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Rozprawy doktorskie na temat „Microbial genetics”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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1

Brauer, Matthew Jonas. "Geometry and genetics of microbial adaptation /." Full text (PDF) from UMI/Dissertation Abstracts International, 2000. http://wwwlib.umi.com/cr/utexas/fullcit?p3004221.

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2

Hu, Yiguo. "Identification of Key Signaling Molecules with Therapeutic Potential for Ph+ Leukemia." Fogler Library, University of Maine, 2007. http://www.library.umaine.edu/theses/pdf/HuY2007.pdf.

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3

Lundin, Cecilia. "Homologous recombination at replication forks in mammalian cells /." Stockholm : Institutionen för genetik, mikrobiologi och toxikologi, Univ, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-207.

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Imamura, Kely Braga [UNESP]. "Caracterização funcional de um fator de transcrição hipotético no fungo Neurospora crassa." Universidade Estadual Paulista (UNESP), 2015. http://hdl.handle.net/11449/135929.

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Made available in DSpace on 2016-03-07T19:20:25Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-09-03. Added 1 bitstream(s) on 2016-03-07T19:24:03Z : No. of bitstreams: 1 000857370_20170430.pdf: 809498 bytes, checksum: 80b75f84f1c54021e456991ff49e7ef9 (MD5) Bitstreams deleted on 2017-05-05T11:53:10Z: 000857370_20170430.pdf,. Added 1 bitstream(s) on 2017-05-05T11:53:57Z : No. of bitstreams: 1 000857370.pdf: 3326185 bytes, checksum: 3f22efb9b253d3c96ffa4aefe4751ed0 (MD5)<br>O fungo Neurospora crassa tem sido amplamente utilizado como organismo modelo para o estudo de alguns aspectos da

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5

Meng, Da. "Bioinformatics tools for evaluating microbial relationships." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Dissertations/Spring2009/d_meng_042209.pdf.

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Thesis (Ph. D.)--Washington State University, May 2009.<br>Title from PDF title page (viewed on June 8, 2009). "School of Electrical Engineering and Computer Science." Includes bibliographical references.

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6

Robinson, Andrea Keryn. "Microbial zinc metallothioneins : function of SmtA and species distribution." Thesis, University of Newcastle Upon Tyne, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366622.

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7

Lolle, Susan Janne. "Expression of killer preprotoxin cDNA in Saccharomyces cerevisiae : functional analysis of the N-terminal leader domain." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=75435.

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Expression of cDNA clones of the M1 double-stranded RNA killer preprotoxin coding region in Saccharomyces cerevisiae successfully directed the synthesis of secreted active toxin. Transformants harbouring these expression plasmids also displayed a K1 specific immunity phenotype. Immunoprecipitation of intracellular proteins with antitoxin antiserum showed that these transformants synthesize a 42kd glycosylated preprotoxin precursor. Two smaller unglycosylated immunoreactive species could also be resolved. These toxin precursor species were characterized by using secretory-defective hosts, by co

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8

Simmons, Susan. "The microbial ecology of acidic environments." Thesis, University of Warwick, 2001. http://wrap.warwick.ac.uk/58964/.

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The microflora of two acidic environments was investigated using analysis of 16S rDNA amplified by the polymerase chain reaction (PCR) from environmental DNA. These environments had different chemical characteristics from most of the acidic environments studied by others. The first sample site, a coal spoil (Birch Coppice, Warwickshire), might have been expected to produce niches enriched in humic matter. The second, comprising geothermal vents on the Island of Vulcano, was unusual for natural acidic environments since it was saline. Three vent regions of different temperatures (30°C, 45°C and

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9

Tsang, J. S. H. "The physiology and genetics of bacterial dehalogenases." Thesis, University of Kent, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380588.

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10

Melendrez, Melanie Crystal. "Population genetics of Synehococcus species inhabiting the Mushroom Spring microbial mat, Yellowstone National Park." Thesis, Montana State University, 2010. http://etd.lib.montana.edu/etd/2010/melendrez/MelendrezM0510.pdf.

