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Showing 1 to 20 of 5319 for “"bacteria"”.
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Light-sensing in bacteria
… role in regulating lifestyle changes in bacteria. My research focused on a number of different light-sensing systems in different bacteria: PpaA in Rhodobacter sphaeroides, PixD-PixE in Synechocystis sp. PCC, and the known light-receptors in Rhodospirillum centenum. PpaA from R. …
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Steroid Hydroxylation by Bacteria
Made available in DSpace on 2014-12-09T17:35:11Z (GMT). No. of bitstreams: 1 6503698.pdf: 4898302 bytes, checksum: 2e5d4e8e52da9afded3a65bff0943788 (MD5) Previous issue date: 1964
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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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Bacteria mediated heat sinks
… water with Pseudomonas syringae, a gram-negative bacteria. Pseudomonas syringae is known as an ice-nucleating agent that can reduce the amount of supercooling needed to nucleate ice. Experiments using the bacteria were observed to stabilize a solid-liquid interface faster than the control …
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Geobiology of marine magnetotactic bacteria
Magnetotactic bacteria (MTB) biomineralize intracellular membrane-bound crystals of magnetite (Fe3O4) or greigite (Fe3S4), and are abundant in the suboxic to anoxic zones of stratified marine environments worldwide. Their population densities (up to 105 cells ml−1) and high intracellular iron …
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Bacteria At Oil-Water Interfaces
Bacteria are active colloids whose collective motion is studied in the context of non-equilibrium statistical mechanics. Bacteria can also become trapped at or near fluid interfaces, impacting bacteria fate and interface mechanics. Here I study bacteria near hexadecane-water interfaces. I …
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Phylogenetic Relationships of Thermophilic Bacteria
There are two lines of prokaryotic descent--the eubacteria and the archaebacteria. The phylogenetic relationships of several new isolates of extremely thermophilic bacteria have been determined and used to gain a deeper understanding of the role of thermophilic bacteria in early evolution. The 16S …
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Geobiology of marine magnetotactic bacteria
Magnetotactic bacteria (MTB) biomineralize intracellular membrane-bound crystals of magnetite (Fe3O4) or greigite (Fe3S4), and are abundant in the suboxic to anoxic zones of stratified marine environments worldwide. Their population densities (up to 105 cells ml-1) and high intracellular iron …
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Sanitizer efficacy towards attached bacteria
… efficacy of in use concentrations toward bacteria attached to gasket materials, (2) examine attachment on rubber versus teflon gaskets, (3) examine different methods of enumeration, (4) compare kill of attached bacteria to suspension tests, (5) determine the minimum inhibitory …
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Ancestral Genome Reconstruction in Bacteria
… genome reconstruction system (REGEN) for bacteria. It is the first bacterial genome reconstruction tool that focuses on ancestral state reconstruction at the genome scale instead of the gene scale. It not only reconstructs ancestral gene content and contiguous gene runs using either a …
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The nutritional role of endosymbiotic bacteria in animal-bacteria symbioses : Solemya velum, a case study
… interactions occurring between endosymbiotic bacteria and the host in animal-bacteria symbioses were investigated using the endosymbiont-containing protobranch clam, Solemya velum, as a general model. C, N, and S stable isotope compositions were investigated in tissues of S. velum; C and N …
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Investigating Hfq-Mrna Interactions In Bacteria
<p>Regulatory RNAs (sRNAs) are essential for bacteria to thrive in diverse environments and they also play a key role in virulence [11]. Trans-sRNAs affect the stability and/or translation of their target mRNAs through complementary base-pairing. The base-pairing interaction is not perfect and …
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Resolving bacteria with the coulter counter
Present methods of counting and sizing of bacteria arc usually tedious and often have low statistical validity. The objective of this thesis was to investigate the feasibility of counting and sizing of bacteria with the Coulter Counter and to evaluate orifices which were prepared in this …
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Natural Product Biosynthesis In Uncultured Bacteria
… gram of soil can contain thousands of unique bacterial species, only a small fraction of which is regularly cultured in the laboratory. Although the fermentation of cultured microorganisms has provided access to numerous bioactive secondary metabolites, with these same methods it is not …
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Engineering Signal Transduction Pathways in Bacteria
Veränderte Proteine sind ein wertvolles Handwerkzeug, sowohl in der Grundlagenforschung als auch in der Industrie. Ein nächster Schritt wäre Veränderungen in biologischen Stoffwechselwegen, z.B. in der Signalweiterleitung, vorzunehmen. Dieses könnte die Grundlage für viele Anwendungen sein, z.B. in …
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Effect of Heavy Metals on Bacteria
… and ease of usage. The growth rates of the bacteria and viable counts were obtained via light scattering. Bacteria were grown on rich media (LB broth) as well as mineral M9 media supplemented with and without casamino acids and growth rates were compared. Another objective in this study was …
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