Chemotactic Responses by Motile Bacteria
نویسندگان
چکیده
منابع مشابه
Motile Behavior of Bacteria
© 2000 American Institute of Physics, S-0031-9228-0001-010-3 E coli is a singlecelled organism that lives in your gut. It is equipped with a set of rotary motors only 45 nm in diameter. Each motor drives a long, thin, helical filament that extends several cell body lengths out into the external medium. The assemblage of motor and filament is called a flagellum. The concerted motion of several f...
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For over 30 years the technique of microelectrophoresis has been used to study the surface properties of bacteria and other particles of microscopic size. Since flagella undoubtedly act as cellular surface components, they would be expected to contribute to the electrophoretic behavior of the cells. Likewise, vital motion might be expected to complicate electrophoretic measurements of flagellat...
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The (( Intermediate scattering function )t I(K, t ) of light scattered by motile bacteria is shown to be I(K, t ) = rn sin KVt jo T v T Ps(V) dV, (1) where Ps(V) is the distribution of swimming speeds of the bacteria. ~cattercd spectra from motile E, Coli Klz bacteria have been investigated by laser light intensity correlation spectroscopy. [Z(K, t ) ] z is obtained from the data and its angula...
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Chemotactic signaling in Escherichia coli involves transmission of both negative and positive signals. In order to examine mechanisms of signal processing, behavioral responses to dual inputs have been measured by using photoactivable "caged" compounds, computer video analysis, and chemoreceptor deletion mutants. Signaling from Tar and Tsr, two receptors that sense amino acids and pH, was studi...
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The effect of bacterial motion on the diffusion of a molecule of high molecular weight is studied by observing the mixing of two streams of fluid in a microfluidic flow cell. We show that the presence of motile E. coli bacteria in one of the streams results in a marked increase in the effective diffusion coefficient of Dextran, which rises linearly with the concentration of bacteria from a base...
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ژورنال
عنوان ژورنال: Journal of General Microbiology
سال: 1973
ISSN: 0022-1287
DOI: 10.1099/00221287-78-2-287