Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Development of Extracts of Lycii folium Having High Antioxidant Activity

항산화 활성이 높은 구기엽 추출물 제조

  • Kim, Tae-Su (Dept. of Food Science & Nutrition, Hoseo University) ;
  • Park, Won-Jeong (Dept. of Food Science & Technology, Kongju National University) ;
  • Ko, Sang-Beom (Safety Assesment Center, Korea Testing and Research Institute for Chemical Industry) ;
  • Kang, Myung-Hwa (Dept. of Food Science & Nutrition, Hoseo University)
  • 김태수 (호서대학교 식품영양학과) ;
  • 박원종 (공주대학교 식품공학과) ;
  • 고상범 (한국화학시험연구원 안전성 평가본부) ;
  • 강명화 (호서대학교 식품영양학과)
  • Published : 2008.10.31
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Abstract

The aim of this study was to analyze the antioxidant properties of Lycii folium extracts prepared from different solvents. Lycii folium were extracted with water, 80% ethanol (80% EtOH), 80% methanol (80% MeOH) and 100% methanol (100% MeOH) in water bath at $40^{\circ}C$. The antioxidant activity of the extracts was evaluated using DPPH, hydroxyl and hydrogen radical scavenging activities, and SOD-liked activity. Total phenolic acid contents were 1.085 mg/mL in 100% MeOH, 1.382 mg/mL in 80% EtOH, 1.420 mg/mL in 80% MeOH and 1.084 mg/mL in water. DPPH radical scavenging activity of the extracts were 65.60% in 80% EtOH, 56.80% in 80% MeOH, 83.85% in 100% MeOH and 54.65% in water. Hydroxyl radical scavenging activities were 66.65% in 100% MeOH, 73.13% in 80% ethanol, 73.58% in 80% MeOH and 70.73% in water. Hydrogen radical scavenging activity of the extracts prepared from Lycii folium were 11.70% in 100% MeOH, 33.73% in 80% EtOH, 35.40% in 80% M eOH and 23.86% in water. SOD-liked activity of the extracts prepared from Lycii folium was 71.58% in 100% MeOH, 74.29% in 80% EtOH, 88.46% in 80% MeOH and 67.47% in water. Our result showed that Lycii folium extracts prepared from 80% methanol were found to be promising biomaterials with antioxidant effects.

본 연구는 구기엽(Lycium chinesis Miller Lycii folium)의 항산화 활성이 높은 최적추출 용매를 설정하고자 100% MeOH, 80% MeOH, 80% EtOH 및 water로 혼합 용매를 제조하여 구기엽 추출물을 제조하였다. 각 추출물의 총 페놀 화합물은 80% MeOH 1.420 mg/mL> 80% EtOH 1.382 mg/mL> 100% MeOH 1.085 mg/mL> water 1.084 mg/mL 순으로 나타났고, 전자공여능 및 SOD 유사활성에서도 80% MeOH 추출물에서 83.85%, 88.46%로 가장 높은 활성을 나타내었으며, water 추출물에서 54.65%, 67.47%로 가장 낮은 활성을 나타내었다. Hydroxyl radical 소거능에서는 80% MeOH 추출물에서 73.58%로 가장 높았고, 100% MeOH 추출물에서 66.65%로 가장 낮은 활성이었다. Hydrogen radical 소거능 또한 80% MeOH에서 35.40%로 가장 높은 활성을 보였고, 100% MeOH 추출물에서 11.70%로 가장 낮은 활성을 나타내었다. 본 실험 결과 아직 초기 단계에 불과하지만 구기엽의 항산화 활성 검토에서 80% MeOH 추출물에서 가장 높은 활성을 보여 구기엽 추출물의 기능성 소재로 개발 가능성이 시사되었다.

Keywords

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