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 34 for “"bacterial attachment"”.
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Assembly and post-assembly manipulation of polyelectrolyte multilayers for control of bacterial attachment and viability
… the ability of substrata to resist bacteria attachment or act as contact-killing antimicrobials. In the first study, by varying the pH of assembly, we developed PEMs of identical chemical composition (polyallylamine hydrochloride (PAH) and polyacrylic acid (PAA)) with distinct mechanical …
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Probing topographical influences on biofilm formation using dynamic-mask multiphoton lithography
… and heterogeneity of the biofilm mode of bacterial existence has been widely appreciated. Biofilms have persisted for billions of years as social communities of cells aggregated and attached on surfaces, and today they are both necessary and harmful within the human body and our …
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Characterization of the Gifsy-1 Phage Excisionase
The Gifsy-1 phage is a temperate bacterial virus that infects its host, Salmonella enterica serovar Typhimurium. During lysogeny, the phage integrates site-specifically into a single bacterial attachment sequence in the Salmonella chromosome. The reaction involves recombination between the phage …
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Biofilm Formation by Common Dairy Sporeformers on Native and Modified Stainless Steel Surfaces
… Stainless Steel (SS) and to study the extent of bacterial adhesion in order to develop a surface that is least vulnerable to bacterial attachment, thus reducing the formation of biofilms. The first part of the study analyzed the adhesion tendency of aerobic sporeforming bacteria on native and …
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Effect of Aligned Nanoscale Surface Structures on Microbial Adhesion
… techniques. The effect of surface topography on bacterial near-surface motility was studied. The experimental results showed that the bacterial attachment and near-surface motion can be greatly impacted by surface topography. Furthermore, the finding was applied to ureteral stents. The results …
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ROLE OF FORMIN FHOD1 IN THE ACTIN PEDESTAL FORMATION
… causes polymerization of actin at the site of bacterial attachment, referred to as ‘actin pedestals’. Actin polymerization in the pedestal is believed to be regulated via the Nck-WASp-Arp2/3 pathway. Recent in vivo studies in mice however demonstrated that the Nck-mediated pathway was …
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E-SEM Characterization of Escherichia coli Biofilms Grown on Copper- and Silver-Alloyed Stainless Steels over a 48 -
The formation of bacterial biofilms on surfaces and their subsequent biofouling pose extensive safe and healthy concerns to a variety of industries. Biofilms are ubiquitous, and the biofilm state is considered the default mode of growth for the majority of the world's bacteria population. Once …
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Efficacy of Selected Chemicals on the Attachment and Survival of Campylobacter jejuni on Chicken Breast Skin
… is considered to be the leading cause of acute bacterial gastroenteritis in humans in the United States with Campylobacter jejuni being responsible for 80-90% of those infections. Many cases of Campylobacter gastroenteritis have been linked to the consumption of raw or undercooked chicken. The …
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A study of DNA-DNA interactions during bacteriophage lambda integrative recombination
… top strand or the bottom strand sequences of the bacterial attachment site (attB) with or without base substitutions in the core region were chemically synthesized. Annealed oligodeoxynucleotide attB sites containing sequences with perfect base pairs or one mismatched base apposition were shown to …
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Efficacy of Delmopinol in Preventing the Attachment of Campylobacter jejuni to Chicken, Stainless Steel and High-Density Polyethylene
Campylobacter spp. are the second leading bacterial cause of food borne illness in the U.S. New antimicrobials that prevent bacterial attachment may be effective for reducing Campylobacter. Delmopinol hydrochloride (delmopinol) is a cationic surfactant that is effective for treating and preventing …
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Synthesis and characterization of tethered poly(n-isopropylacrylamide) for quantitative cell adhesion studies
… to directly correlate a measurable force to bacterial attachment and release represents a step forward in understanding of interactions between PNIPAAm and bacterial cells. Our work demonstrates the potential of stimuli responsive polymers as possible fouling-release agents, and suggests that …
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The Microbiological Aspects of Early Stages of Marine Fouling
In this study, the ecology of attached marine bacterial populations on materials of economic significance was considered. Specific aspects of the microbial film examined were its composition, construction, and dynamics of bacterial attachment. Precise and practical methods for collecting data from …
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Modification of mineralized collagen scaffolds to overcome challenges of craniomaxillofacial bone repair
… to infection, and methods to combat initial bacterial attachment to the biomaterial surface may improve regeneration outcomes. In this thesis, mineralized collagen scaffolds are modified in such a way to overcome the challenges of craniomaxillofacial repair and what these improvements in the …
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Localization and Function of Bacterial Type III and IV Effector Proteins
… of information relay in both space and time. Bacterial effector proteins are virulence factors that are directly secreted from the bacteria into the host cytosol and function to rewire eukaryotic signaling networks to establish an environment for bacterial survival. While much effort has gone …
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Investigating the effect of mutations in lipopolysaccharides (LPS) (O-antigen and Core region) of Salmonella Typhimurium on the colonisation of “microgreens”
… Lysine Deoxycholate (XLD) agar to quantify bacterial proliferation and attachment. These results demonstrated that S. Typhimurium ATCC 14028 successfully colonised the roots of all nine microgreens, with higher bacterial counts observed in rhubarb chard, Swiss chard, and celery compared to …
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Interactions between calanoid copepod hosts and their associated microbiota
… highly abundant environmental reservoirs of many bacterial pathogens. Although copepods are known to support diverse and productive bacterial communities, little is understood about whether copepods are affected by bacterial attachment and whether they can regulate these associations through …
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Allyl isothiocyanate reduces Salmonella enterica Michigan and Listeria monocytogenes on the surface of whole cantaloupe (Cucumis melo L.)
… surface topography of netted cantaloupes aids bacterial attachment. This research evaluates the use of allyl isothiocyanate (AITC; a natural antimicrobial) to reduce populations of S. enterica Michigan and L. monocytogenes on the surface of cantaloupe. Fifty μl of S. Michigan or L. …
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The Ligand and Function of the RegIII Family of Bactericidal C-Type Lectins
… immune system plays a crucial role in preventing bacterial incursions across gut epithelial surfaces. Mucosal epithelial cells produce a variety of secreted antimicrobial proteins that help to prevent bacterial attachment and encroachment at epithelial surfaces. Among these, Paneth cells are …
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The impact of bacteria on the biophysics of water retention and flow in soil
… involved in the formation of the matrix of the bacterial biofilm, lipopolysaccharide is a cell membrane component required for bacterial attachment, and viscosin is a biosurfactant released from the bacteria. Four isogenic strains mutated so as to heighten or suppress production of one of these …
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Antimicrobial PLA and Calcium Phosphate Coatings and Thin Film Composites for Implants Applications
… was to design a novel multi-functional and antibacterial coating for implants as the drug delivery systems to prevent post-operative complications and osteomyelitis. The main challenge was to obtain the perfect design and the selection of appropriate biomaterials; implantable device with …
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