摘要
采用预测食品微生物学的方法研究了豆腐 (豆浆 )中主要腐败微生物屎肠球菌的生长规律 ,建立了屎肠球菌在豆浆培养基中的初级和二级预测模型 ,研究了 0～ 5 5℃屎肠球菌的生长曲线。结果表明 ,在适温阶段屎肠球菌的生长曲线呈典型的S形 ,适合用Gompertz模型拟合 ;当温度接近最低生长温度和最高生长温度时 ,适合用线性回归方程拟合。屎肠球菌在豆浆中生长的温度模型符合Ratkowsky3式。根据预测模型 ,屎肠球菌的最低生长温度为 4 8℃ ,最高生长温度为 5 4 6℃ ,最适生长温度为 41℃。
The growth characteristics of the major spoilage bacteria in tofu - E.faecium was studied by using the method of predictive microbiology. And predictive models for the growth curves and the effects of temperature on growth of microorganism were established. Growth curves were fitted by using the model of Logistic, Gompertz and Monod functions, and specific growth rates derived from the curve fitting were modeled. The experiment results were as follows: A study to build mathematical models that predict the growth of E.faecium in soymilk (tofu) was carried out. Growth curves were obtained at 0-55?℃. The Gompertz model were found to fit with representation of experimental curves which are typical sigmoidal at 10-50?℃. The Monod function were found to fit with the experimental curve at below 10?℃ or above 50?℃. The variations of growth rate with temperature were modeled. Data processing of the model has shown that the minimum growth temperature for E.faecium is 4.8?℃, the maximum growth temperature is 54.6?℃ and the optimal growth temperature is 41?℃. The validity of the predictive model was evaluated under controlled laboratory conditions using soymilk.
出处
《中国农业大学学报》
CAS
CSCD
北大核心
2003年第2期49-54,共6页
Journal of China Agricultural University
基金
中日国际合作项目
