Ishikawa Takuji, Hota Masateru
Department of Bioengineering and Robotics, Graduate School of Engineering, Tohoku University, Aoba 6-6-01, Sendai 980-8579, Japan.
J Exp Biol. 2006 Nov;209(Pt 22):4452-63. doi: 10.1242/jeb.02537.
The interaction between two swimming Paramecium caudatum was investigated experimentally. Cell motion was restricted between flat plates, and avoiding and escape reactions were observed, as well as hydrodynamic interactions. The results showed that changes in direction between two swimming cells were induced mainly by hydrodynamic forces and that the biological reaction was a minor factor. Numerical simulations were also performed using a boundary element method. P. caudatum was modelled as a rigid spheroid with surface tangential velocity measured by a particle image velocimetry (PIV) technique. Hydrodynamic interactions observed in the experiment agreed well with the numerical simulations, so we can conclude that the present cell model is appropriate for describing the motion of P. caudatum.
对两个游动的尾草履虫之间的相互作用进行了实验研究。细胞运动被限制在平板之间，观察到了回避和逃避反应以及流体动力学相互作用。结果表明，两个游动细胞之间方向的变化主要是由流体动力引起的，而生物反应是一个次要因素。还使用边界元法进行了数值模拟。尾草履虫被建模为一个刚性球体，其表面切向速度通过粒子图像测速（PIV）技术测量。实验中观察到的流体动力学相互作用与数值模拟结果吻合良好，因此我们可以得出结论，目前的细胞模型适用于描述尾草履虫的运动。
