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감마선 조사가 오미자의 생리 활성과 색상 변화에 미치는 영향

Effects of Gamma-Irradiation on Biological Activities and Color Changes of Extracts of Schizandrae fructus

  • 전태욱 (한국원자력연구소 방사선식품생명공학기술개발팀) ;
  • 박지혜 (한국원자력연구소 방사선식품생명공학기술개발팀) ;
  • 신명곤 (우송대학교 식품생명공학부) ;
  • 김기혁 (우송대학교 식품생명공학부) ;
  • 변명우 (한국원자력연구소 방사선식품생명공학기술개발팀)
  • 발행 : 2003.02.01

초록

오미자 추출물을 감마선 조사하여 색택 개선, 항산화성, 항균성에 대하여 실험하였다. 오미자의 추출 방법은 열수추출, ethanol, methanol 그리고 acetone으로 추출하였으며, 감마선 조사는 10, 20 그리고 30 kGy로 하였다. 감마선 조사 선량이 증가할수록 명도(Hunter color L-value)의 경우 비조사구보다 조사구가 월등히 밝은 색을 보였으며, 적색도(a값)와 황색도(b값)는 감소하는 결과를 보여줬다. TBA가 분석 결과는 ethanol로 추출한 경우 가장 높은 항산화력을 확인하였다. 전자 공여능의 측정 결과는 열수 추출한 경우에 비조사구와 조사구 모두 가장 활성이 높았으며 ethanol과 methanol의 경우에는 비조사구와 비슷한 활성을 보여줬다. 오미자 추출 용매별 및 감마선 조사 선량에 따른 항균효과는 B. subtilis, B. natto, B. megaterium, S. aureus, Sal, typhymurium과 E. coli 등 모든 균주에 대해 아주 높은 항균 활성을 나타내었다. 또한 오미자 추출물은 30 kGy까지 감마선을 조사하여도 추출물의 생리 활성에는 영향을 미치지 않았다 따라서 감마선 조사 기술은 천연 식품 보존제 및 화장품 원료로서 사용하기 위한 오미자 추출물의 색택 개선에 활용 가능성이 높을 것으로 기대된다.

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