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Study on the Chemical Composition of Lotus Root and Functional Evaluation of Fermented Lotus Root Drink

연근의 성분분석 및 연근 발효음료의 기능성 평가

  • Bae, Man-Jong (Department of Herbal foodceutical Science, Daegu Haany University) ;
  • Kim, Soo-Jung (Efficacy and Safety Research Center for Traditional Oriental Medicine, Daegu Hanny University) ;
  • Ye, Eun-Ju (Efficacy and Safety Research Center for Traditional Oriental Medicine, Daegu Hanny University) ;
  • Nam, Hak-Sik (Efficacy and Safety Research Center for Traditional Oriental Medicine, Daegu Hanny University) ;
  • Park, Eun-Mi (Efficacy and Safety Research Center for Traditional Oriental Medicine, Daegu Hanny University)
  • 배만종 (대구한의대학교 한방식품약리학과) ;
  • 김수정 ((재)경북테크노파크 대구한의대학교 한방생명자원특화센터 효능검증원) ;
  • 예은주 ((재)경북테크노파크 대구한의대학교 한방생명자원특화센터 효능검증원) ;
  • 남학식 ((재)경북테크노파크 대구한의대학교 한방생명자원특화센터 효능검증원) ;
  • 박은미 ((재)경북테크노파크 대구한의대학교 한방생명자원특화센터 효능검증원)
  • Published : 2008.04.30

Abstract

This study examined the chemical composition of lotus root and functionally evaluated a fermented lotus root drink. Electron-donating ability using DPPH along with nitrite-scavenging ability were used to compare the antioxidative activities of unfermented and fermented lotus root drinks. The electron-donating abilities of the unfermented lotus root drink (1%) and fermented lotusroot drink (1%) were 22.55% and 23.88%, respectively. At pH 6.0, the nitrite-scavenging abilities of the unfermented lotus root drink and the fermented lotus root drink (100%) were 27.64% and 40.3%, respectively, and their scavenging ability increased in a dose-dependent manner at all pH values. In order to study the anti-obesity effects of the two drinks, male Sprague-Dawley rats were divided into four groups (A: basal diet, B: high fat diet, C: high fat diet+unfermented lotus root drink, D: high fat diet+fermented lotus root drink). Net weight gains were not significantly different among the four groups. Plasma total cholesterol concentrations significantly decreased in the groups receiving the unfermented and fermented lotus root drinks. Also, plasma total lipid and triglyceride contents were lower in the groups receiving the unfermented and fermented lotus root drinks as compared to the high fat diet group; however, the differences among the three groups were not significant.

본 연구에서는 연근의 건강식품 소재로서의 활용가능성을 확인하기 위하여 연근의 성분분석 및 연근을 이용하여 만든 연근음료 및 연근 발효음료의 항산화효과를 비교하였으며, 고지방식이를 공급한 흰쥐에게 연근음료 및 연근발효음료를 7주간 공급하여 혈청의 지방대사에 미치는 영향을 검토하여 다음과 같은 결과를 얻었다. 연근음료 및 연근발효음료는 1%에서 각각 25.55%, 23.88%의 항산화 활성을 나타내었고, 10%에서는 각각 87.5%, 95.81%로 항산화 활성이 매우 높게 나타났다. 또한 아질산염 분해활성은 pH 3.0 및 pH 6.0에서 연근음료의 경우 24.97%, 23.73%의 아질산염 분해활성을 나타내었으며, 연근발효음료도 음료의 농도에 비례하여 아질산염 분해활성이 증가하는 경향을 보였다. 고지방식이를 먹인 흰쥐에게 연근음료 및 연근발효음료를 7주간 병행 공급하였을 때 1일 체중증가량은 고지방식이 급여 대조군에 비해 감소하였으나 유의적이지는 않았다. 식이효율은 고지방식이를 급여한 실험군 모두가 정상군에 비해 유의적인 증가를 나타내었다. 체중 100g당 간의 무게는 고지방식이 급여 대조군에 비해 연근음료 투여군은 11.6%, 연근발효음료 투여군은 9.9% 감소하였으나 유의적이지는 않았다. 혈액 중 총 지방함량과 중성지방 함량은 연근음료와 연근발효음료 급여 시 고지방식이 급여 대조군에 비해 유의적인 차이가 나타나지 않았다. 혈액 중 총콜레스테롤 함량은 연근음료 및 연근발효음료 공급 시 고지방식이 급여 대조군에 비해 유의적인 감소를 나타내었으나 음료 종류에 따른 유의적인 차이는 나타나지 않았다.

Keywords

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