Faculty Profiles - TSUCHIKAWA, Satoru

Papers - TSUCHIKAWA, Satoru

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Spectroscopic monitoring of biomass modification by light-irradiation and heat treatment Reviewed

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

Journal of Near Infrared Spectroscopy Vol. 11 ( 5 ) page： 401 - 405 2003

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of Near Infrared Spectroscopy

This study discusses the use of near infrared spectroscopy for monitoring of the process by which biomass is modified by light-irradiation and heat treatment. As a change in the colour of wood is closely related to the change in its physicochemical structure, we investigated the relationship between the tristimulus values and the diffusely-reflected near infrared spectra of wood samples during a constrained modification process. Such basic research is required to develop a new method of colouring wood without paint. The change in colour with heat treatment was much greater in light-irradiated wood than in non-irradiated wood. The change in the colour of wood by light-irradiation and heat treatment is related to the degradation of lignin and hemicellulose, which was evident from the variation of absorption bands at 1672 nm for CH in aromatic skeletal and 1724 nm for CH in furanose or pyranose. NIR spectroscopy will become a useful method for the detection of a change in chemical structure of wood caused by light-irradiated and heat treatment.

DOI： 10.1255/jnirs.391

Scopus

Spectroscopic monitoring of biomass modification by light-irradiation and heat treatment Reviewed

Tsuchikawa S, Murata A, Kohara M, Mitsui K

JOURNAL OF NEAR INFRARED SPECTROSCOPY Vol. 11 ( 5 ) page： 401 - 405 2003

Non-destructive near infrared spectroscopic measurement of antique washi calligraphic scrolls Reviewed

Yonenobu H., Tsuchikawa S., Oda H.

Journal of Near Infrared Spectroscopy Vol. 11 ( 5 ) page： 407 - 411 2003

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of Near Infrared Spectroscopy

Degradation of antique washi paper was examined by non-destructive near infrared spectroscopy. Difference second derivative spectra of the modern minus antique samples were analysed for the absorption peaks due to the main chemical components of washi paper, i.e. cellulose and hemicellulose. The absorption peaks were decreased for amorphous and semi-crystalline regions of cellulose and for hemicellulose, showing the results consistent with conventional, destructive sugar analysis. It is concluded that near infrared spectroscopy is a useful technique for the non-destructive monitoring of the degradation of the chemical properties of washi paper.

DOI： 10.1255/jnirs.392

Scopus

Discriminant analysis of wood-based materials with weathering damage by near infrared spectroscopy Reviewed

Tsuchikawa S., Yamato K.

Journal of Near Infrared Spectroscopy Vol. 11 ( 5 ) page： 391 - 399 2003

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of Near Infrared Spectroscopy

This research was aimed at finding a suitable discriminate technique for wood-based materials which had suffered from weathering damage, as an analogue of waste wood condition, by means of near infrared (NIR) spectroscopy and several kinds of chemometrics. The feasibility of Mahalanobis generalised distance, K nearest neighbours (KNN) or soft independent modelling of class analogy (SIMCA) as the classification method of wooden materials was examined in detail. The differences in the accuracy of classification with the spectrophotometer (for example, laboratory use and field use), pre-treatment of NIR spectra or the wavelength range as the explanatory variables were also taken into account. Five categories of wood-based materials (solid wood, laminated wood, particle or fibreboard, impregnated wood and overlaid wood) were exposed to outdoor sunlight for up to six months. It was difficult to apply Mahalanobis generalised distance to the classification of five material types where the NIR spectra varied greatly with the sample categories. Both of KNN and SIMCA presented the highest correct classification of over 93%, independent of the spectrophotometer. These results support the applicability of NIR spectroscopy to the classification of waste wood at the actual factory and job site.

DOI： 10.1255/jnirs.390

Scopus

Non-destructive near infrared spectroscopic measurement of antique washi calligraphic scrolls Reviewed

H Yonenobu, S Tsuchikawa, H Oda

JOURNAL OF NEAR INFRARED SPECTROSCOPY Vol. 11 ( 5 ) page： 407 - 411 2003

Language：English Publishing type：Research paper (scientific journal) Publisher：N I R PUBLICATIONS

Web of Science

Spectroscopic monitoring of biomass modification by light-irradiation and heat treatment Reviewed