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The species concept in microbiology is under considerable debate. Some scientists believe that traditional approaches are adequate, while others search for more natural concepts. The ecotype concept (ecological species concept) was evaluated in this work. Two temperature sites of a well-studied microbial mat system in Yellowstone National Park were investigated. Previous molecular analyses with 16S rRNA and the adjacent internal transcribed spacer (ITS) suggested the dominance of two putative ecotypes (PEs) of cyanobacteria in these sites, Synechococcus genotypes A and B'. Higher resolution mo

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11

Al-Ani, Bahjat S. "Studies on extracellular protein gene expression in Staphylococcus aureus." Thesis, University of Nottingham, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.277372.

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12

Miller, Philip F. P. "Involvement of Ca2+ in the regulation of apical growth and branching in the pathogenic fungus Aspergillus fumigatus." Thesis, University of Aberdeen, 1993. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU053094.

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Calcium has been shown to play important roles in the control of tip growth in a wide range of cell types. This thesis sets out to test the effects of exogenous Ca2+ on various morphological events during the life cycle of the human pathogenic fungus Aspergillus fumigatus. The Ca2+ chelating agent EGTA induced marked morphological effects on colonies of A.fumigatus. That is radial growth rate decreased and branching frequency increased with increasing concentration of EGTA. Ion substitution experiments indicated that these effects were due to the chelation of Ca2+ and not Mg2+, Zn 2+, Cu2+ or

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13

Imamura, Kely Braga. "Caracterização funcional de um fator de transcrição hipotético no fungo Neurospora crassa /." Araraquara, 2015. http://hdl.handle.net/11449/135929.

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Orientador: Maria Célia Bertolini<br>Co-orientador: Rodrigo Duarte Gonçalves<br>Banca: Iran Malavazi<br>Banca: Márcia Eliana da Silva Ferreira<br>Resumo: O fungo Neurospora crassa tem sido amplamente utilizado como organismo modelo para o estudo de alguns aspectos da biologia em eucariotos. O sequenciamento de seu genoma permitiu analisar funcionalmente diversos fatores de transcrição e, portanto, atribuir função a proteínas anotadas como hipotéticas. Neste estudo, está sendo investigado o papel funcional do produto de ORF NCU01629, um fator de transcrição que pertence à família zinc-finger se

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14

Andrade, Fontes Carlos Mendes Godinho de. "Characterization of a microbial xylanase and its expression in mammalian cells." Thesis, University of Newcastle Upon Tyne, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294720.

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15

Xia, Yu, and 夏雨. "Exploring microbial structure and carbohydrate metabolism of thermophilic anaerobic cellulose-degrading consortia by metagenomics based on next generation sequencing." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/195961.

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The pressing need for clean renewable energy sources has aroused worldwide research interest on the exploration of biofuels produced from lignocellulosic feedstock (e.g. forestry or agricultural residues and municipal wastes). The general absence of cost-effective method to overcome the recalcitrant nature of cellulosic biomass is the major challenge for the industrialization of this so-called second-generation biofuel. With the purpose to enhance our understanding of the fundamental mechanism of thermophilic microbial cellulose conversion process, we used culture-independent metagenomic analy

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16

Carlton, Timothy M., and n/a. "Iron and microevolution in Mesorhizobia." University of Otago. Department of Microbiology & Immunology, 2006. http://adt.otago.ac.nz./public/adt-NZDU20070215.154441.

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Genome plasticity in soil bacteria is predicted to be evolutionarily advantageous, allowing bacteria to sample genetic variation for adaptation to local soil ecology. In the field population of mesorhizobia where the symbiosis island (ICEMlSym[R7A]; an I̲ntegrative C̲onjugative E̲lement) was first identified, individual members were found to have significant chromosomal variation downstream of the phe-tRNA gene or phe-tRNA integrated ICEMlSym[R7A]. However, the nature of this genetic variation and whether it contributed to the adaptation of the indigenous mesorhizobia to their field environmen

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17

Mazzon, Ricardo Ruiz. "Estudo de genes de Caulobacter crescentus importantes para a sobrevivência em baixas temperaturas." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/42/42132/tde-20032012-162702/.

