蜡样芽孢杆菌生长建模。
Modelling Bacillus cereus growth.
作者信息
Chorin E, Thuault D, Cléret J J, Bourgeois C M
机构信息
A.D.R.I.A, 6 rue de l'université, Quimper, France.
出版信息
Int J Food Microbiol. 1997 Sep 16;38(2-3):229-34. doi: 10.1016/s0168-1605(97)00110-4.
The aim of this study was to model the growth, in a model system, of toxigenic strains of Bacillus cereus as a function of temperature, pH and water activity. Optical density (OD) values were transformed into numbers of colony-forming units (CFU) by the use of a 'calibrating' relation. The growth curves were then fitted to the Gompertz function which allowed the estimation of the lag-time (lambda) and the growth rate (mu). These two parameters were then modelled according to the controlling factors which were pH and water activity at 20 and 30 degrees C.
本研究的目的是在模型系统中模拟蜡样芽孢杆菌产毒菌株的生长情况，该生长情况是温度、pH值和水分活度的函数。通过使用“校准”关系将光密度（OD）值转化为菌落形成单位（CFU）数量。然后将生长曲线拟合到Gompertz函数，该函数可用于估计延迟期（λ）和生长速率（μ）。随后根据20℃和30℃下的控制因素（pH值和水分活度）对这两个参数进行建模。
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