S Tsuchikawa, A Murata, M Kohara, K Mitsui

JOURNAL OF NEAR INFRARED SPECTROSCOPY Vol. 11 ( 5 ) page： 401 - 405 2003

Authorship：Lead author,　Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：N I R PUBLICATIONS

This study discusses the use of near infrared spectroscopy for monitoring of the process by which biomass is modified by light-irradiation and heat treatment. As a change in the colour of wood is closely related to the change in its physicochemical structure, we investigated the relationship between the tristimulus values and the diffusely-reflected near infrared spectra of wood samples during a constrained modification process. Such basic research is required to develop a new method of colouring wood without paint. The change in colour with heat treatment was much greater in light-irradiated wood than in non-irradiated wood. The change in the colour of wood by light-irradiation and heat treatment is related to the degradation of lignin and hemicellulose, which was evident from the variation of absorption bands at 1672 nm for CH in aromatic skeletal and 1724 urn for CH in furanose or pyranose. NIR spectroscopy will become a useful method for the detection of a change in chemical structure of wood caused by light-irradiated and heat treatment.

Web of Science

Evaluation of Elastic Modulus of Wood Surface Using Small Specimen Reviewed

KOHARA Mitsuhiro, MITSUI Katsuya, MURATA Akihiro, TSUCHIKAWA Satoru

Science report of the Faculty of Education, Gifu University. Natural science Vol. 28 ( 1 ) page： 61 - 63 2003

Copying Photographic Images on Wood Surface by Light-Irradiation and Heat Treatment Reviewed

KOHARA Mitsuhiro, MITSUI Katsuya, MURATA Akihiro, TSUCHIKAWA Satoru

Science report of the Faculty of Education, Gifu University. Natural science Vol. 28 ( 1 ) page： 57 - 60 2003

Application of time-of-flight near infrared spectroscopy to wood with anisotropic cellular structure. Reviewed

"Tsuchikawa, S.; Tsutsumi, S."

Aplied Spectroscopy Vol. 56 page： 869-876 2002.7

Application of time-of-flight near-infrared Spectroscopy to wood with anisotropic cellular structure

Tsuchikawa S, Tsutsumi S

APPLIED SPECTROSCOPY Vol. 56 ( 7 ) page： 869 - 876 2002.7

Application of time-of-flight near-infrared Spectroscopy to wood with anisotropic cellular structure Reviewed

S Tsuchikawa, S Tsutsumi

APPLIED SPECTROSCOPY Vol. 56 ( 7 ) page： 869 - 876 2002.7

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

The newly constructed optical measurement system, which was mainly composed of a parametric tunable laser and a near-infrared photoelectric multiplier, was introduced to clarify the optical characteristics of wood with anisotropic cellular structure on the basis of the time-of-flight near-infrared spectroscopy (TOF-NIRS). The combined effects of the cellular structure of the wood sample, the wavelength of the laser beam, and the detection position of transmitted light on the time-resolved profiles were investigated in detail. The substantial optical pathlength calculated from the time-resolved profile was outstandingly larger than the sample thickness. The substance of the wood was directly related to the time delay of light propagation. In applying TOF-NIRS to the cellular structural materials, it is very important to give attention to the difference in the light scattering within the cell wall and that caused by the multiple specular-like reflections between cell walls. The newly proposed empirical equation, considering the effects of optical parameters, could well express the wavelength and sample thickness dependency of the time delay of the peak maxima. The time-resolved profile was intensively governed by the combination of light-absorbing and -scattering conditions and the degree of anisotropy. These basic data will be essential for this system to put an in-process measurement system in the wood industry to practical use.

Web of Science

Application of time-of-flight near-infrared spectroscopy to wood with anisotropic cellular structure Reviewed

Tsuchikawa S., Tsutsumi S.

Applied Spectroscopy Vol. 56 ( 7 ) page： 869 - 876 2002.7

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

DOI： 10.1366/000370202760171545

Scopus

Application of time-of-flight near-infrared spectroscopy for detecting water core in apples. Reviewed

"Tsuchikawa, S.; Kumada, S.; Inoue, K.; Cho, R."

