Antioxidant Activities of Clove by Extraction Solvent

This study was investigated on antioxidant activities of water, methanol and ether extracts of clove. The extraction yields of water, methanol and ether extracts were 34.7, 21.4 and 17.0%, respectively. Total phenolic contents of water, methanol and ether extracts were 23.1, 55.7 and 34.9%, respectively. Eugenol contents were 6.1 and 8.1% in methanol and ether extracts, but it was not detected in water extract. Electron donating abilities of water, methanol and ether extract were 36.1, 30.9 and 29.7%, respectively. In linoleic aicd system, the ether extract showed more high antioxidant activity than water and methanol extracts. The antioxidant activity of ether extract was almost equal that of $\alpha$-tocopherol, but weaker than that of BHT In linoleic acid emulsion system, the water extract showed higher or stronger antioxidant activity than methanol and ether extracts. Antioxidant activities in linoleic acid emulsion substrates were in order of BHT ＞water extract＞methanol extract＞ether extract＞ $\alpha$-tocopherol.

용매별 정향 추출물의 항산화효과

본 연구는 정향추출물(물, 메탄올 및 에테르)의 항산화 효과를 리놀레인산 기질 및 리놀레인산 에멀젼기질에서 비교, 검토하였다. 물, 메탄올 및 에테르용매에 따른 정향의 총페놀 함량은 23.1, 42.8, 34.9%로 메탄올＞에테르＞물 추출물 순이었다. Eugenol 함량은 메탄올 추출물의 경우 6.1%이었고 에테르 추출물 8.1%이었으며 물 추출물에서는 검출되지 않았다. 정향 추출물의 DPPH 소거효과는 물 추출물 경우 36.1%, 메탄을 추출물의 경우 30.9%, 에테르 추출물의 경우 29.7%로 나타났다. 리놀레인산 기질에서의 항산화 효과는 BHT＞에테르 추출물＞ $\alpha$-tocopherol＞메탄올 추출물＞물 추출물의 순이었다. 리놀레인산 에멀젼 시스템에서의 항산화 효과는 BHT＞물 추출물＞메탄올 추출물＞에테르 추출물＞ $\alpha$-tocopherol의 순이었다.