The Changes of Malonaldehyde and Fatty Acids Composition of Yellow Corvenia during Gulbi Processing and Storage

굴비의 가공.저장 중 Malonaldehyde 함량 및 지방산 조성 변화

  • Shin, Jung-Hye (Dept. of Hotel Curinary Arts & Bakery, Namhae College) ;
  • Kwon, O-Chen (Dept. of Hotel Curinary Arts & Bakery, Namhae College) ;
  • Kang, Min-Jung (Dept. of Hetel Curinary Arts & Changshin College) ;
  • Choi, Sun-Young (Dept. of Food Science and Nutrition, Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Lee, Soo-Jung (Dept. of Food Science and Nutrition, Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Sung, Nak-Ju (Dept. of Food Science and Nutrition, Institute of Agriculture and Life Science, Gyeongsang National University)
  • 신정혜 (남해전문대학 호텔조리제빵과) ;
  • 권오천 (남해전문대학 호텔조리제빵과) ;
  • 강민정 (창신대학 호텔조리제빵과) ;
  • 최선영 (경상대학교 식품영양학과.농업생명과학연구원) ;
  • 이수정 (경상대학교 식품영양학과.농업생명과학연구원) ;
  • 성낙주 (경상대학교 식품영양학과.농업생명과학연구원)
  • Published : 2006.12.31

Abstract

For the improvement of Gulbi processing, yellow corvenia was salted by 2 different time (5 hours, low salted and 5 days, high salted) and then dried in the sun and stored for 5 and 21 days, respectively. Malonaldehyde contents and fatty acid composition were analyzed during Gulbi processing. The moisture contents of yellow corvenia were significantly decreased during processing procedure. The salt contents were 10 folds higher in 5 day-salted sample than in 5 hour-salted one. The salt contents showed reversed tendency to moisture contents. There was little change in pH during storage. The contents of malonaldehyde in yellow corvenia were increased during Gulbi processing and storage. Its contents were higher in 5 day-salted sample and exterior parts than 5 hour-salted sample and interior parts of Gulbi. The fatty acids composition showed higher oleic acid $(C_{18:1})$, palmitic acid $(C_{16:0})$ and docosahexaenoic acid $(C_{22:6})$ than any other fatty acids in Gulbi. Saturated fatty acids were increased but unsaturated fatty acids were decreased during Gulbi processing. After 21 days storage, unsaturated fatty acids remaining ratio in 5 hour-and 5 day-salted sample were 1.39 and 0.99 respectively. The contents of unsaturated fatty acids were dramatically changed as salt concentration increased during storage than in processing.

저염 굴비의 가공 방법을 모색하고자 염장 기간을 달리하여 식염 농도가 상이한 굴비의 건조 및 저장 중 지질 과산화물인 malonaldehyde의 함량 및 지방산의 조성 변화를 분석 비교하였다. 천일염으로 염장 기간을 5시간과 5일로 달리하여 천일건조와 저장을 거치는 동안 수분의 함량은 각 가공 단계 및 저장 기간의 경과와 더불어 점차 유의적으로 감소하는 경향을 나타내었다. 염도는 5시간 염장 시료와 5일 염장 시료간에 약 10배의 차이가 있었으며, 수분과 상반되게 건조와 저장 과정을 거치면서 점차로 증가하는 경향을 보였고, pH는 저장 기간에 따른 차이가 미미하였다. Malonaldehyde는 5시간 염장 시료에 비하여 5일 염장한 시료에서, 근육부분보다는 표피 부분에서 더 높은 함량으로 정량되었으며 가공 과정을 거치면서 계속적으로 증가하는 경향이었다 지방산은 oleic acid $(C_{18:1})$, palmitic acid$(C_{16:0})$, docosahexaenoic acid$(C_{22:6})$의 함유 비율이 높았으며 가공을 거치면서 포화 지방산은 증가하고 불포화 지방산은 감소하는 경향이었다. 저장 21일에 5시간 염장 시료와 5일 염장 시료의 불포화 지방산 잔존율은 각각 1.39와 0.99로 굴비 가공 중 불포화 지방산은 첨가 식염의 농도가 높을수록, 가공보다는 저장 동안에 급격히 변화함을 알 수 있었다.

Keywords

References

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