Kochi Prefectural Industrial Technology Center

Kochi Kochi, Japan

Kochi Prefectural Industrial Technology Center

Kochi Kochi, Japan
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Yokota J.,Kochi Medical School Hospital | Jobu K.,Kochi Medical School Hospital | Yoshioka S.,Kochi Medical School Hospital | Kashiwagi T.,Kochi University | And 6 more authors.
Food Chemistry | Year: 2013

This study investigated the influence of Goishi-tea on visceral fat weight in induced obese mice. Mice were divided into two main groups, normal and obesity. In obesity group, mice were fed with high-fat diet. Goishi-tea including its fractions (ethyl-acetate layer and water layer) was administrated in normal and obesity three sub-groups. Results showed no influence of Goishi-tea in normal group. However, visceral fat weight, size of adipose cell and cholesterol level were significantly decreased in obesity group fed Goishi-tea compared to control group. Moreover, adiponectin levels tended to increase and adipocytokines has significant values lower in obesity group fed Goishi-tea compared to control group. Interestingly, Goishi tea involved in the high-fat diet induced-obese mice can inhibit fat accumulation and maintain adiponectins without increasing tumor necrosis factor-alpha and interleukin-6. It would be beneficial for the prevention of metabolic syndrome and obesity-related disorder. © 2012 Elsevier Ltd. All rights reserved.


Kono T.,Kochi Prefectural Industrial Technology Center | Ueda K.,Kyushu Institute of Technology | Yanagi H.,Yamanashi University | Kim S.W.,Sungkyunkwan University | Hosono H.,Tokyo Institute of Technology
Solid State Communications | Year: 2013

Thermoelectric properties and figure of merit were evaluated from the Seebeck coefficient S, electrical conductivity σ, and thermal conductivity κ measured at high temperatures for perovskite-type ceramics of Ba 1-xLaxSnO3 with x=0.002, 0.005, and 0.008, which were prepared by a polymerized complex method and a subsequent spark plasma sintering technique. All the polycrystalline dense ceramics showed n-type degenerate semiconducting behavior in the temperature range of 373-1073 K. The La content dependence of the S values revealed successful increase in the electron carriers with the La doping in this x range. The κ values remained almost unchanged with x showing ∼9.6 Wm-1 K-1 at room temperature and decreased with increasing temperature. The electronic thermal conductivities calculated by the Wiedemann-Franz law as well as the T-1 dependence of the κ values indicate that the phonon thermal conductivity was dominant. The dimensionless figure of merit ZT increased with increasing temperature for all the ceramics and showed ∼0.1 at 1073 K for the ceramics with x=0.002 and 0.005. © 2013 Elsevier Ltd. All rights reserved.


Kono T.,Kochi Prefectural Industrial Technology Center | Ueda K.,Kyushu Institute of Technology | Yanagi H.,Tokyo Institute of Technology | Hosono H.,Tokyo Institute of Technology
Materials Science and Engineering B: Solid-State Materials for Advanced Technology | Year: 2010

To elucidate the thermoelectric properties at high temperatures, perovskite-type La-doped BaSnO3 ceramics were fabricated by a polymerized complex (PC) method and subsequent spark plasma sintering (SPS) technique. Fine powders of Ba1-xLaxSnO3 (x = 0.00-0.07) were prepared by the PC method using citrate complexes, and SPS treatment converted the powders into dense ceramics with relative densities of 93-97%. The La content dependence of the lattice parameter suggested that the solubility of La for Ba sites was approximately x = 0.03. The temperature dependence of the electrical conductivity σ and Seebeck coefficient S showed that each La-doped ceramic was an n-type degenerate semiconductor in the measured temperature range of 373-1073 K. The La content dependence of the S values indicated that the electron carrier concentration increased successively up to x = 0.03, which was the solubility limit of the La atoms. The thermoelectric power factors S2σ increased drastically with La doping, and reached a maximum for x = 0.01 with values of 0.8 × 10 -4 W m-1 K-2 at 373 K to 2.8 × 10 -4 W m-1 K-2 at 1073 K. © 2009 Elsevier B.V.


