Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"flagellated bacteria"”.
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Investigation of the Roles of CheD in the Bacillus Subtilis Chemotactic Signal Transduction
… chemotaxis signal transduction system allows flagellated bacteria to sense their surrounding chemical environment and move towards more favorable conditions. The attractant signals can be sensed by transmembrane chemoreceptors, and then transmitted to the histidine kinase CheA. Once activated, …
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Determinants Influencing Polar Flagellar Biosynthesis and Cell Division in Campylobacter jejuni
… jejuni is a worldwide leading cause of bacterial gastrointestinal disease. The natural habitat of this organism is the gastrointestinal tracts of warm-blooded animals, especially poultry, where the bacterium promotoes a harmless commensal colonization. The abundance of C. jejuni in …
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Investigation of the roles of CheD in the Bacillus subtilis chemotactic signal transduction
… chemotaxis signal transduction system allows flagellated bacteria to sense their surrounding chemical environment and move towards more favorable conditions. The attractant signals can be sensed by transmembrane chemoreceptors, and then transmitted to the histidine kinase CheA. Once activated, …
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Tricks and tips for faster small-scale swimming: Complex fluids and elasticity
… damping. In Chapter 5 we consider peritrichously flagellated bacteria, such as Escherichia coli. The rotation of each motor is transmitted to a flexible rod called the hook which in turns transmits it to a helical filament, leading to swimming. The motors are randomly distributed over the body of …
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Geometry and Hydrodynamics of Swimming with a Bundle of Bacterial Flagella
… the surface of a Paramecium. On the other hand, bacteria are equipped with corkscrew-shaped flagella, which they can rotate rigidly in viscous fluids to generate forward motion. In this thesis, we consider the role played by the number of flagella in the swimming of multi-flagellated bacteria, …
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An Experimentally-validated Agent-based Model to Study the Emergent Behavior of Bacterial Communities
Swimming bacteria are ubiquitous in aqueous environments ranging from oceans to fluidic environments within a living host. Furthermore, engineered bacteria are being increasingly utilized for a host of applications including environmental bioremediation, biosensing, and for the treatment of …
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Characterization of swimming motility in a marine unicellular cyanobacterium
… entirely random, consistent with the absence of bacterial flagella. Synechococcus motility resembled flagellar-mediated motility in that thrust (forward motion) was accompanied by torque (cell rotation) as demonstrated by i) dividing cells which swam with the daughter cells at an angle, ii) …
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Bacteria in shear flow
Bacteria are ubiquitous and play a critical role in many contexts. Their environment is nearly always dynamic due to the prevalence of fluid flow: creeping flow in soil, highly sheared flow in bodily conduits, and turbulent flow in rivers, streams, lakes, and oceans, as well as anthropogenic …
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Active cellular flows: biological networks, cytoplasmic streaming and swimming bacteria
… fluid flows outside cells and focuses on bacterial locomotion. We begin by examining the fluid dynamics of rotating helical filaments, an archetypal low-Re propulsion strategy. In a classical 1976 paper, Lighthill calculated the ‘optimal’ resistance coefficients in a local resistive-force …
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Effect of Spatial Organization and Population Ratios on the Dynamics of Quorum Sensing and Quorum Quenching in Bacteria Communities
… is a type of microbial communication used by bacteria to coordinate their behavior based on population density, regulating complex processes like biofilm formation and virulence, among other behaviors. Quorum quenching (QQ), on the other hand, disrupts this communication, usually by …