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 470 for “"Biofilms"”.
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Computational Modeling of Bacterial Biofilms
… drive the structural developments in growing biofilms. Our individual-based model incorporates the essential biophysical processes of cell growth and division, viscous drag, attractive-repulsive cell-surface interactions, attractive-repulsive cell-cell interactions and external forces and …
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Wireless Electrostimulation to Eradicate Bacterial Biofilms
<p>Bacterial biofilms can form on medical implants and cause serious device-associated infections that are incurable by conventional antibiotics because of high-level tolerance to antimicrobials. Common strategies for controlling device-associated infections, such as coating with antimicrobials and …
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Bacterial biofilms and biomineralisation on titanium
This study investigated bacterial interactions with titanium, and evaluated the use of Serratia biomineralisation to produce a hydroxyapatite (HA) coating on titanium. Adherence of Gram-positive Staphylococcus epidermidis and Streptococcus sanguinis and Gram-negative Serratia sp. NCIMB 40259 and …
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Neutrophil Responses to Mixed-Species Anaerobic Biofilms
Biofilms composed of anaerobic bacteria often result in persistent infections and chronic inflammation. Host immune cells have difficulties in clearing biofilm-related infections and this can result in unnecessary tissue damage due to the overproduction of proinflammatory mediators. The objective …
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Evolution and phenotypic diversification in serratia marcescens biofilms
… biofilm morphotype and not from the filamentous biofilms, leading to the hypothesis that there is a strong diversifying selection that is specific to the microcolony biofilms. To further explore how these variants were generated, molecular analyses revealed that exopolysaccharides and …
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Mathematical Modelling of Wrinkle Formation in Bacterial Biofilms
Biofilms are matrix-producing communities of bacterial cells that adhere to surfaces and adopt a multicellular lifestyle. As the predominant life-form of bacteria (estimates suggest that 99% of all bacteria exist in biofilm communities), biofilms play a crucial role in the Earth’s ecosystems, where …
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Bacterial adhesion and detachment from model mineralized biofilms
… also often found precipitated on pipe walls and biofilms, but the influence of its presence on the interaction between biofilms and pathogens is still unknown. The objective of this study is to determine the influence of calcium carbonate precipitates on pathogen adhesion to and detachment from …
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Combating biofilms and antibiotic resistance using synthetic biology
… a significant source of morbidity and mortality. Biofilms and antibiotic resistance pose challenges to our future ability to treat bacterial diseases with antibiotics (1). Bacteria frequently live in biofilms, which are surface-associated communities encased in a hydrated extracellular polymeric …
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Microbial community structure and nitrogen cycling in limestone biofilms
Biofilms inhabiting rock surfaces were of particular interest for this study, due to their ubiquity in central Texas and possible role in nitrogen cycling. Biofilm samples from an ornamental pond in Austin, Texas were collected over the course of two and a half years. Microscopic analysis indicated …
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3-D Computational Investigation of Viscoelastic Biofilms using GPUs
… multi-component phase field model of biofilms that captures this behavior, then use numerical simulations on GPUs to investigate the biofilm’s growth and its hydrodynamics properties.</p>
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Effect of iron and haemoglobin on Staphylococcus aureus biofilms
… and surgical site infections among others. Biofilms are bacterial aggregations embedded in an extracellular matrix with specific gene expression or metabolic networks different from their planktonic counterparts. Biofilms provide a chronic reservoir of infection due to a higher resistance to …
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Mathematical Modeling of Carbon and Light-Limited Algal Biofilms
… model of carbon and light limitation in algal biofilms was developed based on well-established fundamental descriptions of chemical, physical, and biological processes. The model considers carbon dioxide utilization and production from photosynthesis and respiration, diffusion of inorganic …
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Impact of Chloramination on the Development of Oligotrophic Biofilms
… development of laboratory-grown oligotrophic biofilms over a two-month period. Biofilm development and disinfection were realized in Center for Disease Control (CDC) reactor systems with PVC coupons as the substratum and groundwater as the seeding and growth nutrient. To compare biofilm …
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The Use of Metal and Metal Oxide Nanoparticles Against Biofilms
The persistence of biofilms in hospital settings are associated with Healthcare Associated Infections (HCAI), causing increased morbidity, mortality and healthcare costs. The resistance of biofilms against commonly used hospital disinfectants has been well reported. Metal and metal oxide …
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Controlling Bacterial Persister Cells and Biofilms by Synthetic Brominated Furanones
… by forming multicellular structures, known as biofilms, and by entering dormancy and forming persister cells. Both mechanisms allow bacteria to tolerate antibiotics at concentrations hundreds to thousands of times higher than the lethal dose for regular planktonic cells of the same genotype. …
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in vitro studie van Candida albicans en Streptococcus mutans biofilms
The importance and ubiquitous nature of biofilms have become generally recognized in microbiology. These sessile communities of microorganisms imbedded in an extracellular polymeric matrix on a surface are characterized by a high resistance to antimicrobial treatments. Also, their contribution to …
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