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 18 of 18 for “"microaerobic"”.
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Microaerobic requirements of camplobacter species and related organisms
A novel microaerobic incubator in which oxygen, carbon dioxide, hydrogen and nitrogen can be combined at different concentrations was used to investigate the gaseous requirements of Campylobacter species and Arcobacter species. Optimum gaseous incubation conditions were identified for all test …
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The Kinetics, Biochemical Patterns, and Microbial Ecology in Multiredox (Anoxic, Microaerobic, Aerobic) Activated Sludge Systems Treating BTX Containing Wastewater
… were studied under anoxic (denitrifying), anoxic/microaerobic/aerobic, and anoxic/microaerobic conditions in activated sludge sequencing batch reactors. The studies showed that toluene and m-xylene were denitrified via benzoyl-CoA reductase. Although benzene, o-, and p-xylene were recalcitrant …
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Identification et caractérisation de bactériocines produites par deux bactéries lactiques (Enterococcus faecium CWBI-B1430 et Enterococcus mundtii CWBI-B1431) isolées à partir de fromages frais artisanaux péruviens
… (25, 30 and 37°C) and oxygen level (anaerobic, microaerobic and aerobic). The conditions for maximizing the production of bacteriocins are : initial pH of 7.0, at 37 °C, and microaerobic conditions for CWBI-B1430 strain; initial pH of 6.5, at 37 °C, and an aerobic condition for CWBI-B1431. The …
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A microbiological and molecular study of campylobacter and related species isolated from ostriches (Struthio camelus)
… and incubation at 37 ºC in a hydrogen-enhanced microaerobic atmosphere (Lastovica, 2006). The isolates were identified as C. jejuni subsp. jejuni. The multiplex PCR of Neubauer and Hess (2006) was applied to some of these isolates. A panel of isolates consisting of C. jejuni subsp. jejuni, C. …
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NITROGEN METABOLISM AND IRON REDUCTION IN AQUASPIRILLUM MAGNETOTACTICUM (NITRATE, FIXATION, MAGNETIC BACTERIUM)
<p>Aquaspirillum magnetotacticum strain MS-1 grew microaerobically but not anaerobically with NO(,3)('-) or NH(,4)('+) as the sole nitrogen source. Cell yields varied directly with NO(,3)('-) concentration under microaerobic conditions. Products of NO(,3)('-) reduction by growing cells included …
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Molecular biogeochemistry of modern and ancient marine microbes
… rocks are consistent with the persistence of microaerobic surface ocean environments long before the initial oxygenation of the atmosphere. In the second part, using Prochlorococcus (a marine cyanobacterium that is the most abundant primary producer on earth today) as a model system, we …
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Microbial Growth On Anthropogenic Compounds By Reductive Dehalogenation Or Oxidation
… was isolated that could oxidize VC at microaerobic levels, perhaps partially explaining the observed lack of mass balance. Growth was monitored visually and increased with the decrease in VC concentration. From the sediment microcosms, an enrichment culture was developed, with one …
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Molecular Biogeochemistry of modern and ancient marine microbes
… rocks are consistent with the persistence of microaerobic surface ocean environments long before the initial oxygenation of the atmosphere. In the second part, using Prochlorococcus (a marine cyanobacterium that is the most abundant primary producer on earth today) as a model system, we …
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Structural and Functional Characterization of Cyanoglobin: A Peripheral Membrane Hemoglobin in Nostoc commune UTEX 584 (Cyanobacteria)
… oxidase complex in Nostoc commune UTEX 584 under microaerobic conditions, when nitrogen fixation, and thus ATP demand, is maximal.
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The electron transport chains of Neisseria meningitidis
… in cytochrome c5 exhibits a growth defect under microaerobic conditions in the presence of nitrite. The mutant can not reduce nitrite to nitric oxide although AniA is expressed normally. A growth defect during high cell density culture under aerobic conditions suggests that cytochrome c5 is also …
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Isolation, growth and epidemiology of campylobacter jejuni / coli
… and 1 - 10% CO2 facilitate growth. Satisfactory microaerobic conditions were produced by the evacuation-replacement technique and gas generating envelopes but not by candle jars. A biotyping scheme has been developed which differentiates Campylobacter spp. and is useful for epidemiological …
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Microbial Ecology of Subsurface Oil Sands Deposits in Northern Alberta, Canada
… Microcosms were established under aerobic, microaerobic and anaerobic atmospheres at reservoir (8°C), mesophilic (33°C) and thermophilic (60°C) temperatures. Results indicate that the predominant community members remained similar to the controls; however, some microcosms incubated at 60°C …
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Periplasmic determinants of virulence in Salmonella enterica
… that although S. typhimurium passes through the microaerobic, shifting to anaerobic, conditions of the intestine, and it is capable of respiring anaerobically, it only grows in the presence of oxygen in the mouse host. When Salmonella passes from the gut to the systemic environment, it encounters …
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Optimization of Phosphorus Removal and Mineral Characterization in Aerated Anaerobic Digestate with Divalent Cation Addition
… 20 percent total COD removal across the pilot in microaerobic conditions. The chemical equilibrium model Visual MINTEQ was also explored to determine the effects of pH, temperature, chemical choice and dose on minerology. A validated model could then be used to predict scaling potential and …
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Enhanced bioethanol fermentation from mixed xylose and glucose using free and immobilized cultures: mathematical model and experimental observation
… conversion by P. stipitis is optimum under microaerobic conditions. Therefore, oxygen was sparged into the second P. stipitis stage only. The following components were carried out in this project to improve the kinetic model and to find accurate kinetic data in the selected process of the …
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Engineering geobacillus thermoglucosidasius for efficient production of fuels and chemicals
… However, strains were unable to grow under microaerobic conditions. Growth of 95A1 was then recovered by serial adaptation of the strain in the presence of acetate. The evolved strain of 95A1 was able to efficiently produce ethanol during growth on glucose or cellobiose. Genome sequencing …
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An exploratory study of Helicobacter suis control strategies
… against nine H. suis isolates. After 48h microaerobic incubation, minimal inhibitory concentrations (MICs) were determined by software-assisted calculation of bacterial growth. Only for enrofloxacin a clear bimodal distribution of MICs was demonstrated, indicating acquired resistance in …
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A novel semi-passive process for sulphate removal and elemental sulphur recovery centred on a hybrid linear flow channel reactor
… on the development of discrete anaerobic and microaerobic zones, in the bulk liquid and at the airliquid interface, that facilitate sulphate reduction and partial sulphide oxidation, respectively. In the LFCR these environments are established as a result of the hydrodynamic properties …