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Dissertations / Theses on the topic 'Bacterial behaviour'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Micali, Gabriele. "Bacterial chemotaxis : from information processing to behaviour." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/50712.

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Chemotaxis allows flagellated bacteria to navigate in complex chemical environments, following nutrients and escaping toxins. The sensory system made up of chemoreceptors is constantly monitoring the extracellular concentrations of nutrients and toxins, while the signalling pathway processes and transmits the external information to the flagellated motors for movement. In the case of Escherichia coli, the chemotaxis pathway has been extensively characterised experimentally using genetics, biochemistry, and a wide range of imaging tools. This makes E. coli an ideal model organism for quantitati

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2

Farrell, Fred Desmond Casimir. "Modelling collective behaviour and pattern formation in bacterial colonies." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/10452.

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In this Thesis I present simulation- and theory-based studies of pattern formation and growth in collections of micro-organisms, in particular bacterial colonies. The aim of these studies is to introduce simple models of the 'micro-scale' behaviour of bacterial cells in order to study the emergent behaviour of large collections of them. To do this, computer simulations and theoretical techniques from statistical physics, and in particular non-equilibrium statistical physics, were used, as the systems under study are far from thermodynamic equilibrium, in common with most biological systems. Si

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3

Chacko, Sarah Jane. "Surface attachment behaviour in Rhodobacter sphaeroides." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:943eb194-b147-4cb9-bbc2-a9fd04a45949.

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Motility and chemotaxis have been implicated in the process of biofilm formation in a wide range of species. Using a combination of microscopy and image analysis, genetics, microbiology and biochemistry, the initial approach of Rhodobacter sphaeroides cells to a solid surface has been characterised. Interestingly, these data suggest that for R. sphaeroides alterations in motility and swimming behaviour may result in differences in biofilm formation simply by changing the number of cells which reach the surface. This is in contrast to a few other well-studied species where the motility apparatu

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4

Jeziorska, Wanda. "The behavioural responses of Rhodobacter sphaeroides to carbohydrates." Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305506.

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5

Mina, Petros. "Mathematical modelling and analysis of emergent behaviour in bacterial populations." Thesis, University of Bristol, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.628994.

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This thesis develops and analyses an agent based model of a bacterial Eschericia coli population in a quorum motivated by published experimental work The E. coli cells harbour a synthetic genetic regulatory network that is responsible for oscillatory behaviour across the population. The model is used to understand whether the collective oscillations seen in the experiments are an outcome of coupled oscillators synchronising or if they are an emergent property of the population. A bottom-up approach is used whereby an ordinary differential equation model is developed based on the biochemical dy

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6

Banerjee, Mousumi. "Occurrence and behaviour of foodborne bacterial pathogens in Indian retail spices." Thesis, University of North Bengal, 2002. http://hdl.handle.net/123456789/1071.

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7

Roy, Arindam. "Occurrence and behaviour of foodborne bacterial pathogens in some lagume-based traditional fermented foods marketed in West Bengal, India." Thesis, University of North Bengal, 2007. http://hdl.handle.net/123456789/1050.

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8

Reise, Franziska [Verfasser]. "Functional glycomimetics to explore bacterial adhesion and membrane behaviour: Synthesis and applications / Franziska Reise." Kiel : Universitätsbibliothek Kiel, 2019. http://d-nb.info/1177033623/34.

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9

Bass, Catherine Jennifer. "Survival of sulphate-reducing bacteria from oil field reservoirs : characteristics and behaviour of sulphidogenic bacterial consortia from oil field reservoirs under simulated laboratory conditions." Thesis, University of Exeter, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324131.

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10

Li, Martin. "Experimental study of swimming flagellated bacteria and their collective behaviour in concentrated suspensions." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/4787.

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This thesis investigates bacterial motility from the mechanism permitting individual selfpropulsion to the complex collective flocking motility in Escherichia coli and Bacillus subtilis cells. Understanding bacterial swimming has intrigued scientists for decades and recently there has been a growing interest in collective swimming behaviour. The first part of this thesis reviews the characteristics of E. coli and B. subtilis cells subsequently describing the governing physics and constraints of self-propulsion in the low Reynolds regime. The second part of this thesis presents three self-conta

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11

Sekora, Michael David. "Tactic behaviors in bacterial dynamics." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32915.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2005.<br>Includes bibliographical references (leaves 89-90).<br>The locomotion of a wide class of motile bacteria can be mathematically described as a biased random walk in three-dimensional space. Fluid mechanics and probability theory are invoked to model the dynamics of bacteria swimming using tactic behaviors (movements or reorientation in response to chemical, physical or environmental stimuli) in flowing, viscous media. Physical descriptions are developed for bacterial chemotaxis (response to chemical agents) near pa

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12

Massé, Cécile. "Effets de la bioturbation sur la diversité des communautés bactériennes du sédiment : approches expérimentale et in-situ : de Melinna palmata aux communautés de la vasière Ouest-Gironde." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0039/document.

