Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Changes in Physicochemical Characteristics of Bokbunja (Rubus coreanus Miq.) Wine during Fermentation

복분자주 발효과정 중 이화학적 특성의 변화

  • Choi, Han-Seok (Department of Food Science and Technology, Chonbuk National University) ;
  • Kim, Myung-Kon (Department of Industrial Crop Production and Processing, Iksan National College) ;
  • Park, Hyo-Suk (Department of Agricultural Chemistry, Wonkwang University) ;
  • Shin, Dong-Hwa (Department of Food Science and Technology, Chonbuk National University)
  • Published : 2005.08.31
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Abstract

Effects of different yeast strains on physicochemical characteristics of Bokbunja (Rubus coreanus Miq.) fruits alcohol fermentation were investigated. Bokbusnja fruit must was inoculated with Saccharomyces cerevisiae KCCM 12224 (Sc-24), wild-type Bokbunja yeast (Bok-3), Saccharomyces coreanus (Yak-7), and Sc-24+Yak-7. Ethanol contents of Sc-24, Bok-3, Yak-7, and Sc-24+Yak-7 were 11.08, 10.62, 10.18, and 10.26%, respectively after 10 days fermentation. Addition of pectinase (500 ppm) increased ethanol content by 0.1-1.5%. Organic acids of Bokbunja wine were citric, malic, shikimic, formic, and oxalic acids. Citric and malic acid contents remarkably decreased, whereas that of acid increased by fermentation. Total acidity of Bokbunja wine was dependent on citric acid content. Sc-24, Yak-7, and Bok-3+ pectinase were more efficient for improvement of wine-color, although color values of Bokbunja wine significantly decreased during early stage of fermentation. Sc-24 and Bok-3+500 ppm of pectinase, and 8-10 days of fermentation could enhance quality of Bokbunja wine.

복분자 발효주의 품질향상을 위하여 효모 종류 및 효소 등 처리방법을 달리하여 발효과정 중의 이화학적 특성을 검토한 결과 Saccharomyces cerevisiae KCCM 12224(Sc-24), 복분자 분리효모(Bok-3), 약주분리(Yak-7), Saccharomyces cerevisiae(Sc-24)와 약주효모(Yak-7) 혼합균주의 주발효 후 알코올 함량은 각각 11.08%, 10.62%, 10.18%, 10.26%이었으며, pectinase 첨가시 알코올 함량을 0.1-1.5% 증가시킬 수 있었다. 발효주의 유기산은 oxalic, citric, malic, shikimic, formic acid 등이었으며, 발효과정 중 citric acid와 malic acid가 큰 폭으로 감소되었다. 복분자주 발효 중 적정산도는 발효액 중의 citric acid의 함량변화에 의존적이었다. 복분자주의 색도는 발효초기에 유의적으로 감소되었으며 Sc-24, Yak-7 및 Bok-3+pectinase 처리구가 발효에 의한 색도의 변화가 비교적 낮았다. 이화학적 성분의 변화를 고려할 때 복분자주의 발효는 8-10일이 적당하였으며, Sc-24 및 Bok-3균주와 500ppm의 pectinase 첨가가 발효에 효과적이었다.

Keywords

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