摘要
为了建立沙门氏菌的生长模型并预测货架期,以熟鸡胸肉为载体,接种沙门氏菌,在恒温条件下进行培养,采用Logistic模型、Gompertz模型及Ratkowsky二级模型进行拟合,并预测其货架期。结果表明,沙门氏菌在4℃条件下无明显生长,在8~35℃能够正常生长,且温度越高生长速率越快,迟滞期越短。两种一级模型拟合的决定系数R2均达到了0.99,Logistic模型拟合度更高。采用二级Ratkowsky模型拟合的决定系数R2为0.9641。预测了8、16、25、35℃等4个温度下的货架期,分别为10.794、9.154、4.099、1.724 h。货架期与最大生长速率的相关系数为-0.9926,与迟滞期的相关系数为0.9931。
In order to establish the growth model of Salmonella and predict the shelf life,cooked chicken breast meat was inoculated with Salmonella and cultured under constant temperature.Logistic model,Gompertz model and Ratkowsky secondary model were used to fit and predict the shelf life.The results showed that Salmonella did not grow significantly at 4℃,but could grow normally at 8~35℃,and the higher the temperature,the faster the growth rate and the shorter the hysteresis period.The determination coefficient R2 of the two first-order models reached 0.99,and the fitting degree of Logistic model was higher.The determination coefficient R2 fitted by two-stage ratkowsky model is 0.9641.The shelf life at 8,16,25 and 35℃were predicted to be 10.794,9.154,4.099 and 1.724 h respectively.The correlation coefficient between shelf life and maximum growth rate was-0.9926,and the correlation coefficient with hysteresis was 0.9931.
作者
曾巧辉
余杏同
宋玉琼
王敬敬
王思婷
ZENG Qiao-hui;YU Xing-tong;SONG Yu-qiong;WANG Jing-jing;WANG Si-ting(School of Food Science and Technology,Foshan University,Foshan 528225,China;South China National Centre for Food Safety Research and Development,Foshan 528225,China)
出处
《佛山科学技术学院学报(自然科学版)》
CAS
2021年第6期42-48,56,共8页
Journal of Foshan University(Natural Science Edition)
基金
广东省科技计划资助项目(2020A1515110326)
佛山市科技计划资助项目(2018AB003681)。