The Quality Characteristics of Fermented and Soaked Jujube Wine

발효 및 침출 대추주의 품질 특성

  • Kim, Soon-Jin (Dept. of Food Science and Technology, Seoul Women's University) ;
  • Chun, Myoung-Sook (Dept. of Food and Nutritional Sciences, Hanbuk University)
  • 김순진 (서울여자대학교 식품공학과) ;
  • 전명숙 (한북대학교 식품영양학과)
  • Received : 2010.06.21
  • Accepted : 2010.07.23
  • Published : 2010.09.30

Abstract

The chemical composition characteristics of jujube wine using different preparation methods including extraction in -soju (25%) and fermentation were investigated. The jujube wine was prepared by soaking in soju using- whole fruit(WJ-S1) or seed-removed fruit(WJ-S2). Fermentations of the jujube wine were started by using whole fruit(WJ-F1), seed-removed fruit(WJ-F2) or extracts of whole fruit(WJ-F3) after adding 24% sucrose. The pH of all samples decreased from a range of 4.92~5.42 at the start time to 3.66~4.97 after 100 days. The treatment WJ-F3 showed the lowest pH among all treatments. Total acid content was 0.67~1.01% at the initial stage and then changed to 0.51~0.88% after 100 days. Total sugar and reducing sugar contents were 1.20~13.8% and 0.50~4.45% at initial stage and then changed to 1.53~4.52% and 1.75~3.82% after 100 days respectively. These sugars decreased during the preparation and fermentation of the jujube wine. The amounts of free sugars including fructose, glucose, and sucrose ranged from 1.53~4.52% and treatment WJ-F3 showed the highest amount(1.95~13.64%) compared the other treatment. Glucose level were high in treatment WJ-S1 and WJ-S2, and fructose was increased in treatments WJ-F1, WJ-F2, and WJ-F3 after 60 days. Amino nitrogen content was 0.02~0.11% after 20 days and 0.07~0.14% after 40 days respectively. Solid content was 2.68~7.76% at the initial fermentation stage and changed to 4.81~9.73% after 100 days. Hunter color(L values) were 88.45~96.74 at the initial stage and then changed to 92.62~100.45 after 100 days. Preference tests a significant difference between the two types (extraction and fermentation) of jujube wine. And treatment WJ-S2 received the highest preference scores among the all treatments.

통대추, 대추과육, 대추과즙에 소주와 효모를 사용하여 만든 대추 침출주와 대추 발효주의 제조 과정 중 성분과 품질을 비교한 결과는 다음과 같다. pH는 담금일에 4.93~5.42였으나, 제조 100일에는 3.66~4.97의 범위로 저하되었고, 시험구 중 발효주의 과즙구(WJ-F3)에서 3.66으로 가장 낮았다. 총 산은 담금 직후 0.67~1.01% 이었으나, 제조 100일에는 0.51~0.88%로 다소 저하되었으며, 발효주의 통대추구(WJ-F1)에서 총 산 함량이 타 시험구보다 높았다. 총 당과 환원당은 담금 일에 1.20~13.8%, 0.50~4.45% 이었고, 제조 100일에 총 당 1.53~4.52%, 환원당 1.75~3.82%로 제조 과정 중 저하되었으며 이들 당은 침출주의 통대추구가 높았다. 유리 당은 fructose, glucose, sucrose가 확인 되었다. 유리 당의 총량은 1.32~13.64% 이었고, 발효주의 과즙구(WJ-F3)에서 1.95~13.64%로 타 시험구보다 높았다. 대추주의 유리 당 중 glucose는 침출주에서, fructose는 60일 이후의 발효주에서 각각 높았다. 아미노태 질소는 담금 일에 검출되지 않았으나 제조 20일에 0.02~0.11%이었으며 제조 40일에 0.07~0.14%로 최대치를 보였다. 고형 분 함량은 담금 일에 2.68~7.76% 이었으나 제조 40일에 12.24~19.40%로 증가 되었고 이후 대체로 감소되어 제조 100일에 4.81~9.73%로 나타났다. 대추주의 색도 중 밝기(L 값)는 담금 일에 88.45~96.74이었으나 제조 40일까지는 다소 저하되었으며 제조 100일에는 92.62~100.45로 시험구에 따라서 약간 증가하였고 침출주의 과즙구에서 밝기가 가장 높았다. 적색도는 발효주의 과즙구만 양의 수치인 적색으로 측정되었고 이외의 시험구는 음의 수치인 녹색으로 나타났다. 황색도는 제조 20일과 40일에 강하였고 80일 이후는 퇴색으로 무색 또는 청색에 유사하였다. 발효주의 과즙구는 타 시험구보다 황색도가 높았다. 대추주의 전체적인 선호도는 침출주와 발효주간에 유의적 차이를 보였다.

Keywords

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