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Effect of Chilling Temperature of Carcass on Breast Meat Quality of Duck

Division of Applied Life Science, Gyeongsang National University, Jinju, Gyeongnam 660-701, Korea

¹ Corresponding author: stjoo{at}gnu.ac.kr

An experiment was carried out to investigate whether variations in chill water temperature affect muscle shortening and meat quality in duck breast. Three chill water temperatures were applied to duck carcasses at 20 min postmortem for 30 min, including in ice water at 0°C, in cold water at 10°C, and in water at 20°C. Results revealed that carcass temperatures were different (P < 0.05) at 50 and 120 min of postmortem with lower temperatures at the 0°C treatment (P < 0.05). The pH over the first 24 h postmortem was not different (P > 0.05) among treatments, with the exception of 50 min postmortem. The pH of breast meat in the 0°C treatment was higher (P < 0.05) than that of 20°C treatment at 50 min postmortem (just after chilling). No other differences (P > 0.05) in pH existed among treatments. Drip loss, cooking loss, and moisture content were not different for breast meat samples that were chilled at different temperatures. Differences (P < 0.05) were found in CIE (L*, a*, and b*) color values. Lightness (L*) increased, whereas redness (a*) decreased as the chill water temperature increased. Lower yellowness (b*) was found in the breast meat samples at the 10°C chill water temperature. However, shear force, sarcomere length, and protein solubility were not different (P > 0.05) among the breast meat samples chilled at different chill water temperatures. It may be concluded that chilling duck carcasses at different temperature ranges from 0 to 20°C did not influence muscle shortening or meat quality, except in regard to breast meat color.

Key Words: duck • chilling water temperature • breast meat quality