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Dissertations / Theses on the topic 'Polyphasic'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Kim, Bongcheol. "Polyphasic taxonomy of thermophilic actinomycetes." Thesis, University of Newcastle Upon Tyne, 1999. http://hdl.handle.net/10443/1757.

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Molecular systematic methods were applied in a series of studies designed to resolve the taxonomic relationships of thermophilic actinomycetes known to be difficult to classify using standard taxonomic procedures. The test strains included representatives of clusters defined in an extensiven umerical phenetic survey of thermophilic streptomycetesa nd twelve marker strains. The resultant genotypic data together with the results of corresponding phenotypic studies were used to highlight novel taxa and to improve the circumscription of validly described species. The most comprehensive study was u

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Mheen, Hye Sook. "Computer program for polyphasic taxonomy." Thesis, University of Newcastle Upon Tyne, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299419.

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Maldonado, Luis Angel. "Polyphasic taxonomy of members of the genus Nocardia." Thesis, University of Newcastle Upon Tyne, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246690.

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Eraclio, G. "POLYPHASIC APPROACH TO STUDY THE EMERGING PATHOGEN LACTOCOCCUS GARVIEAE." Doctoral thesis, Università degli Studi di Milano, 2015. http://hdl.handle.net/2434/333486.

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This Ph.D. thesis research project aims to increase knowledge on emerging and opportunistic pathogens in food, to improve the current systems of management and control of food safety. During the project, the attention was focused on the study of Lactococcus garvieae, the aetiological agent of a hemorrhagic septicemia in aquaculture, but recently recognized as an opportunistic human pathogen. In the first part of the research, strains of L. garvieae coming from different niches were studied through a Multi Locus Sequence Typing approach and genome analysis and comparison. Data highlighted a hi

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Sukhoom, Ampaitip. "Selective isolation and characterisation of rhodococci for use in bioremediation." Thesis, University of Newcastle Upon Tyne, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299635.

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Kim, Sam-Bong. "Polyphasic taxonomic studies on the genus Saccharomonospora and related taxa." Thesis, University of Newcastle Upon Tyne, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262140.

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7

CAGGIANIELLO, GRAZIANO. "Polyphasic characterization of exopolysaccharides produced by Lactobacillus plantarum Lp90 strain." Doctoral thesis, Università di Foggia, 2015. http://hdl.handle.net/11369/337541.

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ABSTRACT Introduction Lactic acid bacteria (LAB) occur in a variety range of fermented foods. Lactobacillus plantarum is a widespread LAB species which is encountered in diverse niches and some L. plantarum strains have been recognized as probiotics. Several LAB are able to secrete exopolysaccharides (EPS), which can be either highly adherent or loosely bound to the microbial cell surface, thus distinguished into capsular and secreted forms, respectively; they are thought to provide protection against adverse environment. The ability to produce EPS by LAB has been reported to be strictly c

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Juck, David F. "Polyphasic examination of microbial communities in soils contaminated with organic pollutants." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=38209.

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A polyphasic approach was used to examine the impact of contamination on soil microbial community structure. Two systems were examined using a combined biochemical and molecular biological approach. Petroleum hydrocarbon contaminated soils from two Northern Canadian sites, representing long-term contamination, were examined using Biolog GN plates and PCR-denaturing gradient gel electrophoresis (DGGE) analysis of total community 16S rDNA. Results obtained using both methods demonstrated a positive correlation between samples that was based on the geographical origin of the samples, not on conta

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Johnson-Rollings, Ashley S. "A polyphasic approach to the study of chitinolytic bacteria in soil." Thesis, University of Warwick, 2012. http://wrap.warwick.ac.uk/51637/.

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Chitin is the most abundant nitrogen-containing polymer in nature, with >1x10 10 tonnes produced annually in terrestrial and marine habitats. Chitinolytic bacteria are able to degrade this recalcitrant substrate through a multiplicity of chitinases. A polyphasic approach was taken to studying these organisms within three diverse soil communities. Fluorometric assays employing 4-methylumbelliferyl-labelled chitinooligosaccharides were used to estimate basal soil chitinase activity as well as its chitinolytic potential in response to a- and b-chitin amendment. A molecular approach was adopted to

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Rocha, Rafael dos Santos. "Polyphasic characterization of heterotrophic bacteria from shrimp farm environments to tetracyclines." Universidade Federal do CearÃ, 2016. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=16669.

