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 “"Filamentous bacteria"”.
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Detection of filamentous bacteria in activated sludge
Attempts were made to isolate the filamentous bacteria responsible for bulking at Goudkoppies activated sludge plant in Johannesburg, South Africa, in order to allow fluorescent antibody against these microorganisms to be produced and to facilitate and simplify their identification. Of the …
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Temporal biomass density and filamentous bacteria effects on secondary settling
… settling problems has focused on the role of filamentous bacteria, and also factors such as floc size and shape. The effects of variable biomass density on settleability of biosolids produced in full scale activated sludge wastewater treatment systems has been recently been demonstrated, and …
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Molecular characterization of filamentous bacteria isolated from full-scale activated sludge processes
Submitted in fulfilment of the requirements for the Degree of Master of Technology: Biotechnology, Durban University of Technology, Durban, South Africa, 2007.
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Investigation of the microbial populations in the activated sludge of the Hoechst-Celanese wastewater treatment plant
… denitrifiers, sulfate-reducers, protozoa and filamentous bacteria were enumerated. Variations in microbial populations were compared with influent and effluent constituent concentrations, and with aeration basin characteristics, such as dissolved oxygen and F/M ratio, to determine whether any …
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Chemical Control and Understanding of Horizontal Gene Transfers, Drug-Resistance Development, and Filament and Biofilm Formation
… than without antibiotics, what phenotypes of bacteria form in an antibiotic-promoted biofilm, and what different biofilm compositions and structures are caused by the presence of antibiotics. Among other effects, antibiotics can cause bacteria to form filaments of living bacteria. Here, we …
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TREATMENT OF PETROLEUM REFINERY WASTEWATER IN AN INNOVATIVE SEQUENCING BATCH REACTOR
… months of operation, there was an overgrowth of filamentous bacteria inside the NOSBR reactor, while the morphological characteristics of the sludge inside the TSSBR reactor indicated a better and homogenous growth of filamentous bacteria. TSSBR system proves to be more efficient than NOSBR by …
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Molecular characterization of Flavobacterium spp. isolated from Rainbow trout (Oncorhynchus mykiss) farmed in Southern Africa and development of a PCR-based tool for differentiating between isolates
Bacterial fish diseases caused by yellow-pigmented, filamentous bacteria of the genus Flavobacterium are among those that lead to significant losses in the international aquaculture industry. An increasing number of Flavobacterium spp. have been isolated in association with diseased fish within the …
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Extracellular Contractile Injection Systems (eCIS) - Characterization of Conserved Phage Tail-like Structures in Streptomyces
… bacteriophage tail-like structures produced by bacteria that have been implicated in diverse interactions with eukaryotic cells. Despite their distribution across many bacteria and archaea they have been relatively understudied and are often misclassified as other secretion systems or tailocins. …
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The streptomyces cytoskeletal protein (Scy) is a key component of the tip organising centre for polarized growth in streptomyces coelicolor
… model organisms in the phylum of the Actinobacteria. Streptomyces bacteria are soil dwelling filamentous bacteria with a complex life cycle consisting of multigenomic hyphae that then form unicellular spores. Bacterial cell shape determination has been influenced heavily by the discovery …
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Genome Mining for Actinomycete Biosynthetic Gene Clusters
… Streptomyces and allied genera of Gram-positive filamentous bacteria house a rich and previously underestimated repertoire of gene clusters for biosynthesis of specialised metabolites, including antibiotics, immunosuppressants and anticancer compounds. Many of these clusters remain …
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From Flare to Repair: Commensal Bacteria's Influence on Inflammation and Wound Healing
… homeostasis. However, it remains unclear how bacterial dysbiosis drives inflammation beyond the gut, how the microbiota influences the central nervous system (CNS) where microbes are absent, and if there are specific commensals that may attenuate inflammation. To that end, Chapter 3 …
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Establishment and regulation of polar growth in Streptomyces
… growth is found in the branching hyphae of the filamentous bacteria Streptomyces, and it is clear that the essential coiled-coil protein DivIVA, which forms part of a tip-organising, multiprotein polarisome complex, plays a key role in the control of cell polarity, apical growth and hyphal …
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A sponge-based moving bed bioreactor for micropollutant removal from municipal wastewater
… cause for the severe fouling. The overgrowth of filamentous bacteria could also been deemed a factor that accelerated the membrane fouling rate. The total membrane resistance was mainly attributed to the deposited cake layer (76.5%), followed by the pore blocking (12.0%), clean membrane …
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Conservation Of The Intracellular Bacterial Community Pathogenic Pathway In Urinary Tract Infection
… in which they invade and form intracellular bacterial communities: IBCs) within bladder facet cells. Type 1 pili, adhesive fimbriae, are necessary for UPEC binding and invasion of urothelial cells and formation of IBCs. UPEC ultimately disperse from the IBC, many with filamentous morphology, …
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Modulation of Obesity and its Sequelae by Microbiome/Immune System Interactions
… particular, we addressed the role of Segmented Filamentous Bacteria (SFB), a specific constituent of the intestinal microbiota with defined immunostimulatory properties, in the development and maintenance of obesity and in the progression of a particular sequelum of obesity, non-alcoholic …
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The effect of different sludge pretreatment methods on mitigation of anaerobic digester foaming
In this study, waste activated sludge obtained from two full-scale treatment plants with foaming issues was pretreated with acid/alkali treatment, acid-phase fermentation, thermal treatment, sonication, and metal salt treatment to investigate their effect on foam mitigation. The major foam forming …
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Mineralogy, geochemistry and health impacts of earth materials consumed by humans in Vhembe District, Limpopo Province, South Africa
… (CEC), textures and occurrence of beneficial bacteria in the samples. Colour ranged from red, yellow to dark grey through various shades of brown. The pH of the geophagic materials ranges from 4.30 to I· 7.90. The values obtained for EC ranges from 8.22 µSiem to 652 µSiem while CEC ranges from …
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Sedimentary lipids as indicators of depositional conditions in the coastal Peruvian upwelling regime
… of Thioploca, a genus of sulfur-oxidizing bacteria, on organic compound distributions in upwelling regime sediments. The potential of the alkenone-Uk37 as a sedimentary marker for El Nino/Southern Oscillation (ENSO) events was assessed by comparing the historical ENSO record with detailed …