Solutions prepared from steamed naked barley or rice by enzymatic saccharification were fermented under the addition of rice koji, rice koji powder, polished rice, rice powder or active carbon, in order to examine effects of additives on the formation of flavor components in sake.
1. The formation of flavor components was increased with various additives, and the amount of isoamyl alcohol and isoamyl acetate formed were the largest with the addition of active carbon. The amount of isoamyl alcohol produced was double, and that of isoamyl acetate was 6 times as large with active carbon addition as that of the control.
2. In the fermentation with various additives, the increase in yeast cell number was parallel to that of flavor components.
3. The amount of flavor components formed with pulverized materials was more than that formed with not-pulverized materials, when equal amount was added to the mash.
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