노간주나무 (Juniperus rigida Siebold et Zucearini) 잎의 추출성분 및 항산화 활성
The dried neeldes(1.5 kg) of Juniperus rigida were ground, extracted with acetone-H2O(7:3, v/v), concentrated, and fractionated with a series of hexane, CH2Cl2, EtOAc and water on a separatory funnel. Each fraction was freeze dried to give dark-brown powder and EtOAc and water soluble fractions were...
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Published in | 목재공학 Vol. 32; no. 1; pp. 59 - 66 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | Korean |
Published |
한국목재공학회
01.01.2004
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Subjects | |
Online Access | Get full text |
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Summary: | The dried neeldes(1.5 kg) of Juniperus rigida were ground, extracted with acetone-H2O(7:3, v/v), concentrated, and fractionated with a series of hexane, CH2Cl2, EtOAc and water on a separatory funnel. Each fraction was freeze dried to give dark-brown powder and EtOAc and water soluble fractions were chromatographed on a Sephadex LH-20 column using a series of aqueous methanol and ethanol-hexane mixture as eluent. Spectrometric analysis such as NMR and FAB or EI-MS including TLC were performed to characterize the structures of the isolated compounds. The needles of Juniperus rigida contained a large amount of (+)-catechin, quercetin-3-O-α-L-rhamnopyranoside and isoconiferin, in addition to a small amount of umbelliferone and quercetin-3-O-β-D-rutinoside. The antioxidative activities of each fraction and isolated compounds were tested by DPPH radical scavenging method, and EtOAc soluble fraction, (+)-catechin and quercetin-3-O-α-L-rhamnopyranoside were effective. 노간주나무 잎을 채취하여 건조시킨 후 분말로 제조하여 1.5 kg을 아세톤-물(7:3, v/v)로 추출하고 헥산, 메틸렌클로라이드, 에틸아세테이트 및 수용성으로 분획하여 동결 건조시켰다. 그 중에서 에틸아세테이트용성과 수용성 분획을 Sephadex LH-20으로 충진한 칼럼에서 메탄올과 에탄올-헥산 혼합액을 용리용매로 사용하여 칼럼크로마토그래피를 실시하였다. 단리된 화합물들은 TLC로 확인한 후 NMR스펙트럼을 사용하여 정확한 구조를 규명하였고 FAB 및 EI-MS로써 분자량을 측정하였다. 주로 많은 양의 (+)-catechin, quercetin-3-O-α-L-rhamnopyranoside와 isoconiferin이 분리되었으며, 소량의 umbelliferone과 quercetin-3-O- β-D-rutinoside도 분리되었다. 각 분획물들과 단리된 화합물들은 DPPH 라디칼 소거법을 이용하여 항산화실험을 실시하였으며, 분획물중에는 에틸아세테이트용성이 그리고 화합물중에는 (+)-catechin과 quercetin-3-O-α-L-rhamnopyranoside이 우수한 항산화 효능이 있는 것으로 나타났다. |
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Bibliography: | The Korean Society of Wood Science & Technology KISTI1.1003/JNL.JAKO200418164116305 G704-000240.2004.32.1.008 |
ISSN: | 1017-0715 2233-7180 |