Swimming in circles: Motion of bacteria near solid boundaries
Swimming in circles: Motion of bacteria near solid boundaries
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DOI：
10.1529/biophysj.105.069401
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发表时间：
2006-01-01
影响因子：
3.4
通讯作者：
Stone, HA
中科院分区：
文献类型：
--
作者：
Lauga, E;DiLuzio, WR;Stone, HA
在固体边界附近，大肠杆菌以顺时针方向作圆周运动。我们为这种行为提供了一个流体动力学模型。我们表明，圆形轨迹是自然的后果，无力和无扭矩的游泳和流体动力学与边界的相互作用，这也导致了流体动力学捕获的细胞接近表面。我们比较了模型的结果与实验数据，并获得合理的协议。特别地，观察到轨迹的曲率半径随着细菌体的长度而增加。
Near a solid boundary, Escherichia coli swims in clockwise circular motion. We provide a hydrodynamic model for this behavior. We show that circular trajectories are natural consequences of force-free and torque-free swimming and the hydrodynamic interactions with the boundary, which also leads to a hydrodynamic trapping of the cells close to the surface. We compare the results of the model with experimental data and obtain reasonable agreement. In particular, the radius of curvature of the trajectory is observed to increase with the length of the bacterium body.