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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Changes of Volatile Odor Components in Onion by Freeze-drying

동결건조에 의한 양파의 휘발성 향기성분의 변화

  • 김준형 (조선대학교 식품영양학과) ;
  • 서혜영 (조선대학교 식품영양학과) ;
  • 노기미 (조선대학교 식품영양학과) ;
  • 한병재 (조선대학교 응용과학과) ;
  • 이성진 (조선대학교 응용과학과) ;
  • 서유석 (조선대학교 의과대학 약리학교실) ;
  • 김경수 (조선대학교 식품영양학과)
  • Published : 2005.02.01
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Abstract

Volatile organic components from fresh and freeze-dried onions were extracted by SDE apparatus and analyzed by GC/MS. Components of 40 and 31 were identified in fresh and freeze-dried onions respectively. These components included esters, aldehydes, ketones, alcohols and S-containing compounds. Major compounds of S-containing compounds such as 1-propanethiol, dipropyl trisulfide, and methyl propyl trisulfide in fresh onions were clearly decreased in freeze-dried onions. Then, S-containing compounds such as methyl allyl sulfide, propyl ally sulfide, dially disulfide and 3,5-diethyl-l,2,4-trithiolane and alcohols such as pentanol, hexanol and propanol were disappeared by freeze-drying. Exceptionally, ethyl acetate, dimethyl disulfide and 2-methyl-2-pentenal were increased as different trend with major S-containing compounds. (Z)-Propenyl methyl disulfide and (E)-propenyl methyl disulfide were also changed by freeze-drying in the similar pattern as mentioned above compounds.

SDE추출방법과 GC/MS 분석에 의하여 동결건조한 양파의 휘발성 유기정분변화를 비교 분석하였다 생양파와 동결건조양파에서 각각40와31종의 화합물이 확인되었으며, 이들은 ester류, aldehyde류, ketone류, alcohol류, 함황화합물류이었다. 함황화함물류들이 생양파와 동결건조 양파에서 주요 화합물로 가장 많은 함량을 차지하였고, 이 중 1-propanethiol과 dipropyl trisulfide, methyl propyl tirsulfide, dimethyl trisulfide는 생양파와 동결건조 양파에서 모두 다량 확인되었다. 생 양파에서 주요 성분으로 확인되었던 1-propanethiol, dipropyl trisulfide는 동결건조 양파에서 매우 감소되었고, methyl propyl trisulfide, methyl propyl disulfide 역시 같은 경향을 보였다. Methyl allyl sulfide, propyl ally sulfide, dially disulfide그리고 3,5-diethyl-1,2,4-trithiolane등의 함황화합물과 propanol, pentanol, hexanol 등의 alcohol류 등은 생양파에서 확인되었으나 동결건조 양파에서 확인되지 않았다. 이러한 결과를 통하여 양파의 건조과정 중 특징적인 휘발성 유기성분의 구성변화와 특성의 손실 그리고 효소 불활정화로 인한 휘발성 성분의 불완전한 생성 등을 알 수 있었다. 또한 동결건조 양파에서 ethyl acetate, dimethyl disulfide와 2-methyl-2-pentenal은 생 양파에서보다 그 함량이 증가되었고, (Z)-propenyl methyl disulfide와 (E)-propenyl methyl disulfide 또한 동결건조 양파에서 증가되어 짐을 확인하였다.

Keywords

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