食品科学 ›› 2007, Vol. 28 ›› Issue (3): 175-178.

• 生物工程 • 上一篇    下一篇

琼脂扩散法测定乳链菌肽效价的优化

 张国只, 陈林海, 杨天佑, 陈洪卫, 王利敏, 段宇珩, 秦广雍   

  1. 郑州大学离子束生物工程省重点实验室; 郑州大学离子束生物工程省重点实验室 河南郑州450052; 河南郑州450052;
  • 出版日期:2007-03-15 发布日期:2011-12-31

Optimization of Agar Diffusion Bioassay for Nisin

 ZHANG  Guo-Zhi, CHEN  Lin-Hai, YANG  Tian-You, CHEN  Hong-Wei, WANG  Li-Min, DUAN  Yu-Hang, QIN  Guang-Yong   

  1. Ion Beam Bioengineering Provincial Key Lab, Zhengzhou University, Zhengzhou 450052, China
  • Online:2007-03-15 Published:2011-12-31

摘要: 对影响琼脂扩散法测定乳链菌肽效价的四个主要因素:琼脂浓度、Tween20、培养温度、预培养进行了研究。结果表明,0.75%琼脂的效价检测培养基、0.5% Tween20的添加以及30℃培养条件,可提高乳链菌肽效价测定的灵敏度和精确性;4℃预培养有利于乳链菌肽在琼脂中的扩散。

关键词:  , 乳链菌肽, 琼脂扩散, 预培养

Abstract: The four major factors agar, Tween20, culture temperature and pre-diffusion, affecting the agar diffusion bioassay for nisin were studied. The results showed that when agar concentration is 0.75%, the addition of Tween20 0.5%, and the culture temperature 30℃, the accuracy and sensitivity of agar bioassay for nisin can be improved. And the pre-diffusion at 4℃ can enhance the diffusion of nisin in agar.

Key words: nisin, agar diffusion bioassay, pre-diffusion