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Dissertations / Theses on the topic 'Bacterial biofilms'

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Published: 4 June 2021

Last updated: 25 July 2025

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1

Hughes, Kevin A. "Bacterial biofilms and their exopolysaccharides." Thesis, University of Edinburgh, 1997. http://hdl.handle.net/1842/15053.

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Bacterial biofilms are formed when bacteria in a liquid environment adhere to a surface, multiply to form microcolonies and synthesis a protective glycocalyx composed mainly of hydrated exopolysaccharide (EPS). Bacterial biofilms form in natural, medical and industrial environments and are usually highly heterogeneous. Biofilms can be single or multi-species and their characteristics are dictated by the environment in which they develop. The biofilm bacteria analysed were isolated from a factory environment and all were members of the Enterobacteriaceae. The composition of their extracellular

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2

Wang, Anqi. "Bacterial biofilms and biomineralisation on titanium." Thesis, University of Birmingham, 2011. http://etheses.bham.ac.uk//id/eprint/1562/.

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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 Escherichia coli was compared on commercially pure titanium, Ti6Al4V alloy, pure aluminium and pure vanadium. Grain boundaries, grain orientation and alloy phase structure did not influence adhesion or early proliferation. Adherence of all four strains was equivalent on pure titanium and Ti6Al4V and in

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3

Leiman, Sara. "Genetics and Regulation of Bacterial Biofilms." Thesis, Harvard University, 2015. http://nrs.harvard.edu/urn-3:HUL.InstRepos:17463954.

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Bacterial biofilm formation, the construction of dense, protective, multicellular communities, is a widely conserved behavior. In some bacteria, such as the Gram-positive model organism Bacillus subtilis, the genetics controlling biofilm formation are well understood. In other bacteria, however, including the Gram-negative opportunistic pathogen Pseudomonas aeruginosa, the identities or roles of many biofilm genes remain unknown. Importantly, many proposed applications of biofilm research, particularly in the medical field, require knowledge not only of biofilm assembly but also of biofilm

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4

Martins, Thaísa Zanetoni. "Mutagênese sítio-dirigida da ORF XAC0024 de Xanthomonas citri subsp. citri e suas implicações no desenvolvimento do cancro cítrico /." Jaboticabal, 2016. http://hdl.handle.net/11449/138238.

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Orientador: Jesus Aparecido Ferro<br>Coorientador: Helen Alves Penha<br>Banca: Fabrício José Jaciani<br>Banca: Flávia Maria de Souza Carvalho<br>Resumo: O cancro cítrico tem como agente causal a bactéria Xanthomonas citri subsp. citri (Xac), que afeta diferentes espécies de citros economicamente importantes. É uma doença ainda sem método curativo, e pela sua relevância e dano econômico, faz-se necessário o entendimento em termos moleculares da interação Xac-citros para o desenvolvimento de estratégias que controlem a doença. O objetivo do presente trabalho foi investigar os efeitos da deleção

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5

Ghalsasi, Vihang Vivek [Verfasser], and Victor [Akademischer Betreuer] Sourjik. "Engineering bacteria to disperse bacterial biofilms / Vihang Vivek Ghalsasi ; Betreuer: Victor Sourjik." Heidelberg : Universitätsbibliothek Heidelberg, 2015. http://d-nb.info/1180608275/34.

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Ghalsasi, Vihang Vivek Verfasser], and Victor [Akademischer Betreuer] [Sourjik. "Engineering bacteria to disperse bacterial biofilms / Vihang Vivek Ghalsasi ; Betreuer: Victor Sourjik." Heidelberg : Universitätsbibliothek Heidelberg, 2015. http://d-nb.info/1180608275/34.

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7

Andersson, Sofia. "Characterization of Bacterial Biofilms for Wastewater Treatment." Doctoral thesis, KTH, Miljömikrobiologi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10118.

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Research performed at the Division of Environmental Microbiology has over the last years resulted in the isolation of possible bacterial key-organisms with efficient nutrient removal properties (Comamonas denitrificans, Brachymonas denitrificans, Aeromonas hydrophila). Effective use of these organisms for enhanced nutrient removal in wastewater treatment applications requires the strains to be retained, to proliferate and to maintain biological activity within theprocess. This can be achieved by immobilization of the organisms using an appropriate system.Two putative immobilization systems, ag

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8

Taylor, Richard James. "Efficacy of industrial biocides against bacterial biofilms." Thesis, University of Birmingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289755.