Journal of American Society of Horticultural Science Vol. 127 page： 303-308 2002.3

Application of time-of-flight near-infrared spectroscopy for detecting water core in apples

Tsuchikawa S, Kumada S, Inoue K, Cho RK

JOURNAL OF THE AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE Vol. 127 ( 2 ) page： 303 - 308 2002.3

Application of time-of-flight near-infrared spectroscopy for detecting water core in apples Reviewed

S Tsuchikawa, S Kumada, K Inoue, RK Cho

JOURNAL OF THE AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE Vol. 127 ( 2 ) page： 303 - 308 2002.3

Authorship：Lead author,　Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：AMER SOC HORTICULTURAL SCIENCE

Time-of-flight near-infrared spectroscopy (TOF-NIRS) was used to investigate optical characteristics of water-cored tissue in 'Fuji' apples [Malus sylvestris (L.) Mill. var. domestica (Borkh. Mansf.)]. The combined effects on the time resolved profiles of water core, laser beam wavelength, and detection position of transmitted light were investigated in detail. Attenuance of peak maxima (A(t)), time delay of peak maxima (Deltat), and variation of full width at half maximum (Deltaw) decreased gradually as water core increased. Water-cored tissue transmitted much more energy because of the filling of intercellular spaces with liquid, so that the light path time through a sample decreased. These parameters were also strongly dependent on detection position and wavelength of the laser beam. The substantial optical path length calculated from Deltat at lambda = 800 run was 10 to 17 times, while that for lambda = 900 nm varied from six to 11 times the distance of the diameter of the fruit. Results indicated the optimum optical parameter for detection of water core was Deltat.

Web of Science

Application of near infrared spectroscopy to wood discrimination. Reviewed

"Tsuchikawa, S.; Inoue, K.; Noma, J.; Hayashi, K."

Journal of Wood Science Vol. 49 page： 29-35 2002.1

Non-traditional Application of Time-of-Flight Near Infrared Spectroscopy to Biological Material Having Cellular Structure Reviewed

TSUCHIKAWA Satoru

Analytical Sciences/Supplements Vol. 17icas ( 0 ) page： i463 - i466 2002

Application of time-of-flight near-infrared spectroscopy for detecting water core in apples Reviewed

Tsuchikawa S., Kumada S., Inoue K., Cho R.K.

Journal of the American Society for Horticultural Science Vol. 127 ( 2 ) page： 303 - 308 2002

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of the American Society for Horticultural Science

Time-of-flight near-infrared spectroscopy (TOF-NIRS) was used to investigate optical characteristics of water-cored tissue in 'Fuji' apples [Malus sylvestris (L.) Mill. var. domestica (Borkh. Mansf.)]. The combined effects on the time resolved profiles of water core, laser beam wavelength, and detection position of transmitted light were investigated in detail. Attenuance of peak maxima (At), time delay of peak maxima (Δt), and variation of full width at half maximum (Δw) decreased gradually as water core increased. Water-cored tissue transmitted much more energy because of the filling of intercellular spaces with liquid, so that the light path time through a sample decreased. These parameters were also strongly dependent on detection position and wavelength of the laser beam. The substantial optical path length calculated from Δt λ = 800 nm was 10 to 17 times, while that for λ = 900 nm varied from six to 11 times the distance of the diameter of the fruit. Results indicated the optimum optical parameter for detection of water core was Δt.

DOI： 10.21273/jashs.127.2.303

Scopus

Directional characteristics of near infrared light reflected from wood Reviewed

Tsuchikawa S., Torii M., Tsutsumi S.

Holzforschung Vol. 55 ( 5 ) page： 534 - 540 2001.12

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

A near infrared auto-goniophotometer was designed to acquire detailed information on optical characteristics of a biological material which had a cellular structure, such as wood. The reflected light, which originated from the irradiation of polarized near infrared light, was separated into an unpolarized and a polarized component by using two polarizing filters. The standardized reflected intensities of each component at various incident angles θ and observation angles η, ρ,up(θ, η) and ρp(θ, η), were measured. Sitka spruce samples with various thicknesses were used. The measurements showed that the directional characteristics of the unpolarized component were affected significantly by the irradiation conditions and the sample thickness. Particularly, these varied with the wavelength of incident light λ. This shows that the directional characteristics models we proposed previously are reasonable. On the other hand, matrices of the directional characteristics for polarized components typically show an elliptical shape which is strongly affected by incident angle and only slighly by λ. Based on these results, the effects of sample thickness on the spectral directional characteristics were determined.

DOI： 10.1515/HF.2001.086

Scopus

Non-traditional Application of Time-of-Flight Near Infrared Spectroscopy to Biological Material Having Cellular Structure Invited Reviewed

Tsuchikawa S.

Analytical Sciences Vol. 17 page： 463-466 2001.10

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