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 “"micro-organism"”.
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A microfabricated dielectrophoretic micro-organism concentrator
This project focuses on the development of a micro-organism concentrator. Pathogen detection, particularly MEMS based detection, is often limited by sample concentration. The proposed concentrator will interface with a pathogen detector. This type of pathogen concentrator can be useful for many …
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The impact of irrigation conditions on the spatial development of microbial colonies in bioheaps
… of the relationships between hydrodynamics and micro-organism-ore contacting and colonisation through an integrated study of microbiological and hydrological aspects of heap bioleaching within systems that mimic actual bio-heap environments.
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A novel bioactive peptide from the skin secretion of Hylarana nigrovittata
… of amphibians have been found to have antimicrobial and enzyme inhibitory effects. In order to identify a new peptide from the skin secretion of the frog, Hylarana nigrovittata, and test its functions, several experiments had been done. In this study, a novel peptide QUB-1704 was isolated …
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The effect of non-biological particulates on microbial cell disruption in a slurry bioreactor
… into the disruption of stationary-phase microbial cells in a stirred tank reactor when agitated in the presence of biologically inert solid particles in the absence of aeration. Applications of biological processes, where cells and solid particles are used, include bead mills, minerals …
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Batch test for measurement of ordinary heterotrophic organism active biomass in activated sludge mixed liquor
… possible t incorporate the behaviour of specific microorganism species - the mixed liquor in the activated sludge system contains a wide diversity of different micro organisim species, the mixed liquor in the activated sludge system contains a wide diversity of different micro organism species, …
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A novel two-component signal transduction system in propionibacterium acnes and its association with a putative extracellular signalling peptide
Propionibacterium acnes, a resident micro-organism of human skin, is thought to be involved in the development of inflammatory acne, which is an exclusive human disease affecting more than 80% of the whole population. Quorum sensing is the regulation of gene expression in response to cell density. …
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Stenotrophomonas maltophilia induzierte Endophthalmitis
Stenotrophomonas maltophilia, a micro-organism which colonises plastic material was isolated in only 10 known cases of postcataract surgery endophthalmitis (PE) world-wide. We present characteristics, treatment and outcome in 26 cases of PE caused by S. maltophilia contaminated rinsing solution …
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The microbial ecology of cow slurry in vermiculture beds
… to the interactions between E. fetida and the microflora of the substrate. Assessment of the chemical and microbiological changes in cow slurry stored under forced aeration, and subsequently in shallow trays, showed that neither method was suitable for the treatment of slurry. A comparison of …
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Design and Synthesis of Inhibitors of Mycobacterium tuberculosis Menaquinone D (Mtb MenD) as Potential Therapeutics for Tuberculosis (Tb)
… protein crystallography, enzyme kinetics and microbiology. Initially, a series of inhibitor candidates derived from the natural substrate isochorismate were synthesized. Unexpectedly, these were shown by X-ray crystallography to bind to a previously unreported allosteric regulation site on …
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Batch and continuous fermentation methods for the production of dextransucrase
… various experimental techniques employed. The micro-organism Leuconostoc mesenteroides NRRL B512 (F) secretes dextransucrase in the presence of an inducer, sucrose, this being the only known inducer of the enzyme. Dextransucrase is a growth related product and a series of fed-batch …
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The effect of the type, size, position and recycle ratio of the anoxic zone on low F/M filament bulking in nitrogen removal activated sludge systems
… (DSVI < 100 rnl/g) by controlling filamentous organism proliferation would allow increased daily flow and loads by up to 100 on existing activated sludge wastewater treatment plants. From the two surveys, Blackbeard et al. (1986,1988) found that mainly six filamentous organisms tended to …
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Aerobic biological treatment of a colloidal wastewater
… oxygen demand, COD basis. Four different food to micro-organism ratios were used at each colloidal percentage. Measurements of filtered and settled CID, oxygen uptake and mixed liquor suspended solids, MSS, were used to monitor waste stabilization. Continuous flow type experiments were conducted …
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Assessing microbial quality of beer heat treated by flash and tunnel pasteurization.
… This process happens in the presence of the only micro-organism that is allowed which is Saccharomyces cerevisiae which ferments the small sugars to produce alcohol, carbon dioxide and energy. A large percentage of microbial contamination occurs when the yeast strains are introduced into the …
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The identification and recording of potential biological hazards in ancient monuments for inclusion in HBIM within refurbishment and demolition in ancient castles
Background - Owing to the role that micro-organisms play, it can be seen that the need to comprehend the composition and functionality of complex microbial groups, within ancient structures is important as to ascertain if it is dangerous to health. This research aims to demonstrate the possibility …
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Gene expression patterns of encapsulated microbial cells
… are drawn for the use of encapsulated micro-organism as sensors and effectors, and for the persister state of such organisms. Ordinarily Gene Ontology (GO) enrichment analysis is subject to an arbitrary threshold for defining significance of enriched classes. In this paper, we consider …
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Collective dynamics of evolving populations and their strategies with application to medicine
… their hosts, game theory and the social life of micro-organisms, a novel mechanism enhancing cooperation in evolutionary game theory, and evolutionary robust strategies for delivery of antibiotics. In the first project, starting with stochastic rate equations for the fundamental interactions …
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Enhanced bioethanol fermentation from mixed xylose and glucose using free and immobilized cultures: mathematical model and experimental observation
… bagasse. To date, no suitable wild type organisms can concomitantly ferment both glucose and xylose to ethanol efficiently. Options to address the co-fermentation of glucose and xylose include genetic modification of the selected microorganism to include both pathways - limitation in the …
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Early pathogenesis of Yersinia ruckeri infections in rainbow trout (Oncorhynchus mykiss, Walbaum)
… General Introduction gives an overview of the micro-organism, Y. ruckeri, and the disease it causes. From this review it is clear that only little information is available about the pathogenesis of Y. ruckeri. Only recently, the mechanisms by which the pathogen causes disease have started to be …