SUPA and COSMIC, School of Physics & Astronomy, The University of Edinburgh, Mayfield Road, Edinburgh EH9 3JZ, United Kingdom.
Phys Rev Lett. 2011 Jan 7;106(1):018101. doi: 10.1103/PhysRevLett.106.018101. Epub 2011 Jan 5.
We demonstrate a method for the fast, high-throughput characterization of the dynamics of active particles. Specifically, we measure the swimming speed distribution and motile cell fraction in Escherichia coli suspensions. By averaging over ∼10(4) cells, our method is highly accurate compared to conventional tracking, yielding a routine tool for motility characterization. We find that the diffusivity of nonmotile cells is enhanced in proportion to the concentration of motile cells.
我们展示了一种快速、高通量的方法来描述活性粒子的动力学特性。具体来说，我们测量了大肠杆菌悬浮液中的游动速度分布和运动细胞分数。与传统的跟踪方法相比，通过对大约 10(4)个细胞进行平均，我们的方法具有很高的准确性，成为一种用于运动特性描述的常规工具。我们发现，非运动细胞的扩散系数与运动细胞的浓度成正比增加。
