Journal of Bioscience and Bioengineering Vol. 94, No. 1 - 5 (July-November 2002) Cover

Takiguchi et al. found that the ciliated protozoan Paramecium caudatum ON-1 was repelled by 2,4-dichlorophenoxyacetic acid (2,4-D). The figure shows that after retarding the cell’s movement with glass fibers, a KCl-filled microelectrode was slowly inserted into the midsection of the cell on the coverslip by using a three-axis oil hydraulic micromanipulator.

Related article: Takiguchi et al., "Behavioral responses of the ciliated protozoan Paramecium caudatum to 2,4-dichlorophenoxyacetic acid and its analogues", J. Biosci. Bioeng., vol. 93, 416-420 (2002).