研究者詳細 - 土川　覚

論文 - 土川　覚

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Near-infrared spectroscopic monitoring of the diffusion process of deuterium-labeled molecules in wood. Part II: Hardwood

Tsuchikawa S, Siesler HW

APPLIED SPECTROSCOPY 57 巻 ( 6 ) 頁： 675 - 681 2003年6月

Near-infrared spectroscopic monitoring of the diffusion process of deuterium-labeled molecules in wood. Part I: softwood. 査読有り

Tsuchikawa S, Siesler HW

Applied spectroscopy 57 巻 ( 6 ) 頁： 667 - 74 2003年6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

The diffusion process of several molecules (D2O, n-butanol (OD) and t-butanol (OD)) In softwood (Sitka spruce) was investigated by means of a deuterium exchange method and Fourier transform near-infrared (FT-NIR) polarization spectroscopy. The location of OH groups in different states of order of cellulose in wood was clarified by analyzing the FT-NIR transmission spectra ranging from 7200 to 6000 cm-1. Four absorption bands were assigned to 2 × ν(OH) absorptions of the amorphous regions, OH groups in semicrystalline regions, and two types of intramolecular hydrogen-bonded OH groups in the crystalline regions, respectively. The saturation level of accessibility was very different for these absorption bands (i.e., 70-80, 60, and 40-50% for the amorphous, semi-crystalline, and crystalline regions, respectively). However, the saturation accessibilities for each absorption band varied little with molecular structure and geometry of the diffusants. The diffusion rate of D2O was much faster than that of n-butanol (OD) and t-butanol (OD) for all states of orders. The size effect of the butanols led to slight differences in the diffusive transport in the crystalline regions.

DOI： 10.1366/000370203322005364

Scopus

PubMed

近赤外分光法の木材非破壊検査への応用招待有り

土川覚

木工機械 197 巻頁： 2-5 2003年6月

Near-infrared spectroscopic monitoring of the diffusion process of deuterium-labeled molecules in wood. Part I: Softwood 査読有り

Tsuchikawa S, Siesler HW

APPLIED SPECTROSCOPY 57 巻 ( 6 ) 頁： 667 - 674 2003年6月

Near-infrared spectroscopic monitoring of the diffusion process of deuterium-labeled molecules in wood. Part II: Hardwood 査読有り

Tsuchikawa S., Siesler HW

APPLIED SPECTROSCOPY 57 巻 ( 6 ) 頁： 675 - 681 2003年6月

Near-infrared spectroscopic monitoring of the diffusion process of deuterium-labeled molecules in wood. Part II: Hardwood 査読有り

Tsuchikawa S, Siesler HW

APPLIED SPECTROSCOPY 57 巻 ( 6 ) 頁： 675 - 681 2003年6月

Near-infrared spectroscopic monitoring of the diffusion process of deuterium-labeled molecules in wood. Part II: Hardwood 査読有り

Tsuchikawa S, Siesler HW

APPLIED SPECTROSCOPY 57 巻 ( 6 ) 頁： 675 - 681 2003年6月

Near-infrared spectroscopic monitoring of the diffusion process of deuterium-labeled molecules in wood. Part II: Hardwood 査読有り

Tsuchikawa S, Siesler HW

APPLIED SPECTROSCOPY 57 巻 ( 6 ) 頁： 675 - 681 2003年6月

Near-infrared spectroscopic monitoring of the diffusion process of deuterium-labeled molecules in wood. Part II: Hardwood 査読有り

Tsuchikawa S, Siesler HW

APPLIED SPECTROSCOPY 57 巻 ( 6 ) 頁： 675 - 681 2003年6月

Near-infrared spectroscopic monitoring of the diffusion process of deuterium-labeled molecules in wood. Part II: Hardwood 査読有り

Tsuchikawa S, Siesler HW

APPLIED SPECTROSCOPY 57 巻 ( 6 ) 頁： 675 - 681 2003年6月

Application of time-of-flight near-infrared spectroscopy to detect sugar and acid content in Satsuma mandarin

Tsuchikawa S, Sakai E, Inoue K, Miyamoto K

JOURNAL OF THE AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE 128 巻 ( 3 ) 頁： 391 - 396 2003年5月

Application of time-of-flight near-infrared spectroscopy to detect sugar and acid content in Satsuma mandarin 査読有り

Tsuchikawa S., Sakai E., Inoue K., Miyamoto K.

Journal of the American Society for Horticultural Science 128 巻 ( 3 ) 頁： 391 - 396 2003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：Journal of the American Society for Horticultural Science

Time-of-flight near infrared spectroscopy (TOF-NIRS) was applied to the detection of sugar and acid content in Satuma mandarin (Citrus unshiu Marc). The combined effects on the time resolved profiles of soluble solids, free acids, laser beam wavelength, and detection position of transmitted light were investigated in detail. Attenuance of peak maxima (At) and time delay of peak maxima (Δt) increased as sugar content increased. However, these optical parameters decreased with increases in acid content. In the case of a model sample of a polyurethane block immersed in specified solutions, At and Δt decreased by adding sucrose or citric acid. These results suggested that time resolved profile was governed not only by the concentration of soluble solid or free acid but also by other inherent factors of a fruit; for example, an optical characteristic of tissue or difference in refractive index between the tissue substance and the liquid. Results indicated the optimum optical parameters for detection of sugar and acid content were At and Δt, respectively.

DOI： 10.21273/jashs.128.3.0391

Scopus

Application of Near Infrared Spectroscopy (NIR) to light-irradiated wood 査読有り

Mitsui, K; Tsuchikawa, S

HOLZ ALS ROH-UND WERKSTOFF 61 巻 ( 2 ) 頁： 159 - 160 2003年4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：Holz Als Roh Und Werkstoff

The absorbility of water in wood varies with the light-irradiation time. Thus, near infrared spectroscopy proved to be a useful method allowing the detection of changes in chemical structure of wood after light-irradiation. In addition, it may also be suitable for the realization of a new coloring method of wood.

DOI： 10.1007/S00107-002-0361-6

Web of Science

Scopus

Application of near-infrared spectroscopy to wood discrimination

Tsuchikawa Satoru, Inoue Kinuyo, Noma Junichi, HAYASHI Kazuo

Journal of wood science 49 巻 ( 1 ) 頁： 29 - 35 2003年2月

Application of near-infrared spectroscopy to wood discrimination 査読有り

TSUCHIKAWA Satoru, INOUE Kinuyo, NOMA Junichi, HAYASHI Kazuo

Journal of Wood Science 49 巻 ( 1 ) 頁： 29 - 35 2003年2月