食品科学 ›› 2008, Vol. 29 ›› Issue (12): 115-119.

• 基础研究 • 上一篇    下一篇

大肠杆菌在猪背最长肌上生长预测模型的建立

 姜英杰, 邹晓葵, 彭增起   

  1. 南京农业大学食品科学技术学院; 江苏食品职业技术学院;
  • 出版日期:2008-12-15 发布日期:2011-12-08

Construction of Growth Prediction Model of Escherichia coli in Longissimus Dorsi Muscle

 JIANG  Ying-Jie, ZOU  Xiao-Kui, PENG  Zeng-Qi   

  1. 1.College of Food Science and Technology,Nanjing Agricultural University,Nanjing 210095,China;2.Jiangsu Food Science College,Huaian 223003,China
  • Online:2008-12-15 Published:2011-12-08

摘要: 本研究将大肠杆菌接种到无菌的猪背最长肌上,托盘包装后分别在4、7、10、13和16℃贮藏。用Statistica软件拟合不同温度下的生长情况,结果表明修正的Gompertz方程能很好的描述7~16℃下大肠杆菌在猪肉中的生长。温度对μmax(最大比生长速率)和Lag(延滞时间)的影响,采用平方根模型(Belehradek)描述呈良好线性关系。用贮藏在8℃和12℃下大肠杆菌的生长实验值验证所建立的模型,偏差度分别为0.943、0.960,准确度为1.063、1.094,表明所建立模型是有效的。

关键词: 大肠杆菌, 猪肉, 预测模型, 生长动力学

Abstract: The aseptic longissimus dorsi muscle was inoculated with Escherichia coli,and then was tray-packaged at 4,7,10,13 and16 ℃ for storage. The status of growth at different temperatures was fitted to linear model with the Statistica program. The results showed that growth of Escherichia coli in pork could be well described by Gompertz model in the range of temperature 7 to 16 ℃. The correlation regression of Belehradek model finely describes the influence of temperature on growth. The validation of the built model was carried out by comparing actual with predicted growth curves of Escherichia coli in pork at temperatures 8℃ and 12 ℃,respectively. Bias and accuracy factors were used as comparative indices which were 0.943,0.960 and 1.063,1.094 respectively. It was suggested the built model is effective.

Key words: Escherichia coli, pork, predictive model, growth kinetics