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Antioxidative ability of ethanol extract from the leaves of Leucaena leucocephala (Lam.) de Wit

백연수(Leucaena leucocephala (Lam.) de Wit) 잎 에탄올 추출물의 항산화능

  • Kim, Dong Chung (Department of Integrated Materials Engineering, Chungwoon University) ;
  • In, Man-Jin (Department of Human Nutrition and Food Science, Chungwoon University)
  • Received : 2017.05.25
  • Accepted : 2017.06.20
  • Published : 2017.06.30

Abstract

Antioxidative ability of 50% ethanol extract from leaves of Leucaena leucocephala (Lam.) de Wit was investigated. The extraction yield, total polyphenols and total flavonoids of the ethanol extract were $18.3{\pm}0.40%$, $121.3{\pm}11.04{\mu}g$ gallic acid equivalents/mg and $105.2{\pm}2.77{\mu}g$ quercetin equivalents/mg, respectively. The ethanol extract possessed the antioxidative activities such as free radical, cation radical, and nitrite scavenging activities as well as reducing power and lipid peroxidation inhibitory activity. These antioxidative activities of the ethanol extract increased in proportion to the extract concentration. $EC_{50}$ values for free radical scavenging, cation radical scavenging nitrite scavenging, and reducing power were $133.51{\mu}g/mL$, $667.22{\mu}g/mL$, 2.58 mg/mL, and $250.00{\mu}g/mL$, respectively. Polyphenols and flavonoids are suggested to be the key contributors for the antioxidative ability of the ethanol extract from Leucaena leucocephala leaves.

백연수 잎으로부터 얻어진 50% 에탄올 추출물의 항산화능을 조사하였다. 백연수 잎 추출물의 수율은 $18.3{\pm}0.40%$, 총 폴리페놀 함량은 $121.3{\pm}11.04{\mu}g$ gallic acid equivalents/mg, 총 플라보노이드 함량은 $105.2{\pm}2.77{\mu}g$ quercetin equivalents/mg으로 나타났다. 백연수 잎 추출물은 유리라디칼 소거활성, 양이온라디칼 소거활성, 아질산염 소거활성, 환원력 및 지질과산화 억제 활성의 항산화능을 가지고 있었다. 백연수 잎 추출물의 모든 항산화 활성은 추출물의 농도에 비례하여 증가하였으며, 유리라디칼 소거활성, 양이온라디칼 소거활성, 아질산염 소거활성 및 환원력의 $EC_{50}$은 각각 133.51, 667.22, 2.58 및 $250.00{\mu}g/mL$이었다. 백연수 잎의 우수한 항산화 활성은 높은 폴리페놀과 플라보노이드 함량에 기인한 것으로 여겨진다.

Keywords

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