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9

Roberts, Sara Kate. "Formation and control of bacterial-fungal biofilms." Thesis, University of Exeter, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324721.

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10

Irsfeld, Meredith Lynn. "Physical and Chemical Treatments for Bacterial Biofilms." Thesis, North Dakota State University, 2014. https://hdl.handle.net/10365/27595.

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Physical and chemical treatments have been investigated for the treatment to remove biofilms. This thesis examines the problem of the removal and prevention of biofilms by: (i) using a water jet to determine biofilm stability and (ii) testing the effect of ?-phenylethylamine (PEA) on growth and biofilm amounts. Three dimensional structures of biofilms vary in different genetic backgrounds of E. coli, we wanted to see whether changes in structures were paralleled by differences in stability of the biofilm. The water jet apparatus was used to test biofilm stability of E. coli mutants. Alteration

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11

Graziano, Talita Signoreti 1988. "Effects of statins in the bacterial viability and on biofilm of Staphylococcus aureus." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289491.

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Orientadores: Karina Cogo Müller, Francisco Carlos Groppo<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-08-25T11:18:29Z (GMT). No. of bitstreams: 1 Graziano_TalitaSignoreti_M.pdf: 1603562 bytes, checksum: 9522f75e1f8c1147c84c0fde100549ed (MD5) Previous issue date: 2014<br>Resumo: As estatinas são um grupo de fármacos que atuam como inibidores competitivos da enzima 3-Hidroxi-3-MetilGlutaril Coenzima-A Redutase (HMG-CoA redutase). Além de atuarem como importantes agentes hipolipemiantes, também apresen

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12

Parahitiyawa, Nipuna Bandara. "Phylogenetic aspects of oral bacterial microbiome." Thesis, Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B43278486.

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13

Newstead, Mark A. "Modelling the development and growth of bacterial biofilms." Thesis, Loughborough University, 2009. https://dspace.lboro.ac.uk/2134/6102.

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When bacteria attach to a solid surface they form biofilms, which increases their chances of survival. These biofilms can be very useful for example in soil and water treatment; however they can also cause serious illness. In this thesis we study and model biofilms in both one and two dimensions, to increase our understanding of their growth and development. These models use a continuum approach where we ssume that the biofilm is a viscous fluid that is free to grow, whilst sitting on a solid impermeable surface. The esulting equations where solved using various numerical techniques, including

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14

Steele, Andrew. "The biodecontamination of stainless steel by bacterial biofilms." Thesis, University of Portsmouth, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318163.

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15

Elvers, Karen Trepka. "Bacterial-fungal biofilms in industrial flowing water systems." Thesis, University of Exeter, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244421.

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16

Wallace, Heather A. "Mathematical modelling of wrinkle formation in bacterial biofilms." Thesis, University of Dundee, 2016. https://discovery.dundee.ac.uk/en/studentTheses/5ecaa42d-7299-4d33-a245-45c7f535570a.

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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 their existence is known to contribute both beneficial and detrimental effects. One of the defining characteristics of biofilms is heterogeneity in their structure. Indeed, it is commonly observed that biofilms of certain species of bacteria grown under certain conditions can display an unusual wrin

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17

Schroeder, Meredith Lynn. "Investigation of Nutrients as Treatments of Bacterial Biofilms." Diss., North Dakota State University, 2019. https://hdl.handle.net/10365/29302.

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Using nutrients bacteria utilize to grow as treatments of bacterial biofilms have been investigated. This dissertation examines the problem of the prevention and treatment of biofilms by: (i) testing the effect of the nutrient ?-phenylethylamine (PEA) on growth, ATP content of biofilm, and biofilm biomass, (ii) testing the effect of ethyl acetoacetate (EAA) and other small molecules on growth, ATP content of biofilm, and biofilm biomass, and (iii) investigating three applications of PEA and EAA. PEA could be used as both, prevention and treatment for bacterial biofilms. We observed a reduction

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18

Cogo, Karina 1980. "Avaliação in vitro do efeito da nicotina, cotinina e cafeina sobre microrganismos orais." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/288966.

