食品科学 ›› 2008, Vol. 29 ›› Issue (6): 146-150.

• 工艺技术 • 上一篇    下一篇

响应面法优化植物乳杆菌冷冻干燥保护剂配方的研究

 李家鹏, 张学刚, 乔晓玲, 牛晋阳   

  1. 中国肉类食品综合研究中心; 中国肉类食品综合研究中心
  • 出版日期:2008-06-15 发布日期:2011-08-26

Optimization of Formula of Cryoprotectants for Lactobacillus plantarum by Response Surface Methodology (RSM)

 LI  Jia-Peng, ZHANG  Xue-Gang, QIAO  Xiao-Ling, NIU  Jin-Yang   

  1. China Meat Reseach Center
  • Online:2008-06-15 Published:2011-08-26

摘要: 本实验应用二水平部分因子设计和响应面中心组合设计联用的方法筛选并优化了植物乳杆菌冷冻干燥的保护剂配方。实验结果表明,众多保护剂当中脱脂乳、海藻糖、硫酸锰的作用最为突出,能够显著提高细胞对冷冻和干燥的环境的耐受能力。以冻干后的细胞存活率为响应目标,响应面法优化的结果为:脱脂乳3.34%、海藻糖1.85%、硫酸锰0.25%。用此配方保护剂冻干样品时,能使细胞存活率达到96.8%±1.3%,与理论预测值较为接近。

关键词: 响应面法, 植物乳杆菌, 冷冻干燥保护剂, 直投式发酵剂

Abstract: The formula of cryprotectants for Lactobacillus plantarum was optimized by 2-Level factorial design and central composite design (CCD). The results indicated that the skim milk, trehalose , and MnSO4 are three key factors, which contribute to the survival of the cells after cryodesiccation. By CCD design and response surface analysis, the quadratic model for the three significant factors was established with cell survival rate as the target response. The optimal formula obtained is skim milk 3.34%, trehalose 1.85% and MnSO4 0.25%, and the cell survival rate reaches 96.8%±1.3%.

Key words: response surface methodology (RSM), Lactobacillus plantarum, cryprotectants, direct-to-vat starter (DVS)