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CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior<br>Antimicrobial agents of tetracycline class has been extensively used in aquaculture for disease control and growth promotion. Thus, the aim of this study was to evaluate the polyphase profile of the bacterial community in shrimp farming environment front antimicrobial classes of tetracyclines, focusing on Vibrio genus. Water and sediment samples were collected four (4) shrimp farms: two (2) in the state of CearÃ and two (2) in the state of Rio Grande do Norte, of points: estuary, supply channel, pond and drainage channel. Cultivable

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Mawlankar, R. "Polyphasic systematics of marine bacteria and their alpha-glucosidase inhibitor activity." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2020. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/5847.

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Microbes are the most diverse group of organisms present on the earth. Microbial diversity is the variety and variability of an organism’s and the ecosystem in which they occur. Microbes have been adapted to global environmental changes as and when it happened on the earth.The enormous microbial diversity also gives rise to a largely untapped amount of genetic information, bioactive compounds and biomaterials which could deliver important beneficial traits and applications of societal interest, for example, to improve the medical treatments,fisheries and aquaculture applications, supply of ene

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12

Rodriguez-Diaz, Marina. "Application of miniaturized identification systems to the polyphasic taxonomy of Bacillus and relatives." Thesis, Glasgow Caledonian University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414866.

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13

Visagie, Cobus Meyer. "The polyphasic taxonomy of penicillium and talaromyces spp. isolated from the diverse Fynbos biome." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71947.

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14

ZAMMIT, GABRIELLE. "A non-invasive approach to the polyphasic study of phototrophic biofilms colonising Maltese hypogea." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2010. http://hdl.handle.net/2108/1359.

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Questo studio polifasico ha permesso di descrivere i biofilm fototrofi che si sviluppano sui dipinti murali presenti negli ipogei maltesi. L’architettura dei biofilm è stata caratterizzata tramite microscopia confocale (CLSM) ed elettronica a scansione (SEM) e la distribuzione, diversità e ruolo ecologico di cianobatteri e microalghe nei biofilm studiata dal punto di vista citomorfologico e genetico. La comprensione dei processi di biodeterioramento e biomineralizzazione è stata resa possibile grazie all’applicazione di tecniche quali la microsonda a raggi X (ESEM-EDS), la fluorescenza X (μXR

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Smyth, Taylor Stephen. "Losing Sleep: A Preliminary Investigation of the Cognitive Effects that Arise from Polyphasic Sleep Cycles." Thesis, The University of Arizona, 2013. http://hdl.handle.net/10150/297764.

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A four week investigation of the cognitive and physiological effects that polyphasic sleep had on a human subject. The subject was put onto Uberman’s sleep schedule and took cognitive tests for four weeks measuring memory, concentration and problem solving skills. Additionally weight, food intake, and dreams were recorded. After two weeks exercise one hour of anaerobic exercise was introduced. From the data recorded there was no significant variance in cognitive ability due to change of sleep pattern yet there was a noticeable weight change.

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Jangir, Monika. "Polyphasic approach for assaying the roles of biocontrol agents against Fusarium wilt in Solanum Lycopersicum." Thesis, IIT Delhi, 2019. http://eprint.iitd.ac.in:80//handle/2074/8089.

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BRITO, NETTO Mariote dos Santos. "Espécies de lasiodiplodia associadas à podridão peduncular em mamão no nordeste do Brasil." Universidade Federal Rural de Pernambuco, 2012. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6627.

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Submitted by (lucia.rodrigues@ufrpe.br) on 2017-03-22T12:38:56Z No. of bitstreams: 1 Mariote dos Santos Brito Netto.pdf: 2798345 bytes, checksum: 06d5992ae421bc76a692bd417a393470 (MD5)<br>Made available in DSpace on 2017-03-22T12:38:56Z (GMT). No. of bitstreams: 1 Mariote dos Santos Brito Netto.pdf: 2798345 bytes, checksum: 06d5992ae421bc76a692bd417a393470 (MD5) Previous issue date: 2012-07-31<br>Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq<br>The identity of Lasiodiplodia species in causing stem-end rot papaya is reveal. In the current study the Lasiodip

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Espinoza, dela Cruz Thomas Edison. "Marine Dendryphiella species from different geographical locations an integrated, polyphasic approach to its taxonomy and physioecology /." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=980409624.

