Studies on the Changes in the Extraction of Phenolics and Color Characteristics by the Enzyme Treatment of Red Grape(Muscat Bailey A) Wine during Fermentation

적포도(Muscat Bailey A)주 발효 중 효소 처리에 의한 Phenol류 추출 및 색도 변화에 관한 연구

  • Lee, Jeung-Yun (School of Natural Food Science, College of Health Industry, Eulji University) ;
  • Chae, Soo-Kyu (School of Natural Food Science, College of Health Industry, Eulji University)
  • 이정윤 (을지대학교 보건산업대학 식품과학부) ;
  • 채수규 (을지대학교 보건산업대학 식품과학부)
  • Received : 2010.06.12
  • Accepted : 2010.06.30
  • Published : 2010.09.30

Abstract

This study was designed to test the effects of enzyme treatments on the extraction of total phenolic compounds and on color characteristics in wines from domestic MBA(Muscat Bailey A) grapes. The total phenolic compound content of the MBA grape wine was $1,352.8{\pm}37.8\;mg/{\ell}$ at 10 days of fermentation. Furthermore, MBA wines treated with 2%(v/v) of Pectinex and Viscozyme had 14.5%(p<0.05) and 3.8% increase, respectively, in total phenolic compound content by 10 days of fermentation. Pectinex treatment was more effective for phenolic levels than Viscozyme treatment. The L, a and b values of the MBA grape wine were 7.4, 9.2 and -1.2, respectively, by 10 days of fermentation. The values in case of Pectinex enzyme treatment were 7.0, 10.6 and -0.8, respectively, and these values were significantly different according to Pectinex treatment(p<0.05). But the values in case of Viscozyme enzyme treatment were 7.2, 9.8 and -1.1, respectively, and these values were not different according to Viscozyme treatment. The hue and color intensity values of the MBA grape wine were 0.492 and 0.785, respectively, by 10 days of fermentation. The values in case of Pectinex enzyme treatment were 0.460 and 0.881, respectively. And as a result of the Pectinex treatment, the hue value of wine was decreased and color intensity was increased slightly(p<0.05). But the values in case of Viscozyme enzyme treatment were 0.482 and 0.805, respectively, and these values were not different according to the Viscozyme treatment.

국내산 MBA(Muscat Bailey A) 포도의 효소 처리에 의한 발효 과정 중 총 페놀 추출량을 비롯하여 Hunter's L, a, b값, hue 및 color intensity 등의 색도 변화를 측정하여 비교 분석하였다. MBA 포도의 발효 10일째에 총 페놀 함량은 $1,352.8{\pm}37.8\;mg/{\ell}$이었으며, Pectinex와 Viscozyme의 효소 처리로 각각 14.5%(p<0.05) 및 3.8% 증가하여 Pectinex 처리가 Viscozyme 처리보다 페놀류 추출 효과가 있는 것으로 나타났다. MBA 포도의 발효 10일째 L, a, b값은 각각 7.4, 9.2, -1.2였으며, Pectinex 효소 처리의 경우는 7.0, 10.6, -0.8로 약간의 차이를 나타내었으나(p<0.05), Viscozyme 효소 처리의 경우는 7.2, 9.8, -1.1로 효소 처리에 따른 차이가 없었다. MBA 포도의 발효 10일째 hue 값과 color intensity는 각각 0.492와 0.785를 나타내었으며, Pectinex 효소 처리의 경우는 0.460과 0.881로 hue값은 다소 감소하였고 color intensity는 약간 증가하였으나(p<0.05), Viscozyme 효소 처리의 경우는 0.482와 0.805로 효소 처리에 따른 차이가 없었다.

Keywords

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