Faculty Profiles - TSUCHIKAWA, Satoru

Papers - TSUCHIKAWA, Satoru

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

Takaaki Fujimoto, Yohei Kurata, Kazushige Matsumoto, Satoru Tsuchikawa

APPLIED SPECTROSCOPY Vol. 64 ( 1 ) page： 92 - 99 2010.1

Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：SOC APPLIED SPECTROSCOPY

Near-infrared (NIR) spectroscopy, coupled with multivariate analysis, has been used to evaluate the wood properties of sawn lumber of Japanese larch (Larix kaempferi), whose diffuse reflection spectra were acquired under static and moving conditions. Prediction models of the dynamic modulus of elasticity (E(fr)), the modulus of elasticity in bending tests (E(b)), the bending strength (F(b)), the wood density (DEN), and the moisture content (MC) were developed using partial least squares (PLS) analysis. For all wood properties, models obtained from data collected under the moving condition as an analogue of on-line measurement were superior to those from the static condition data. The regression coefficients for the PLS models predicting the mechanical properties in both static and moving conditions showed clear peaks at the absorption bands due to the three major polymers of wood, i.e., cellulose, hemicellulose, and lignin. NIR spectroscopy has high potential for the on-line grading of sawn lumber.

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

Fujimoto T, Kurata Y, Matsumoto K, Tsuchikawa S

Applied spectroscopy Vol. 64 ( 1 ) page： 92 - 9 2010.1

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

Fujimoto Takaaki, Kurata Yohei, Matsumoto Kazushige, Tsuchikawa Satoru

APPLIED SPECTROSCOPY Vol. 64 ( 1 ) page： 92 - 99 2010.1

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

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

Applied Spectroscopy Vol. 64 2010

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

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

Forest Products Journal Vol. 60 ( 3 ) page： 244-248 2010

Identification of dead and sound knots by near infrared spectroscopy Invited Reviewed

Fujimoto, T.; Tsuchikawa, S.

Journal of Near Infrared Spectroscopy Vol. 18 2010

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

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

Biomacromolecules Vol. 11 page： 2300-2306 2010

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

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

Journal of Wood Science Vol. 56 2010

Near Infrared Spectroscopic Assessment of Contamination Level of Sewage Reviewed

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

Water Science and Technology Vol. 61 ( 8 ) page： 1957-1963 2010

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 Vol. 11 page： 2300-2306 2010

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 Vol. 56 2010

Near-infrared spectroscopic assessment of contamination level of sewage Reviewed

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

WATER SCIENCE AND TECHNOLOGY Vol. 61 ( 8 ) page： 1957 - 1963 2010

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

Near Infrared Spectroscopic Assessment of Contamination Level of Sewage

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

Water Science and Technology Vol. 61 ( 8 ) page： 1957-1963 2010

Identification of dead and sound knots by near infrared spectroscopy Reviewed

Fujimoto Takaaki, Tsuchikawa Satoru

JOURNAL OF NEAR INFRARED SPECTROSCOPY Vol. 18 ( 6 ) page： 473 - 479 2010

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

Identification of dead and sound knots by near infrared spectroscopy

Fujimoto, T, Tsuchikawa, S

Journal of Near Infrared Spectroscopy Vol. 18 2010

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

藤本高明, 土川覚

Applied Spectroscopy 64 page： 92 - 99 2010

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

Yonenobu Hitoshi, Tsuchikawa Satoru, Sato Karina

VIBRATIONAL SPECTROSCOPY Vol. 51 ( 1 ) page： 100 - 104 2009.9

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：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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Influence of pith location on warp of lumber in sawing medium-quality sugi (Cryptomeria japonica D. Don) logs Reviewed

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

EUROPEAN JOURNAL OF WOOD AND WOOD PRODUCTS Vol. 67 ( 3 ) page： 271 - 276 2009.8

Language：English Publishing type：Research paper (scientific journal) Publisher：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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Scopus

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

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

Applied Spectroscopy Vol. 63 ( 7 ) page： 753-758 2009.7

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

Tetsuya Inagaki, Katsuya Mitsui, Satoru Tsuchikawa

APPLIED SPECTROSCOPY Vol. 63 ( 7 ) page： 753 - 758 2009.7

Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：SOC 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 leech 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.

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