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Madoroba, E., and NB Momba. "Prevalence of Vibrio cholerae in rivers of Mpumalanga province, South Africa as revealed by polyphasic characterization." African Journal of Biotechnology, 2010. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001241.

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Cholera is a life-threatening diarrhoeal disease, which mainly affects inhabitants of developing countries due to poor socio-economic conditions and lack of access to potable water and sanitation. Toxigenic Vibrio cholerae are the aetiological agents of cholera. These bacteria are autochthonous to aquatic environments, hence water plays a central role both in the epidemiology and transmission of cholera. The aim of this study was to determine the prevalence of V. cholerae from 32 sites of major rivers in Mpumalanga province of South Africa using a polyphasic approach. Water samples (594) colle

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Channaiah, Lakshmikantha H. "Polyphasic characterization of antibiotic resistant and virulent Enterococci isolated from animal feed and stored-product insects." Diss., Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/1392.

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Lekota, Kgaugelo Edward. "Polyphasic and genome characterization of Bacillus species from anthrax outbreaks in animals in South Africa and Lesotho." Diss., University of Pretoria, 2013. http://hdl.handle.net/2263/79270.

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Bacillus anthracis, B. cereus, B. mycoides, B. pseudomycoides, B. thuringiensis and B. weihenstephanensis belong to the B. cereus group (B. cereus sensu lato). Bacillus anthracis is a causative agent of anthrax that primarily affects herbivores. In South Africa, anthrax occurs sporadic and is endemic or epidemic in the Northern Cape Province (NCP) and Kruger National Park (KNP). The Agricultural Research Council- Onderstepoort Veterinary (ARC-OVI) Institute is a national reference laboratory for diagnosis of anthrax. The ARC-OVI reference laboratory received isolates that were reported as anth

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BELLEZZA, SIMONA. "A Polyphasic approach to the study of EPS-producing heterocystous cyanobacteria from biofilms in Roman hypogean monuments." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2008. http://hdl.handle.net/2108/603.

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Roman hypogea (e.g. the Roman catacombs) are man-made low-light environments of great archaeological and cultural interest. Few species of cyanobacteria are able to colonise the lithic surfaces inside the catacombs, where they live in close vicinity to the artificial lamps associated with green algae, diatoms and bacteria in the life-form of biofilms. Biofilm formation is due to the production of an exopolymeric matrix mostly composed of exopolysaccharides and it is well known that these polymers are involved in the aesthetic and structural alteration of the properties of artistic surfaces (bi

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23

Charry, Prada Iran David. "Etude et conception de réacteurs polyphasés en vue de la désulfuration de biogaz en pré- et post- combustion." Thesis, Paris Sciences et Lettres (ComUE), 2019. http://www.theses.fr/2019PSLEM019/document.

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Le biogaz est une source d’énergie qui intéresse de plus en plus l’Europe et notamment la France pour ses avantages environnementaux et économiques. Produit de la fermentation de matière organique, il contient du biométhane. Ce dernier est une alternative plus durable aux énergies fossiles. Cependant, à l’état brut, les polluants dans le biogaz peuvent provoquer des dégâts sur la santé et l’environnement, notamment en raison de la présence de siloxanes et des composés soufrés. L’objectif de cette recherche consiste donc à développer des méthodes améliorant à la fois économiquement et écologiqu

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Lopes, Aline de Souza 1979. "Catalogação das espécies potencialmente toxigênicas das Aspergillus : ocorrência, taxonomia polifásica, distribuição e preservação." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/254592.

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Orientador: José Luiz Pereira<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-21T13:27:50Z (GMT). No. of bitstreams: 1 Lopes_AlinedeSouza_M.pdf: 1681631 bytes, checksum: f77820cebe02c8058ad8b01cc2f36a6e (MD5) Previous issue date: 2012<br>Resumo: O gênero Aspergillus é um grupo de fungos que possui diversas espécies produtoras de micotoxinas, distribuídas principalmente em três seções denominadas de Nigri, Flavi e Circumdati. Estudos para isolamento destas espécies estão sendo executados para se conhece

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VIEIRA, Willie Anderson dos Santos. "Prevalência de isolados de Colletotrichum spp. endofíticos em mangueira." Universidade Federal Rural de Pernambuco, 2012. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6664.

