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 188 for “"anaerobic conditions"”.
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The effects of bicarbonate and mineral surfaces on uranium immobilization under anaerobic conditions
For four decades, from 1940 through 1980, the U.S. Department of Energy (DoE) extensively mined and processed uranium at various sites. As a result, widespread uranium contamination exists in subsurface sediments and aquifers. In subsurface environments, uranium primarily exists as U(VI) or U(IV), …
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Biochemical and physiological changes in bovine sperm during extended incubation under aerobic and anaerobic conditions
… during extended incubations (storage) under conditions of either complete exclusion of oxygen from the diluent, reduced oxygen tension, normal atmospheric conditions or elevated exposure to reactive oxygen species. Velocities of bovine sperm in a medium containing glucose were found to be …
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Influence of dietary antioxidants on luminal nitrite chemistry under conditions simulating the gastro-oesophageal junction
… was also investigated under both aerobic and anaerobic conditions. These studies were performed in a newly designed closed bench-top model reproducing the chemical environment occurring at the human gastro-oesophageal junction. Each of the experiments was performed with and without NaSCN at …
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Doctoral Research Project : Sustainable production of bacterial polymers
… PLLA and PET, under marine aerobic and anaerobic conditions, involving AD and MEC-AD reactors. The results showcased promising marine biodegradability for P(3HO-co-3HD-co-3HDD), but anaerobic conditions posed a challenge. In contrast, P(3HB) demonstrated slower marine biodegradability …
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Investigation of the Iron Oxidation Kinetics in Mantua Reservoir
… when seasonal variations in the reservoir caused anaerobic conditions. The reduced iron then dissolved in the water and was used in the irrigation system, causing re-oxidation of the iron. The oxidized iron then precipitated out on the headstones causing the staining. The purpose of this …
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A cluster of two serine transfer RNA genes from Clostridium acetobutylicum P262
… In theory, metronidazole would be reduced under anaerobic conditions to a cytotoxic intermediate by C. acetobutylicum P262 electron transport genes or reductive enzymes cloned into a recombinant plasmid. This intermediate would kill the host E. coli FI9. One C. acetobutylicum P262 clone, pMETIOB, …
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Anaerobic transformations of Kepone by denitrifying bacteria
Anaerobic bacteria isolated from Kepone-contaminated sediment were screened for their ability to degrade Kepone under anaerobic conditions. The most extensive degradation was produced by denitrifying bacteria grown on benzoate-nitrate medium. In enrichment cultures, Kepone was transformed more …
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Fate of azo dyes in sludges
… mill were studied in sludges under aerobic and anaerobic conditions. The potential of the dyes to leach from landfills was also investigated using Toxicity Characteristic Leaching Procedure (TCLP) analysis. The vinyl sulfone group of the Reactive Black 5 dye appeared to enable the dye to sorb to …
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Land treatment of grape-processing effluents near Robertson, Western Cape
… Primary settling and treatment in aerobic and anaerobic lagoons typically precede disposal to land. Land treatment can effectively remove COD and also benefit the soil by increasing organic matter, cation exchange capacity and moisture retention capacity. Adverse effects can include …
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Manganese removal from an organic-laden surface water
… bottom. It is released from the sediments under anaerobic conditions. Total organic carbon levels ranging from 4.0 to 7.25 mg/L were noted with increasing depth. Plant profiles were developed to indicate the performance of the sedimentation and filtration units in reducing manganese …
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Ethanol inhibition of continuous anaerobic yeast growth
… glucose. Continuous culture techniques under anaerobic conditions (the medium was not deaerated) were used where high concentrations of ethanol were produced by the yeast itself. This was in contrast to previous studies in the literature where ethanol was added to the culture.
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Long-Chain Fatty Acids Promote Candida albicans Gut Colonization by Restructuring the Fungal Cell Surface
… Transcriptome analysis revealed that, under anaerobic conditions, oleic acid promoted the expression of several <em>C. albicans</em> transcription factors, which are known to positively regulate intestinal colonization. Furthermore, oleic acid induced the expression of a variety of adhesins …
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Oxidation of aqueous sulfides in the presence of manganese dioxide
… disappearance of sulfides under both aerobic and anaerobic conditions. The reactions are both pH dependent with the maximum rate occuring at pH 8.. By examining the products of the reaction, polysulfides, with x between 2 and 5) were found to be significant intermediates in both the aerobic and …
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Investigations into actinomycetes isolated from coastal environments, with a special emphasis on the genus Micromonospora
… environmental Micromonospora isolates grew under anaerobic conditions.
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The removal of perchlorate from waters by a membrane-immobilized biofilm
… Perchlorate (ClO4 -) is easily reduced under anaerobic conditions to harmless chloride (Cl-). In this system, the perchlorate-contaminated water is physically separated from the biofilm by the membrane. Perchlorate diffuses, without the need of external energy, to the degrading biofilm, …
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Characterization of Hpk2-Rrp2, two-component regulatory system in Treponema denticola
… in part, responses to the changing environmental conditions associated with the development of periodontal disease. The results presented demonstrate that tde1970 and tde1969 are conserved, universal among T. denticola isolates and transcribed as part of a 7 gene operon in a growth phase dependent …
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Microbial CR(VI) reduction in indigenous culture of bacteria: characterization and modelling
… revealed a wide diversity of CRBs isolated under anaerobic conditions than under aerobic conditions. The consortium was determined to be predominantly gram-positive. The Cr(VI) reducing component of the culture was determined to be predominantly facultative, consisting predominantly of Bacillus …
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The impact of bile and anaerobic stress on Listeria monocytogenes isolates
… barrier. In this study the effect of bile and anaerobic stress on L. monocytogenes was assessed. Bile has antimicrobial properties and it is one of the stressors that L. monocytogenes must overcome in the human gastrointestinal tract to establish infection. L. monocytogenes uses an enzyme, bile …
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