冷鲜猪排骨假单胞菌生长预测模型的建立与验证

为快速预测和监控冷鲜猪肉中微生物的生长,建立和验证冷鲜排骨中0℃～20℃温度条件下假单胞菌的生长预测模型.结果表明:Gompertz方程能很好地描述不同温度下假单胞菌的生长,得到的假单胞菌一级生长预测模型,且其偏差因子和准确因子都在1左右；利用平方根模型描述温度与最大比生长速率和延滞期的关系,且呈现良好的线性关系,R2分别为0.9934和0.9263,从而得到假单胞菌生长预测的二级模型.初步说明生长预测模型能有效地预测0℃～20℃冷鲜猪排骨中假单胞菌的生长.

Establishment and validation of predictive model of Pseudomonas from chilled pork ribs

For fast predicting and monitoring the growth of microorganism in chilled pork, predictive model of Pseudomonas from chilled pork ribs under 0℃~20℃ was established and validated. The first level predictive model of Pseudomonas growth was obtained by Gompertz equation since it can well describe the growth of Pseudomonas under different temperatures, and the bias factor and accurate factor are both close to 1. Square root model can well describe the relationship of temperature with maximum specific growth rate and lag phase, which was a linear relationship, so as to the secondary level predictive model of Pseudomonas growth was obtained. Variance analysis of the secondary models showed that the R2 were 0.9769 and 0.9153, respectively. The predictive models can effectively predict the growth of Pseudomonas under 0℃~20℃.