研究者詳細 - 土川　覚

論文 - 土川　覚

分割表示 537 件中 161 - 180 件目／全件表示 >>

La spectroscopie proche infrarouge et le secteur des produits forestiers 査読有り

Leblon, B; Tsuchikawa, S

FORESTRY CHRONICLE 89 巻 ( 5 ) 頁： 575 - 576 2013年9月

Near-infrared spectroscopy and the forest products industry 査読有り Open Access

Leblon B., Tsuchikawa S.

Forestry Chronicle 89 巻 ( 5 ) 頁： 575 - 576 2013年9月

Near-Infrared Spectroscopy and the Forest Products Industry

Brigitte Leblon, Satoru Tsuchikawa

FORESTRY CHRONICLE 89 巻 ( 5 ) 頁： 575 - 575 2013年9月

Time-Resolved Principal Component Imaging Analysis of Chlorophyll Fluorescence Induction for Monitoring Leaf Water Stress 査読有り

Kobori Hikaru, Tsuchikawa Satoru

APPLIED SPECTROSCOPY 67 巻 ( 6 ) 頁： 594 - 599 2013年6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：Applied Spectroscopy

Chlorophyll fluorescence induction is widely applied to investigate plant growth conditions by calculating the ratio of its intensity at oxidized and reduced states. We examined the applicability of a time-resolved profile of chlorophyll fluorescence induction with the aid of multivariate analysis to monitor the leaf water stress. Principal component (PC) analysis of timeresolved images of chlorophyll fluorescence induction and their score images were reconstructed. Control leaves (non-stressed leaves) and water-stressed leaves could be classified by normalized PC3 score images. This technique has the potential to monitor the water stress condition of plants by using a simple device. © 2013 Society for Applied Spectroscopy.

DOI： 10.1366/12-06850

Web of Science

Scopus

PubMed

Time of Flight Near Infrared Spectroscopy for Nondestructive Measurement of internal quality in Grapefruit 査読有り

Kurata, Y, Tsuchida, T, Tsuchikawa, S

Journal of American Society of Horticultural Science 138 巻 ( 3 ) 頁： 225 - 228 2013年5月

Time-of-flight near-infrared spectroscopy for nondestructive measurement of internal quality in grapefruit 査読有り

Kurata Y., Tsuchida T., Tsuchikawa S.

Journal of the American Society for Horticultural Science 138 巻 ( 3 ) 頁： 225 - 228 2013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

We proposed a technique combining time-of-flight (TOF) and near-infrared spectroscopy (NIRS), termed TOF-NIRS, capable of measuring the time-resolved profiles of near-infrared (NIR) light with nanosecond resolution. Analysis of the variation in time-resolved profiles was used to estimate soluble solids concentration (SSC) and acidity in grapefruit (Citrus paradisi)*and the prediction accuracy was compared with the conventional NIR measurement device. In data processing*the cross-correlation function*which evaluated the similarity between the reference and transmitted beams*was introduced as an explanatory variable for partial least squares regression. TOF-NIRS predicted both SSC and acidity in grapefruit with higher precision than the conventional NIR measurement with respective r values of 0.72 and 0.85. Specifically*the superiority of TOF-NIRS was attributed to measurement time and prediction accuracy in determining acidity.

DOI： 10.21273/jashs.138.3.225

Scopus

Time-of-flight Near-infrared Spectroscopy for Nondestructive Measurement of Internal Quality in Grapefruit

Kurata Yohei, Tsuchida Tomoe, Tsuchikawa Satoru

JOURNAL OF THE AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE 138 巻 ( 3 ) 頁： 225 - 228 2013年5月

Applicability of Vis-NIR hyperspectral imaging for monitoring wood moisture content (MC) 査読有り

Kobori, H; Gorretta, N; Rabatel, G; Bellon-Maurel, V; Chaix, G; Roger, JM; Tsuchikawa, S

HOLZFORSCHUNG 67 巻 ( 3 ) 頁： 307 - 314 2013年4月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Holzforschung

Visible-near-infrared hyperspectral imaging was tested for its suitability for monitoring the moisture content (MC) of wood samples during natural drying. Partial least-squares regression (PLSR) prediction of MC was performed on the basis of average reflectance spectra obtained from hyperspectral images. The validation showed high prediction accuracy. The results were compared concerning the PLSR prediction of MC mapping from raw spectra and standard normal variate (SNV) treatment. SNV pretreatment leads to the best results for visualizing the MC distribution in wood. Hyperspectral imaging has a high potential for monitoring the water distribution of wood.