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Caulobacter crescentus sobrevive em baixas temperaturas e mostrou ser um organismo psicrotolerante e de alta resistência ao congelamento, característica resultante de múltiplos fatores. C. crescentus possui quatro genes codificantes para CSPs, sendo cspA e cspB induzidos em baixas temperaturas e cspB, cspC e cspD em fase estacionária. A ausência de cspA e cspB ou cspA e cspC confere grande deficiência de crescimento em baixas temperaturas. cspA e cspB não são autorregulados e são regulados pós-transcricionalmente via estabilização de seu mRNA e traducionalmente após o choque-frio. A expressão

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18

McCallum, Mark Edward. "Genetic studies of xanthomonas maltophilia." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/25214.

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19

White, Patricia McGuire. "Genetic studies of P̲s̲e̲u̲d̲o̲m̲o̲n̲a̲s̲ m̲a̲lt̲o̲p̲h̲i̲l̲i̲a̲." Diss., Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/31068.

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20

Scanferlato, Vjera Sostarec. "Environment risk assessment for toxic chemicals and genetically-engineered microorganisms : a microcosm approach /." Diss., This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-07282008-135357/.

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21

Kirke, David F. "Protein-nucleic acid interactions regulating bacterial quorum sensing." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364668.

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22

Benjamin, Ashlee. "Genetic elements of microbes : a comprehensive and integrated genomic database application /." Online version of thesis, 2009. http://hdl.handle.net/1850/10833.

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23

Massini, Karen Cristina. "Bioprospecção de genes biossintéticos de policetídeos em DNA metagenômico de solo de Mata Atlântica." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/42/42132/tde-29012010-111747/.

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A Mata Atlântica brasileira é apontada como um dos mais importantes refúgios da biodiversidade em todo o planeta. Este bioma é extremamente importante sob o aspecto da riqueza de espécies vegetais e animais na sua composição e interações, porém ainda pouco conhecido e explorado sob o ponto de vista microbiológico. Um grama de solo pode conter cerca de 10 bilhões de micro-organismos de diferentes espécies. A maioria dos micro-organismos presentes nos solos não é de fácil cultivo em laboratório (somente 0.1-10% são recuperados), sendo necessária à utilização de novas técnicas para superar este p

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24

Ryan-Kewley, Angela E. "Microbial ecology of Propionibacterium acnes in patients undergoing treatment with isotretinoin." Thesis, University of Lincoln, 2011. http://eprints.lincoln.ac.uk/6073/.

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Following failure to respond to antibiotic therapy, 56 patients (mean age 22yrs; range 15-46yrs) with recorded active Acne vulgaris were treated with a standard course of isotretinoin (1mg/kg body weight for 16 weeks). This study investigated the recovery and analysis of skin surface organisms from several skin sites at the start of treatment, 8 weeks into treatment, at the end of the course and 1 month post treatment. The number of anaerobic isolates - presumptive Propionibacterium acnes and also aerobic isolates recovered by appropriate media from each of three specific sites per patient wer

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25

Isherwood, Karen Elizabeth. "Quorum sensing in Yersinia pestis." Thesis, University of Nottingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364667.

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26

Escoda, Assens Lídia. "Applications of next-generation sequencing in conservation genomics: kinship analysis and dispersal patterns." Doctoral thesis, Universitat de Barcelona, 2018. http://hdl.handle.net/10803/586083.