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Le lien entre la macrofaune et les communautés bactériennes benthiques a été déterminé selon deux approches : (1) une approche expérimentale à l’échelle de l’individu ciblée sur les effets de l’activité et de la bioturbation du polychète déposivore de surface Melinna palmata sur la distribution des communautés bactériennes des premiers millimètres de l’interface eau-sédiment ; (2) une approche in situ à l’échelle de la communauté de mise en corrélation des patrons spatiaux de distribution des communautés de macrofaune et de bactéries.Melinna palmata appartient à un nouveau groupe fonctionnel d

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13

Dombrowski, Christopher Charles. "Bacterial Motility: From Propulsion to Collective Behavior." Diss., The University of Arizona, 2007. http://hdl.handle.net/10150/195677.

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This work explores bacterial motility from the mechanisms of propulsion of an individual cell to the complex behavior of collective motility. The shear modulus of bacterial flagella was measured by stretching isolated flagella with an optical trap and by measuring force extension curves of the stretched flagella shedding light onto the me-chanics involved in the motility of single micro-organisms. Experiments in concentrated suspensions of bacteria show collective behavior with large scale mixing on a time and length scale greater than can be understood from the standard model of "run and t

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14

Angelin, Martin. "Travel – a risk factor for disease and spread of antibiotic resistance." Doctoral thesis, Umeå universitet, Infektionssjukdomar, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-111057.

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As international travel is rapidly increasing, more people are being exposed to potentially more antibiotic resistant bacteria, a changed infectious disease epidemiology, and an increased risk of accidents and crime. Research-based advice is needed to adequately inform travellers about these risks. We studied travellers who sought advice from the Travel Medicine Clinic at the Department of Infectious Diseases, Umeå University Hospital, as well as university students from Umeå, Stockholm, and Gothenburg travelling abroad for study, research, and clinical exchange programs. From retrospective da

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15

Cornforth, Daniel Michael. "Social behaviour in bacteria : regulation, coinfection, and virulence." Thesis, University of Edinburgh, 2014. http://hdl.handle.net/1842/17609.

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Bacteria interact with one another in many ways, through helpful behaviours like producing fitness-enhancing secretions and signals as well as harmful ones like the release of anti-competitor toxins. These interactions are essential for bacterial growth and survival and can have substantial impacts on the virulence of bacterial pathogens. This thesis explores the theory of social interactions among bacteria, focusing on both the mechanisms that underlie them as well the consequences for pathogens coinfecting a host. I first propose a hypothesis for the regulation of competitive traits in bacte

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16

Rütschlin, Sina [Verfasser]. "Small Molecule Modulators of Bacterial Swarming Behavior / Sina Rütschlin." Konstanz : KOPS Universität Konstanz, 2019. http://d-nb.info/1189586592/34.

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17

Pierce, Christopher J. "Hydrodynamics and Collective Behavior of Magnetotactic Bacteria." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1574761477220177.

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18

Wu, Xinyu Wu. "Control of the mechanical behavior of bacterial cellulose by mercerization." Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case151092096578873.

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19

Liu, Xinliang [Verfasser]. "The Binding Behavior of Daptomycin on the Bacterial Membranes / Xinliang Liu." Bonn : Universitäts- und Landesbibliothek Bonn, 2018. http://d-nb.info/1192821394/34.

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20

Bertuccio, Alex Joseph. "Metal Species and Surfactant Impact on Bacterial Populations and Community Behavior." Research Showcase @ CMU, 2017. http://repository.cmu.edu/dissertations/1003.

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This work is motivated by the need to understand the environmental risks posed by antimicrobial silver and copper nanoparticles, from consumer products and pesticides, and surfactants, used for oil remediation. Silver and copper nanoparticles have biocidal properties, and surfactants have similar chemical structures as autoinducers, molecules bacteria use to communicate (known as quorum sensing), which may alter bacterial communication. The introduction of both classes of chemicals may pose different threats to bacterial populations to affect normal ecosystem functions. The dissertation addres

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21

Cornelis, Karen. "Behaviour of the phytopathogenic bacterium Rhodococcus fascians on plants." Doctoral thesis, Universite Libre de Bruxelles, 2000. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211753.

