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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Studies on Physiological Properties of Isoflavone from Soybean and Its Processing Properties

콩 함유 이소플라본의 생리활성과 가공적성

  • Han, Jin-Suk (Division of Food Science, Dong-Eui Institute of Technology) ;
  • Ha, Tae-Youl (Food Function Research Division, Korea Food Research Institute) ;
  • Kim, Sung-Ran (Food Function Research Division, Korea Food Research Institute)
  • 한진숙 (동의과학대학 식품과학계열) ;
  • 하태열 (한국식품연구원 식품기능연구본부) ;
  • 김성란 (한국식품연구원 식품기능연구본부)
  • Published : 2006.12.29
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Abstract

The antioxidant activity, nitrite scavenging effect, and angiotensine I-converting enzyme inhibiting activity of solvent extracts of soybean isoflavone were investigated. Also anticarcinogenic activities of them were examined by MTT assay using human cancer cell line. Isoflavone aglycones showed relatively high antioxidant activity in order of glycitein, genistein, and daidzein. Methanol extract of soybean actively scavenged free radicals and was shown excellent nitrite scavenging effect. Glycitein and methanol extract of soybean inhibited the growth of human cancer cell such as stomach carcinoma (SNU-1) and colon carcinoma (SNU-C4) effectively. Genistein, daidzein and methanol extracts of soybean inhibited the growth of cancer cell such as stomach carcinoma (SNU-1), but had weak activities to colon carcinoma (SNU-C4). To applicate the soybean isoflavone as an enhancer for food quality and processibility, the stabilities on heat and pH of isolated isoflavone, isoflavone in soybean flour and isoflavone concentrate of soybean were investigated. Stability of isoflavone concentrate of soybean was decreased in pH extreme (below 3, above 8) during sterilization, but isoflavone in soybean flour showed higher stability in all pH range. All kinds of isoflavone tested in this study were very stable during the heat treatment.

본 연구에서는 콩 식품의 품질 및 가공적성을 최적화하기 위해 대두 이소플라본 추출물의 생리활성과 가공적성에 대한 실험을 수행하였다. 메탄을 추출 이소플라본의 free radical 소거능이 가장 우수하였고, 아질산 소거능은 메탄올, 에탄올과 열수추출물의 순으로 나타났다. ACE 저해작용은 이소플라본이 가장 많이 추출된 메탄올 추출물보다 열수추출물에서 더 큰 효과를 보였다. 또한, 한국인에게 호발하는 위암세포(SNU-1)과 대장암세포(SNU-C4)에 대한 이소플라본 및 대두 추출물의 항종양활성을 확인하였다. 대두 이소플라본이 가공제품이나 특수영양식품으로 가공될 때 문제가 될 수 있는 여러 조건별 안정성을 검토하기 위하여, 분말상태의 대두 이소플라본 농축물$(20\sim40%)$, 99% 이소플라본 표준품, 대두상태의 이소플라본을 대상으로 열, pH, 살균조건에 따른 안정성을 조사하였다. 대두 이소플라본 농축물은 pH 3 이하와 pH 8 이상의 pH에서 크게 감소하였으나 대두 상태의 이소플라본은 pH에 따른 이소플라본의 함량 감소가 없이 거의 일정하게 유지되었다. 99% 이소플라본 표준품은 산성 pH에서는 안정하나 알칼리에서는 대두 이소플라본 추출물보다 감소폭이 컸다. 한편 이소플라본의 열안정성은 우수하여 이소플라본은 식품의 일반적인 가공 조건에서 안정적인 것으로 나타났다.

Keywords

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