首振り運動を行うバクテリアの菌体形状が遊泳運動に及ぼす影響(流体工学,流体機械)  [in Japanese] Effect of Body Shape on the Swimming of Wobbling Bacterium(Fluids Engineering)  [in Japanese]

In the present study, the wobbling motion of a single-flagellated bacterium was analyzed assuming that the bacterium consists of a cell body of prorate spheroid and flagellar helix, the axis of which is inclined to the major axis of the ellipsoid, and observed by using a dark field microscope. We investigated that the effect of body shape on swimming behavior such as propulsive velocity and wobbling frequency for various inclined angle of flagella about cell body major axis. As a result, it was found that the aspect ratio of cell body in which propulsive velocity becomes maximum are determined by the resistive force acting on the cell body and rotation frequency of flagella which vary with aspect ratio of cell body.