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22

Akter, Nousin. "Rheological behaviour of probiotic bacteria dispersed in maltodextrin and sucrose solutions." Thesis, Malmö universitet, Fakulteten för hälsa och samhälle (HS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-26378.

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Probiotic bacteria are live microorganisms, which manifest health benefits in humans. The goal of this work was to characterize rheological properties of probiotic bacteria (Lactobacillus reuteri) formulation in which maltodextrin and sucrose used as excipients. To fulfil the goal, first, thermal, structural and rheological properties of maltodextrin, sucrose solutions and probiotic bacteria slurry were investigated. Probiotic bacteria formulations were prepared by adding probiotic bacteria slurry to maltodextrin and sucrose solutions at different mass fractions. Finally, rheological propertie

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23

Curatolo, Agnese. "Collective behaviours in living systems : from bacteria to molecular motors." Thesis, Sorbonne Paris Cité, 2017. http://www.theses.fr/2017USPCC244/document.

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La première partie de ma thèse est consacrée à l’étude de l’auto-organisation de souches génétiquement modifiées de bactéries Escherichia coli. Ce projet, réalisé en collaboration avec des biologistes synthétiques de l’Université de Hong Kong, a pour objectif l’exploration et le décryptage d’un nouveau mécanisme d’auto-organisation dans des colonies bactériennes multi-espèces. Cela a été inspiré par la question fascinante de comment les écosystèmes bactériens comprenant plusieurs espèces de bactéries peuvent s’auto-organiser dans l’espace. En considérant des systèmes dans lesquels deux souches

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24

Brown, Adrian. "Molecular characterisation of behavioural functions in Agrobacterium tumefaciens." Thesis, Durham University, 1992. http://etheses.dur.ac.uk/6019/.

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Tn5 insertion behavioural mutants of A. tumefaciens C58C(^1) were available. Cloning of the kanamycin resistance gene allowed isolation of Tn5 flanking sequences from a number of the mutants. Flanking sequences from five mutants were used to isolate cosmids, overlapping the Tn5 insertion sites of the mutantsfrom a C58C(^1) library. Two cosmids, pDUB1900 and 1905 have been characterised. pDUB1900 contains the insertion sites of eight motility mutants, with another immediately adjacent. The pDUB1905 insert overlaps sequences interrupted in another three mutants. Behavioural genes in Agrobacteriu

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25

McGivney, Eric. "Understanding the Relationship Between Nanoparticles and Bacterial Group Behavior: Autolysis and Quorum Sensing." Research Showcase @ CMU, 2017. http://repository.cmu.edu/dissertations/1111.

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Nano-sized materials are being used to address some of humanities greatest challenges— cancer therapy, food and water security, and environmental remediation. While extremely promising for these applications, the production, use, and disposal of nanomaterials have resulted in their release into environmental compartments. One major concern of any novel contaminant is how it interacts with bacteria. Bacteria play essential roles in human health, engineered systems, and ecological functioning. Bacteria are capable of macro-scale influence because they have evolved communication systems that enab

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26

Sedlacek-Bassani, Juliana. "Uso de especiarias como aditivos naturais na produção de hambúrguer bovino /." Araçatuba, 2018. http://hdl.handle.net/11449/155847.

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Orientador: Elisa Helena Giglio Ponsano<br>Banca: Marcia Marinho<br>Banca: Aparecida de Fátima Michelin<br>Resumo: O interesse da população pelo consumo de alimentos saudáveis, práticos e com maior durabilidade é cada vez mais frequente. Para atender a essa demanda, as indústrias de alimentos têm buscado trabalhar com ingredientes naturais, visando minimizar o uso de aditivos sintéticos. O estudo objetivou investigar se a inclusão de diferentes especiarias em hambúrguer bovino afeta o crescimento bacteriano, a oxidação lipídica e as características sensoriais dos produtos. Foram elaboradas 4 f

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27

Lewis, Matthew R. (Matthew Robert) 1969. "The behavior of uranium in the environment : bacterial reduction of an aqueous uranium species." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/8840.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 2000.<br>Includes bibliographical references (p. 379-382).<br>Experimental and analytical studies were performed to investigate the behavior of uranium with bacteria in an anaerobic environment. Laboratory studies used Shewanella putrefaciens because of its ability to grow rapidly in aerobic conditions and reduce metals in anaerobic conditions. Under anaerobic conditions, Shewanella putrefaciens use aqueous uranium as the electron acceptor in lieu of oxygen. The reduction of U(VI) to U(IV) removes uranium from

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28

Leaman, Eric Joshua. "An Experimentally-validated Agent-based Model to Study the Emergent Behavior of Bacterial Communities." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/78072.