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Knowledge of the genealogical relationships among individuals of a population and their dispersal patterns are essential to many studies of endangered species, especially those with small and fragmented populations. The main objective of this doctoral thesis is to use genomic data obtained with next-generation sequencing techniques to infer contemporary dispersal patterns of species from relatedness networks, to construct pedigrees from kinship categories, and to quantify the effect of anthropogenic and geographic barriers on the dispersal of individuals, using as a model the Pyrenean desman (

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27

Costa, Débora dos Santos. "Estudo da frequência do fenótipo mutador para resistência aos antibióticos beta-lactâmicos em linhagens de E. coli patogênicas." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/42/42132/tde-18062013-110739/.

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Atualmente a alta incidência de isolados multirresistentes a antibióticos utilizados na clinica tem-se tornado alarmante. Estudos recentes demonstraram que um dos motivos que contribuem para o aumento da resistência a antibióticos em bactérias é a ocorrência de linhagens que apresentam o fenótipo mutador. Deficiências nos genes do complexo mut, que incluem os sistemas de reparo dependente de metilação (MMR do inglês methyl-directed mismatch repair), e o sistema de reparo oxidativo (GO) podem gerar linhagens com um fenótipo mutador, que, por sua vez, levam ao aumento das taxas mutacionais esp

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Dhladhla, Busisiwe I. R. "Enumeration of insect viruses using microscopic and molecular analyses: South African isolate of cryotophlebia leucotreta granulovirus as a case study." Thesis, Nelson Mandela Metropolitan University, 2012. http://hdl.handle.net/10948/d1008395.

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Baculoviruses have been used as biocontrol agents to control insect pests in agriculture since the 1970s. Out of the fifteen virus families known to infect insects, baculoviruses offer the greatest potential as insect biopesticides, due to their high host specificity which makes them extremely safe to humans, other vertebrates, plants and non-target microorganisms. They comprise of two genera: nucleopolyhedroviruses (NPVs) and granuloviruses (GVs). The South African isolate of Cryptophlebia leucotreta granulovirus (CrleGV-SA) which is infectious for the false codling moth (FCM), Thaumatotibia

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Bellerose, Michelle M. "Genetic Identification of Novel Mycobacterium tuberculosis Susceptibility and Survival Mechanisms During Antibiotic Treatment." eScholarship@UMMS, 2020. https://escholarship.umassmed.edu/gsbs_diss/1081.

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Effective treatment of tuberculosis requires at least six months of combination therapy involving four antibiotics. Alterations in the physiological state of Mycobacterium tuberculosis during infection may reduce drug efficacy and prolong treatment, but these adaptations are incompletely defined. To investigate the mechanisms limiting antibiotic efficacy, I performed a comprehensive genetic study to identify M. tuberculosis genes and pathways important for bacterial survival during antibiotic treatment in vivo. First, I identified mutants in the glycerol kinase enzyme, GlpK, that promote survi

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Krallis, Myrsini. "Isolation and identification of Beta-Lactam Producing Microorganisms using PCR based methodologies." Thesis, Rhodes University, 1997. http://hdl.handle.net/10962/d1018237.

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The polymerase chain reaction (PCR) was investigated as a potential tool in microbial screening for 13-lactam. producing organisms. Optimization of PCR conditions and the addition of acetamide to the PCR reaction allowed for the successful amplification of the isopenicillin N synthetase (lPNS) gene in S. clavuligerus, S. tanashiensis, S. griseus, S. olivaceus, S. lipmanii, and S. chartreusis. PCR was used to produce a radiolabelled probe from S. clavuligerus that was used to detect analogous genes in bacteria and fungi. Southern blot and dot blot analysis using the lPNS probe revealed the pres

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Dalmolin, Keina Poliana Pivarro. "Clonagem de um alelo do gene SPT15 em Saccharomyces cerevisiae para aumento da produção de etanol." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/87/87131/tde-15092011-142026/.

