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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Analysis of Chemical Composition, Vitamin, Mineral and Antioxidative Effect of the Lotus Leaf

연잎의 일반성분, 비타민, 무기질 함량 분석 및 항산화 효과

  • 이경석 (호서대학교 식품생물공학과) ;
  • 권용준 (호서대학교 식품생물공학과) ;
  • 이기영 (호서대학교 식품생물공학과)
  • Published : 2008.12.31
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Abstract

This study was carried out for the analysis of chemical composition and antioxidative activity of lotus leaf. The lotus leaf contained 63.8% of crude carbohydrate, 16.9% of crude protein, 1.0% crude fat, and 9.3% of crude ash including high amount of calcium (2.2%). The antioxidative effect of several solvents extracts of lotus leaf was investigated. Among them 70% ethanol extract showed relatively higher extraction yield and higher total phenol content as well as the highest electron-donating ability using 1,1-diphenyl-2-picryl hydroxyl.

우리나라에 널리 분포하고 있는 연은 식용뿐만이 아니라 민간치료제로도 널리 이용되어져 왔다. 특히 연잎은 오랫동안 사찰에서 차와 술 등으로 제조되어 음용돼 왔으나 이에 대한 연구가 미비한 실정이다. 본 연구에서는 연잎의 성분분석 및 항산화 활성 등의 기초자료를 제공하고자 하였다. 건조한 연잎을 분석한 결과 탄수화물 63.8%, 단백질 16.9%, 지질 1.0%, 조회분 9.3%였다. 엽류 중 녹차와 비교했을 경우 단백질함량은 비교적 낮았고 탄수화물, 지방, 회분의 함량은 높았다. 비타민, 무기질 등 미량성분 분석결과를 녹차와 비교한 결과 비타민과 무기질은 큰 차이를 보여주지 않았으나 칼슘의 함량이 2.2%로 녹차에 비해 20배 이상 높았다. 연잎으로부터 효과적으로 기능성 물질을 추출하기 위해 다양한 용매로 고형분 함량, 총 페놀함량, 항산화력을 측정하였다. 비교실험결과 70% ethanol 추출물을 사용할 때 가장 높은 추출수율인 0.11%를 나타냈다. 또한 용매별 추출물의 총 페놀함량과 free radical 소거능을 측정해 비교한 결과 70% ethanol을 용매로 사용하였을 경우 가장 큰 효과를 나타냈다.

Keywords

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