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Swimming bacteria are ubiquitous in aqueous environments ranging from oceans to fluidic environments within a living host. Furthermore, engineered bacteria are being increasingly utilized for a host of applications including environmental bioremediation, biosensing, and for the treatment of diseases. Often driven by chemotaxis (i.e. biased migration in response to gradients of chemical effectors) and quorum sensing (i.e. number density dependent regulation of gene expression), bacterial population dynamics and emergent behavior play a key role in regulating their own life and their impact on t

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29

Batmanghelich, Farhad. "Effect of mixed denitrifying and sulfate reducing bacterial biofilms on corrosion behavior of cast iron." University of Toledo / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1451311653.

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30

Hu, An. "Investigation of sulfate-reducing bacteria growth behavior for the mitigation of microbiologically influenced corrosion (MIC)." Ohio : Ohio University, 2004. http://www.ohiolink.edu/etd/view.cgi?ohiou1176404403.

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31

Nako, Entela. "Using E. coli as an experimental system to study the behavior of prion-like proteins." Thesis, Harvard University, 2013. http://dissertations.umi.com/gsas.harvard:11065.

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Prions are infectious, self-propagating protein aggregates that have been uncovered in evolutionary divergent members of the eukaryotic domain of life. It is not known whether prokaryotic organisms contain proteins that exhibit prion-like behavior. However, studies have shown that the E. coli cytoplasm can support conversion of the well-characterized Saccharomyces cerevisiae yeast prion protein Sup35 into the prion form and that this conversion, like in the yeast system, is dependent on the presence of amyloid aggregates of another yeast prion protein, a so-called PIN factor. It is interesting

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32

Castro, A. Felipe (Castro Arancibia) 1979. "Influence of dissolved oxygen on the physicochemical properties and migration behavior of selected bacterial pathogens." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=116013.

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Protection of potable water supplies demands a better understanding of the factors controlling migration of disease causing bacteria in subsurface environments. In this study, the migration behaviour of the waterborne pathogenic microorganisms Escherichia coli O157:H7 and Yersinia enterocolitica was investigated in water saturated granular systems. Both facultative bacteria were grown under aerobic and anaerobic conditions and further acclimatized to a microaerophilic or fully aerated environment for 21 h. Experiments were conducted using laboratory-scale packed columns over controlled extreme

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33

Vaitkevičius, Karolis. "Effects of Vibrio cholerae protease and pigment production on environmental survival and host interaction /." Umeå : Univ, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1474.

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34

Pichel, Marc Philippe [Verfasser], and Leon [Akademischer Betreuer] Abelmann. "The behaviour of magnetotactic bacteria in changing magnetic fields / Marc Philippe Pichel ; Betreuer: Leon Abelmann." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2018. http://d-nb.info/1155760549/34.

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35

Waisbord, Nicolas. "Magnetotactic bacteria as a driven active fluid : from single swimmer behavior to collective effects." Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10223.

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We report the work we lead on magneto tactic bacteria, from the point of view of active matter. The ability of this bacterium to swim at 100µm/s directed by the magnetic field makes it a good candidate to study driven active matter. Indeed, in this configuration, the self-propelled system is not dragged by an external force, and its directed motion comes from its biased orientation. We choose the strain MC-1 for our study, for the robustness of its individual behavior and its swimming speed. We studied the individual behavior, confirming previous results where the bacteria passively aligns on

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36

Rodrigues, Pedro A. D. P., and Pedro A. D. P. Rodrigues. "Bacterial Symbionts at the Colony and Individual Levels: Integration through Behavior and Morphology in a Social Insect." Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/621295.

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The determination of a symbiotic association as beneficial requires good assessment of the costs and benefits involved in the maintenance and transmission of these microbes across generations. In social insects, symbiotic associations are complex as they may involve a network of interactions between individual and colony that result in stable associations over evolutionary time. My goal was to investigate the roles of behavior and morphology as integrators that have enabled the benefits of harboring gut microbes to reach both adult and growing brood in a colony. To achieve this goal, I used tu

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37

Ozturkoglu, Sebnem. "Behaviour And Control Of Listeria Innocua During Manufacture And Storage Of Turkish White Cheese." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605543/index.pdf.

