논문 상세보기
pp.582-586
남아프리카의 고산지대에서 자란 루이보스를 발효하여 가공한 루이보스 차는 항산화 효과를 가진 폴리페놀성 물질을 함유하고 있다고 알려져 있다. 본 연구에서는 루이보스 차 추출물 내의 폴리페놀성 물질의 존재여부와 함량 및 항산화 효과를 나타낸다고 알려진 vanillic acid, caffeic acid, syringic acid, 4-coumaric acid, ferulic acid의 동정 및 정량, 그리고 자유라디칼 소거능력을 통한 항산화 실험과 어
Total phenolic compounds and antioxidative activities of rooibos tea(Aspalathus linearis) fractions were studied. Three extracts, using hexane, ethyl acetate, and ethanol, were prepared. Total phenolic compounds were 3069.3 mg/100 g extract in the hexane fraction, 18604.4 mg/100 g extract in the ethyl acetate fraction, and 13458.8 mg/100 g extract in the ethanol fraction. Levels of vanillic acid, caffeic acid, syringic acid, 4-coumaric acid, and ferulic acid were analyzed by RP-HPLC, and totals of 3452.6 and 3156.1 mg/100 g of extract were found in the ethanol and ethyl acetate fraction, respectively. In the DPPH assay, the ethanol fraction(82.2% of contol) and the ethyl acetate fraction(78.9%) showed the highest free radical scavenging capacities. The induction period of each tea fraction in the fish oil rancimat assay was measured. When 500 ppm of the ethanol fraction was applied, a 1.19 h induction period was observed. This was 2-fold greater than the induction period of the control.
