生孢梭菌孢子生长与失活模型的统一化研究

Preliminary Study on Integration of Growth and Inactivation Models of Clostridium sporogenes Spores

为探讨预测微生物生长和失活的预测模型统一化问题,研究将生孢梭菌孢子热失活"镜像化"曲线用描述微生物生长的Gompertz模型和Baranyi模型进行模拟,并通过标准预测误对两种模型进行比较。实验表明:两种模型都能较好的模拟生孢梭菌孢子热失活,但t检验分析差异不显著,标准预测误比较表明Gompertz模型优于Baranyi模型。建议用Gompertz模型统一描述生孢梭菌孢子生长和失活情况。

In order to verify the feasibility of using one model to predict microbial growth and inactivation,the＂ mirror image＂ curve of thermal inactivation for Clostridium sporogenes spores was fitted by Gompertz and Baranyi models describing microbial growth,respectively.Both traditional growth models were compared based on mathematical evaluation.Both Gompertz and Baranyi models had better fitting for microbial thermal inactivation and no significant difference was observed according to t-test analysis.Moreover,Gompertz model with lower standard error of prediction（SEP） was superior to Baranyi model.Therefore,we recommend the use of Gompertz model to describe both growth and inactivation of Clostridium sporogenes spores.