Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Comparison of antioxidant activities of sea buckthorn (Hippophae rhamnoides) leaf extracts at different ethanol ratios

비타민나무(Sea Buckthorn, Hippophae rhamnoides) 잎 에탄올 농도별 추출물의 항산화활성 비교

  • Park, Min Gyu (Department of Food Science and Nutrition, Daejin University) ;
  • Joo, Shin Youn (Department of Food Science and Nutrition, Daejin University)
  • 박민규 (대진대학교 식품영양학과) ;
  • 주신윤 (대진대학교 식품영양학과)
  • Received : 2020.12.18
  • Accepted : 2021.01.26
  • Published : 2021.02.28
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Abstract

This study was conducted to investigate the potential of sea buckthorn leaf (SBL) as a natural antioxidant. SBL was extracted using different ethanol ratios (0, 40, 80, and 100%), and the resulting extracts were examined for their antioxidant contents and antioxidant activities using various methods. The 40% and 80% ethanol extracts (EEs) showed higher total polyphenol contents of 285.06 and 285.64 mg GAE/g respectively, than those in other solvents, and as the ethanol concentration increased, other antioxidant contents of the extracts increased. The 40% and 80% EEs recorded the highest radical scavenging activities against DPPH, superoxide-, ABTS+, nitrite scavenging activity (NO-), and reducing power (RP). The NO- and RP of the SBL EEs were higher than those of ascorbic acid or tannin, which are known as representative antioxidants. The results of this study, suggest that SBL is a potential source of natural antioxidants.

본 연구에서는 에탄올 농도를 달리한 비타민나무 잎 추출물의 항산화 물질 및 항산화 활성을 측정하였다. 에탄올 농도별 비타민나무 잎 추출물의 총 페놀 함량은 40% 에탄올 추출물과 80% 에탄올 추출물이 각각 285.06, 285.64 mg GAE/g으로 높은 함량을 보였으며, 총 플라보노이드, 총 비타민 C, 클로로필 a, 클로로필 b, 총 클로로필 함량은 각각 100% 에탄올 추출물이 123.78 mg NE/g, 807.11 mg/100 g, 30.65, 49.20, 77.58 g/mL로 높은 함량을 보였다. 항산화 활성은 40% 에탄올 추출물과 80% 에탄올 추출물이 DPPH 라디칼 소거능(IC50 49.18, 49.03 ㎍/mL), ABTS+ 라디칼 소거능(IC50 67.52, 65.71 ㎍/mL), 아질산염 소거능(IC50 5.15, 4.24 ㎍/mL) 및 환원력(0.90-2.60, 0.97-2.73 O.D.)에서 가장 활성이 좋았고 superoxide- 라디칼 소거능은 40% 에탄올 추출물이 IC50 60.80 ㎍/mL로 활성이 좋았다. 또한 아질산염 소거능과 ABTS+ radical 소거능의 경우 비교군보다 활성이 좋거나 비슷하여 비타민나무 잎의 천연 항산화 물질로의 활용 가능성을 확인하였다. 항산화 물질과 항산화 활성 간의 상관관계를 분석한 결과 상관계수가 0.715-0.990으로 양의 상관관계를 나타냈다. 따라서 비타민나무 잎 추출물 제조 시 40% 에탄올 및 80% 에탄올 용매를 사용할 경우 높은 항산화 활성을 나타내어 천연 항산화제로 활용 가능성이 높을 것으로 사료된다.

Keywords

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