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Orientadores: Francisco Carlos Groppo, Pedro Luiz Rosalen<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-08-06T14:44:39Z (GMT). No. of bitstreams: 1 Cogo_Karina_M.pdf: 1252832 bytes, checksum: c6cff0a881e182ed79ce20ff045dd117 (MD5) Previous issue date: 2006<br>Resumo: Existem evidências de que o biofilme presente na região subgengival é o principal agente etiológico das doenças periodontais. O uso do cigarro tem sido associado com a progressão da doença periodontal bem como com a redução da resposta à

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19

Tram, Greg C. "Characterisation of Bacterial Biofilm Formation." Thesis, Griffith University, 2020. http://hdl.handle.net/10072/392378.

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Campylobacter jejuni is the largest contributor to bacterial gastroenteritis in the developed world. In addition to intestinal infections, this organism is implicated in the autoimmune neurodegenerative condition known as Guillain–Barré syndrome. C. jejuni is a common commensal organism of warm-blooded animals and avians that is passed to humans through contaminated food products or water. Biofilms are a specialised method of growth seen in many microbes and provide a means for bacteria to remain viable in harsh environmental conditions. The biofilms of C. jejuni have been hypothesised to play

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20

Sadeghi, Abbas. "Development of a Semi-synthetic Medium Supporting Adherent Growth in Coagulase-Negative Staphylococci." PDXScholar, 1992. https://pdxscholar.library.pdx.edu/open_access_etds/13.

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A semi-synthetic medium for use in determining adherent growth with Staphylococcus epidermidis and Staphylococcus saprophyticus was developed. Production of an adherent biofilm was dependent upon the presence of hematin in the growth medium. Clinical strains of Staphylococcus epidermidis were tested for production of an adherent biofilm in trypticase soy broth, the semi-synthetic medium and the hyperalimentary nutrient solution used in the neonatal hospital unit. An adherent biofilm was obtained when Staphylococcus epidermidis was cultured m hematin supplemented hyperalimentary solution. Growt

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21

Ivanova, Kristina Dimitrova. "Nanostructured coatings for controlling bacterial biofilms and antibiotic resistance." Doctoral thesis, Universitat Politècnica de Catalunya, 2017. http://hdl.handle.net/10803/405631.

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The accelerated emergence of drug resistant bacteria is one of the most serious problems in healthcare and the difficulties in finding new antibiotics make it even more challenging. To overcome the action of antibiotics bacteria develop effective resistance mechanisms including the formation of biofilms. Biofilms are bacterial communities of cells embedded in a self-produced polymeric matrix commonly found on medical devices such as indwelling catheters. When pathogens adopt this mode of growth on the surface, they effectively circumvent host immune defences and antibiotic therapy, causing sev

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22

Flynn, Padrig Benjamin. "Controlling bacterial biofilms and virulence using non-thermal plasma." Thesis, Queen's University Belfast, 2017. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.726343.

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The original work presented in this thesis provides examples of the unique chemistry of a helium/oxygen Kilohertz plasma jet and its antimicrobial activity against a cohort of clinically relevant microorganisms termed the ESKAPE pathogens (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, Enterobacter cloacae). The potential of non-thermal plasma to attenuate quorum sensing controlled bacterial virulence is demonstrated in Gram-negative bacteria with further elucidation undertaken to examine how examples of plasma produced reac

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23

Bojanowski, Caitlin. "Strategies for the Prevention and Remediation of Bacterial Biofilms." University of Dayton / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1512852909498052.

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24

Verderosa, Anthony Daniel. "Nitroxide functionalised antibiotics for the eradication of bacterial biofilms." Thesis, Queensland University of Technology, 2019. https://eprints.qut.edu.au/135167/1/Anthony_Verderosa_Thesis.pdf.

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Bacterial biofilms are a leading cause of life-threatening and device-related infections worldwide. Biofilm related infections are notoriously difficult to treat as they are highly tolerant to conventional antibiotics. This project has designed and synthesised a new class of antibiotics to circumvent biofilm tolerance and shown that the prepared compounds could eradicate several medically important pathogens (P. aeruginosa, E. coli, and S. aureus). Importantly, as these compounds are hybrids of drugs that are already used clinically as stand-alone therapies, they demonstrate great potential to

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25

Dodds, Ian. "Bacterial activity in permeable beds." Thesis, University of Exeter, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267222.

