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No full text1.学術交流協定一覧2.香川大学インターナショナルオフィス規則3.香川大学インターナショナルオフィス会議規程4.香川大学国際研究支援センター規程5.香川大学留学生センター規程6.香川大学グローバルカフェセンター規程7.インターナショナルオフィス教職員一覧departmental bulletin pape
Effects of solution cooling and shading treatments on quality and growth of hydroponic Takana
No full textIn this study, solution cooling and shading were applied to hydroponic takana (Brassica juncea var. integrifolia) just before harvest to investigate their effects on quality and growth. It was suggested that the nitrate nitrogen content of takana leaves could be reduced, and the sugar content could be increased by continuous day and night solution cooling treatments. The effects of the solution cooling treatment on ascorbic acid content were not significant. In addition, the nitrate-nitrogen content was reduced when the fertilizer content in the solution was reduced, but the appearance quality was also decreased. On the other hand, nitrate-nitrogen content increased, and ascorbic acid content and sugar content decreased when the seedlings were shaded. Long-term shading treatment suppressed the growth of the seedlings, suggesting the possibility of improving the quality of the takana plants.本研究では、タカナの食味改善を図るため、収穫直前の水耕タカナに培養液冷却処理と遮光処理を行い、品質と生育に及ぼす影響を調査した。昼夜連続の培養液冷却処理では、タカナの硝酸態窒素含量を低減させ、糖度を上昇させる可能性が示唆された。アスコルビン酸含量に関しては、培養液冷却処理による影響は大きくなかった。また、培養液中の肥料分を低減すると硝酸態窒素含量は低下したが、外観品質も低下した。一方で、遮光処理を行うと、硝酸態窒素含量が増加しアスコルビン酸含量と糖度が低下した。また、長期間の遮光では生育が抑制されたが、食味改善の可能性が示唆された。departmental bulletin pape
緑茶粉末添加食はラットの体脂肪蓄積を低減しインスリン抵抗性を改善する
No full textObesity is an important public health issue and a major cause of global health problems. Green tea is highly valued for its health benefits against obesity. However, most previous studies have used green tea extract as the experimental material and studies using green tea powder are limited. In this study, we examined the effects of dietary green tea powder supplementation on body fat accumulation and insulin resistance in rats that were fed a high-fat and high-sucrose diet, one that typically causes obesity. Male Wistar rats (3-weeks-old) were fed either a high-fat and high-sucrose diet (C diet) or a 5% green tea powder-supplemented diet (G diet) for eight weeks. Final body weight, weight gain, food intake, food efficiency, and heart and kidney weights did not differ between the groups. However, the weights of intra-abdominal adipose tissues, carcass fat, and total body fat were significantly lower in Group G than that in Group C. Homeostatic model assessment of insulin resistance (HOMA-IR) was significantly lower, and the quantitative insulin sensitivity check index (QUICKI) was higher in Group G compared with Group C. These results suggested that dietary green tea powder supplementation significantly reduced body fat accumulation in rats and improved insulin resistance. Green tea powder has anti-obesity effects and can be used as excellent functional food.肥満は全世界的に重要な健康問題である。緑茶の摂取は肥満の予防・改善に対して非常に有効であることが報告されている。しかしながら、ほとんどの研究は緑茶抽出液あるいは含有抽出成分を実験素材として用いており、緑茶粉末を実験素材として用いた研究は少ない。そこで、本研究では、緑茶粉末添加食をラットに与え、緑茶粉末が体脂肪蓄積とインスリン抵抗性に及ぼす影響について検討した。3週齢Wistar系雄ラットに高脂肪・高ショ糖食（C）あるいは5%緑茶粉末添加食（G）を与え、8週間飼育した。最終体重、体重増加量、食餌摂取量、および食餌効率には2群間に差を認めなかったが、腹腔内脂肪組織重量、屠体脂肪量・脂肪率、および総体脂肪量・脂肪率は、C群に比べてG群で有意に低値を示した。HOMA-IRはC群に比べてG群で有意に低く、QUICKIはC群に比べてG群で有意に高かった。これらの結果から、緑茶粉末添加食はラットの体脂肪蓄積を低減し、インスリン抵抗性を改善することが示唆された。緑茶粉末は抗肥満作用を有する優れた機能性食材であると考えられる。departmental bulletin pape
