食品科学

• 生物工程 • 上一篇    下一篇

乳酸乳球菌SQ117在不同温度和pH值条件下的生长动力学

周 康,魏 君,蒋翠莲,韩新锋,刘书亮   

  1. 四川农业大学食品学院,四川 雅安 625014
  • 出版日期:2014-04-15 发布日期:2014-04-18

Growth Dynamics of Lactococcus lactis SQ117 under Different Temperatures and pHs

ZHOU Kang, WEI Jun, JIANG Cui-lian, HAN Xin-feng, LIU Shu-liang   

  1. College of Food Science, Sichuan Agricultural University, Ya’an 625014, China
  • Online:2014-04-15 Published:2014-04-18

摘要:

本实验针对发酵乳制品中分离鉴定得到的乳酸乳球菌SQ117,在不同的温度和pH值条件下进行其生长动力学的研究,采用以Baranyi模型为基础在线软件DMFit建立了一级模型,采用Ratkowsky模型建立了二级模型,最后对模型进行了验证。结果表明:DMFit在线软件能很好的拟合实验所得的生长曲线,是一种简单可靠的模型软件,通过一级模型获得的生长参数在二级模型的建立和验证中也具有很好的拟合属性。此外,将预测微生物学的理论应用于以乳酸乳球菌为代表的益生菌,还可以很好地描述其生长。

关键词: 预测微生物学, DMFit在线软件, 温度, pH值, 乳酸乳球菌

Abstract:

In this study, we used the isolated strain from fermented milk, which was identified as Lactococcus lactis SQ117,to study its dynamic growth under different temperatures and pH values. We used DMFit web-edition, which is basedon the Baranyi model, to establish the primary model, and Ratkowsky model was applied for the secondary model. Bothmodels were validated. The results showed that this DMFit software simulated the growth curve with an excellent goodnessof-fit indicating that DMFit is a functional and handy software. Furthermore, we also found that the theory of predictivemicrobiology had a good potential to describe the growth of lactic acid bacteria.

Key words: predictive microbiology, DMFit web-edition, temperature, pH, Lactococcus lactis