밤 첨가 약주를 제조할 때 옥수수가루를 이용한 것과 쌀을 이용해 담은 것의 pH와 총산을 비교하였다. 발효과정 중 pH를 비교하였을 때, 옥수수가루를 사용하여 제조한 약주가 쌀을 사용하여 담은 약주보다 높은 pH를 보였다. 또한(그리고) 발효과정 중 총산을 비교하였을 때, 쌀을 이용해 담은 약주의 총산 함량이 옥수수가루를 이용해 담은 약주의 총산 함량 보다 높게 나타났다. koji와 효소의 사용 여부에 따른 밤 첨가 약주의 발효과정 중 환원당 함

Fermentation characteristics of chestnut-added yakju prepared using various proportions of raw materials such as rice koji, rice flour, cornflour koji and cornflour were investigated. The pH of chestnut-added yakju prepared with cornflour koji and saccharified cornflour showed a higher value than that of chestnut-yakju prepared with rice koji and saccharified rice flour. The total acid content of chestnut-added yakju prepared with rice koji and saccharified rice flour was higher than that of chestnut-added yakju prepared using cornflour koji and sacharified cornflour. The reducing of sugar in chestnut-added yakju prepared with saccharified rice flour or saccharified cornflour was rapid at the first brewing stage, decreased dramatically after 2 days, and then decreased slowly after 5 days of fermentation. The value of L and a, the Hunter values, were high in chestnut-added yakju prepared with cornflour koji, and value b was high in chestnut-added yakju with rice koji. The content of iso-amyl alcohol was the highest of seven kinds of fusel oil found in chestnut-added yakju. Ethanol content increased to (v/v) after 8 days of fermentation. The content of lactic acid was the highest of all organic acids in the chestnut-added yakju. Sensory test results on chestnut-added yakju prepared with saccharifed corn flour showed that if rice flour is used as a sugar supplement for chestnut, the yakju prepared using koji had better flavor and taste. If cornflour was used in the preparation of chestnut-added yakju, the used of saccharified cornflour offered superior flavor and taste.

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