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Alper e colaboradores demonstraram que a linhagem BY4741 recombinante portadora de cópias adicionais de um alelo SPT15 mutagenizado em três diferentes posições (spt15-300) utiliza mais rapidamente a glicose e aumenta a produção de etanol. Neste trabalho, foi realizada a clonagem deste alelo, aqui chamado spt15*. Inicialmente o DNA genômico da linhagem S. cerevisiae S288C foi utilizado como molde para amplificação por SOEing-PCR. O alelo spt15* foi clonado no plasmídeo pGEMT-Easy e, em seguida, introduzido no plasmídeo epissomal pMA91. Após construções moleculares, foi obtido o fragmento de DN

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Laubscher, Inge. "Characterisation of plasmid p31T1 isolated from Aeromonas." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85725.

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Thesis (MSc)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: Plasmids are an integral part of the horizontal gene pool and, therefore, are the main vectors for the spread of antibiotic and heavy metal resistance genes in the environment. Functional and taxonomic characterization of novel plasmids is, therefore, central to our general understanding of plasmid biology and their contribution to microbial evolution. Two 14-kb mobilizable plasmids, p31T1 and p36T2, conferring resistance to tetracycline were isolated from the opportunistic fish pathogens Aeromonas sobria and Aeromonas hyd

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Sinotte, Christopher Matthew. "Construction, expression, and purification of soluble CD16 in bacteria." Thesis, Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-05142006-222347/.

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Thesis (M.S.)--Bioengineering, Georgia Institute of Technology, 2007.<br>Zhu, Cheng, Committee Chair ; Selvaraj, Periasamy, Committee Member ; Orville, Allen, Committee Member ; Butera, Robert, Committee Member.

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Barcellos, Fernando Gomes. "Caracterização genética e citológica da recombinação somática em Trichoderma pseudokoningii." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/11/11137/tde-04112002-164855/.

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Com o objetivo de se caracterizar o processo de recombinação somática em Trichoderma pseudokoningii foram feitos cruzamentos via anastomose de hifas entre duas linhagens contrastantes para quatro marcadores de auxotrofia, coloração dos conídios e marcadores de RAPD. Foram feitos quatro cruzamentos, sendo analisados um total de 1052 colônias obtidas a partir de suspensões de conídios provenientes das colônias heterocarióticas. Sessenta e oito colônias recombinantes foram analisadas quanto às marcas de auxotrofia em quatro gerações de crescimento, sendo observado que 58 mantiveram o fenótipo rec

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35

Keiser, Tracy Lynn. "Biosynthesis of mannose-containing cell wall components important in Mycobacterium tuberculosis virulence." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1397762377.

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Ho, Brian Thomas. "Characterization of the Antibacterial Activity of the Type VI Secretion System." Thesis, Harvard University, 2013. http://dissertations.umi.com/gsas.harvard:11241.

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This dissertation summarizes advances made toward understanding of the composition, structure, mechanism, and regulation of the bacterial type VI secretion system (T6SS). The T6SS is a widely conserved bacterial nanomachine used by Gram-negative bacteria to deliver toxic effector proteins into the extracellular environment or into adjacent target cells. Systematic deletion of open reading frames present in the Vibrio cholerae T6SS gene cluster revealed the genes essential for T6SS activity and provided key insights into understanding the mechanism by which this organelle is assembled and its c

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Cordova, Caio Mauricio Mendes de. "Desenvolvimento de plasmídeos replicativos artificiais para transformação de Mycoplasma pulmonis, M. capricolum e M. mycoïdes subsp. mycoïdes, e dirupção do gene da hemolisina A de M. pulmonis por recombinação homóloga." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/9/9136/tde-20082008-112933/.

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Os micoplasmas são os menores microrganismos capazes de autoreplicação conhecidos na natureza, responsáveis por uma série de doenças no homem e nos animais, infectando ainda plantas e insetos. Constituem um grande grupo de bactérias, ordenadas em diferentes gêneros na classe Mollicutes, cuja principal característica em comum, além do genoma reduzido, é a ausência de parede celular. Mycoplasma mycoïdes subsp. mycoïdes SC, responsável pela Pleuropneumonia Contagiosa Bovina, foi o primeiro microrganismo desta classe de bactérias a ser identificado. Esta é uma doença bastante grave, com altas taxa

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Silva, Carlos Henrique Domingues da. "Fungos associados a invertebrados marinhos: isolamento, seleção e avaliação da produção de enzimas celulolíticas." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/87/87131/tde-30092010-110051/.

