Aster koraiensis Nakai (A. koraiensis) which has been used as a food and medicinal plant in the past, is valuable as functional food material. Therefore, the aim of this study was to determine the antioxidant properties and major phenolics of A. koraiensis extracts with different ethanol concentrations (0, 50, 70, and 100% aqueous ethanol solution). When ethanol concentration in the extraction solvent was increased, extraction yield decreased; 34.2, 23.2, 21.0, and 5.5% in 0, 50, 70, and 100% ethanolic extracts, respectively. Total phenolics content and antioxidant activities of extracts were increased in an ethanol concentration-dependant manner. The major phenolics in the extracts were chlorogenic acid (21.264~58.666 mg/g), isochlorogenic acid A (10.432~145.353 mg/g), and isochlorogenic acid C(0.239~13.148 mg/g), and these phenolic contents were higher in 70 and 100% ethanolic extracts than other extracts. Significant correlations were observed between ethanol concentration of extraction solvent, antioxidant properties, and major phenolics. These results indicated that the optimal ethanol concentration for extraction was 70%.

Abstract
서 론
재료 및 방법
    1. 재료
    2. 에탄올 농도별 벌개미취 추출물 제조
    3. 항산화 특성
    4. 페놀성 화합물 분석
    5. 통계분석
결과 및 고찰
    1. 에탄올 농도에 따른 벌개미취 추출물의 추출수율 및항산화 특성
    2. 에탄올 농도에 따른 벌개미취 추출물의 주요 페놀성화합물 조성
    3. 추출용매의 에탄올 농도와 항산화 특성 및 페놀성 화합물간의 상관성 분석
요약 및 결론
References

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• 지윤정(농촌진흥청 국립원예특작과학원 인삼특작부) | Yun-jeong Jee (Dept. of Herbal Crop Research, NIHHS, RDA)
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• 최수지(농촌진흥청 국립원예특작과학원 인삼특작부) | Su Ji Choi (Dept. of Herbal Crop Research, NIHHS, RDA)
• 이승은(농촌진흥청 국립원예특작과학원 인삼특작부) | Seung Eun Lee (Dept. of Herbal Crop Research, NIHHS, RDA) Corresponding author