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[1]陈 斐,黄天悦,张旭松,等.响应面法优化高产多聚谷氨酸菌株冻干保护剂的研究[J].武汉工程大学学报,2020,42(06):610-615.[doi:10.19843/j.cnki.CN42-1779/TQ.202008003]
 CHEN Fei,HUANG Tianyue,ZHANG Xusong,et al.Optimization of Lyophilized Protective Agent for Polyglutamic Acid Strains with High Yield by Response Surface Method[J].Journal of Wuhan Institute of Technology,2020,42(06):610-615.[doi:10.19843/j.cnki.CN42-1779/TQ.202008003]
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响应面法优化高产多聚谷氨酸菌株冻干保护剂的研究(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
42
期数:
2020年06期
页码:
610-615
栏目:
化学与化学工程
出版日期:
2021-01-30

文章信息/Info

Title:
Optimization of Lyophilized Protective Agent for Polyglutamic Acid Strains with High Yield by Response Surface Method
文章编号:
1674 - 2869(2020)06 - 0610 - 06
作者:
陈 斐黄天悦张旭松曾 鑫郭佳强陈孝平*
武汉工程大学环境生态与生物工程学院,湖北 武汉 430205
Author(s):
CHEN Fei HUANG Tianyue ZHANG Xusong ZENG Xin GUO Jiaqiang CHEN Xiaoping*
School of Environmental Ecology and Bioengineering, Wuhan Institute of Technology, Wuhan 430205, China
关键词:
响应面法高产γ-聚谷氨酸枯草芽孢杆菌冻干保护剂真空冷冻干燥
Keywords:
response surface method high-producing γ-polyglutamic acid bacillus subtilis freeze-drying protective additive vacuum freeze drying
分类号:
Q939.97
DOI:
10.19843/j.cnki.CN42-1779/TQ.202008003
文献标志码:
A
摘要:
采用实验室分离的一株高产γ-聚谷氨酸枯草芽孢杆菌(T1B)通过响应面法筛选优化高产γ-PGA菌株冻干保护剂配方。通过单因素试验,确定脱脂奶10%(质量分数,下同)、蔗糖10%、麦芽糖10%为T1B菌株冻干保护剂最优单因素。然后以细胞存活率为响应值确定了T1B菌株复合冻干保护剂的最优配方为:脱脂奶粉浓度为7.39%,蔗糖浓度为9.60%,麦芽糖浓度为10.71%。优化后的冻干保护剂在冻干过程中对于T1B菌体保护效果显著,菌体存活率的理论值最大为83.8%。并确定菌体最佳离心条件为7 000 r/min 5 min,复合冻干保护剂的最适pH为7.0,与菌体沉淀的最佳配比为2∶1,经验证此时菌体存活率为85.3%。
Abstract:
The formulation of a lyophilized protective agent for high-yield γ-PGA strain was optimized by response surface method using a laboratory isolated strain of high-yield γ-PGA Bacillus subtilis(T1B). Through a single factor test, it was determined that 10% skimmed milk, 10% sucrose, and 10% maltose were the best single factors for the T1B freeze-dried protective agent. Then, based on the response value of the cell survival rate, the optimal formula of the T1B composite freeze-dried protective agent was determined: the concentration of skimmed milk powder was 7.39%, the concentration of sucrose was 9.60%, and the concentration of maltose was 10.71%. During the freeze-drying process, the optimized lyophilized protectant had a excellent performance on the bacterial protection of T1B, and the maximum theoretical value of bacterial survival rate was 83.8%. It was also determined that the best centrifugation condition of the bacteria is 7 000 r/min in 5 min, the suitable pH of the composite freeze-dried protective agent is 7.0, and the best ratio of the bacteria mud is 2∶1, and the survival rate of the bacteria is 85.3%.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2020-08-03作者简介:陈 斐,硕士研究生。E-mail:2085573721@qq.com*通讯作者:陈孝平,博士,副教授。E-mail:xiao.ping.chen@foxmail.com引文格式:陈斐,黄天悦,张旭松,等. 响应面法优化高产多聚谷氨酸菌株冻干保护剂的研究[J]. 武汉工程大学学报,2020,42(6):610-615.
更新日期/Last Update: 2020-12-17