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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

リグナ・ハノーバー2011名古屋大学ブース出展報告査読有り

土川覚

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

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

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

Web of Science

Scopus

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

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

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

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

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

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

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

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

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

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

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

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

Web of Science

Scopus

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

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

近赤外分光法による木質材料の非破壊計測 : 現状と展望査読有り

土川覚

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

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

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

Web of Science

Scopus

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

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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