Analysis of Volatile Compounds, Produced in a Glucose Solution Fermented by Saccharomyces bayanus, during Fermentation and Conservation of Fermented Solution 1. Neutral Fraction

Saccharomyces bayanus에 의한 Glucose 용액의 발효중 생성된 휘발성 성분과 저장중 이 성분들의 분석 1. 중성분획

  • 정숙현 (동서공과대학교 식품공학과)
  • Published : 1995.12.01

Abstract

Twenty esters, 14 alcohols, 5 aldehydes, 5 ketones, 5 lactones, 2 S-containing compounds and 1 hydrocarbon are identified by GC-MS from volatile compounds in a glucose solution containing Yeat-Carbon-Base medium fermented for 64 hrs by Saccharomyces bayanus at pH 3.5, $25^{\circ}C$, 400rpm and 35L/h of aeration for 24hrs. Under the different conditions of conservation(1~4), ethyl 2-hydroxy-4-metjhylpentanoate, ethyl succinate, nonanol and phenylacetaldehyde are produced during conservation of fermented solution. 17 esters increased during conservation at $13^{\circ}C$ for 12 weeks and the increase of ethyl 9-hexadecenoate is important among 13 esters increased during conservation at $35^{\circ}C$ for 24hrs. During conservation, aldehydes increased at $35^{\circ}C$, but decreased at $13^{\circ}C$ and the great increase of isobutanal, benzaldehyde and phenylacetaldehyde is observed at $35^{\circ}C$. Alcoho and lactones increased but ketones decreased during conservation.

Yeast-Carbon-Base배지로 조성된 glucose용액을 Saccharomyces bananus로 pH 3.5 $25^{\circ}C$, 400rpm, 그리고 발효 초기 24시간 동안만 35L/h로 통기시키면서 64시간만에 alcohol 발효를 완료시켜, 발효 중 생성된 휘발성 성분과 이들 발효액을 여러 조건에서 숙성($25^{\circ}C$에서 6주, $13^{\circ}C$에서 12주, $35^{\circ}C$에서 24시간)시켰을 때 휘발성 성분의 변화를 GC-MS로 분석하였다. 20개의 ester, 14개의 alcohol, 5개의 aldehyde, 5개의 ketone, 5개의 lactone, 2개의 함황성분과 1개의 hydrocarbon이 발효중 생성되었다. Ethyl 2-hydroxy-4-methyl pentanoate, ethyl succinate, nonanol과 phenylacetaldehyde 등이 발효액의 저장 중 새로이 생성되었다. Ester는 일반적으로 저장 중 증가되었고, $13^{\circ}C$에서 12주간 저장된 시료에서 가장 크게 증가되어 본 실험에서 분석된 22개의 ester 중 17개가 증가하였다. $35^{\circ}C$에서 24시간 저장된 시료에서는 13개의 증가된 ester 중 ethyl 9-hexadecenoate의 증가가 가장 현저하였다. Aldehyde는 $35^{\circ}C$ 저장에서 크게 증가 되었으나 $13^{\circ}C$ 저장에서는 감소되었다. Isobutanal, benzaldehyde와 phenylaceraldehyde는 $35^{\circ}C$ 저장에서 현저하게 증가하였다. Alcohol과 lactone은 저장 중 감소되고 ketone은 증가되었다.

Keywords

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