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Physicochemical Changes of Beef Loin by Different Cooking Methods

가열처리방법에 따른 쇠고기 등심의 이화학적 특성 변화

  • Yang, Jong-Beom (Department of Food Science and Biotechnology, Dongnam Health College) ;
  • Lee, Kyoung-Hae (Department of Food Science and Biotechnology, Dongnam Health College) ;
  • Choi, Sung-Up (Department of Food Science and Biotechnology, Dongnam Health College)
  • 양종범 (동남보건대학교 식품생명과학과) ;
  • 이경혜 (동남보건대학교 식품생명과학과) ;
  • 최성업 (동남보건대학교 식품생명과학과)
  • Received : 2012.04.13
  • Accepted : 2012.06.01
  • Published : 2012.06.30

Abstract

To decrease the intake of animal fat and cholesterol, the changes in the physicochemical characteristics of beef loin cooked through different methods (boiling, steaming, baking, and frying) were investigated. The cooking weight loss, moisture drain rate, and cholesterol drain rate were highest during frying, whereas the lipid drain rate was highest during boiling. The pH value increased markedly during steaming, the acid value of meat fat increased remarkedly during boiling, and the refractive index of meat fat increased notably upon frying. The hardness of meat was remarkedly increased by steaming. The gumminess and chewiness of meat were notably increased by frying. The springiness slightly decreased during all the cooking methods, and the cohesiveness was not significantly affected by any cooking process. The CIE $L^*$ (lightness) value increased markedly during boiling, the CIE $a^*$ (redness) value decreased markedly during both boiling and steaming, and the CIE $b^*$ (yellowness) value decreased notably during all the cooking methods. The fatty acid composition did not significantly change after cooking, except when the meat was fried. Therefore, boiling is an effective cooking method for beef loin to decrease the intake of animal fat.

쇠고기 등심을 섭취할 때에 동물성 지방과 콜레스테롤의 섭취를 줄일 수 있는 효과적인 가열처리 방법을 제시하기 위하여 쇠고기 등심을 삶기, 찌기, 굽기 및 튀기기의 방법으로 가열처리한 후, 이화학적 특성의 변화를 조사하였다. 가열처리에 따른 가열감량, 탈수량 및 탈콜레스테롤양은 튀기기 처리구에서 가장 높았고, 탈유량은 삶기 처리구에서 가장 높았다. 시료의 pH는 찌기 처리구에서, 시료로부터 추출한 지질의 산가는 삶기 처리구에서 그리고 굴절율은 튀기기 처리구에서 가장 많이 증가하였다. 시료의 경도, 점착성 및 저작성은 가열처리에 의하여 크게 증가하였는데, 경도는 찌기 처리구에서 점착성과 저작성은 튀기기 처 리구에서 가장 많이 증가하였다. 탄력성은 가열처리에 의하여 감소하였으며, 응집성은 가열처리에 의하여 거의 변화가 없었다. CIE $L^*$ 값은 가열처리에 의하여 증가하였는데 삶기 처리구에서 가장 크게 증가하였고, CIE $a^*$ 값은 모든 처리구에서 감소하였는데 삶기와 찌기 처리구에서 크게 감소하였으며, CIE $b^*$ 값은 모든 처리구에서 크게 감소하였다. 가열처리 방법에 따른 시료의 지방산 조성은 튀기기 처리구를 제외하고는 거의 변화가 없었다. 그러므로 쇠고기 등심을 섭취할 때, 동물성 지방의 섭취를 줄이기 위한 가열처리 방법은 삶기가 효과적이라고 생각되지만 기호적인 가치 등을 고려한 추가 연구가 필요하다고 생각된다.

Keywords

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