Galvanotactic behavior of Tetrahymena pyriformis under electric fields

Title
Galvanotactic behavior of Tetrahymena pyriformis under electric fields
Authors
Dal Hyung KimPaul Seung Soo Kim이경우김진석Min Jun Kim
Issue Date
2013-12
Publisher
Journal of micromechanics and microengineering
Citation
VOL 23, NO 12, 125004-1-125004-9
Abstract
Tetrahymena pyriformis, a eukaryotic ciliate, swims toward a cathode in straight or cross-shaped microchannels under an applied electric field, a behavioral response called cathodal galvanotaxis. In straight channel experiments, a one-dimensional electric field was applied, and the galvanotactic swimming behavior of Tetrahymena pyriformis was observed and described in detail while the polarity of this field is switched. In most individual cases, the cell would immediately switch its direction toward the cathode; however, exceptional cases have been observed where cells exhibit a turning delay or do not turn after a polarity switch. In cross-channel experiments, feedback control using vision-based tracking was used to steer a cell in the microchannel intersection using a two-dimensional electric field generated by four electrodes placed at four ends of the cross channel. The motivation for this work is to study the swimming behavior of Tetrahymena pyriformis as a microrobot under the control of electric fields.
URI
http://pubs.kist.re.kr/handle/201004/46234
ISSN
09601317
Appears in Collections:
KIST Publication > Article
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