冷鲜猪腩肉假单胞菌生长动力学模型的分析研究

摘要

以托盘包装冷鲜猪腩肉为研究对象,研究假单胞菌的生长变化与模型的构建和验证。结果表明：Gompertz方程拟合获得假单胞菌生长预测一级模型,相关系数R2值均大于0.99,总的平均偏差因子和准确因子均在1左右;利用平方根模型研究温度对一级模型动力学参数的影响,得到温度与最大比生长速率和延滞期方程分别为姨U=0.063×[T-（-12.79）]和姨1/LPD=0.086×[T-（-12.67）],其中T∈[0,20],R2分别为0.972和0.851,F统计量检验表明方程具有显著性。结论：建立的生长预测一级和二级模型能够很好的描述0℃~20℃下假单胞菌在冷鲜猪腩肉基质上的生长。%The growth changes and dynamic model of Pseudomonas from cooled streaky meat in pallet package were established and verified in this paper.The results showed that the prediction model fitting by modified Gompertz equation was good,and the related coefficient R2 were greater than 0.99,the general average bias factor and accuracy factor were closed to 1.Belehradek model had been used to describe the effect of temperature on its growth kinetic parameters,and the equations of temperature and its μmax and Lag time were U=0.063×[T-(-12.79)]and 1/LPD=0.086×[T-(-12.67)]T∈respectively,the related coefficient R2 were 0.972 and 0.851,the F statistical analysis showed that the equations was obvious.The conclusion was that the established models could well describe the growth of Pseudomonas from 0 ℃ to 20 ℃ on chilled streaky pork.