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Submitted by (lucia.rodrigues@ufrpe.br) on 2017-03-23T16:20:44Z No. of bitstreams: 1 Willie Anderson dos Santos Vieira.pdf: 939430 bytes, checksum: b3f788b1dafa1b55d7a74abaf64a9110 (MD5)<br>Made available in DSpace on 2017-03-23T16:20:44Z (GMT). No. of bitstreams: 1 Willie Anderson dos Santos Vieira.pdf: 939430 bytes, checksum: b3f788b1dafa1b55d7a74abaf64a9110 (MD5) Previous issue date: 2012-02-28<br>Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq<br>In the current study the Colletotrichum species isolated from mango in Pernambuco state in Brazil are describ

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Amadi, E. N. "Micrococcus systematics : A polyphasic taxonomic study of the internal structure of the genus Micrococcus and its suprageneric relationship to allied actinomycete taxa." Thesis, University of Bradford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373216.

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BORGO, FRANCESCA CLAUDIA. "Individuazione e tipizzazione polifasica di ecotipi funzionali di batteri lattici coinvolti nelle produzioni casearie italiane." Doctoral thesis, Università degli Studi di Milano, 2008. http://hdl.handle.net/2434/164585.

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This PhD thesis dealt with the phenotypic and genotypic characterization of LAB strains through a polyphasic taxonomic approach, molecular analyses such as PCR, ITS, ARDRA, the study of housekeeping genes, search and classification of plasmidic DNA. The integration of the phenotypic, biotechnological and genotypic results allowed the obtainment of fingerprinting specific at the strain-level and the possible discrimination of the strains in function of their ecological niches.

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Correia, Petra Karina Morais. "Diversidade molecular em estirpes de Pseudomonas savastanoi isoladas de nódulos de Olea europaea L. portuguesa." Master's thesis, Universidade de Évora, 2007. http://hdl.handle.net/10174/16350.

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Pseudomonas savastanoi provoca a doença dos nódulos de oliveira. Neste estudo aplicou‐se uma abordagem polifásica na caracterização de isolados (produtores de IAA) obtidos a partir de nódulos de três variedades de oliveira. Aplicaram‐se testes fenotípicos clássicos e moleculares, nomeadamente para deteção do gene iaaL, PCR‐RFLPs do rDNA 16S e 'fingerprinting' genómico por BOX‐, ERIC‐ e REP‐PCR. Obteve‐se uma grande heterogeneidade fenética entre isolados identificados como P. savastanoi. Recorreu‐se à sequenciação do rDNA 168 e verificou‐se que apenas um isolado apresentava homologia com P. sa

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Abreu, Filho Benicio Alves de. "Caracterização taxonomica de linhagens de Alicyclobacillus ssp. isolados na industria de suco concentrado de laranja." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/256662.

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Orientadores: Gilson Paulo Manfio, Valeria Maia de Oliveira<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-04T23:38:45Z (GMT). No. of bitstreams: 1 AbreuFilho_BenicioAlvesde_D.pdf: 6208226 bytes, checksum: e8676e4b88ce9781e64eda102999921b (MD5) Previous issue date: 2005<br>Resumo: Trinta linhagens de bactérias acidotermofílicas isoladas do processamento industrial de suco de laranja concentrado congelado (Frozen Concentrated Orange Juice, FCOJ) em diferentes regiões do estado de São Paulo foram estudadas, u

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Dantas, Vânia Patrícia Gonçalves. "Caracterização polifásica de fungos filamentosos zygomycetes com interesse em biotecnologia ambiental." Master's thesis, Universidade de Évora, 2015. http://hdl.handle.net/10174/14995.

