移动细菌穿越液体-液体接口的水性同位素-阴性共存阶段的移动细菌
Jiyong Cheon1, Joowang Son1, Sungbin Lim2
1Department of Physics, Ulsan National Institute of Science and Technology, Ulsan, Republic of Korea. jjeong@unist.ac.kr.
Soft matter
|September 9, 2024
概括
细菌Bacillus subtilis可以穿越液体-液体接口,垂直游泳增加了穿越概率. 进入阴性阶段,由于鞭毛束聚合,导致更快,更少的动运动.
科学领域:
- 微流体学 微流体学
- 生物物理学的生物物理.
- 软物质物理学 软物质物理学
背景情况:
- 细菌可以在复杂的流体中进行导航,但与多相环境的相互作用尚未完全理解.
- 细菌细菌 (B. subtilis) 是常见于各种自然环境中的杆状细菌.
研究的目的:
- 为了研究B. subtilis在一个准2D液晶系统中的运动和界面交叉行为.
- 了解如何界面特性和相位转换影响细菌的移动性和运输.
主要方法:
- 量化水性染色液晶的同otropic 和 nematic 阶段中的细菌轨迹.
- 开发一种力量平衡模型,结合界面张力来预测交叉行为.
- 在接口交叉时观察细菌游泳和鞭毛束动态的变化.
主要成果:
- 在垂直游泳时,B. subtilis具有越过同otropic-nematic接口的更高概率.
- 表面张力虽然很小,但显著影响细菌界面交叉.
- 细菌穿越到阴性阶段的游泳速度更快,摇摆减少,与鞭毛束聚合相关.
结论:
- 细菌的移动性和运输受到界面张力和相位行为的显著影响.
- 这些发现提供了对生物系统中跨相界的活跃传输机制的见解.
- 了解这些相互作用对于涉及复杂流体中微生物运输的应用至关重要.
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