원문정보
Comparison of Antioxidant Activity of Kenaf Extract and its Flavonoids
초록
영어
In this work, the antioxidant activities of kaempferitrin, afzelin, rhamnoisorobin and kaemferol, which are the main flavonols of Hibiscus cannabinus L were studied. Kaempferol, aglycone of kaempferitrin, was found to be the most effective antioxidant and the antioxidant activity was decreased in the order of rhamnoisorobin, afzelin and kaempferitrin. The difference of DPPH radical scavenging activity between kaempferol and kaempferitrin was as high as 26.6 times. Although they have the same main structure except that they have two rhamnose (kaempferitrin) or one rhamnose (rhamnoisorobin, afzelin) or no rhamnose (kaemperol), the antioxidant activities of them were very different. The cause of this difference is not yet clear, but it seems that the rhamnose in the flavonol plays a critical role to determine the antioxidant activity of flavonols. From this result, we could conclude that the flavonoids with glycoside extracted from many kinds of plants should be converted into aglycones before they are employed as the antioxidant ingredient of cosmetics.
목차
Ⅰ. 서론
Ⅱ. 연구방법
1. 양마 추출물과 Kaempferitrin 분리
2. Amyloglucosidase를 이용한 당 제거
3. DPPH radical 소거능 측정
4. 총 폴리페놀 함량 측정
5. 총 플라보노이드 함량 측정
Ⅲ. 연구결과 및 고찰
1. 분리한 캠페리트린의 순도 확인
2. 효소를 이용한 캠페리트린의 당제거
3. 캠페롤과 배당체들의 항산화 활성
Ⅳ. 결론
참고문헌