| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Outline of Final Research Achievements |
Reaction behavior of monosaccharides was evaluated in subcritical aqueous alcohols. Yield of fructose from glucose was higher in subcritical aqueous ethanol than in subcritical water, and a small amount of mannose was also formed. Because its reasons were not clear, effects of the ethanol addition were kinetically analyzed. Rate constants for the isomerization between the monosaccharides increased with increasing ethanol concentration. Rate constants for the decomposition of saccharides also increased; however, they were not more remarkable than those for the isomerization. Subcritical treatment in aqueous alcohols, including methanol, 1-propanol, and 2-propanol, also increased the yield of fructose. The subcritical treatment was applied to other saccharides. As a result, corresponding rare saccharides, especially for keto-type ones, such as D-tagatose, were formed. This treatment was also applicable to produce rare keto-disaccharides, such as maltulose.
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