조리방법에 따른 돼지고기 등심의 이화학적 특성 변화
Physicochemical Changes in Pork Loins Affected by Different Cooking Methods
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초록
동물성 지방의 섭취를 줄이기 위한 목적으로, 돼지고기 등심을 삶기, 찌기, 굽기 및 튀기기의 방법으로 가열조리한 후, 이화학적 특성의 변화를 조사하였다. 가열조리에 의하여 전체적으로 수분과 조지방 함량이 감소하였는데 튀기기 처리구에서는 조지방 함량이 증가하였다. 이에 따른 가열감량과 탈수량은 튀기기 처리구에서 가장 높았고, 탈유량은 찌기 처리구에서 가장 높았다. 시료의 pH는 가열조리에 의하여 증가하였고, 시료로부터 추출한 지질의 산가는 찌기 처리구에서, 굴절율은 튀기기 처리구에서 가장 많이 증가하였다. 경도, 점착성, 저작성 및 응집성은 가열조리에 의하여 증가하였는데 튀기기에 의하여 가장 많이 증가하였고, 탄력성은 삶기와 찌기에 의해서는 감소하였으나 굽기와 튀기기에 의해서는 거의 변화되지 않았다. CIE L*값은 가열조리에 의하여 증가하였는데 삶기와 찌기 처리구에서 크게 증가하였고, CIE a*값은 가열조리에 의하여 감소하였는데 삶기와 찌기 처리구에서 크게 감소하였으며, CIE b*값과 선명도를 나타내는 CIE C*값은 굽기와 튀기기 처리구에서는 증가하였지만 삶기와 찌기 처리구에서는 변화가 없었다. 가열조리 방법에 따른 시료의 지방산 조성은 튀기기 처리구를 제외하고는 거의 변화가 없었다.
Abstract
To decrease human intake of animal fats, changes in the physicochemical characteristics of pork loins prepared by different cooking methods (boiling, steaming, baking, and frying) were investigated. The moisture content of the cooked meat decreased with all methods, and the crude lipid content decreased with all methods except frying. The cooking loss and the moisture drain rate of the cooked meats were greatest during frying, whereas the lipid drain rate was greatest with steaming. The pH value increased during all cooking processes tested. The acid value and refraction index of meat fat markedly increased by steaming and frying, respectively. The hardness, gumminess, chewiness, and cohesiveness of the meat increased notably during frying. The springiness decreased by both boiling and steaming, but rarely by baking or frying. The CIE L* (lightness) value markedly increased by both boiling and steaming, and the CIE a* (redness) value decreased notably during both boiling and steaming. The CIE b* (yellowness) value increased by both baking and frying, but usually did not increase with either boiling or steaming. The composition of fatty acids was not significantly affected by any cooking methods except frying.
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