不同冰温贮藏对鸡胸肉品质变化的影响
Effects of quality variations of chicken breast during different ice temperature storage
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摘要: 以4 ℃冷鲜贮藏条件为对照,设置-0.7 ℃和-2.4 ℃两个冰温贮藏条件,贮藏期内定期对鸡胸肉的剪切力、硬度、pH值、挥发性盐基氮、菌落总数和大肠菌群指标进行测定,研究不同贮藏条件下鸡胸肉品质的变化;以贮藏时间为因子、菌落总数对数值为指标,建立不同贮藏温度条件下的货架期预测模型.结果表明:在-0.7 ℃和-2.4 ℃条件下贮藏鸡胸肉,随贮藏时间的延长,鸡胸肉的剪切力、pH值、挥发性盐基氮、菌落总数值缓慢上升,硬度迅速下降,大肠菌群变化缓慢,货架期分别为13 d和19 d;在4 ℃条件下贮藏鸡胸肉,其货架期为6 d.由此可见,冰温贮藏可有效延长货架期.Abstract: The control storage condition was 4 ℃,and the two ice temperature storage conditions were set up -0.7 ℃ and -2.4 ℃,respectively,and the indexes of the shear force,hardness,pH,TVB-N,aerobic bacterial counts and coliforms were investigated on a regular way, in order to research the quality change of chicken breast.With storage time as factor and aerobic bacterial counts as an index,shelf life prediction model under the conditions of different storage temperature was established.The results showed that the value of shear force,pH,TVB-N,aerobic bacterial counts increased slowly, the hardness value decreased rapidly,and coliforms changed slowly during the storage time under -0.7 ℃ and -2.4 ℃,besides,the shelf life was 13 d and 19 d respectively.However,the shelf life was 6 d under 4 ℃.The ice temperature storage could effectively prolong the time of storage.
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Key words:
- chicken breast /
- ice temperature storage /
- shelf life prediction model
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