Kono T.,Kochi Prefectural Industrial Technology Center
Solid State Communications | Year: 2012

To elucidate the thermoelectric properties at high temperatures, the electrical conductivity and Seebeck coefficient were measured at temperatures between 423 K and 973 K for perovskite-type ceramics of BaBi 1-xSb xO 3 solid solutions with x=0.0-0.5. All the ceramics exhibit p-type semiconducting behaviors and electrical conduction is attributed to hopping of small polaronic holes localized on the pentavalent cations. Substitution of Bi with Sb causes the electrical conductivity σ and cell volume to decrease, but the Seebeck coefficient S to increase, suggesting that the Sb atoms are doped as Sb 5 and replace Bi 5, reducing 6s holes conduction from Bi 5(6s 0) to Bi 3 (6s 2). The thermoelectric power factor S 2σ has values of 6×10 -8-3×10 -5 W m -1 K -2 in the measured temperature range, and is maximized for an Sb-undoped BaBiO 3-δ, but decreases upon Sb doping due to the decreased σ values. © 2012 Elsevier Ltd. All rights reserved.


Hino T.,Niihama National College of Technology | Nishida M.,Kochi prefectural industrial technology center | Araki T.,Toyo Industrial Creative Center
Journal of Laser Micro Nanoengineering | Year: 2011

Tantalum oxide films were prepared using pulsed laser deposition without any exchange of the Ta target. As the number of laser shots increased, the density of metal-rich droplets on the film in-creased and the droplet diameter became larger, leading to an increase in the total surface area of droplets. The corrosion resistance of the films was characterized by potentiostatic testing in a 3.5 mass% NaCl solution at 400 mV. It was found that the corrosion resistance improved as the O/Ta composition ratio approached its stoichiometric value. Corrosion was observed to originate at local surface pits produced by Cl-1 ions. These pits were formed at the boundaries between the film and droplets whose diameters were larger than the film thickness.


Sumida T.,Kochi Prefectural Industrial Technology Center | Yamashita M.,Kochi Prefectural Industrial Technology Center | Okazaki Y.,Kochi Prefectural Industrial Technology Center | Kawakita H.,Kochi Prefectural Industrial Technology Center | Fukutomi T.,Kochi Prefectural Industrial Technology Center
Analytical Sciences | Year: 2012

A novel cellulose-based resin functionalized with polyallylamine was synthesized. It was applied to the collection of phosphate in environmental water samples, followed by concentration determination using an inductively coupled plasma-atomic emission spectrometer (ICP/AES). The synthesized resin, cellulose-glycidylmethacrylate-polyallylamine (CGP), showed good adsorption behavior toward trace amounts of phosphate over a wide pH range. The adsorbed-analyte can be easily eluted using 0.5 M hydrochloric acid; its recoveries was found to be 80-100%. The CGP resin synthesized was packed in a mini-column, which was then installed in a computer-controlled auto-pretreatment system for on-line collection/concentration and determination of trace phosphate by ICP/AES. The limit of detection for phosphate was found to be 0.6 μg P l-1. The sample volumes were only 5 ml and the total analysis time was about 4 min. The developed method with CGP resin was successfully applied to the determination of phosphate in river water and tap water samples with satisfactory results. The recovery test showed that common matrices that may exist in environmental waters did not interfere with the determination of phosphate. © The Japan Society for Analytical Chemistry.


Teramoto M.,Kochi University | Onodera K.-I.,Kochi University | Moriyama H.,Kochi Prefectural Industrial Technology Center | Komatsu A.,Kochi University | And 2 more authors.
International Journal of Systematic and Evolutionary Microbiology | Year: 2015

A Gram-stain-negative, non-motile, mesophilic, aerobic, rod-shaped bacterium, strain 2A-8T, was isolated from surface seawater at Muroto city, Kochi prefecture, Japan. The strain produced myxol as a major carotenoid. Phylogenetic analyses based on 16S rRNA gene sequences showed that the strain fell within the family Flavobacteriaceae and was related most closely to the genus Aquimarina (91.0–94.4% 16S rRNA gene sequence similarity to the type strains of species of this genus). The DNA G+C content was 35 mol%. The major fatty acids were iso-C15: 0 and iso-C17: 0 3-OH. The major polar lipids were phosphatidylethanolamine, an unidentified aminolipid and five unidentified lipids. Menaquinone 6 was detected as the sole isoprenoid quinone. On the basis of phenotypic, genotypic and chemotaxonomic data, strain 2A-8T represents a novel genus and species, for which the name Aurantiacicella marina gen. nov., sp. nov. is proposed. The type strain of Aurantiacicella marina is 2A-8T (5NBRC 111187T5KCTC 42676T). © 2015 IUMS.


