Abstract:
The objective of this study was to develop a first-order predictive growth model of S.maltophilia isolated from fresh- cut cabbage, then 10mL broth which was cultured about 18h was dissolved in 990mL physiological saline, solid-liquid ratio 1∶10, in which the processed fresh- cut cabbages were suspended 15s, and the samples was stored at 4, 7, 10, 15, 25 and 30℃ respectively, to establish the Gompertz model and Belehradek root square model, respectively, which used for shelf life prediction. The results indicated that the growth dynamics of S.maltophilia could be well fitted with the Gompertz function.The effect of temperature on maximum specific growth rate and the lag phase was well described by the Belehradek function as a good linear relationship.Validation of established kinetic models was carried out by comparing with experimental development of S.maltophilia grown on fresh-cut cabbage at 7℃ and 15℃, respectively.Basic errors between predicted shelf life and observed shelf life were-4.090% and 12.119% at 7℃ and 15℃, respectively.It suggested that microbial growth models established by our research could predict the growth of S.maltophilia in fresh-cut cabbage stored from 0 to 40℃.