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2种耐压菌对盐水鸭货架期的影响

DOI: 10.7685/j.issn.1000-2030.2014.02.021, PP. 127-132

Keywords: 耐压菌,盐水鸭,货架期

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Abstract:

将前期研究分离得到的2种耐压菌蜡状芽孢杆菌(Bacilluscereus)和沃氏葡萄球菌(Staphylococcuswarneri)接种至盐水鸭胸肉中,以贮藏过程中理化性质的变化为指标,评价2种耐压菌对真空包装盐水鸭货架期的影响。结果表明2种细菌在盐水鸭胸肉中表现出很强的生长能力;由Gompertz方程得到沃氏葡萄球菌和蜡状芽孢杆菌的生长动力学参数,最大比生长速率分别为0.2575和0.4733h-1,延滞时间分别为5.1和11.2h,最大菌落数分别为7.18和6.53lg(CFU?g-1);在盐水鸭菌落总数的可接受范围内(<4.9lg(CFU?g-1)),2种耐压菌对盐水鸭胸肉贮藏过程中的pH值及挥发性盐基氮(TVB-N)值影响较小,其致腐能力较弱;在60h时(即菌落总数达到6lg(CFU?g-1)),蜡状芽孢杆菌对盐水鸭胸肉气味影响较大,接种该菌的样品与对照组样品的气味存在显著差别。结论耐压菌快速生长导致菌落总数超标可使货架期缩短,因此,控制耐压菌的快速生长是确保盐水鸭货架期的关键因素。

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