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Frozen Stability of Proteins Recovered from Fish Muscle by Alkaline Processing

알칼리 공정으로 회수한 어육 단백질의 동결 안정성

  • Hur, Sung-Ik (Division of Marine Life Science/Institute of Marine Industry, Gyeongsang National University) ;
  • Lim, Hyeong-Soo (Division of Marine Life Science/Institute of Marine Industry, Gyeongsang National University) ;
  • Kim, Jong-Hyun (Dept. of Food and Nutrition, Changwon College) ;
  • Choi, Yeung-Joon (Division of Marine Life Science/Institute of Marine Industry, Gyeongsang National University)
  • 허성익 (경상대학교 해양생명과학부) ;
  • 임형수 (경상대학교 해양생명과학부) ;
  • 김종현 (창원대학 식품조리과) ;
  • 최영준 (경상대학교 해양생명과학부)
  • Published : 2006.08.30

Abstract

Frozen stability of proteins recovered from white croaker and jack mackerel have been tested by measuring oxidation of residual lipid, browning, total plate count, and texture of gel during storage at $-20^{\circ}C$. The oxidation of residual lipid in recovered protein from Jack mackerel increased up to 60 days, and then decreased. Both browning values significantly was increased after 90 days. Total plate count was $1.2{\times}10^4\;CPU/g$ for proteins recovered from white croaker and $3.2{\times}10^4\;CPU/g$ for proteins recovered from jack mackerel in 60 days. The breaking force, deformation, and whiteness of gel formed from proteins recovered from white croaker did not change up th 120 days significantly, while proteins recovered from jack mackerel did not form heat-induced gel in 120 day. Frozen storage of the recovered protein was limited to 90 days for white croaker and to 60 days for jack mackerel considering the gelling ability and textural properties.

전갱이 회수단백질은 동결저장 기간이 경과함에 따라 잔여지질의 산화생성물도 크게 증가하였으며, 백조기와 전갱이 회수단백질의 갈변도는 저장 90일 이후에 크게 증가하였다. 일반세균의 수는 전갱이 회수단백질이 백조기 회수단백질에 비하여 높았으나, 시판 수리미에서 검출되는 생균수와 거의 일치하였다. 백조기 회수단백질 가열 젤의 파괴강도, 변형 값 및 백색도 값은 저장 120일까지 큰 변화를 보이지 않은 반면, 120일동안 동결저장한 전갱이 회수단백질은 가열 젤을 형성하지 못했다. 가열 젤 형성능과 파괴강도 및 변형 값에 미루어 수산가공을 위한 중간소재로서 백조기와 전갱이 회수단백질의 동결저장 한계는 안정성을 고려할 때 각각 90일과 60일이 적당할 것으로 예측하였다.

Keywords

References

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