2A1-B02 境界近傍での単毛性細菌の位置・姿勢の同時計測

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We experimentally investigate a hydrodynamic effect of a rigid surface on swimming of a singly flagellated bacterium. A three-dimensional swimming trajectory and orientation varying with time are obtained with biplane microscopy that enables us to observe the same sample from two directions simultaneously. This microscopy reveals relation between the distance from the surface and the motion of a swimming bacterium. Bacteria draw circular trajectories when they swim in the region within 2μm from a rigid surface. Although the flagellum is not able to be observed, assuming a reasonable flagellar length, we can infer the following: the flagellar filament touches the surface in some instances, as a result, either the hook connecting the filament to the motor becomes deformed, or the filament itself becomes considerably deformed, or both.
一般社団法人日本機械学会の論文