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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.


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.


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.


Jobu K.,Kochi Medical School Hospital | Yokota J.,Kochi Medical School Hospital | Yoshioka S.,Kochi Medical School Hospital | Moriyama H.,Kochi Prefectural Industrial Technology Center | And 4 more authors.
Food Research International | Year: 2013

Goishi tea is a post-fermented tea produced in Kochi, Japan. This study aimed to investigate the anti-obesity effect of Goishi tea by using 3T3L-1 cells and mice model. In 3T3L-1 cells, Goishi tea showed a significant stimulatory effect on fat decomposition compared with green tea. The C57BL/6J mice were fed with a high-fat diet to create a diet-induced obesity model for investigating the benefits of Goishi tea. Mice were categorized into 5 groups. Within the high-fat diet groups, body mass, blood glucose and visceral fat mass were found to be lower among the Goishi tea group compared with the tap water groups. Having conducted histological evaluation of adipocytes, an increase in fat was observed in the high-fat diet groups compared with the normal diet groups. The degree of fat increase was smaller among the Goishi tea and green tea groups compared with the tap water groups. Results suggested that Goishi tea had a suppressive effect on fat cell enlargement during the progression of obesity as well as a suppressive effect on factors such as tumor necrosis factor alpha and interleukin-6. In conclusion, Goishi tea is likely effective against diet-induced obesity. © 2013 Elsevier Ltd.


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.

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