Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Characterization of acetic acid fermentation of detoxified Rhus verniciflua vinegar produced by various yeast strains

효모 종류에 따른 무독화 옻식초의 초산발효 특성

  • Kim, Ji-Seon (Department of Agro-food Resource, National Institute of Agricultural Science, RDA) ;
  • Yeo, Soo-Hwan (Department of Agro-food Resource, National Institute of Agricultural Science, RDA) ;
  • Mun, Ji-Young (Department of Agro-food Resource, National Institute of Agricultural Science, RDA) ;
  • Baek, Seong Yeol (Department of Agro-food Resource, National Institute of Agricultural Science, RDA)
  • 김지선 (국립농업과학원 농식품자원부) ;
  • 여수환 (국립농업과학원 농식품자원부) ;
  • 문지영 (국립농업과학원 농식품자원부) ;
  • 백성열 (국립농업과학원 농식품자원부)
  • Received : 2016.10.10
  • Accepted : 2016.10.27
  • Published : 2016.12.30
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Abstract

This study was conducted to investigate and compare the characteristics of acetic acid fermentation in detoxified Rhus verniciflua vinegar (DRV) produced by different yeast strains. The DRVs were prepared by static acetic acid fermentation using six different yeast strains (Saccharomyces cerevisiae Fermivin, Pichia kudriavzerii N77-4, Hanseniaspora pountiae HP1-2, Candida tropicalis Y447, Wickerhamomyces anomalus N43-8, and Pichia kluyveri Frootzen). Alcohol content of the S. cerevisiae Fermivin fermented DRV was highest 16.07%. Among the yeast strain DRVs, there were significant differences in alcohol content, but all alcohol levels were 11%. Moreover, there were differences in pH and titratable acidity of the DRVs. The organic acid content of the DRVs ranged from 35.88 to 55.49 mg/mL and there were significant differences among the yeast strain DRVs. Essential free amino acids, particularly glutamic acid, alanine, leucine and valine, were detected in each of the 6 DRVs. Electronic nose analysis revealed that three different volatile chemical patterns were present in the 6 DRVs. The results indicate that yeast strains with different characteristics can produce vinegars with different characteristics.

본 연구는 무독화 옻 추출물을 첨가하여 효모 종류별로 제조한 옻식초의 품질 특성을 비교하였다. Saccharomyces cerevisiae Fermivin과 non-Saccharomyces 속인 Pichia, Hanseniaspora 속 등 6종의 효모를 이용하여 알코올 발효시킨 결과, Fermivin이 알코올 함량이 가장 높았으며, Wickerhamomyces와 Pichia에서도 11.2, 12.2%의 알코올 함량을 나타내었다. 알코올 발효액에 초산균 A. pasteurianus KACC16934를 접종하여 초산발효 시킨 결과 pH와 적정 산도는 효모에 따른 차이가 있었다. W. anomalus N43-8을 제외한 모든 옻식초에서 발효 10일 후 pH 3.0 이하로 나타났으며, 적정산도도 W. anomalus N43-8로 발효한 식초가 5.17%로 가장 낮게 나타났고 C. tropicalis Y447로 발효한 식초는 6.66%로 가장 높은 산도를 보였다. 옻식초의 주요 유기산으로 acetic acid가 검출되었으며 W. anomalus N43-8 식초의 유기산은 35.88 mg/mL로 가장 낮았고 C. tropicalis Y447 식초는 55.49 mg/mL로 높은 함량을 나타내었다. 유리 아미노산은 모든 시험구에서 valine, leucine 등의 필수아미노산 7종이 검출되었으며 glutamic acid, alanine이 주요 아미노산으로 확인되었다. 유리아미노산은 $1,314.89{\sim}2,411.65{\mu}g/mL$로 효모의 종류에 따라 차이가 나타났다. 옻식초의 향기 패턴 분석 결과 H. opuntiae HP1-2와 P. kluyveri Frootzen이 비슷한 패턴을 보였으며, S. cerevisiae Fermivin과 C. tropicalis Y447, P. kudriavzeri N77-4가 비슷한 패턴을 보였다. 두 그룹과 W. anomalus N43-8은 전자코 분석 결과 각각의 뚜렷한 향기 패턴을 보였다. 본 연구를 발효 특성이 다른 효모로 식초를 제조할 때, 각각의 효모에 따라 이화학적 특성에 차이가 나는 것으로 보여진다.

Keywords

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