Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Manufacturing and Characteristics of Korean Traditional Liquor, Hahyangju Prepared by Saccharomyces cerevisiae HA3 Isolated from Traditional Nuruk

전통 누룩으로부터 분리된 Saccharomyces cerevisiae HA3을 이용한 하향주의 제조 및 특성

  • 정희경 (대구신기술사업단 전통생물소재산업화센터) ;
  • 박치덕 (대구신기술사업단 전통생물소재산업화센터) ;
  • 박환희 (비슬산하향주) ;
  • 이기동 (대구신기술사업단 전통생물소재산업화센터) ;
  • 이인선 (대구신기술사업단 전통생물소재산업화센터) ;
  • 홍주헌 (대구신기술사업단 전통생물소재산업화센터)
  • Published : 2006.10.01
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Abstract

In order to standardize the manufacturing processes of Hahyangju, a traditional Korean liquor, 29 yeast strains were isolated from traditional Nuruk. Strain N8 exhibited a particularly strong resistance to sugar. Strains HA2, HA3 and HA4 grew successfully in medium containing 10% ethanol. In comparison with the growth exhibited by these strains when grown in a yeast malt extract medium, the ethanol production rates for the three strains were 10.8%, 10.45%, and 10%, respectively in a yeast malt extract medium containing 25% glucose. Based on these results, HA3 was the strain selected for use in the manufacturing processes of Hahyangju and it was identified as a Saccharomyces cerevisiae strain with 97% ITS sequence similarity. The use of Saccharomyces cerevisiae HA3 causcd a decrease in the lactic acid content, acidity and growth of lactic acid bacteria in the fermentation mash. Following thc addition of Saccharomyces cerevisiae HA3 to the manufacturing process of Hahyangju, the second fermentation mash showed a 22% increase in the alcohol production rate associated with traditional fermentation; however, the amino acidity, pH and reducing sugar content showed little change. Sensory evaluation of Hahyangju fermented with S. cerevisiae HA3 also showed better scores than Hahyangju mashed by the traditional method.

대구 무형문화재인 하향주 생산의 표준화를 위하여 전통 누룩으로부터 29균주의 효모를 분리하다. 이들을 대상으로 산 생성능을 측정한 결과, 분리된 효모들은 산 생성능이 비교적 양호 하였고 분리된 효모들을 50% glucose가 첨가된 YM broth에서도 생육이 우수하였다. 10% 에탄올 농도에서도 내성을 나타내는 HA2 HA3, HA4 균주를 대상으로 주정계를 이용하여 에탄올 생성능을 측정한 결과, 각각 10.8%, 10.45%, 10%로 단 시간에 고농도의 에탄올을 생산하였다. 분리된 효모 중 내당성, 산생성능, 에탄올 생성능, 에탄올 내성이 우수한 효모 HA3을 하향주 주조를 위한 산업적 이용 균주로 최종 선발하였고 ITS 영역 증폭을 통하여 동정한 결과, HA3은 Saccharomyces cerevisiae와 97% 상동성을 나타내어 Saccharomyces cerevisiae HA3로 명명하였다. 선발된 효모인 Saccharomyces cerevisiae HA3를 주모로 첨가하여 하향주를 제조하여 전통적 방법으로 제조되는 하향주 발효와 비교한 결과, 환원당의 함량, 아미노산함량 pH 변화는 큰 차이가 없었으나 주모 첨가는 밑술 발효시 효모의 생육이 빠르게 유도되어 상대적으로 젖산균의 증식이 억제시킴으로써 유기산 중 lactic acid의 함량 및 높은 산도를 낮출 수 있었으며, 22%로 높은 알콜 발효력을 보였다. 또한 주모를 첨가하여 제조한 하향주는 관능적 기호도 평가에서 전반적 기호도가 전통적 제조법으로 주조한 하향주 보다 우수함을 확인하였다.

Keywords

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