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 of Sarcodon aspratus by Response Surface Methodology

반응표면분석에 의한 능이버섯 추출물의 추출조건 최적화

  • Received : 2014.12.01
  • Accepted : 2015.02.25
  • Published : 2015.03.31
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Abstract

Response surface methodology (RSM) was used to monitor extraction characteristics of extracts from Sarcodon aspratus. Based on a central composite design, independent variables were microwave power (30~150 W), ethanol concentration (0~100%), and extraction time (1~9 min). Dependent variables were yield, electron-donating ability, total phenol contents, and SOD-like activity. Coefficients of determination ($R^2$) for dependent variables ranged from 0.80 at 0.97. The maximum extraction yield was 50.28% under conditions of 125.1 W microwave power, 18.67% ethanolic concentration, and 7.06 min extraction time. The maximum extraction electron-donating ability was 22.14% under conditions of 31.09 W, 45.76%, and 4.32 min. The maximum extraction total polyphenol content was 30.54 mg tannic acid equivalent/g at 122.54 W, 48.05%, and 8.36 min. The maximum extraction SOD-like activity was 33.44% at 121.17 W, 47.42%, and 8.41 min. Based on superimposition of four dimensional RSM with respect to extraction yield, electron-donating ability, total polyphenol content, and SOD-like activity obtained under various extraction conditions, optimum ranges of extraction conditions were found to be microwave power of 78~88 W, ethanol concentration of 39~57%, and extraction time of 3.5~9 min.

능이버섯의 수율과 항산화 활성을 측정하여 효율적 추출조건을 예측하기 위해 마이크로웨이브 에너지, 에탄올 농도, 추출시간의 요인 변수를 중심합성법에 따라 설정하여 반응 표면분석을 통해 최적화 조건을 설정하였다. 능이버섯 추출물의 수율, 전자공여작용, 총 폴리페놀 함량, SOD 유사 활성에 대한 반응표면의 회귀식 $R^2$값이 각각 0.97, 0.90, 0.80 및 0.87로, 수율, 전자공여작용 및 SOD 유사 활성이 각각 P<0.001, P<0.05 및 P<0.05 수준에서 유의성이 인정되었다. 능이버섯은 요인 변수에 따라 수율은 마이크로웨이브 에너지의 영향을 가장 많이 받았고, 에탄올 농도에 따른 영향도 있었다. 그 외 종속변수인 전자공여능과 SOD 유사 활성은 에탄올 농도에 따른 영향을 받는 것으로 나타났다. 추출물의 각 특성을 모두 만족시키는 최적의 추출조건의 범위는 superimposing 하여 마이크로웨이브 에너지 78~88 W, 에탄올 농도 39~57%, 추출시간 3.5~9분으로 예측되었다.

Keywords

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