Funnel ratchets in biology at low Reynolds number: Choanotaxis

Peter Galajda; Juan Keymer; Joanna Dalland; Sungsu Park; Songzi Kou; Robert Austin

doi:10.1080/09500340802495826

Funnel ratchets in biology at low Reynolds number: Choanotaxis

Peter Galajda, Juan Keymer, Joanna Dalland, Sungsu Park, Songzi Kou, Robert Austin

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

We present an example of a ratchet phenomena in biology consisting of swimming bacteria in an enclosed structure separated by a wall of funnels. The funnels serve to concentrate bacteria that are motile, in spite of the fact that the motion occurs at low Reynolds numbers and would be expected to be time reversible invariant. We discuss some of the basic ideas which underly the phenomena including spatial and temporal coherence of the motion of bacteria and interaction of the bacteria with surfaces.

Original language	English (US)
Pages (from-to)	3413-3422
Number of pages	10
Journal	Journal of Modern Optics
Volume	55
Issue number	19-20
DOIs	https://doi.org/10.1080/09500340802495826
State	Published - Nov 2008

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

Keywords

Bacteria
Biology
Low Reynolds number
Phase space
Ratchet
Reversible
Time dependence

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10.1080/09500340802495826

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title = "Funnel ratchets in biology at low Reynolds number: Choanotaxis",

abstract = "We present an example of a ratchet phenomena in biology consisting of swimming bacteria in an enclosed structure separated by a wall of funnels. The funnels serve to concentrate bacteria that are motile, in spite of the fact that the motion occurs at low Reynolds numbers and would be expected to be time reversible invariant. We discuss some of the basic ideas which underly the phenomena including spatial and temporal coherence of the motion of bacteria and interaction of the bacteria with surfaces.",

keywords = "Bacteria, Biology, Low Reynolds number, Phase space, Ratchet, Reversible, Time dependence",

author = "Peter Galajda and Juan Keymer and Joanna Dalland and Sungsu Park and Songzi Kou and Robert Austin",

note = "Funding Information: We thank Cynthia Olson Reichhardt, Charles Reichhardt, Pascal Silberzan, William Ryu, Guillaume Lambert and David Liao for valuable discussions. This work was supported by the AFOSR (FA9550-05-01-0365), NIH (HG01506), NSF Nanobiology Technology Center (BSC-ECS9876771), Cornell NanoScale Science and Technology Facility (NSF Grant ECS-9731293), and DARPA.",

year = "2008",

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doi = "10.1080/09500340802495826",

language = "English (US)",

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journal = "Journal of Modern Optics",

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T2 - Choanotaxis

AU - Galajda, Peter

AU - Keymer, Juan

AU - Dalland, Joanna

AU - Park, Sungsu

AU - Kou, Songzi

AU - Austin, Robert

N1 - Funding Information: We thank Cynthia Olson Reichhardt, Charles Reichhardt, Pascal Silberzan, William Ryu, Guillaume Lambert and David Liao for valuable discussions. This work was supported by the AFOSR (FA9550-05-01-0365), NIH (HG01506), NSF Nanobiology Technology Center (BSC-ECS9876771), Cornell NanoScale Science and Technology Facility (NSF Grant ECS-9731293), and DARPA.

PY - 2008/11

Y1 - 2008/11

N2 - We present an example of a ratchet phenomena in biology consisting of swimming bacteria in an enclosed structure separated by a wall of funnels. The funnels serve to concentrate bacteria that are motile, in spite of the fact that the motion occurs at low Reynolds numbers and would be expected to be time reversible invariant. We discuss some of the basic ideas which underly the phenomena including spatial and temporal coherence of the motion of bacteria and interaction of the bacteria with surfaces.

AB - We present an example of a ratchet phenomena in biology consisting of swimming bacteria in an enclosed structure separated by a wall of funnels. The funnels serve to concentrate bacteria that are motile, in spite of the fact that the motion occurs at low Reynolds numbers and would be expected to be time reversible invariant. We discuss some of the basic ideas which underly the phenomena including spatial and temporal coherence of the motion of bacteria and interaction of the bacteria with surfaces.

KW - Bacteria

KW - Biology

KW - Low Reynolds number

KW - Phase space

KW - Ratchet

KW - Reversible

KW - Time dependence

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ER -

Funnel ratchets in biology at low Reynolds number: Choanotaxis

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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