摘要
以鲜活鲢为研究对象 ,从肌肉组织冷冻切片、盐溶蛋白、Ca2 + ATP酶活性等角度研究在缓慢冻结条件下鲢的冷冻变性情况 ,并探讨鲢冷冻变性的机理。结果表明 :冻结前后 ,鲢肌肉纤维组织结构变化十分显著 ;鲢冻结至 - 35℃后盐溶蛋白下降了 14.8% ;Ca2 + ATP酶活性变化则不明显。
The fresh silver carp, Hypophathalmichthys molitrix, body weight 900～1 100 g, were frozen at -35℃ . During the frozen period, the tissue muscles were sampled and observed at 0℃,-5℃,-18℃, -25℃ , - 29℃ and -35℃, respectively,and their extractable protein nitrogen value(EPN)and Ca 2+ ATPase activity were tested also. The results show that the changes of muscleular tissues of silver carp are distinct during frozen; the ENP values decline dramatically at the beginning, especially from 0℃ to -5 ℃, and then get down slowly, which means when sliver carp is frozen, the temperature range(0～-5℃) should be passed as soon as possible so that the protein will not be changed seriously; no obvious changes happened in myofibril Ca 2+ ATPase activity during the whole frozen process.
出处
《中国水产科学》
CAS
CSCD
北大核心
2001年第2期85-87,共3页
Journal of Fishery Sciences of China
基金
中国水产科学研究院青年基金资助项目