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Growth and survival of L. innocua and TAC in artificially inoculated Turkish White Cheese during manufacturing and storage periods, with respect to different level of contamination of L. innocua were investigated. Cheese products were manufactured by the short-set procedure in pilot-plant-sized vats, as in AO&Ccedil<br>dairy factory. Pasteurized cow&rsquo<br>s milk was inoculated with L. innocua for obtaining the initial loads of 3.84 and 7.12 log CFU/ml. Bacterial load of inoculated milk, whey, post-ripened curd and post-salted cheese was determined during processing at 20&plusmn<br>5&ordm<

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38

Bardin, Marcela Grigol 1988. "Higiene e cuidados com a genitália em mulheres com vulvovaginites = Hygiene and genital care of women with vulvovaginitis." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/312983.

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Orientadores: Paulo César Giraldo, Cristina Laguna Benetti Pinto<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas<br>Made available in DSpace on 2018-08-26T01:16:17Z (GMT). No. of bitstreams: 1 Bardin_MarcelaGrigol_M.pdf: 2975032 bytes, checksum: c14d12c0209845a33b97ae0599d148d9 (MD5) Previous issue date: 2014<br>Resumo: INTRODUÇÃO: A vaginose bacteriana (VB) e a candidíase vaginal (CV) são as vulvovaginites (VV) mais frequentemente encontradas em mulheres durante o ciclo reprodutivo. Embora os tratamentos dessas VV estejam esclarecidos, a prevençã

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39

De, Lamo Castellví Sílvia. "Behaviour of pathogenic gram negative bacteria inoculated in milk and model cheese treated with high hydrostatic pressure." Doctoral thesis, Universitat Autònoma de Barcelona, 2006. http://hdl.handle.net/10803/5672.

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Els efectes de les altes pressions hidrostàtiques i la capacitat per sobreviure, recuperar-se i créixer de tres microorganismes patògens (Yersinia enterocolitica, Escherichia coli Salmonella enterica) van ser investigats en llet desnatada i en un formatge model elaborat amb i sense estàrter. Les mostres inoculades amb aquests microorganismes, van ser tractades a 300, 400 i 500 MPa (exceptuant les mostres inoculades amb soques de S. enterica) durant 10 minuts a 20ºC o a temperatura ambient i van ser analitzades microbiològicament just després d'aplicar el tractament d'altes pressions i als 1, 2

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Peire, Morais Aitana. "The role of male courtship behaviour in prezygotic isolation in Nasonia do wasps finish what bacteria started? /." [S.l. : [Groningen : s.n.] ; University Library Groningen] [Host], 2007. http://irs.ub.rug.nl/ppn/301106282.

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41

Prithiraj, Alicia. "Corrosion behaviour of ferrous and non-ferrous alloys exposed to sulphate - reducing bacteria in industrial heat exchangers." Thesis, Vaal University of Technology, 2018. http://hdl.handle.net/10352/433.

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M.Tech. (Department of Chemical Engineering, Faculty of Engineering and Technology), Vaal University of Technology<br>Corrosion responses of some carbon steels, stainless steel and copper alloys in the presence of a culture of bacteria (referred to as SRB-Sulphate-reducing bacteria) found in industrial heat exchangers, was studied to recommend best alloys under this service condition, with techno-economic consideration. Water from cooling towers in three plants in a petrochemical processing complex were analysed for SRB presence. Two of the water samples showed positive indication of SRB prese

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42

Rebata-Landa, Veronica. "Microbial Activity in Sediments: Effects on Soil Behavior." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19720.

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Thesis (Ph.D)--Civil and Environmental Engineering, Georgia Institute of Technology, 2008.<br>Committee Chair: Santamarina, J. Carlos; Committee Member: Burns, Susan; Committee Member: Frost, David; Committee Member: Mitchell, James; Committee Member: Rix, Glenn; Committee Member: Sobecky, Patricia.

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Cisneros, Luis. "The Organized Melee: Emergence of Collective Behavior in Concentrated Suspensions of Swimming Bacteria and Associated Phenomena." Diss., The University of Arizona, 2008. http://hdl.handle.net/10150/195513.

