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Effect of Extraction Methods on Antioxidant Activities of Mori ramulus

추출방법에 따른 상지 추출물의 항산화 활성

  • Park, Hye-Mi (Department of Food Science and Technology, Catholic University of Daegu) ;
  • Hong, Joo-Heon (Department of Food Science and Technology, Catholic University of Daegu)
  • 박혜미 (대구가톨릭대학교 식품공학전공) ;
  • 홍주헌 (대구가톨릭대학교 식품공학전공)
  • Received : 2014.07.22
  • Accepted : 2014.09.02
  • Published : 2014.11.30

Abstract

The objective of this study was to examine the antioxidant activities of extracts from Mori ramulus using different extraction methods (HE, hot water extraction; EE, 50% ethanol extraction; UE, ultrasonic extraction; PE, pressured extraction). The extraction yield of PE (3.07%) was higher than that of UE (1.43%), EE (1.18%), and HE (1.07%). The total phenolic and flavonoid contents of EE were 334.66 mg/g, and 35.64 mg/g, respectively. The oxygen radical absorbance capacity (ORAC) of EE ($3,483.37{\mu}M/g$ FW) was higher than those of HE ($2,687.52{\mu}M/g$ FW), UE ($2,300.45{\mu}M/g$ FW), and PE ($2,117.62{\mu}M/g$ FW). The DPPH and ABTS radical scavenging activities of EE at $1,000{\mu}g/mL$ were 65.84%, and 97.52%, respectively. The superoxide radical scavenging activity of EE was 67.77~98.74% ($100{\sim}500{\mu}g/mL$) higher than those of other extracts. The ferric reducing antioxidant power and reducing power of EE were $189.00{\sim}974.80{\mu}M$, and 0.12~0.82, respectively. The tyrosinase inhibitory activity of EE (23.25~67.20%) improved with an increase treatment concentration. The antioxidant and tyrosinase inhibitory activities of EE were significantly higher than those of other extracts. In conclusion, we provided experimental evidence that extracts from Mori ramulus have potential as functional materials.

본 연구에서는 다양한 생리활성을 가진다고 알려져 있는 상지의 산업적 이용 증대 및 고부가가치 소재 개발을 목적으로 열수추출, 50% 에탄올추출, 초음파추출 및 가압추출 공정을 사용하여 상지 추출물의 추출방법에 따른 항산화 활성을 조사하였다. 추출수율은 가압추출, 초음파추출, 50% 에탄올추출 및 열수추출 순으로 나타났으며, 총 페놀 함량 및 플라보노이드 함량은 50% 에탄올 추출물에서 각각 334.66 mg/g 및 35.64 mg/g으로 가장 높은 함량을 나타내었으며, ORAC은 50% 에탄올 추출물에서 g당 $3,483.37{\mu}M$로 가장 높은 값을 나타내었다. DPPH radical 소거 활성은 50% 에탄올 추출물이 $100{\sim}1,000{\mu}g/mL$ 농도에서 17.34~65.84%로 가장 높은 활성을 나타내었으며, ABTS radical 소거 활성은 모든 시료에서 농도가 증가함에 따라 소거 활성이 증가하였다. Superoxide radical 소거 활성은 추출방법별 $100{\sim}500{\mu}g/mL$ 농도에서 62.56~98.74%로 높은 소거 활성을 나타내었다. FRAP 및 환원력은 50% 에탄올 추출물이 $100{\sim}1,000{\mu}g/mL$ 농도에서 각각 $189.00{\sim}974.80{\mu}M$ 및 0.12~0.82로 가장 우수하였다. Tyrosinase 저해 활성은 50% 에탄올 추출물이 $1,000{\mu}g/mL$에서 67.20%로 가장 높은 활성을 나타내었다. 따라서 50% 에탄올 추출방법이 상지의 항산화 활성이 우수한 추출물 제조방법으로 적합하였으며 산업적으로 적용 가능할 것으로 사료된다.

Keywords

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