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Neste trabalho desenvolveram-se estudos de identificação e classificação taxonómica de fungos Mucorales, dos géneros Absidia, Circinella, Cunninghamella, Gongronella e Rhizopus, com vista a correlacionar microrganismos do mesmo taxa e a construir um esquema de identificação polifásica com integração de dados morfológicos, proteómicos e genómicos. Procedeu-se à caracterização micro- e macro- morfológica das estirpes, estudos moleculares com amplificação de regiões satélite e estudos de identificação espetral por MALDI-TOF MS. Os estudos morfológicos permitiram a caraterização das estirpes pela

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Passarini, Michel Rodrigo Zambrano 1979. "Caracterização da diversidade de fungos filamentosos associados a esponjas marinhas e avaliação da produção de lacase = Diversity of filamentous fungi associated with marine sponges and evaluation of laccase production." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/316911.

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Orientador: Lara Durães Sette<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia<br>Made available in DSpace on 2018-08-21T06:41:16Z (GMT). No. of bitstreams: 1 Passarini_MichelRodrigoZambrano_D.pdf: 6997453 bytes, checksum: 0a905c32bd8d912eb875c88cff54de8e (MD5) Previous issue date: 2012<br>Resumo: O oceano representa um habitat promissor na busca por novos micro-organismos, os quais podem apresentar capacidade de produzir enzimas de interesse industrial diferentes das produzidas por seus parceiros terrestres. Neste contexto, duas amostras da esponja marinha Drag

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Souza, Danilo Tosta. "Exploração da diversidade bacteriana de esponjas marinhas por abordagens dependente e independente de cultivo." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/11/11138/tde-06012017-113512/.

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Este estudo descreve a diversidade e composição das comunidades bacterianas associadas a cinco esponjas marinhas, e o potencial destes microrganismos como produtores de substâncias bioativas com propriedades fungicidas. As esponjas vivem em simbiose com microrganismos que apresentam alto interesse ecológico, evolutivo e biotecnológico. Contudo, este sistema microbiano permanece pobremente entendido. Para totalmente compreender a biologia desses animais é necessário descrever os fatores ecológicos e evolutivos influenciando a estrutura e dinâmica de sua microbiota. Nesta tese é defendida a hipó

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Andreote, Ana Paula Dini. "Filosfera da Mata Atlântica: isolamento e sistemática de cianobactérias, bioprospecção e caracterização da comunidade diazotrófica." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/64/64133/tde-17042014-104142/.

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A filosfera da Mata Atlântica é um importante nicho de colonização por micro-organismos, cuja comunidade ainda é pouco conhecida. Algumas bactérias associadas à superfície das folhas possuem habilidade de fixar nitrogênio, mineralizar substratos orgânicos e também suprir as árvores com dióxido de carbono e fatores de crescimento. Este trabalho teve como objetivo gerar informações sobre a comunidade cianobacteriana que coloniza a filosfera de algumas plantas da Mata Atlântica e investigar a comunidade diazotrófica presente nesse habitat. Um total de 40 linhagens de cianobactérias da filosfera d

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Gouy, Augustin. "Simulation de réseaux karstiques discrets : application aux Calcaires du Barrois." Electronic Thesis or Diss., Université de Lorraine, 2025. http://www.theses.fr/2025LORR0028.

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Les systèmes karstiques, présents principalement dans les roches carbonatées comme le calcaire et la dolomie, se caractérisent par des réseaux de vides qui contrôlent les flux d'eau au sein des aquifères. Ces systèmes sont créés au travers de processus physico-chimiques complexes, et peuvent avoir des géométries et des topologies ainsi que des dimensions de conduits variées. Par ailleurs, les karsts se forment souvent souvent en plusieurs phases successives, complexifiant encore le phénomène.Ces systèmes posent des défis majeurs, tels que des risques quantitatifs sur la ressource en eau potabl

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LIBERATORE, STEPHANE. "Dynamique des ecoulements circumstellaires polyphases." Université Louis Pasteur (Strasbourg) (1971-2008), 2000. http://www.theses.fr/2000STR13037.

