›› 2015, Vol. 42 ›› Issue (12): 3268-3273.doi: 10.16431/j.cnki.1671-7236.2015.12.023

• 生理生化 • 上一篇    下一篇

喷雾干燥细菌素的生物学活性研究

卫旭彪, 武如娟, 郑召君, 马广, 廖秀冬, 张日俊   

  1. 中国农业大学饲料生物技术实验室, 动物营养学国家重点实验室, 北京 100193
  • 收稿日期:2015-06-18 出版日期:2015-12-20 发布日期:2015-12-30
  • 通讯作者: 张日俊 E-mail:zhangrj621@126.com
  • 作者简介:卫旭彪(1990-),男,山西吕梁人,硕士生,研究方向:动物营养与饲料生物技术,E-mail:weixubiao01@126.com
  • 基金资助:
    国家自然科学基金(31272476)

Study on the Biological Activity of a Spray Dried Bacteriocin

WEI Xu-biao, WU Ru-juan, ZHENG Zhao-jun, MA Guang, LIAO Xiu-dong, ZHANG Ri-jun   

  1. State Key Laboratory of Animal Nutrition, Laboratory of Feed Biotechnology, China Agricultural University, Beijing 100193, China
  • Received:2015-06-18 Online:2015-12-20 Published:2015-12-30

摘要: 为了初步研究前期试验筛选获得的枯草芽孢杆菌产细菌素的生物学活性,本试验采用杯碟扩散法绘制出硫酸黏杆菌素和杆菌肽锌两种抗生素的抑菌效价标准曲线,用抗生素效价当量来评价细菌素的活性,并在不同温度处理下测定其抗菌活性和热稳定性。结果表明,125 mg/mL细菌素溶液抑菌效价与26 mg/mL硫酸黏杆菌素或11.9 mg/mL杆菌肽锌溶液相当。此外,该细菌素在高温条件下(60~80 ℃)处理15 min仍能维持较高抑菌活性。综上所述,本试验在细菌素和抗生素的抑菌活力之间建立了更直观的联系,并证明了该细菌素具有较好的热稳定特性,为其产业化推广提供了理论支持和技术借鉴。

关键词: 细菌素; 抗生素; 抑菌活力; 热稳定性

Abstract: The standard curve of two antibiotics (colistin sulfate and bacitracin zinc) was carried out to assess antimicrobial activity of bacteriocin,which obtained from our earlier work,using cup-dish method.In addition,we also observed the effects of the reaction temperature on the antibacterial activity of the bacteriocin.Results showed that 125 mg/mL bacteriocin displayed similar antibacterial activity to 26 mg/mL colistin sulfate or 11.9 mg/mL bacitracin zinc.Furthermore,the bacteriocin remained good thermal stability under high temperature (nearly 60 to 80 ℃) in 15 minutes.Overall,this research built a direct relationship between this bacteriocin and antibiotics,and testified good stablility of this bacteriocin,providing theoretical support and technology reference to promote its large scale production.

Key words: bacteriocin; antibiotics; antibacterial activity; thermal stability

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