Changes of Functional Properties of Garlic Extracts during Storage

마늘추출액의 저장 중 기능성성분 변화

  • Byun, Pyung-Hwa (Department of Food and Nutrition, Dongduk Women's University) ;
  • Kim, Woo-Jung (Department of Food Sciene and Technology, Sejong University) ;
  • Yoon, Suk-Kwon (Department of Food and Nutrition, Dongduk Women's University)
  • 변평화 (동덕여자대학교 식품영양학과) ;
  • 김우정 (세종대학교 식품공학과) ;
  • 윤석권 (동덕여자대학교 식품영양학과)
  • Published : 2001.06.30

Abstract

An invistigation was carried out to study the effects of heat treatment of garlic and storage temperature of garlic extracts on functional properties of garlic extracts. The garlic was heated at 40, 60, 80, 100, $120^{\circ}C$ for 10 minutes and extracted with 50% ethanol. The extracts were stored at 4, 25 and $50^{\circ}C$ for 30 days, and then electron donating ability(EDA), nitrite-scavenging effects(NSE) and total thiosulfinates contents were determined. Among the functional properties, total thiosulfinates were rapidly reduced as the heating and storage temperature increased. The total thiosulfinates in the extracts were not detected for those heat-treated at 100 and $120^{\circ}C$. The EDAs were also decreased to almost half of their initial level by heat treatment of garlic at higher temperature than $80^{\circ}C$ while NSE was decreased a little. As the storage temperature increased, EDA and thiosulfinate contents decreased. Particularly the thiosulfinates were ditected none after 11 days of storage at $25^{\circ}C$ and $50^{\circ}C$. Therefore, mild heat treatment of garlic at lower temperature than $60^{\circ}C$ and storage at refrigerated condition are recommendable for preparation and storage of garlic extracts.

생마늘과 가열마늘의 추출액들의 저장 중 기능성성분의 변화를 조사하기 위하여 40, 60, 80, 100, $120^{\circ}C$의 가열온도로 10분간 가열처리한 가열마늘과 생마늘을 ethanol 50%로 추출한 마늘추출액들을 4, 25, $50^{\circ}C$의 저장온도에서 30일간 저장하면서 추출액의 전자공여능, 아질산염 소거작용과 총 thiosulfinates 함량을 측정하여 마늘추출액의 저장 중 기능성 변화를 조사하였다. 이들 기능성성질 중 총 thiosulfinates 함량은 가열온도와 저장온도가 증가함에 따라 급격히 감소하여 가열온도 100와 $120^{\circ}C$에서 가열하였을 때에는 검출되지 않았다. 전자공여능은 가열온도$80^{\circ}C$ 이상의 추출액은 거의 초기의 1/2수준으로 감소한 반면에 아질산염 소거작용은 완만하게 감소하였다. 저장온도가 증가함에 따라 전자공여능과 총 thiosulfinates 함량은 감소하였는데, 특히 thiosulfinates 함량은 저장온도 25와 $50^{\circ}C$에서 11일후에는 전혀 검출되지 않았다. 따라서 마늘 성분의 추출은 마늘을 $60^{\circ}C$보다 낮은 온도로 가열처리하여 ethanol 50%로 추출한 후 냉장온도인 $4^{\circ}C$의 조건으로 저장하는 것이 마늘 추출액의 기능성성분들이 비교적 오래 유지되어 바람직한 것으로 판단된다.

Keywords