역마이셀 미강유를 기질로 하여 rosemary, sage, oregano와 ginger의 메탄올과 헥산 추출물 500ppm에 카테킨 또는 아스코르브산 200 ppm을 각각 첨가하여 Rancimat으로 유도기간을 측정하여 항산화 상승효과를 조사하였다. Rosemary, sage, oregano와 ginger의 메탄을 추출물에 카테킨 첨가시 모두 상승효과를 나타내었으며, 아스코르브산을 첨가시 ginger를 제외하고는 항산화 상승효과를 보였다. 항산화 상승효과는 전반적으로 아스코르브산보다 카테킨이 높게 나타났다. 헥산 추출물의 경우, 카테킨 첨가시 oregano와 ginger에서 강한 상승효과를 보였으며, ascorbic acid 첨가시, rosemary와 sage에서 상승효과가 나타났다.
This study was peformed to investigate the synergistic effects of catechin and ascorbic acid on antioxidative activities of methanol and hexane extracts (500 ppm) from rosemary, sage, oregano, and ginger. Ascorbic acid (200 ppm) and (-)-catechin (200 ppm) could be solubilized in a rice bran oil via a reverse micelles using small amount of water and dioctyl sulfosuccinate as the sufactant. Methanol extracts from rosemary, sage, oregano, and ginger showed the synergistic effects by (-)-catechin. However, methanol extracts showed the synergistic effect by ascorbic acid except that of ginger. The synergistic effects of (-)-catechin on methanol extracts were higher than those of ascorbic acid. Hexane extracts of oregano and ginger showed the synergistic effects by (-)-catechin, and no synergistic effects by ascorbic acid. On the other hand, rosemary and sage showed the synergistic effects by ascorbic acid and no synergistic effects by (-)-catechin.
