Journal
BIOMICROFLUIDICS
Volume 4, Issue 3, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3481777
Keywords
biological fluid dynamics; bioMEMS; cellular biophysics; drag; microchannel flow; microorganisms; shear flow
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Funding
- University of Tokyo
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We have studied the contraction and extension of Vorticella convallaria and its mechanical properties with a microfluidic loading system. Cells of V. convallaria were injected to a microfluidic channel (500 mu m in width and 100 mu m in height) and loaded by flow up to similar to 350 mm s(-1). The flow produced a drag force on the order of nanonewton on a typical vorticellid cell body. We gradually increased the loading force on the same V. convallaria specimen and examined its mechanical property and stalk motion of V. convallaria. With greater drag forces, the contraction distance linearly decreased; the contracted length was close to around 90% of the stretched length. We estimated the drag force on Vorticella in the channel by calculating the force on a sphere in a linear shear flow. (C) 2010 American Institute of Physics. [doi:10.1063/1.3481777]
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