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26

Mitik-Dineva, Natasa. "Bacterial attachment to micro- and nano- structured surfaces." Swinburne Research Bank, 2009. http://hdl.handle.net/1959.3/48547.

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The ongoing interest in bacterial interactions with various surfaces, followed by attachment and subsequent biofilm formation, has been driven by the importance of bacterial activities in number of medical, industrial and technological applications. However, bacterial adhesion to surfaces has not been completely understood due to the complexity of parameters involved. The study presented herein investigates the attachment pattern of nine medically and environmentally significant bacteria belonging to different taxonomic lineages: Firmicutes - Bacillus, Gammaproteobacteria, Alphaproteobacteria

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27

Wood, Helen Louise. "Isolation of novel bacterial antigens associated with ventriculoperitoneal shunt infections." Thesis, University of Nottingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342498.

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28

Windler, Miriam [Verfasser]. "Bacterial Influence on Diatoms from Photoautotrophic Freshwater Biofilms / Miriam Windler." Konstanz : Bibliothek der Universität Konstanz, 2015. http://d-nb.info/1103490605/34.

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29

Dalwai, F. "In vitro modelling of bacterial population shifts in oral biofilms." Thesis, University College London (University of London), 2008. http://discovery.ucl.ac.uk/1444149/.

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In vitro models of dental plaque are a valuable tool for understanding the development of plaque-related diseases and assessing potential treatments for these diseases. The main focus of this study was the development of an in vitro model to characterise the changes in bacterial populations from dental plaque associated with health to one associated with gingivitis. By emulating environmental conditions in the oral cavity associated with gingivitis it was possible to see changes in the oral microbiota associated with gingivitis. Using traditional culture techniques the ascendancy of Actinomyce

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30

Jass, Jana. "The effect of antibiotics and electrical currents on bacterial biofilms." Thesis, University of Exeter, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260806.

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31

Vance, Lindsey. "The Inhibitory Effects of a Novel Gel on Staphylococcus aureus Biofilms." Digital Commons @ East Tennessee State University, 2018. https://dc.etsu.edu/honors/435.

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Antibiotic resistance is an ever-growing topic of concern within the medical field causing researchers to examine the mechanisms of resistance to develop new antimicrobials. Bacteria’s ability to form biofilms is one mechanism which aids in antimicrobial resistance. Staphylococcus aureus is of special interest as it is one of the most frequent biofilm-forming bacteria found on medical devices causing infections and posing dangerous threats in a clinical setting. A recently developed antimicrobial gel has been shown to have profound effects on treating bacterial infections and wound healing. Th

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Laramée, Louise. "Genetic characterization of a diclofop-methyl-degrading bacterial consortium." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq29733.pdf.

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33

Boltz, Joshua. "The Kinetics of Particulate Substrate Utilization by Bacterial Films." ScholarWorks@UNO, 2005. http://scholarworks.uno.edu/td/254.

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There is a need to develop a mathematical expression capable of describing the removal of particulate chemical oxygen demand (PCOD) from wastewaters in biological film systems. In this context, organic particles that are maintained in suspension (i.e., not removed during normal settling) are the focus of experimentation, modeling, and discussion. The goal of this research project is to study the kinetics of PCOD removal from wastewaters by bacterial films, or biofilms. To achieve this objective, a bench-scale rotating disc biofilm reactor (RDBR) was operated using methanol (dissolved

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34

Orzechowski, Paulo Roberto. "Is there an association between periodontal pathogens colonization and the frequency of some specific serotype of Aggregatibacter actinomycetemcomitans?" Universidade de Taubaté, 2012. http://www.bdtd.unitau.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=415.

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Aggregatibacter actinomycetemcomitans is a gram-negative, facultative anaerobic coccobacillus bacterium that colonizes the human oral cavity. Regarding the bacterial consortium found into biofilms, previous studies have suggested that the occurrence of particular serotypes of A. actinomycetemcomitans may be related to other oral microorganisms. Interestingly, the relations among these bacterial species seem to be under influence of geographic and ethnical aspects. Objective: This study aimed to evaluate the frequency of A. actinomycetemcomitans serotype-specific antigens and its association wi

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35

Skipper, Philip. "Biodeterioration of limestone : role of bacterial biofilms and possible intervention strategies." Thesis, University of Lincoln, 2018. http://eprints.lincoln.ac.uk/33697/.

