使用酸作为碳源的Rhodococcus sp. 优化聚基酸-co-3-hydroxyvalerate) 合成. 通过响应表面方法 lz1
Huijie Liu1, Fanzhe Chang1, Chengjiao Yu1
1School of Biological Science and Technology, University of Jinan, Jinan, China.
International journal of biological macromolecules
|November 26, 2024
概括
罗多科克 (Rhodococcus sp.) 是一种植物. lz1从不同的碳来源有效地产生聚基酸-基酸-基酸 (PHBV). 它缺乏脂多糖 (LPS) 增加了其生物塑料应用的潜力.
科学领域:
- 微生物学 微生物学
- 生物技术是生物技术.
- 聚合物科学 聚合物科学
背景情况:
- 活性污泥含有能够生产有价值的生物聚合物的微生物.
- 聚基酸-3-基酸-co-3-基酸 (PHBV) 是一种具有理想材料特性的可生物降解塑料.
- 罗多科克 (Rhodococcus sp.) 是一种植物. 从工业废水中分离出来的lz1对PHBV生产有前途.
研究的目的:
- 优化使用Rhodococcus sp.的Poly(-3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) 的生产条件. lz1.1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.lz1.l
- 描述合成PHBV的材料特性和潜在应用.
- 为了评估Rhodococcus sp.的适用性. lz1用于工业生物聚合物生产.
主要方法:
- 对于 Rhodococcus sp. 的分离和鉴定. lz1来自活性污泥.
- 使用Plackett-Burman和Box-Behnken设计优化发酵参数,包括碳源度,注射剂量和种子年龄.
- 响应表面方法 (RSM) 用于确定最佳生产条件.
- 使用核磁共振 (NMR) 光谱学对合成的多基酸盐 (PHA) 的表征.
- 使用热重力测量分析 (TGA) 进行热稳定性分析,使用凝透色谱 (GPC) 确定分子量.
主要成果:
- 优化条件 (6.8 g/L碳源,6.9%注射剂,11h种子年龄) 显著增加PHBV产量至41.87%.
- 核磁共振 (NMR) 证实该聚合物是Poly(-3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) 的.
- 热重力测量分析 (TGA) 显示分解温度 (Td5) 为270°C,凝浸透色谱 (GPC) 显示多分散度指数 (PDI) 为2.43,表明具有良好的延展性和热稳定性.
结论:
- 罗多科克 (Rhodococcus sp.) 是一种植物. lz1是一家强大的高产PHBV生产商.
- 细菌缺乏脂多糖 (LPS) 会减少免疫反应,增加其应用潜力.
- 优化的发酵条件和证明的材料特性支持使用这种菌株的PHBV生产的工业可行性.
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