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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 11 of 11 for “"Surface Motility"”.
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Effect of Surface Chemistry and Young's Modulus on the Surface Motility of the Bacterium Pseudomonas Aeruginosa
This study demonstrates that the surface motility of the bacterium Pseudomonas aeruginosa is dependent on the surface chemistry of the underlying substrate. In particular, cells on hydrophobic polydimethylsiloxane (PDMS) have a speed that is on average 38% greater than on hydrophilic PDMS. These …
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Assessment of motility and hemolytic activity in clinical isolates of Acinetobacter baumannii from University of Kentucky hospital, Lexington, KY
… human disease, such as hemolytic activity and surface motility. The aim of this study was to determine the presence of these two virulent traits in clinical isolates. Forty-eight clinical isolates were recovered from University of Kentucky hospital in Lexington, KY. No hemolytic activity was …
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The Role of CheV in S. typhimurium Chemotaxis
… to serine and its ability to accomplish surface motility. My results also indicate that overexpression of the cheV gene disrupts S. typhimurium's swarming ability, as well as, S. typhimurium's ability to sense/respond to serine and S. typhimurium's ability to accomplish surface motility. …
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The Effect of Topography on Surface Behavior of Pseudomonas aeruginosa
… and 2) study the mechanism(s) by which surface topography hinders biofilm formation. The robustness of a topographical coating comprised of an array of silica particles is improved by the introduction of silica bridges through a sol-gel reaction. To study the mechanism(s), specifically, …
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Investigation of Pantoea stewartii Quorum-Sensing Controlled Regulators and Genes Important for Infection of Corn
… factors of P. stewartii, capsule production and surface motility. However, the function and integration of EsaR downstream targets in P. stewartii were still largely undefined. Moreover, only a draft genome of a reference strain of P. stewartii was publicly available for researchers, limiting …
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Effect of Aligned Nanoscale Surface Structures on Microbial Adhesion
… dollars. Studies have found that micro/nanoscale surface topography can significantly alter (i.e., promote or hinder) the process of biofilm formation. The formation of biofilm starts with planktonic microbes attach to the surface. To further understand the biophysical underpinning of this …
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Understanding PilB, The Type IV Pilus (T4P) Assembly ATPase
… (T4P) is a dynamic long thin fiber found on the surface of many bacterial groups. T4P is a versatile nanomachine; it plays many important roles such as for surface attachment, virulence factor, and surface motility apparatus. This research focuses on understanding the kinetics of PilB, the T4P …
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Investigating the Roles of the Stk Locus in Development, Motility and Exopolysaccharide Production in Myxococcus Xanthus
… cycle, displays a type IV pili (TFP) mediated surface motility known as social (S) gliding. Beside the polarly localized TFP, the fibril or extracellular polysaccharide (EPS) is also required for S-motility to function. It is proposed that S-motility, along with the related bacterial twitching …
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Regulation of Exopolysaccharide Production in Myxococcus Xanthus
The surface gliding motility of Myxococcus xanthus is required for a multicellular developmental process initiated by unfavorable growth conditions. One form of the M. xanthus surface motility, social (S) gliding, is mediated by the extension and retraction of polarly localized type IV pili (Tfp). …
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Biosynthesis of Nucleotide Sugar Monomers for Exopolysaccharide Production in Myxococcus Xanthus
Myxococcus xanthus displays social (S) motility, a form of surface motility that is key to the multicellular behaviors of this organism. S motility requires two cellular structures: type IV pili (TFP) and exopolysaccharides (EPS). Previous studies have shown that M. xanthus does not use glucose or …
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Investigation of the quorum-sensing regulon in the corn pathogen Pantoea stewartii
… responses, capsule & cell wall production, surface motility & adhesion and stress response. In Chapter Five, the role of two QS regulated genes, dkgA (encoding 2, 5-diketo-D-gluconate) and lrhA (encoding a repressor of chemotaxis, adhesion and motility), in plant virulence were examined. …