| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Outline of Final Research Achievements |
Red color of wine is very important parameter for consumers. Anthocyanins as pigment are extracted from skin of grape into wine. But the concentrations of anthocyanins are reduced during vinification. Some parameters are affect this reduction fo anthocyanin contents, such as hydration with water, decolorization by sulfite, and adsorption toward skin. In this study, we focused the adsorption properties of grape skin. Anthocyanins adsorption was inhibited by increasing concentration of ethanol in medium. Adsorption of anthocyannins was maximal at pH 3.2, and it was declined other pH. Tannin, which stabilze anthocyanin during vinification, adsorption property was in inverse manner. These result may important for making hight qulality red wines.
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