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Limestone built heritage is at risk from the effects of biofilms, a microbial community encapsulated in a matrix of sugars, protein and extracellular DNA. Although biofilm research has been carried out in Mediterranean regions, few studies cover temperate Northern Europe climates, or the UK. This study concentrates on bacterial colonisation of Lincoln limestone, a highly vulnerable building material, and identifies the species, their role in biodeterioration and the efficacy of biocides against them. As part of this study the core species which comprise the bacterial component of the limestone

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Birjiniuk, Alona. "Particle tracking for understanding the properties and dynamics of bacterial biofilms." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98702.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemical Engineering, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 89-93).<br>Bacterial biofilms consist of surface adherent bacteria that surround themselves with a polymer matrix which provides environmental protection and antibiotic resistance. Biofilms can grow on most implanted medical devices, on heart valves, and in the lungs of patients with cystic fibrosis, resulting in difficult to treat infections that can become blood-borne and spread throughout the body. They also p

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37

Kobayashi, Yuki. "Longitudinal and seasonal variations in bacterial community composition in river biofilms." 京都大学 (Kyoto University), 2009. http://hdl.handle.net/2433/124462.

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Allan, Iain Urquhart. "The formation and viability of oral bacterial biofilms on bioactive implant materials." Thesis, University College London (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394274.

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39

Karampatzakis, Andreas. "Novel spectroscopy techniques for functional imaging of bacterial biofilms at microscopic level." Thesis, Imperial College London, 2017. http://hdl.handle.net/10044/1/56866.

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Biofilms are complex aggregations of microorganisms in which cells adhere on a surface and are held together in a matrix of extracellular polysaccharide substances (EPS). Biofilms are very resistant to attacks and are responsible for the majority of bacterial infections. They are highly heterogeneous and within colonies, both chemical and physical gradients exist. Therefore, in order to study and understand their functionalities, it is essential to develop methods that can provide information at high spatiotemporal resolutions. In this thesis, two novel spectroscopic techniques, namely Transie

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Frost, Isabel. "The evolution of antibiotic resistance in bacterial colonies." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:8dc07d49-0eb4-42fd-9a8e-ac3984eb587c.

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The continuing rise of antibiotic resistance is threatening a return to the world of pre-antibiotic medicine. Multi-drug resistant pathogens are already claiming lives and causing economic losses in developing and developed countries alike. We need, therefore, to understand what allows resistant strains to spread; what makes them evolutionarily competitive in and amongst other strains and species. The majority of laboratory studies of antibiotic resistance focus on simple growth in liquid culture. By contrast, microbes commonly grow as surface-associated communities, in which interactions betw

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Huggett, Megan Jane School of Biological Earth &amp Environmental Sciences UNSW. "Settlement of generalist marine invertebrate herbivores in response to bacterial biofilms and other cues." Awarded by:University of New South Wales. School of Biological, Earth and Environmental Sciences, 2006. http://handle.unsw.edu.au/1959.4/23324.

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Most marine invertebrates have a complex life cycle involving a benthic adult phase, and a planktonic larval phase. The process whereby tiny larvae are able to locate, settle and metamorphose in a habitat where juveniles are then capable of successfully establishing themselves is a key stage in the life cycle and a central theme of current marine research. Bacterial biofilms are an important settlement cue for many larvae, and it appears that particular strains within environmental communities may be responsible for the inducing ability of some biofilms. The focus of this thesis is the importa

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Huang, Yi-Li. "Potential roles of bacterial quorum sensing and biofilm formation in the biofouling process /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?AMCE%202007%20HUANG.

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El, Moustaid Fadoua. "Mathematical modelling of bacterial attachment to surfaces : biofilm initiation." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/17931.

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Thesis (MSc)--Stellenbosch University, 2011.<br>ENGLISH ABSTRACT: Biofilms are aggregations of bacteria that can thrive wherever there is a watersurface or water-interface. Sometimes they can be beneficial; for example, biofilms are used in water and waste-water treatment. The filter used to remove contaminants acts as a scaffold for microbial attachment and growth. However, biofilms could have bad effects, especially on a persons health. They can cause chronic diseases and serious infections. The importance of biofilms in industrial and medical settings, is the main reason of the mathem

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Hussain, Malik Asif. "An investigation of the impact of bacterial diversity, pathogenic determinants and biofilms on chronic wounds." Thesis, Queensland University of Technology, 2017. https://eprints.qut.edu.au/110339/2/Malik_Asif_Hussain_Thesis.pdf.