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A micologia marinha é uma ciência relativamente recente e pouco se conhece sobre a diversidade das suas comunidades. Assim, o isolamento, triagem e preservação de fungos derivados do mar podem levar à descoberta de novas tecnologias. O objetivo deste estudo foi conhecer a diversidade de fungos filamentosos derivados marinhos e selecionar isolados capazes de produzir enzimas celulolíticas. Para tanto, foram isolados seletivamente fungos filamentosos a partir de amostras de macro-organismos marinhos coletados em 2007 e 2008. Os resultados demonstraram uma ampla diversidade de fungos potencialmen

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Miranda, Ceres Maciel de. "Expressão de microplusina em Aedes aegypti: avaliação do efeito sobre Plasmodium gallinaceum." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/42/42135/tde-04082011-091317/.

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A transmissão de parasitas da malária por mosquitos vetores é dependente do desenvolvimento bem sucedido das formas infectantes de Plasmodium sp., especialmente os esporozoítas, que são as formas que infectam o hospedeiro vertebrado. A manipulação genética de mosquitos vetores tem sido uma estratégia alternativa na tentativa de controle da malária. Um componente extremamente importante desta estratégia é a escolha de uma molécula efetora capaz de reduzir a transmissão do patógeno. Microplusina é um peptídeo antimicrobiano rico em cisteína, originalmente descrito como um componente antimicrobia

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Butler, Vanessa Leanne. "The effects of genetics, age and rearing environment on AvBD gene expression and gut anti-microbial activities in three chicken lines." Thesis, University of Newcastle upon Tyne, 2010. http://hdl.handle.net/10443/2240.

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The defensins have been shown to be an important component of the innate immune system across many species from plants to man. To date a total of 14 beta defensins have been identified within the chicken genome and anti-microbial activity of an array of these peptides against pathogens has been demonstrated. The innate immune system has been shown to be important in chickens during the first week of life when exposure to pathogens in the environment occurs and the adaptive immune system is not fully developed. The research presented in this thesis attempts to investigate the effects of bird ag

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Ferreira, Almir José. "Diversidade e estrutura da comunidade bacteriana associada às armadilhas da planta carnívora Utricularia gibba (Lentibulariaceae) e ao ambiente aquático." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/87/87131/tde-10022012-162729/.

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A diversidade microbiana em ambientes aquáticos e sua associação com plantas carnívoras ainda é pouco estudada. Assim, a comunidade bacteriana da planta carnívora Utricularia gibba e do seu meio aquático foi avaliada por meio do seqüenciamento em larga escala (454 Roche) de uma biblioteca do gene 16S rRNA. Os resultados indicaram que a comunidade bacteriana na água é significativamente diferente da comunidade dos utrículos. Além disso, a comunidade bacteriana da água é composta principalmente por membros dos filos Proteobacteria, Actinobacteria, Firmicutes e Verrucomicrobia, enquanto que a com

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Chella, Krishnan Karthickeyan. "Host-Pathogen Interactions Promoting Pathogen Survival and Potentiating Disease Severity & Morbidity in Invasive Group A Streptococcal Necrotizing Soft Tissue Infections." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1446546952.

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Hotaling, Scott. "GENETIC PERSPECTIVES ON BIODIVERSITY IN ROCKY MOUNTAIN ALPINE STREAMS." UKnowledge, 2017. http://uknowledge.uky.edu/biology_etds/44.