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L'objet de cette these est de determiner le role et l'influence des hypotheses relatives a la dynamique et au transfert de rayonnement dans la modelisation des vents et de la perte de masse des etoiles evoluees, lorsque la force radiative s'exercant sur les grains de poussiere joue un role majeur dans la structuration de l'enveloppe circumstellaire de l'etoile. Trois modeles autocoherents couplant la dynamique des grains et du gaz au transfert de rayonnement ont ete elabores pour trois approches differentes de la dynamique : le couplage en position (les grains sont geles dans le gaz, dans un m

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Chu, Yang. "Tectonique intracontinentale dans le bloc de Chine du sud : exemple de la chaîne du Xuefengshan." Phd thesis, Université d'Orléans, 2011. http://tel.archives-ouvertes.fr/tel-00626808.

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Les observations détaillés indiquent que la chaîne de Xuefengshan peut être divisé en deux parties, la zone Ouest, caractérisée par des plis-coffrés, et la zone Est à déformation ductile polyphasée. Elles sont séparées par le chevauchement principal vers l'Ouest. Dans la zone Est, les structures dominantes sont des plis à vergence NW associés à des schistosités pénétratives de plan axial et des linéations NW-SE. De l'ouest vers l'est, la schistosité montre un style en éventail. Les roches du socle affleurent seulement autour des plutons triasiques. Les roches de la chaîne de Xuefengshan sont g

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Bourkeb, Menad. "Capteur de courants innovant pour des systèmes polyphasés : application aux câbles multiconducteurs." Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10053/document.

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Cette thèse porte sur l'étude et la réalisation d’un prototype de capteur de courants innovant pour câbles multiconducteurs. Outre le caractère non-Intrusif de ce capteur (i.e. mesure sans contact), il permet de réaliser une mesure sur un système polyphasé dont la position des conducteurs est inconnue. L’approche adoptée est basée sur la résolution d’un problème inverse. En effet, à partir d’une mesure de la signature des champs magnétiques autour du câble, des algorithmes de reconstruction appropriés permettent de remonter aux courants circulant dans le câble. En plus des résultats de simulat

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Semail, Eric. "ENTRAINEMENTS ELECTRIQUES POLYPHASES :VERS UNE APPROCHE SYSTEME." Habilitation à diriger des recherches, Université des Sciences et Technologie de Lille - Lille I, 2009. http://tel.archives-ouvertes.fr/tel-00420019.

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Le transport de l'énergie électrique par des réseaux triphasés a conduit par le passé au développement de convertisseurs électromécaniques triphasés. Ces derniers ont bénéficié de l'essor des interrupteurs de puissance et de celui des composants de commande type Digital Signal Processor (DSP). Les performances de ces classiques machines électriques triphasées associées à des onduleurs s'en sont trouvées accrues notamment dans le domaine de la vitesse variable.<br />Néanmoins des problèmes apparaissent tant au niveau de l'onduleur que de la machine lorsqu'on désire augmenter la puissance transm

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Provencher, Claudine. "Cognitive polyphasia in the MMR controversy : a theoretical and empirical investigation." Thesis, London School of Economics and Political Science (University of London), 2007. http://etheses.lse.ac.uk/28/.

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This thesis examines the hypothesis of cognitive polyphasia proposed by Serge Moscovici in La Psychanalyse, son Image et son Public (1961/1976). Despite its intuitive appeal, the hypothesis remains largely unexplored. This research is an attempt at understanding better the operations of cognitive polyphasia, in particular, at the level of social individuals who have to make sense of the world around them. The hypothesis of cognitive polyphasia is empirically examined through the controversy that surrounded the MMR vaccination programme in the UK between 1998 and 2005. The review of literature

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Galigekere, Veda Prakash N. "SiC Schottky Diodes and Polyphase Buck Converters." Wright State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=wright1190064950.

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Chin, Nyun-Fook. "Polyphase directional detection for power system protection." Thesis, University of Bath, 1994. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260263.

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Nzikou, Jean-Mathurin. "Étude des phénomènes de diffusion des solutés ioniques par techniques voltamétrique et conductimétrique." Vandoeuvre-les-Nancy, INPL, 1995. http://www.theses.fr/1995INPL145N.

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Les phénomènes de transport constituent en eux seuls un vaste domaine d'étude qui se veut indispensable dans la compréhension des comportements des réacteurs électrochimiques et polyphasiques. Le but de ce travail a consisté à la mise en œuvre de deux différentes méthodes de détermination du coefficient de diffusion, qu'il a fallu ensuite confronter afin d'établir un quelconque lien entre elles ; nous avons de ce fait mis en œuvre la première méthode dite classique, largement utilisée en génie chimique. Elle décrit les phénomènes de manière très simple, mais demeure toutefois limitée car elle

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Sun, Jianhua. "Polyphase sequences with good correlation and low PAPR /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?ECED%202007%20SUN.

