研究者詳細 - 土川　覚

論文 - 土川　覚

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*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

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

記述言語：英語掲載種別：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

Web of Science

Scopus

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 ( 6 ) 頁： 529 - 537 2008年

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

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

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

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

Web of Science

Scopus

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

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

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

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

Scopus

PubMed

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

第2回近赤外分光部会シンポジウム査読有り

土川覚

分光研究 = Journal of the spectroscopical research of Japan 56 巻 ( 2 ) 頁： 86 2007年4月

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

第2回近赤外分光部会シンポジウム査読有り

土川覚

分光研究 = Journal of the spectroscopical research of Japan 56 巻 ( 2 ) 頁： 86 2007年4月

第2回近赤外分光部会シンポジウム査読有り

土川覚

分光研究 = Journal of the spectroscopical research of Japan 56 巻 ( 2 ) 頁： 86 2007年4月

*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

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

Tsuchikawa, S

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

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

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

Web of Science

Scopus

Instrumentation: Instruments

Mcclure W.

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

Instrumentation: Time-of-Flight Spectroscopy

Tsuchikawa S.

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

Sampling Techniques 査読有り

Tsuchikawa S

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

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