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Changes in the Components of Acetic Acid Fermentation of Brown Rice Using Raw Starch Digesting Enzyme

생전분 분해효소를 이용한 현미의 초산발효조건에 따른 성분변화

  • 신진숙 (계명대학교 식품가공학과) ;
  • 정용진 (계명대학교 식품가공학과)
  • Published : 2003.04.01

Abstract

This study was performed to establish the fermentation method of non-steamed brown rice vinegar using starch saccharifing enzyme. During vinegar fermentation, initial pH had increased in the higher concentration of alcohol and acetic acid. Final pH was gradually changed to pH 2.90~3.44 from 3.44~4.06. The higher total acidity of brown rice vinegar resulted from the higher alcohol concentration. The total acidity was slightly dropped after gradually increasing from the starting of fermentation. Initial pH was decreased from 3.67 to 3.16. The total acidity was gradually increased from the first day of fermentation with 1.02, it was 1.54 on the second day after fermentation and there was a tendency to decreased after the highest values with 6.53 fermentation for 12 days. In organic acid composition, oxalic, malic, acetic, citric, and succinic acid were detected. The total free amino acid was decreased to 1,121 mg%. The major amino acids were ${\gamma}$ -aminobutyric acid, $\alpha$-aminoadipic acid and alanine, and ${\gamma}$-aminobutyric acid was the highest (539 mg%). The mineral contents such as P and K was high in sample and followed by Mg, Na, Ca.

본 연구에서는 생 전분 분해효소를 이 용한 비 열처리 현미식초 제조방법 확립과 초산발효 중 성분변화를 조사하였다. 초기 알콜농도별, 초기 산도별로 각각 실험한 결과 pH는 초기 알콜농도별 실험치와 초기 산도별 실험치 모두 발효 초기 3.44~4.06에서 발효가 진행됨에 따라 점점 감소하여 총산이 가장 높은 수치를 나타낸 시점에서 각각 2.90~3.44로 가장 낮은 수치를 나타낸 후 증가하는 경향이었다. 총산은 알콜농도가 높을수록 총산함량도 각각 4.23, 5.46, 5.79, 6.50 및 7.18로 점점 높게 나타났으며, 초기 산도별 실험에서는 모두 발효 1일째부터 서서히 증가하여 각각 4.78, 5.88, 5.79및 5.21로 최고치를 나타낸 후 감소하는 경향이었다. 초산 수율은 알콜농도 5%와 6%에서 60%이상으로 높게 나타났으며, 초기 산도 1.0에서 62%로 가장 높게 나타났다. 또한 초산발효과정 중 성분변화를 조사한 결과 pH는 발효초기 3.67에서 발효가 진행됨에 따라 점점 감소하여 3.16으로 나타났으며, 총산은 발효초기 1.02로 발효 1일째부터 총산이 서서히 증가하여 발효 2일에 1.54, 발효 12일에 5.53으로 가장 높은 수치를 나타낸 후 감소하는 경향이었다. 유기산 조성은 oxalic, malic, acetic, citric 및 succinic acid가 검출되었으며, 유기산 중 acetic acid가 가장 높은 함량으로 나타났다. 유리 아미노산은 1,121.09mg%이었으며, ${\gamma}$-aminobutyric acid, $\alpha$-aminoadipic acid, alanine이 주된 아미노산으로 나타났으며, 특히 ${\gamma}$-aminobutyric acid는 539.05 mg%로 아미노산중에서 가장 높은 함량으로 나타났다. 무기질함량은 P와 K함량이 유사하게 높은 함량으로 나타났으며, 다음으로 Mg, Na, Ca순으로 나타났다.

Keywords

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