Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Optimization of Extraction Conditions for Dried Jujube by Response Surface Methodology

반응표면분석에 의한 건대추의 추출조건 최적화

  • Woo, Koan-Sik (National Institute of Crop Science, Rural Development Administration) ;
  • Lee, Sang-Hoon (Dept. of Food Science and Technology, Chungbuk National University) ;
  • Noh, Jin-Woo (Dept. of Food Science and Technology, Chungbuk National University) ;
  • Hwang, In-Guk (Dept. of Food Science and Technology, Chungbuk National University) ;
  • Lee, Youn-Ri (Dept. of Food Science and Technology, Chungbuk National University) ;
  • Park, Hee-Jeong (Rural Development Administration) ;
  • Lee, Jun-Soo (Dept. of Food Science and Technology, Chungbuk National University) ;
  • Kang, Tae-Su (Dept. of Biofood Science and Biotechnology, Chungbuk Provincial College) ;
  • Jeong, Heon-Sang (Dept. of Food Science and Technology, Chungbuk National University)
  • Published : 2009.02.28
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Abstract

Extraction characteristics of dried jujube and functional properties of corresponding extract were monitored by response surface methodology. Maximum extraction yield of 53.69% was obtained at extraction temperature of $50.35^{\circ}C$, extraction time of 16.69 hr, and ethanol concentration of 72.88%. At extraction temperature, extraction time, and ethanol concentration of $45.80^{\circ}C$, 15.47 hr, and 73.12%, respectively, maximum cyclic adenosine monophosphate content was 8.20 mg/100 g. Maximum total polyphenol content was 18.85 mg/g at extraction temperature, extraction time, and ethanol concentration of $64.91^{\circ}C$, 20.84 hr, and 66.91%, respectively. Maximum total flavonoid content was 0.48 mg/g at extraction temperature, extraction time, and ethanol concentration of $57.36^{\circ}C$, 15.14 hr, and 71.08%, respectively. $IC_{50}$ value of electron donating ability showed maximum level of 32.34 mg/mL at extraction temperature of $48.46^{\circ}C$, extraction time of 19.25 hr, and ethanol concentration of 65.36%. Maximum ascorbic acid equivalent antioxidant capacity was 3.58 mg ascorbic acid equivalent per gram sample at extraction temperature, extraction time, and ethanol concentration of $56.09^{\circ}C$, 21.86 hr, and 65.36%, respectively.

중심합성계획법으로 조건을 설정하여 건대추를 각각의 조건에서 추출하여 수율 및 이화학적 특성을 분석하여 반응 표면분석을 실시한 결과 추출수율에 대한 최적조건은 추출온도 $49^{\circ}C$, 추출시간 17시간 및 에탄올 농도 73%로 나타났다. 건대추 추출물의 지표성분인 c-AMP 함량은 $50^{\circ}C$, 24시간, 80% 에탄올에서 8.92 mg/100 g으로 가장 높은 함량을 나타냈으며, $46^{\circ}C$, 15시간, 73% 에탄올에서 최적 추출조건을 가지는 것으로 나타났다. 건대추 추출물의 총 폴리페놀 및 플라보노이드 함량을 추출하는 최적의 조건은 16개의 실험구간에서 $60^{\circ}C$, 24시간, 60% 에탄올에서 각각 18.42 및 0.94 mg/g으로 나타났으며, 통계처리 결과 $65^{\circ}C$, 21시간, 67% 에탄올에서 최적조건을 가지는 것으로 나타났다. 건대추 추출물의 항산화활성($IC_{50}$)은 $60^{\circ}C$, 12시간, 60% 에탄올에서 5.87 mg/mL로 가장 높은 활성을 보였다. 통계처리 결과 $48^{\circ}C$, 16시간, 59% 에탄올에서 최적의 추출조건을 가지는 것으로 나타났으며, 총항산화력(AEAC)은 $60^{\circ}C$, 24시간, 60% 에탄올에서 5.04 mg AA eq/g으로 가장 높은 활성을 보였고 통계처리 결과 $48^{\circ}C$, 16시간, 71% 에탄올이 최적조건으로 나타났다. 전체적으로 볼 때 건대추의 최적 추출조건은 추출온도 약 $55^{\circ}C$, 추출시간 약 18시간, 에탄올 농도 약 72%의 조건으로 생각된다.

Keywords

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