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 20 of 137 for “"Growth phase"”.
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Identification and isolation of growth-phase specific proteins of mycobacteria
The aim of this project was to identify growth phase-specific heat shock proteins of Mycobacterium smegmatis LR222. A growth curve was constructed using the ATP assay. This method was shown by B. A. Ntolosi to be the most accurate indicator of when the organism entered the various phases of growth. …
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Growth, phase transformation, and self-assembly in iron oxide and uranium oxide nanostructures
… fundamental mechanisms that drive nanoparticle growth, phase transformation, and assembly into larger structures are still shrouded in mystery. Considerable progress has been made in elucidating these mechanisms in the past several decades, and a comprehensive picture of nanoparticle growth is …
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Crystal Growth, Phase Transformations, and Electrical Properties of Metastable Gallium Antimonide-Germanium Alloys
… compositions across the GaSb-Ge pseudobinary phase diagram. The alloys transformed to the equilibrium state through a continuous series of metastable states at a rate limited by diffusion. Ion bombardment during growth had a strong influence on the transformation rate kinetics; however, no …
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The Mycobacterium smegmatis "Proteome" : effects of growth phase on total protein synthesis and on the response to heat shock
… the phenotype of the mycobacterial stationary phase, the effect of growth phase of Mycobacterium smegmatis on total protein synthesis and on the heat shock response was investigated. De novo protein synthesis was monitored by labelling with 35 [S]methionine and the protein expression profiles …
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A Framework for Controlling Opportunistic Pathogens in Premise Plumbing Considerate of Disinfectant Concentration x Time (CT) and Shifts in Microbial Growth Phase
… line is sometimes insufficient to suppress OP growth. Conditions encountered in premise plumbing can further diminish disinfectant in water after it crosses the property line. This dissertation examines how multiple factors at play in drinking water distribution systems and premise plumbing …
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Cell wall metabolite levels as a function of the growth phase in Staphylococcus aureus and library screening for synergistic combinations of FDA approved drugs against methicillin resistant S. aureus
… intermediate involved in CWB on a reverse-phase analytical column. In the first part of this study, we examined how CWB intermediates and energy-rich nucleotide (ATP, etc.) levels change over the whole growth curve of S. aureus, from senescence to logarithmic growth and back to senescence. …
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Immunomodulatory effects of lactic acid bacteria on human intestinal epithelial cells and macrophages in the context of a pro-inflammatory challenge
… acid bacteria vary with strain and may vary with growth phase and medium. The ability of different lactobacilli strains (Lactobacillus helveticus R0052, L. rhamnosus R0011, L. rhamnosus GG) at different growth phases to modulate macrophage and intestinal epithelial cell cytokine production …
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The characterization of Clostridium beijerinckii NRRL B592 cells transformed with plasmids containing the butanol-production genes under the control of constitutive promoters
… earlier start of butanol production during the growth phase than is the case with the wild-type cells. The aldehyde dehydrogenase from C. beijerinckii NRRL B593 (ald) and alcohol dehydrogenase from C. beijerinckii NRRL B592 (adhA) were placed under the control of the promoter from the …
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A study of holding conditions, feed ration, and algal foods for the captive care of freshwater mussels
… had the greatest amount of energy available for growth, reproduction, and body condition in captivity at 3.4 mg dry weight L⁻¹). The gross composition (protein, carbohydrate (CHO), and lipid) of four algae (Bracteacoccus grandis, Neochloris oleoabundans, and Scenedesmus quadricauda, and …
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<em>Actinobacillus pleuropneumoniae</em> ApxI and ApxII Toxin Regulation
… toxin production was examined in relation to growth phase, quorum sensing, and oxygen tension. Changes in the hemolytic activity, the production of extracellular toxin and/or levels of mRNA were measured. It was found that ApxII was regulated by growth-phase, with maximal production occurring …
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A study of the effect of environmental lighting on growth, reproduction and behavior in turkeys (Meleagris gallopavo)
… the effect of environmental lighting on growth, reproduction and behavior in turkeys. During the growth phase a Large White and a Medium White line of turkeys were reared on an intermittent (2L:2D) or a diurnal (12L:l2D) light regimens under white, red (650 nm) or blue (450 nm) light …
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Molecular biology studies on the extracellular serine proteases of Vibrio alginolyticus
… and a collagenase during the stationary growth phase. The aim of this study was to investigate alkaline serine protease production by this organism, and to attempt the cloning and expression of a V.alginolyticus protease gene in Escherichia coli.
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Application of hydrogen peroxide as brown tide bloom control agent
… in the field and finally, the effects of algal growth phase and biomass on treatment efficacy were tested. The kinetics of H_2O_2 decomposition were examined in parallel. The dissertation discusses the possible action of H_2O_2 on algal cells based on cell wall structure, cell size, growth phase …
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Trihalomethane-forming potential of algal extracellular products and biomass
… and harvested on several days throughout the growth cycle. Media filtrates and cell suspensions were analyzed for total organic carbon and chloroform produced after chlorination. Pure solutions of representative algal extracellular metabolites were analyzed in a similar manner. The …
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Transcriptional profiles of cumulus-oocyte complexes related to developmental competence in bovine oocytes
… abundance from fully grown versus growing phase oocytes and surrounding CC. Using cow ovaries from an abattoir, COC were collected from follicles ranging from 3 to 8 mm in diameter. Cumulus-oocyte complexes were incubated in the supravital stain brilliant cresyl blue (BCB) as a means of …
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Cell physiology based pharmacodynamic modeling of antimicrobial drug combinations
Mathematical models of bacterial growth have been successfully applied to study the relationship between antibiotic drug exposure and the antibacterial effect. Since these models typically lack a representation of cellular processes and cell physiology, the mechanistic integration of drug action is …
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The osmotic stress response of ale and lager yeast
… investigated but was observed to be strain, growth phase and solute dependent, reflecting inherent genetic differences in the management of this stress in all cases. It has been postulated that the yeast vacuole plays a central role in the maintenance of physiological activity during osmotic …
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Molecular investigation of the influence of environmental factors and subinhibitory antibiotic concentrations on the biofilm formation in Staphylococcus epidermidis
… that the S. epidermidis biofilm formation is growth phase dependent with a maximum expression in the late logarithmic and early stationary growth phase. The optimal expression was recorded at 42 °C at a neutral pH ranging from 7.0 to 7.5. The glucose content of the medium was found to be …
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The role of cross-kingdom biofilms in the epiphytic growth of Zymoseptoria tritici
… that fungal nutrient acquisition during this growth phase is facilitated by interaction with bacteria found on the leaf surface. Many bacteria that inhabit the leaf surface (the ‘phylloplane’) are known to secrete metabolites, such as enzymes and surfactants which improve nutrient …
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The role of cross-kingdom biofilms in the epiphytic growth of Zymoseptoria tritici
… that fungal nutrient acquisition during this growth phase is facilitated by interaction with bacteria found on the leaf surface. Many bacteria that inhabit the leaf surface (the ‘phylloplane’) are known to secrete metabolites, such as enzymes and surfactants which improve nutrient …
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