Morita Y.,Kochi Prefectural Industrial Technology Center | Morita Y.,Nishinihon Institute of Technology | Okazaki Y.,Kochi Prefectural Industrial Technology Center | Kawakita H.,Kochi Prefectural Industrial Technology Center | Sumida T.,Kochi Prefectural Industrial Technology Center
Bunseki Kagaku | Year: 2012

An analysis method for halogens in organic materials was examined by air combustion coupled with ion chromatography. In this system, a sample of 0.1-0.5 g was weighted and ignited slowly in a quartz combustion tube at 1000°C with air gas at a flow rate of 2.5 L min-1. The combustion products were collected into 20 mL of a 40 mM potassium hydroxide solution in which 20 μxL of 3% hydrogen peroxide was added for reducing. Halogens (F, Cl, Br) were determined by ion chromatography. Recoveries for the halogens tested were almost 100 ± 10%. The accuracy of the proposed method was evaluated by analyzing a standard reference material of polyethylene (NMIJ CRM8108-a, AIST Japan and ERM-EC680K, IRMM Belgium). The values of Br and Cl obtained with the present method showed good agreement with the certified values, as judged from standard deviation. The present method was also applied to proficiency testing for the determination of bromine in a plastic material. The analytical results for the z score were 0.199 (low con.) and - 0.597 (high con.). © 2012 The Japan Society for Analytical Chemistry.


Matsumoto Y.,Kochi University of Technology | Moriyama H.,Kochi Prefectural Industrial Technology Center
Nippon Shokuhin Kagaku Kogaku Kaishi | Year: 2012

Here we report our development of a novel freeze concentration apparatus for suspension crystallization. The apparatus was evaluated after freeze concentration of Pomelo (Citrus grandis Osbeck) juice produced in Kochi prefecture. The stock juice before the concentration process was 11.0 °Brix. The consistency of the resulting juice concentrate ranged from 13.2 to 38.7 °Brix. Levels of fructose, glucose, sucrose, citric acid, malic acid, ascorbic acid, limonin, naringin, hesperidin and amino acids were higher in the juice concentrate than in the stock juice, when analyzed by the HPLC method. Brix degree was linearly correlated with the levels of each component. After freeze concentration processes (n=7) ranging from 29.7∼42.0°Brix, the average recovery rate was 87.9%. These results suggest that our apparatus is effective for stable concentration of Pomelo juice and has the capability to recover over 90 % of juice concentrate.


PubMed | Kochi Prefectural Industrial Technology Center
Type: Journal Article | Journal: Analytical sciences : the international journal of the Japan Society for Analytical Chemistry | Year: 2012

A novel cellulose-based resin functionalized with polyallylamine was synthesized. It was applied to the collection of phosphate in environmental water samples, followed by concentration determination using an inductively coupled plasma-atomic emission spectrometer (ICP/AES). The synthesized resin, cellulose-glycidylmethacrylate-polyallylamine (CGP), showed good adsorption behavior toward trace amounts of phosphate over a wide pH range. The adsorbed-analyte can be easily eluted using 0.5 M hydrochloric acid; its recoveries was found to be 80 - 100%. The CGP resin synthesized was packed in a mini-column, which was then installed in a computer-controlled auto-pretreatment system for on-line collection/concentration and determination of trace phosphate by ICP/AES. The limit of detection for phosphate was found to be 0.6 g P l(-1). The sample volumes were only 5 ml and the total analysis time was about 4 min. The developed method with CGP resin was successfully applied to the determination of phosphate in river water and tap water samples with satisfactory results. The recovery test showed that common matrices that may exist in environmental waters did not interfere with the determination of phosphate.

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