抄録
Myofibrillar Ca2+ and Mg2+-ATPase activity, and physical and biochemical properties in a normal and burnt ordinary muscle model of cultured yellowtail Seriola quinqueradiata were examined. Results on physical and biochemical analysis showed important faster changes in the burnt model muscle samples compared to normal ones. The burnt model samples observed significantly higher values in color (L* and Chroma), and expressible water, IMP and lactic acid contents, than normal samples. Additionally, breaking strength, pH, ATP and glycogen were found to decrease very fast in burnt samples. Just after slaughter, the myofibrillar Ca2+ and Mg2+-ATPases activities showed no significant differences among the normal and burnt model samples, with values of 0.2 and 0.3μ mol/mg/min, respectively. After 2 h storage at 30℃, myofibrillar ATPases activities decreased to less than 0.1μ mol/mg/min in burnt model samples, while normal ones showed higher values.