DOI： 10.1515/hf-2012-0054

Web of Science

Scopus

High accuracy rapid prediction and feasibility of on-site nondestructive estimation of Para rubber quality by spectroscopic methods 査読有り

Inagaki Tetsuya, Sirisomboon Panmanas, Liu Chang, Thanapase Warunee, Tsuchikawa Satoru

JOURNAL OF WOOD SCIENCE 59 巻 ( 2 ) 頁： 119 - 126 2013年4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 Wood Science

The aim of this study was to investigate convenient spectroscopic evaluation method of Para rubber quality. Ultra violet-near infrared (UV-NIR 370-1085 nm) spectra of latex were measured in transmittance mode. Calibrations for total solid content (TSC) and dry rubber content (DRC) were developed using spectral data set with aid of partial least square regression analysis using 57 samples. UV-NIR spectra of latex provided good regression models between measured and predicted values of TSC and DRC with determination coefficient for cross-validation of 0. 96 and 0. 97, respectively. The ranks were 2 and 1, respectively. This study suggests high accuracy in-line quality control of latex using UV-NIR spectroscopy. The long wavelength NIR spectra of bark were scanned to check the feasibility of on-site evaluation of latex quality by measuring the NIR spectra of standing tree. From the observation of near infrared spectra, it was shown that there was more latex signal in outer part of wood bark than in inner part of wood bark. This result suggests that the focal point should be on the outer part of bark to get the signal of latex when we measure the spectra of standing tree. © 2012 The Japan Wood Research Society.

DOI： 10.1007/s10086-012-1305-3

Web of Science

Scopus

High accuracy rapid prediction and feasibility of on-site nondestructive estimation of Para rubber quality by spectroscopic method 査読有り

Inagaki, T.; Sirisomboon, P.; Liu, C.; Thanapase, W.; Tsuchikawa, S.

Journal of Wood Science 59 巻頁： 119-126 2013年

Applicability of Vis-NIR hyperspectral imaging for monitoring wood moisture content (MC) 査読有り

Kobori, H.; Gorretta, N.; Rabatel, G.; Bellon-Maurel, V.; Chaix, G.; Roger, J.-M.; Tsuchikawa, S.

Holzforschung 67 巻 ( 3 ) 頁： 307-314 2013年

Establishment of near infrared archaeometry 招待有り査読有り

Inagaki, T.; Tsuchikawa, S.

NIR News 24 巻 ( 7 ) 頁： 4-6 2013年

Mapping of Leaf Water Content Using Near-Infrared Hyperspectral Imaging", Applied Spectroscopy 査読有り

Higa, S.; Kobori, H.; Tsuchikawa, S.

Applied Spectroscopy 67 巻 ( 11 ) 頁： 1302-1307 2013年

A review of near-infrared spectroscopy for monitoring moisture content and density of solid wood 査読有り

Leblon, B.; Adedipe, O.; Hans, G.; Haddadi1, A.; Tsuchikawa, S.; Burger; J.; Stirling, R; Pirouz, Z.; Groves, K.; Nader, J.; LaRocque, A.

The Forestry Chronicle 89 巻 ( 5 ) 頁： 595-606 2013年

Vis-NIR Spectroscopy for the On-site Prediction of Wood Properties 査読有り

Kobori, H.; Kojima, M.; Yamamoto, H.; Sasaki, Y.; Yamaji, F. M.; Tsuchikawa, S.

The Forestry Chronicle 89 巻 ( 5 ) 頁： 36-43 2013年

Time-Resolved Principal Component Imaging Analysis of Chlorophyll Fluorescence Induction for Monitoring Leaf Water Stress 査読有り

Kobori, H.; Tsuchikawa, S.

Applied Spectroscopy 67 巻 ( 6 ) 頁： 594-599 2013年

A Review of Recent Near Infrared Research for Wood and Paper Part 2 招待有り査読有り

Tsuchikawa, S.; Schwanninger, S.

Applied Spectroscopy Review 48 巻頁： 560-587 2013年

Time of Flight Near Infrared Spectroscopy for Nondestructive Measurement of internal quality in Grapefruit 査読有り

Kurata, Y.; Tsuchida, T.; Tsuchikawa, S.

Journal of American Society of Horticultural Science 138 巻頁： 225-228 2013年

Prediction of wood density using near infrared-based partial least squares regression models calibrated with X-ray microdensity

Rodrigues, J. C.; Fujimoto, T.; Schwanninger, M.; Tsuchikawa, S.

NIR News 24 巻 ( 2 ) 頁： 4-5,8 2013年

Time-Resolved Principal Component Imaging Analysis of Chlorophyll Fluorescence Induction for Monitoring Leaf Water Stress

Kobori, H, Tsuchikawa, S

Applied Spectroscopy 67 巻 ( 6 ) 頁： 594-599 2013年

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