구릿대(A. dohurica) 잎의 항산화성과 생리활성을 탐색하기 위하여 물과 에탄올을 용매로 환류 추출방법과 가압열수 추출방법으로 만든 각 추출물에 대하여 폴리페놀의 함량을 측정하였으며, 구릿대 잎의 항산화성을 알아보기 위하여 전자공여능, SOD 유사활성능, 아질산염 소거능을 측정하였다. 또한 xanthine oxidase 및 tyrosinase 저해 활성을 측정하여 구릿대의 생리활성에 대하여 분석하였다. 폴리페놀의 총 함량은 가압 열수 추출물

This study prepared extracts of Angelica dahurica leaves using reflux water extraction (RW), reflux ethanol extraction (RE) and pressure heating water extraction (PW). The extracts were extraction for levels of polyphenol compounds, antioxidant activities, and inhibitory potencies for xanthine oxidase and tyrosinase. The PW extraction method yielded the highest content of polyphenol compounds (95.23 mg/g). The electron donating abilities (EDAs) of RE and PW extracts were 76.02% and 70.08% respectively. The superoxide dismutase (SOD)-like activities were 13.45 19.00%, when extracts were assayed at 1 mg/mL. The nitrite scavenging ability (pH 1.2) of the PW extract was 54.33% higher than levels shown (44.24%) by the RE and RW extracts. The inhibition of xanthine oxidase by the RW extract was highest (99.71% at 5 mg/mL) while that of the PW extract was over 97% at 500 g/mL. Tyrosinase inhibition was highest in the RE extract (46.25% at 5 mg/mL). All extracts showed dose-dependent inhibitory activities. The results indicated that the PW extract had the highest polyphenol content, the RW and RE extracts had the best nitrite scavenging ability, and the RE extract showed the most pronounced effect on EDA, SOD-like activity and tyrosinase inhibition.

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