研究者詳細 - 土川　覚

論文 - 土川　覚

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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 ( 1 ) 頁： 92 - 99 2010年1月

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

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

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

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

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

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

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

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

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

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

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

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

Web of Science

Scopus

PubMed

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

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

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

Web of Science

Scopus

Identification of dead and sound knots by near infrared spectroscopy

Fujimoto, T, Tsuchikawa, S

Journal of Near Infrared Spectroscopy 18 巻 2010年

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

藤本高明, 土川覚

Applied Spectroscopy 64 頁： 92 - 99 2010年

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

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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Scopus

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

記述言語：英語掲載種別：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

Web of Science

Scopus

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

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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