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In alpine regions worldwide, climate change is dramatically altering ecosystems, affecting biodiversity across habitats and taxonomic scales. For streams, the associated recession of mountain glaciers and snowfields, paired with altered precipitation regimes, are driving shifts in hydrology, species distributions, and basal resources – often threatening the very existence of some habitats and biota. Globally, alpine streams harbor particularly substantial species and genetic diversity due to significant habitat insularity and environmental heterogeneity: however, anthropogenic warming threaten

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Moffo, Nathan. "Differential Analysis of Unique Genes Expressed in Stenotrophomonas maltophilia Strain OR02 in Response to Selenite." Youngstown State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ysu15663177454459.

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Gillan, David. "Morpho-physiology, genetics and ecological aspects of marine microbial biofilms :the study of the iron-encrusted biofilm associated with Montacuta ferruginosa (Mollusca, Bivalvia)." Doctoral thesis, Universite Libre de Bruxelles, 1999. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211930.

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Marcangione, Luigi. "Isolation of a Pseudomonas aeruginosa PAOI gene involved in 3-hydroxybutyrate catabolism." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0031/MQ64403.pdf.

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Hartmann, Kaitlin Ash. "Cronobacter sakazakii Genes Contributing to Persistencein Low-Moisture Dairy Matrices." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8466.

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Cronobacter sakazakii is a gram-negative opportunistic pathogen known to survive in dry environments and food matrices, such as infant formula. This foodborne bacterium can cause fatal human infections of the blood, central nervous system, and gastrointestinal tract; it is also problematic in wounds and urinary tract infections. Preterm infants and immunocompromised individuals are in higher risk categories related to necrotizing enterocolitis, neonatal sepsis, and meningitis due to this organism. Therefore, there is a need for increased understanding of how this bacterium is able to persist i

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Pallu, Ana Paula de Souza. "Potencial biotecnológico de fungos de gênero Penicillium e interação com cana-de-açúcar." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/11/11137/tde-17092010-152316/.

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Os fungos endofíticos têm sido reconhecidos pela sua grande importância para as plantas hospedeiras, pois podem conferir proteção contra insetos herbívoros e patógenos, promover o crescimento vegetal, além de produzir metabólitos secundários com atividades biológicas diversas, entre outros. A cana-de-açúcar é uma cultura de grande importância social e econômica no Brasil, especialmente para o estado de São Paulo. Ultimamente esta cultura vem recebendo especial atenção devido ao crescente aumento da demanda de matéria prima, principalmente em função do acréscimo no consumo de etanol como biocom

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Sánchez, Vanessa. "Characterization of Rhizobial Diversity and Relationship of Rhizobial Partner and Legume Performance in Four South Florida Pine Rockland Soils." FIU Digital Commons, 2014. http://digitalcommons.fiu.edu/etd/1124.

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Pine rocklands are endangered ecosystems unique to south Florida, the Bahamas and Cuba. As a result of their karstic calcium carbonaterich soil, these systems are limited in phosphorus and nitrogen, making symbiotic associations critical to plant growth. Four leguminous species (Cajanus cajan, Chamaecrista fasciculata, Tephrosia angustissima, and Abrus precatorious) were used to determine the relationship between rhizobial partners and plant performance, and the symbiosis related gene nifH was amplified to characterize the diversity of rhizobial symbionts. Plants were grown in soils from four

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Ministro, Joana Henriques. "Role of ß-lactamase operon on mecA expression in Staphylococcus aureus." Master's thesis, Faculdade de Ciências Médicas, 2011. http://hdl.handle.net/10362/6657.

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RESUMO: Os Staphylococcus aureus resistentes à meticilina (MRSA, do inglês “methicillin-resistant Staphylococcus aureus”) são um dos principais agentes responsáveis por infeções hospitalares. Os MRSA são resistentes a praticamente todos os antibióticos β-lactâmicos devido a dois mecanismos principais: produção de β-lactamase (bla), codificada pelo gene blaZ, e produção de uma proteína de ligação à penicilina (PBP2a, do inglês “penicillin binding protein 2”), codificada pelo gene mecA. Estes dois genes são regulados por sistemas homólogos, constituídos por um sensor-transdutor (BlaR1 e MecR1)

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