Quality Characteristics of Fermented Alcoholic Beverage with Astragali Radix Added

황기를 첨가한 발효주의 품질 특성

  • Choi, Ji-Ho (Fermentation & Food Processing Division, NAAS, RDA) ;
  • Park, Ji-Hye (Fermentation & Food Processing Division, NAAS, RDA) ;
  • Kim, So-Ra (Fermentation & Food Processing Division, NAAS, RDA) ;
  • Lee, Choong-Hwan (Dept. of Bioscience and Biotechnology and Bio/Molecular Informatics Center, Konkuk University) ;
  • Park, Shin-Young (Fermentation & Food Processing Division, NAAS, RDA) ;
  • Kim, Tack-Joong (Division of Biological Science and Technology, College of Science and Technology, Yonsei University) ;
  • Jeong, Seok-Tae (Fermentation & Food Processing Division, NAAS, RDA) ;
  • Choi, Han-Seok (Fermentation & Food Processing Division, NAAS, RDA) ;
  • Yeo, Soo-Hwan (Fermentation & Food Processing Division, NAAS, RDA)
  • 최지호 (농촌진흥청 국립농업과학원 농식품자원부 발효이용과) ;
  • 박지혜 (농촌진흥청 국립농업과학원 농식품자원부 발효이용과) ;
  • 김소라 (농촌진흥청 국립농업과학원 농식품자원부 발효이용과) ;
  • 이충환 (건국대학교 생명공학과) ;
  • 박신영 (농촌진흥청 국립농업과학원 농식품자원부 발효이용과) ;
  • 김택중 (연세대학교 생명과학기술부) ;
  • 정석태 (농촌진흥청 국립농업과학원 농식품자원부 발효이용과) ;
  • 최한석 (농촌진흥청 국립농업과학원 농식품자원부 발효이용과) ;
  • 여수환 (농촌진흥청 국립농업과학원 농식품자원부 발효이용과)
  • Received : 2011.10.26
  • Accepted : 2012.02.25
  • Published : 2012.02.29

Abstract

We produced Hwanggiju (added 0.5~2.0% of ground Astragali Radix compared to starch contents) and investigated the physicochemical characteristics, DPPH free radical scavenging activities, polyphenol contents, and sensory evaluation. For all treatments, the initial pH was 3.9~4.1 and gradually decreased for 6 days from the 1st mashing day, and then rapidly increased to 4.67. As the fermentation proceeded, total acid contents increased in most of the treatments, reduced temporarily after the 2nd mashing time because of the addition of starch material and water, and then slightly rose again. There were little changes in pH and total acid contents followed by adding ground Astragali Radix (AR) to the fermentation periods. Amino acidities of all treatments showed patterns of which consistently rose as the fermentation proceeded and slightly reduced followed by increasing the addition rate of ground AR to the mashes. Soluble solid and alcohol contents also increased continuously and there were few differences among the treatments followed by adding to the ground AR rate. In color, there was no differences in L value, but a and b value showed significant differences by adding ground AR rate. In DPPH free radical scavenging activities, the control (no AR added) showed 53.6% and when grinded AR added, there were improving effects of the activities (0.52~6.9%). In polyphenol contents, the control was 1.05 mg/mL and the ground AR added treatments increased slightly. In the sensory evaluation, the control received a relatively high score ($5.0{\pm}1.0$), and the treatments which added 0.5% ground AR during the 2nd mashing time were also well received ($4.5{\pm}1.3$).

황기뿌리 분쇄물을 전분질 원료대비 0.5~2.0% 첨가한 발효주를 제조하여 이화학적 특성, DPPH free radical 소거능, 폴리페놀 함량, 기호도평가를 실시하였다. 술덧 발효 초기의 pH는 3.9~4.1 였으며, 모든 처리구에서 발효 시작 6일차까지 낮아지는 경향을 보이다가 발효 종료 시점에서 4.67 까지 상승하였다. 총산의 경우 모든 처리구에서 발효가 진행됨에 따라 증가한 후 2차담금시 전분질 원료와 물의 첨가로 감소하였다가 다시 소폭 상승하는 양상을 보였다. 술덧 발효 중 황기 첨가량 및 첨가시기에 따른 pH 변화와 총산함량의 차이는 미미하였다. 아미노산도는 황기 첨가량이 증가할수록 소폭 감소하는 경향을 나타냈으며, 모든 처리구에서 발효가 진행됨에 따라 지속적으로 상승하는 양상을 보였다. 가용성 고형분과 알코올 함량은 지속적으로 증가하였으며, 황기 첨가에 따른 처리구간의 차이는 미미하였다. 색도에 있어서, L값은 첨가량과 첨가 시기에 따라 유의적인 차이가 없었으나, a값과 b값은 유의적인 차이를 보였다. DPPH free radical 소거능에 있어서 황기가 첨가되지 않은 대조구는 53.6%의 활성을 보였으며, 황기 첨가시 0.52~6.9%의 향상효과가 있는 것으로 판단되었다. 폴리페놀류는 대조구에서 1.05 mg/mL 함량을 보였으며, 미미하지만 황기 첨가시 폴리페놀함량이 증가되는 것으로 나타났다. 관능평가에서는 황기 무첨가구에서 비교적 높은 평가점수를 받았으며($5.0{\pm}1.0$), 0.5% B 처리구 또한 좋은 반응을 얻었다($4.5{\pm}1.3$).

Keywords

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