Nagoya University · Engineering
Professor Tetsuya Inagaki's research lab specializes in the advanced characterization and analysis of natural materials, particularly wood and plant-based systems, using spectroscopic and imaging techniques. The lab focuses on understanding the molecular and structural changes in wood due to aging, hydrothermal treatment, and moisture content variations, employing methods such as near-infrared spectroscopy, terahertz time-domain spectroscopy, and X-ray diffraction. A key research direction involves the development of non-destructive analytical models to assess wood quality, crystallinity, and water dynamics, with applications in cultural heritage preservation and sustainable materials science. The lab also explores functional polymers, including ferrocene-containing siloxanes, for potential electrochemical applications.
Figures are computed from collected data and may differ slightly.
The change of crystalline structure in hydrothermally treated hinoki wood was investigated by means of Fourier-transform near-infrared spectroscopy in combination with a deuterium exchange method and X-ray diffraction. The results were compared with analogous data of dry-exposed archeological wood taken from an old wooden temple. Although the decomposition of the amorphous regions in cellulose and hemicelluloses, which corresponds to an increase of the degree of crystallinity, was observed for b
We investigated the adsorption/desorption mechanism of water and the variation of water adsorption for modern and archaeological wood using near-infrared spectroscopy. A mixture model of water was used to decompose the near-infrared difference spectra into three components (free water molecules (S 0), those with one OH group engaged in hydrogen bonding (S1), and those with two OH groups engaged in hydrogen bonding (S2)) based on a principal component analysis. The variations of each water compon
Siloxane polymers containing ferrocene and 1,1′-dimethylferrocene as pendants have been synthesised and characterised; cyclic voltammetry studies using electrodes modified with these polymers showed that the electrochemical properties of ferrocene and 1,1′-dimethylferrocene were maintained.
T. Inagaki, M. Hunter, X. Q. Yang, T. A. Skotheim and Y. Okamoto, J. Chem. Soc., Chem. Commun., 1988, 126 DOI: 10.1039/C39880000126
Abstract Wood is relatively transparent to terahertz (THz) radiation with wavelengths in the submillimeter range. This radiation has a high potential for sensing and imaging wood with a good spatial resolution. THz is especially sensitive to moisture content, fiber alignment, and density – all of which are critical in the manufacturing of wood products. In this work, a systematic study was undertaken on 46 very different wood species by means of THz time-domain spectroscopy with density determin
In this study, an approach to visualize the spatial distribution of sugar content in white strawberry fruit flesh using near-infrared hyperspectral imaging (NIR-HSI; 913-2166 nm) is developed. NIR-HSI data collected from 180 samples of "Tochigi iW1 go" white strawberries are investigated. In order to recognize the pixels corresponding to the flesh and achene on the surface of the strawberries, principal component analysis (PCA) and image processing are conducted after smoothing and standard norm
From the viewpoint of combating illegal logging and examining wood properties, there is a contemporary demand for a wood species identification system. Several nondestructive automatic identification systems have been developed, but there is room for improvement to construct a highly reliable model. The present study proposes cognitive spectroscopy that combines near infrared hyperspectral imaging (NIR-HSI) with a deep convolutional neural network approach. We defined "cognitive spectroscopy" as
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and electrochemical characterization of siloxane polymers containing hydroquinone and 1,4-naphthohydroquinoneT. Inagaki, H. S. Lee, P. D. Hale, T. A. Skotheim, and Y. OkamotoCite this: Macromolecules 1989, 22, 12, 4641–4643Publication Date (Print):December 1, 1989Publication History Published online1 May 2002Published inissue 1 December 1989https://pubs.acs.org/doi/10.1021/ma00202a043https://doi.org/10.1021/ma00202a043research-articleACS Publ
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 beech as an analogue of archaeological wood were systematically measured. Partial least squares (PLS) regression analysis was employed to predict compressive Young's mod
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