开发一种微生物反应器,用于培养Bacillus subtilis生物膜
Mojca Seručnik1, Iztok Dogsa2, Lan Julij Zadravec1
1Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, SI-1000 Ljubljana, Slovenia.
Micromachines
|August 29, 2024
概括
细菌细菌生物膜的形成是由微流体反应堆中持续的空气供应增强的. 反应堆的几何结构没有显著影响总生物质,但氧气的可用性是强大的生物膜发展的关键.
科学领域:
- 微生物学 微生物学
- 生物技术是生物技术.
- 生物工程是生物工程.
背景情况:
- 了解Bacillus subtilis的生长和生物膜的形成对于各种工业和医疗应用至关重要.
- 微流体反应器为研究微生物行为提供受控环境.
- 优化氧气转移对于模拟体内条件和增强生物膜发育至关重要.
研究的目的:
- 研究微流体反应器几何和通风对Bacillus subtilis生物膜形成的影响.
- 在双通道微流体系统中,通过聚甲基 (PDMS) 膜评估氧气传递动态.
- 为了确定最大限度地提高Bacillus subtilis生物膜生长的最佳环境条件.
主要方法:
- 开发具有PDMS膜的双通道微流体反应器,用于控制的气液交换.
- 利用微型光学传感器和对氧气敏感的纳米粒子来测量溶解氧度.
- 采用数字图像分析来监测和量化不同反应器几何形状和通风条件下的Bacillus subtilis生物膜形成.
- 在72小时内以1μL/分钟的流速化培养物,以实现稳定的生物膜形成.
主要成果:
- 稳定的Bacillus subtilis生物膜在两个反应堆几何体内在72小时内形成,流量为1μL/分钟.
- 连续的空气供应显著增加了生物膜表面覆盖面和生物质度,而不是空气或100%氧气.
- 与没有扩展的反应堆相比,具有圆形扩展的微生物反应器几何结构并没有导致总生物质的增加.
- 氧气的可用性被确定为影响生物膜发展的关键因素.
结论:
- 持续的空气供应有利于增强微流体系统中的Bacillus subtilis生物膜形成.
- 虽然反应堆的几何学影响生物膜的分布,但氧气的可用性是生物质积累的主要驱动因素.
- 开发的微流体系统有效地允许研究生物膜发展的环境因素.
- 研究结果为优化微生物培养和生物膜工程在受控微观环境中提供了洞察力.
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