の水に対する吸収特性に関係なく、細胞内こう表面での光の反射・散乱が極端に抑制されることを見いだした。
    4.透過光の検出位置をいろいろ変更して計測した結果、近赤外レーザ光は細胞内こうの長軸方向に伝播する傾向が強いことを確認した。
    5.割れおよびヤニすじをもつモデル試料を測定し、これを検出できる条件について検討した。

  30. 近赤外分光法による木材の繊維走行ならびに含水率のインプロセス計測

    1995年7月 - 1996年1月

    科学研究費補助金  基盤研究(B)(1)(一般)

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    担当区分:研究分担者 

    科研費

  31. 近赤外分光法による木材の繊維走行ならびに含水率のインプロセス計測

    研究課題/研究課題番号:06454093  1994年 - 1995年

    一般研究(B)

    堤 成晃

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    担当区分:研究分担者 

    本研究は、木材の機械加工システムにおいてその加工条件を刻々管制しようとする場合にとくに重要な情報とみなされている含水率と繊維走行を対象とし、これらを迅速に精度良く検出する方法として近赤外分光法に着目して、系統的な実験と解析によって本法実施のための基礎資料を充足しようとするものである。
    1.近赤外レーザ光発振装置ならびにセンサを用いて、次の条件下での木材試料の計測を行い、諸検討を加えた。
    (1)含水率を系統的に変更して透過光を計測し、含水率が高いほど透過光出力が大きいことを見いだした。単純に考えれば現象は逆に現れるようにも予想されるが、本研究における検討の結果、これは自由水が多く保有されるほど細胞内腔表面の光の反射率が低下して透過光が大きくなるためであることが明らかにされた。これによって、内部の含水率を近赤外レーザ光によって高い精度で計測する途が拓らかれた。
    (2)近赤外光照射面に対する繊維走行を系統的に変更して透過光を計測し、繊維の試料表面に対するもぐり角によって透過光出力が変化するようすを確認した。また、同一試料に対して試料表面へのレーザ光の入射角を変化させた場合に、もぐり角に応じた特徴的な変化モードが現れることも見いだした。
    (3)試料の厚さを変更した実験を行い、いろいろな含水率や繊維走行に関する計測可能深さを確認した。これによって、さらに高出力のレーザ光を光源とする装置の設計に関する資料を得た。
    2.計測データの計算機処理に関する検討を行い、説明変量として選択した波長の適否を計測精度の観点から判定するための基準を明らかにするとともに、説明変量が吸収スペクトルの2次微分値の場合にもっとも予測精度が高くなることなどを明らかにした。

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産業財産権 7

  1. 木質材料の分類方法および判定方法

    土川 覚、小堀 光、比嘉さくら

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    出願番号:特願2012-2111157  出願日:2012年9月

    特許番号/登録番号:5945202  登録日:2016年6月 

    出願国:国内  

  2. Method of classifying and discerning wooden materials

    Satoru Tsuchikawa, Hikaru Kobori, Sakura Higa

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    出願番号:US 14/367,199  出願日:2012年9月

    特許番号/登録番号:US9164029 B2  登録日:2015年10月 

    出願国:外国  

  3. Method of classifying and discerning wooden materials

    Satoru Tsuchikawa, Hikaru Kobori, Sakura Higa

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    出願番号:US 14/367,199  出願日:2012年9月

    特許番号/登録番号:ZL2013800038873  登録日:2017年5月 

    出願国:外国  

  4. Method of classifying and discerning wooden materials

    Satoru Tsuchikawa, Hikaru Kobori, Sakura Higa

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    出願番号:US 14/367,199  出願日:2012年9月

    特許番号/登録番号:ZL2013800038873  発行日:2017年5月

  5. 木材の光学式品質評価方法

    土川 覚、倉田洋平、藤本高明、井本希孝

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    出願人:国立大学法人名古屋大学、藤本高明、飯田工業株式会社

    出願番号:特願2009-161224  出願日:2009年7月

    出願国:国内  

  6. 溶媒を用いた木材の流動成形

    杉元宏行、三木恒久、金山公三、横地秀行、土川 覚、山下 修

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    出願人:独立行政法人産業技術総合研究所、横地秀行、土川 覚

    出願番号:特願2008-335353  出願日:2008年12月

    出願国:国内  

  7. 光学方式特性判別方法、及びその装置

    土川 覚、小堀 光、米延仁志、野間順一

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    出願人:国立大学法人名古屋大学、国立大学法人鳴門教育大学、名古屋港筏株式会社

    出願番号:特願2006-106972  出願日:2006年4月

    公開番号:特開2007-278908 

    出願国:国内  

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担当経験のある科目 (本学) 5

  1. 生物情報計測学

    2020

  2. 修士論文研究4

    2020

  3. 物理学基礎Ⅰ

    2009

  4. 生物材料機能学

    2009

  5. 生物情報計測学

    2009

担当経験のある科目 (本学以外) 5

  1. 森林科学特別講義(Ⅰ)

    2011年4月 - 2012年3月 京都大学)

  2. 物理学基礎

    2010年4月 - 2011年3月 中部大学)

  3. 2009年4月 - 2010年3月 Shizuoka University)

  4. 2007年4月 - 2008年3月 Tokyo University of Agriculture and Technology)

  5. 2006年4月 - 2007年3月 Tokyo University of Agriculture and Technology)

 

社会貢献活動 8

  1. さくらサイエンスプラン

    役割:企画

    2020年1月 - 2020年2月

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    対象: 大学生, 大学院生, 研究者

    種別:その他

  2. さくらサイエンスプラン

    役割:企画

    2019年1月 - 2019年2月

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    対象: 大学生, 大学院生, 研究者

    種別:その他

  3. さくらサイエンスプラン

    役割:企画

    2017年11月

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    対象: 大学生, 大学院生, 研究者

    種別:その他

  4. さくらサイエンスプラン

    役割:企画

    2016年12月

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    対象: 大学生, 大学院生, 研究者

    種別:その他

  5. さくらサイエンスプラン

    2015年11月

  6. さくらサイエンスプラン

    2014年11月

  7. JST サマーサイエンスキャンプ

    2014年8月

  8. JST サマーサイエンスキャンプ

    2013年8月

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