Faculty Profiles - TSUCHIKAWA, Satoru

Papers - TSUCHIKAWA, Satoru

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Near-Infrared Spectroscopic Study of the Physical and Mechanical Properties of Wood with Meso-and Micro-Scate Anatomical Observation. Reviewed

土川覚

Applied Spectroscopy 59・1 page： 86 - 93 2005

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

土川覚

The Analyst 130 page： 379 - 384 2005

Near-Infrared Spectroscopic Study of the Physical and Mechanical Propertics of Wood with Meso- and Micro-Scale Anatomical Observation Reviewed

土川覚

Applied Spectroscopy 59・1 page： 86 - 93 2005

Near-Infrared Spectroscopic Study of the Physical and Mechanical Properties of Wood with Meso-and Micro-Scale Anatomical Observation Reviewed

土川覚

Applied Spectroscopy 59・1 page： 86 - 93 2005

Spectroscopic monitoring of wood characteristics variation by light-irradiation Reviewed

Tsuchikawa, S; Inoue, K; Mitsui, K

FOREST PRODUCTS JOURNAL Vol. 54 ( 11 ) page： 71 - 76 2004.11

Spectroscopic monitoring of wood characteristics variation by light-irradiation Reviewed

Tsuchikawa S., Inoue K., Mitsui K.

Forest Products Journal Vol. 54 ( 11 ) page： 71 - 76 2004.11

Language：English Publishing type：Research paper (scientific journal) Publisher：Forest Products Journal

This study deals with the feasibility of near-infrared (NIR) spectroscopy to qualitatively monitor the variation in wood characteristics caused by ultraviolet light-irradiation. It was found from the second derivative NIR spectra that OH groups in the amorphous regions in cellulose, hemicellulose, and lignin could be easily decomposed into low molecular matter by light-irradiation. The degradation rates for the amorphous regions in cellulose and hemicellulose were faster than that for lignin. Such degradation of main chemical compounds in wood by light-irradiation was closely associated with yellowing of the samples. The ratio of the second derivative of absorbance (Rλ) at λ nm after light-irradiation to before irradiation, was investigated. In the case of OH groups in the amorphous region, we could not find an obvious difference in the trend of Rλ, between wood species. However, it was suggested from Rλ that the decomposition state of lignin by light-irradiation varied characteristically with wood species. Furthermore, we found a strong correlation between Rλ due to lignin and chroma coordinates (i.e.; δb*), independent of wood species. In the case of hemicellulose, there were considerable differences in Rλ vs. δb* between softwoods and hardwoods.

Scopus

Wood photography using light irradiation and heat treatment Reviewed

K Mitsui, A Murata, S Tsuchikawa, M Kohara

COLOR RESEARCH AND APPLICATION Vol. 29 ( 4 ) page： 312 - 316 2004.8

Language：English Publishing type：Research paper (scientific journal) Publisher：JOHN WILEY & SONS INC

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. DeltaE* 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 Deltab*. 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 DeltaE* after thermal treatment was about 22. Humans can distinguish four to seven colors that can be created by this method. (C) 2004 Wiley Periodicals, Inc.

DOI： 10.1002/col.20027

Web of Science

Scopus

Application of time-of-flight near infrared spectroscopy for detecting sugar and acid contents in apples Reviewed

Tsuchikawa S, Hamada T

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY Vol. 52 ( 9 ) page： 2434 - 2439 2004.5

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：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

Web of Science

Scopus

PubMed

New dating technique for wood-based cultural properties using near infrared spectroscopy(Proceedings of the 16^<th> Symposium on Researches Using the Tandetron AMS System at Nagoya University in 2003)

Yonenobu Hitoshi, Tsuchikawa Satoru, Oda Hirotaka, Siesler Heinz W.

Summaries of Researches using AMS at Nagoya University ( 15 ) page： 74 - 82 2004.3

Publisher：Nagoya University

Non-destructive measurement of properties were investigated for wood-based cultural properties using near infrared spectroscopy (NIRS). Antique samples of washi paper scrolls and a pillar member of old wooden building were used for the analysis of temporal degradation. The results obtained show good agreement with the conventional, destructive analysis. In consequence, it is concluded that NIRS shows good potential as a non-destructive dignostic tool for wood-based cultural properties. New non-destructive dating technique was developed using dendrochronologically dated wood samples. NIR absorbance peaks for main wood components show highly linear correlation with tree-ring dates. Partial least regression was performed to calibrate NIR absorbance to age. The NIR dating method shows good performance in accuracy which is almost close to those in tree-ring dating and is higher than those in AMS radiocarbon dating.

DOI： 10.18999/sumrua.15.74

Spectroscopic Monitoring of Wood Characteristics Variation by Light-Irradiation Reviewed

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

Forest Products Journal Vol. 54 page： 71-76 2004.1

Spectroscopic Monitoring of Wood Characteristics Variation by Light-Irradiation Reviewed

Tsuchikawa, S, Inoue, K, Mitsui K

Forest Products Journal Vol. 54 page： 71-76 2004.1

Wood Photography Using Light-Irradiation and Heat Treatment Reviewed

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

Color Research and Application Vol. 29 ( 4 ) page： 312-315 2004

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

Tsuchikawa, S.; Hamada, T.

Journal of Agricultural and Food Chemistry Vol. 52 ( 9 ) page： 2434-2439 2004

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

Tsuchikawa, S

MOKUZAI GAKKAISHI Vol. 50 ( 3 ) page： A10 - A12 2004

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 Vol. 52 ( 9 ) page： 2434-2439 2004

Damage cumulation on wood by composition of several loading factors

KOHARA Mitsuhiro, MITSUI Katsuya, MURATA Akihiro, TSUCHIKAWA Satoru

Science report of the Faculty of Education, Gifu University. Natural science Vol. 28 ( 2 ) page： 129 - 131 2004

Damage cumulation on wood by composition of several loading factors Reviewed

KOHARA Mitsuhiro, MITSUI Katsuya, MURATA Akihiro, TSUCHIKAWA Satoru

Science report of the Faculty of Education, Gifu University. Natural science Vol. 28 ( 2 ) page： 129 - 131 2004

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

Tsuchikawa, S.

MOKUZAI GAKKAISHI Vol. 50 ( 3 ) page： A10 - A12 2004

Damage cumulation on wood by composition of several loading factors Reviewed

KOHARA Mitsuhiro, MITSUI Katsuya, MURATA Akihiro, TSUCHIKAWA Satoru

Science report of the Faculty of Education, Gifu University. Natural science Vol. 28 ( 2 ) page： 129 - 131 2004

近赤外分光法による新しい考古計測学の確立 Reviewed

米延仁志, 土川覚

第20回記念非破壊分析シンポジウム講演要旨集 20 page： 91 - 97 2004

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Papers - TSUCHIKAWA, Satoru