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The researcher investigated the abundance and diversity of bacteria in chronic wounds. Chronic wounds are a significant public health burden and associated with complex polymicrobial communities. Bacterial colonization has been hypothesized to be one of the main underlying causes of chronic wounds and leads to detrimental effects on wound healing. Next-generation sequencing technologies were utilized to identify possible bacterial biomarkers to predict wound healing trajectory. Overall, bacterial bioburden and their molecular characteristics were found to be associated with and predictive of p

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Rode, Alexander. "Isolierung und Charakterisierung von bakteriellen extrazellulären polymeren Substanzen aus Biofilmen / Isolation and characterization of bacterial extracellular polymeric substances from biofilms." Gerhard-Mercator-Universitaet Duisburg, 2004. http://www.ub.uni-duisburg.de/ETD-db/theses/available/duett-09132004-102114/.

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Microorganisms in biofilms are kept together by extracellular polymeric substances (EPS). The EPS are key molecules for the structure, function and organization of biofilms. Chemical and / or physical isolation methods are being used for the quantitative separation of EPS from biofilms. The yield of EPS depends on the method of isolation. Four different methods of EPS isolation were used in this work (separation by stirring and centrifugation, use of a cation exchange resin, extraction with formaldehyde and extraction with formaldehyde and NaOH) on pure culture biofilms of Pseudomonas aerugino

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Wang, Yiying. "Effect of Aligned Nanoscale Surface Structures on Microbial Adhesion." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/104040.

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Microbes in nature live collaboratively in adherent communities, known as biofilms. Biofilms can be contextually beneficial or detrimental. In medical implants, biofilms cause infections leading to additional healthcare costs of billions of dollars. Studies have found that micro/nanoscale surface topography can significantly alter (i.e., promote or hinder) the process of biofilm formation. The formation of biofilm starts with planktonic microbes attach to the surface. To further understand the biophysical underpinning of this process, the effect of aligned nanoscale surface structures on micro

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Walker, James. "Investigation of biofilms in copper tube corrosion and the survival of Legionella pneumophila on alternative plumbing materials." Thesis, Open University, 1994. http://oro.open.ac.uk/57503/.

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An unusual form of copper tube corrosion, occurring in two hospitals, was investigated during two site surveys and due to the presence of characteristic perforations became known as pepper-pot pitting corrosion. The corrosion was found to occur predominantly in soft water areas but mainly in hot water systems maintained below 50'C. When monitoring the hot water system at a particular site the water temperature was found to decrease overnight with a corresponding decrease in the dissolved oxygen concentration and assimilable organic carbon. Copious amounts of biofilrn were recovered from the pi

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Barlett, Melissa Ann. "The Effects of Nutrient Type and Stoichiometry on Bacterial Community Composition in Streams and Wetlands." Kent State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=kent1195590609.

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Mok, Rachel V. (Rachel Verla). "An individual-based GPU simulation framework for collective bacterial dynamics in swarms and biofilms." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122136.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2019<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 121-133).<br>With recent technological advancements, observations and measurements of complex bacterial communities at single-cell resolution are now possible. Guided by these rich experimental data sets, we develop minimal individual-based models to uncover the governing forces driving the dynamics in microbial systems. Our model incorporates the biophysical processes of cell growth and division, viscous drag,

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Mechmechani, Samah. "Hurdle technology using microencapsulated proteolytic enzymes and microencapsulated carvacrol to fight pathogenic bacterial biofilms." Electronic Thesis or Diss., Université de Lille (2022-....), 2022. http://www.theses.fr/2022ULILR023.

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L'environnement opératoire dans les domaines alimentaire et médical permet aux bactéries de se fixer et de se développer sur les surfaces, ce qui entraîne la formation de biofilms bactériens pathogènes et résistants. Ces structures pathogènes sont responsables de nombreuses maladies d'origine alimentaire et d'infections associées aux soins. Par conséquent, pour lutter contre ce fléau de santé publique, plusieurs stratégies ont récemment été proposées, notamment l'élimination chimique et mécanique. Ce travail présente les différents facteurs qui influencent l'adhésion bactérienne et la formatio

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