Journal of Food Hygiene and Safety (한국식품위생안전성학회지)

The Korean Society of Food Hygiene and Safety (한국식품위생안전성학회)
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Stability of Ethanolic Extract from Cirsium setidens Nakai

고려엉겅퀴 주정추출물의 안정성 조사

  • Lee, Jin-Ha (Department of Food Science and Biotechnology, Kangwon National University) ;
  • Cho, Yang-Hwan (Department of Food Science and Biotechnology, Kangwon National University) ;
  • Cho, Bong-Yeon (Department of Food Science and Biotechnology, Kangwon National University) ;
  • Ra, Moon-Jin (Hongcheon Institute of Medicinal Herb) ;
  • Kim, Sun-Young (Hongcheon Institute of Medicinal Herb) ;
  • Kang, Il-Jun (Department of Food Science and Nutrition, Hallym University) ;
  • Han, Kyoung Chan (Hatti co. Ltd.) ;
  • Lee, Ok-Hwan (Department of Food Science and Biotechnology, Kangwon National University)
  • Received : 2016.06.17
  • Accepted : 2016.07.21
  • Published : 2016.08.30
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Abstract

This study was assessed stability of ethanolic extract from Cirsium setidens Nakai that will be applied for development of functional foods and ingredients. We evaluated pectolinarin content, total phenol content and antioxidant activity (DPPH radical scavenging activity and FRAP assay) of ethanolic extract from C. setidens Nakai against various temperature (4, 25 and $50^{\circ}C$) and pH (4.0, 7.0 and 10.0). Our results show that the pectolinarin and total phenol contents in ethanolic extract from Cirsium setidens Nakai slightly reduced during the storage periods. Moreover, the DPPH radical scavenging activity at $4^{\circ}C$ was higher than those of other temperature. Pectolinarin content, total phenol content and DPPH radical scavenging activity of ethanolic extract from Cirsium setidens Nakai at acidic (pH 4.0) and neutral (pH 7.0) pH ranges were higher than at alkaline pH ranges. These results indicate that the optimum storage condition of C. setidens Nakai ethanol extract are temperature $4^{\circ}C$ and pH 4.0-7.0 ranges.

본 연구에서는 고려엉겅퀴 추출물에 대한 열안정성, pH 안정성을 조사하고자 고려엉겅퀴 주정추출물은 온도별(4, 25 및 $50^{\circ}C$), pH별(4.0, 7.0, 및 10.0)로 저장하면서 추출물의 pectolinarin 함량, 총 페놀 함량, 2,2-diphenyl-1-picrylhydrazyl (DPPH) 라디칼 소거능 및 FRAP assay를 분석하였다. 고려엉겅퀴 추출물의 pectolinarin 함량은 저장기간이 증가함에 따라 다소 감소하는 경향을 보였으며, 온도에 의한 영향보다 pH에 의한 영향이 큰 것으로 나타났다. 총 페놀 함량도 pectolinarin 함량과 저장기간이 증가함에 따라 같이 감소하는 경향을 보였으며 저온($4^{\circ}C$)에서 보다 높은 온도인 $25^{\circ}C$와 $50^{\circ}C$에서 큰 감소치를 보였고 산성(pH 4.0)과 중성(pH 7.0)에서는 비교적 변화가 적었다. 항산화 활성은 저장기간이 증가함에 따라 DPPH 라디칼 소거능은 감소하는 경향을 보였으나 FRAP은 온도별, pH별 저장조건에 따른 큰 변화를 보이지 않았다. 이상의 결과를 고려해 볼 때, 고려엉겅퀴 주정 추출물은 산성(pH 4.0)과 중성(pH 7.0)조건에서 저온($4^{\circ}C$) 저장 시 추출물의 안정성을 최적화 할 수 있을 것으로 판단되었다.

Keywords

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