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Suspensions of the aerobic bacteria {\it Bacilus subtilis} develop patterns and flows from the interplay of motility, chemotaxis and buoyancy.In sessile drops, such bioconvectively driven flows carry plumes down the slanted meniscus and concentrate cells at the drop edge, while in pendant drops such self-concentration occurs at the bottom.These dynamics are explained quantitatively by a mathematical model consisting of oxygen diffusion and consumption, chemotaxis, and viscous fluid dynamics.Concentrated regions in both geometries comprise nearly close-packed populations, forming the collective

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44

Pham, Vinh Dang. "Components modulating the predatory and developmental behaviors of the soil bacterium Myxococcus xanthus /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2004. http://uclibs.org/PID/11984.

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Hortin, Joshua. "Behavior of Copper Oxide Nanoparticles in Soil Pore Waters as Influenced by Soil Characteristics, Bacteria, and Wheat Roots." DigitalCommons@USU, 2017. https://digitalcommons.usu.edu/etd/6895.

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The goal of this project was to study the behavior of copper oxide nanoparticles in soil environments. Copper oxide nanoparticles have antimicrobial properties and may also be used in agricultural settings to provide a source of copper for plant health, but accidental or misapplication of these nanoparticles to soil may be damaging to the plant and its associated bacteria. Dissolved soil organic matter that is present in soil pore waters dissolved nanoparticles, but did not dissolve the expected amounts from a geochemical model because the geochemical model did not take into account surface ch

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Gray, David Steven. "Novel approaches to investigate behaviors of bacteria by atomic force microscopy and circulating tumor cells through microfluidics." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/89951.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 126-138).<br>The adaptability and apparent ingenuity of renegade and intruding cells within the human body present formidable challenges in warding off disease. As the longevity of humans increases, cancer will afflict greater numbers, and if bacteria continue to grow resistant to conventional antibiotics, new treatment approaches will need to be identified. Through the use of two types of advanced i

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Teratanatorn, Pavintorn. "Binding of bacteria to highly branched poly (N-isopropylacrylamide) modified with antibiotics : comparison of behaviour of linear and highly branched conformation." Thesis, University of Sheffield, 2018. http://etheses.whiterose.ac.uk/20816/.

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Poly (N-isopropylacrylamide) (PNIPAM) polymers are thermo-responsive and change conformation above their lower critical solution temperature (LCST). However, there is evidence that highly branched PNIPAM can be driven through a conformational change from open chain to globule at temperatures below the LCST by interaction of groups placed on the chain ends with a compatible molecule/ligand. It is less clear how the linear analogue would behave and our hypothesis is that it would collapse but with the chain ends shielded within the globule. In this study we explored the behaviour of a highly bra

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Palmer, Jacqueline K. "Effects of a prebiotic supplement on child behaviour and parental quality of life in autism spectrum disorder." Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/228686/1/Jacqueline_Palmer_Thesis.pdf.

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This pilot double-blind randomised controlled trial investigated whether using prebiotics to modify the gut bacteria of children with autism spectrum disorder could increase parental quality of life by improving child stress, meal-time behaviour, sleep and gastrointestinal symptoms. Children were randomised to 2.4g of the prebiotic-galactooligosaccharides (GOS) or placebo each day for 6 weeks (N=38). Changes in gut bacteria, basal cortisol and behaviours of interest were measured. GOS was well tolerated and significantly increased Bifidobacterium, but there was no difference between the interv

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Leggett, Helen Catherine. "Developments in social evolution and virulence in parasites." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:e69b69ae-440a-4d32-8947-efb4a0c55930.

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The study of social evolution and virulence in parasites is concerned with fitness consequences of trade-offs between parasite life history traits and interactions between parasite species and/or genotypes with their hosts. I develop our understanding of social evolution and virulence in parasites in several ways. (1) I review empirical evidence for the fundamental predictions of virulence-transmission trade-off theory and demonstrate that the fit between theory and data is primarily qualitative rather than quantitative; that parasites differ in their degree of host generalism, and this is lik

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50

Scott, Kyla. "Gut Pathophysiology in Mouse Models of Social Behavior Deficits." Digital Commons @ East Tennessee State University, 2020. https://dc.etsu.edu/honors/544.

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Autism spectrum disorders (ASD) encompass neurodevelopment disorders characterized by atypical patterns of development that impact multiple areas of functioning beginning in early childhood. The etiology of ASD is unknown and there are currently no preventative treatment options. Gastrointestinal symptoms are commonly associated comorbidities. The microbiota-gut-brain axis is a multidirectional communication chain that connects the central and enteric nervous system that relates brain function to peripheral intestinal functions. Changes within this axis have been postulated in ASD. For example

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