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Chen, Riqing. "Polyphase spreading sequence design for spread spectrum systems." Thesis, University of Oxford, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.509906.

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Feng, Daw. "Polyphase decomposition for sigma-delta A D converters." Thesis, University of Macau, 2018. http://umaclib3.umac.mo/record=b3952100.

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Vagnon, Eric. "Solutions innovantes pour le packaging de convertisseurs statiques polyphasés." Phd thesis, Grenoble INPG, 2010. http://www.theses.fr/2010INPG0029.

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L’électronique de puissance d’aujourd’hui s’inscrit dans un contexte environnemental où l’économie d’énergie est au centre des préoccupations. La traduction technologique d’une telle problématique sera, pour l’électronicien, la recherche de structures de conversion optimisant à la fois le rendement, la fiabilité et la qualité de l’énergie absorbée ou produite. Cet effort d’optimisation énergétique ne saurait être satisfaisant sans une recherche d’adaptation matérielle aux applications industrielles ou domestiques visées (avion tout électrique, éclairage…). C’est dans ce contexte que se situe c

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Vagnon, Eric. "Solutions innovantes pour le packaging de convertisseurs statiques polyphasés." Phd thesis, Grenoble INPG, 2010. http://tel.archives-ouvertes.fr/tel-00494431.

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L'électronique de puissance d'aujourd'hui s'inscrit dans un contexte environnemental où l'économie d'énergie est au centre des préoccupations. La traduction technologique d'une telle problématique sera, pour l'électronicien, la recherche de structures de conversion optimisant à la fois le rendement, la fiabilité et la qualité de l'énergie absorbée ou produite. Cet effort d'optimisation énergétique ne saurait être satisfaisant sans une recherche d'adaptation matérielle aux applications industrielles ou domestiques visées (avion tout électrique, éclairage...). C'est dans ce contexte que se situe

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Donatin, Emilie. "Détection des bactéries entéropathogènes : approche polyphasique." Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM5034/document.

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Le corps humain est un ensemble de microflores où cohabitent bactéries, archées, virus et eucaryotes. Ces écosystèmes complexes sont appelés microbiotes. Parmi ceux-ci figure le microbiote intestinal qui compte 1011 à 1014 bactéries/g de selle. Les modifications de la flore intestinale peuvent être à l'origine de pathologies comme les diarrhées infectieuses. Il s'agit d'un véritable problème de santé publique puisqu'environ 2.16 millions de décès sont liés à cette pathologie chaque année. Les virus intestinaux jouent un rôle prépondérant mais les infections bactériennes restent également impor

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Meddeb, Samir. "Sédimentation et tectonique polyphasée dans les dômes d'Enfida (Sahel tunisien)." Paris 11, 1986. http://www.theses.fr/1986PA112344.

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Une tectonique polyphasée caractérise les structures d’Enfida (Sahel tunisien). Au Crétacé-Paléocène des failles normales synsédimentaires, de différentes directions, guident la sédimentation. Des hauts fonds, essentiellement subméridiens prennent naissance. Un raccourcissement EW post Eocène, anté Oligocène, entraine la formation d'anticlinaux subméridien à l'emplacement des Jb Mdéker, Garsi et Fadeloun. Ces structures seront accentuées à la fin de l'Aquitanien par une nouvelle compression N075. La sédimentation de la formation Oum Douil (Langhien supérieur, Serravalien, Tortonien inférieur)

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Crévits, Yvan. "Caractérisation et commande des entraînements polyphasés en mode dégradé d’alimentation." Thesis, Lille 1, 2010. http://www.theses.fr/2010LIL10049/document.

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Le rétablissement d’un couple constant dans une machine polyphasée synchrone à aimants est décrit quand son alimentation statorique est dégradée par l’ouverture d’une ou plusieurs phases. Le chapitre un dresse un état de l’art des modélisations et des commandes des machines polyphasées dans un entraînement électromécanique, en mode normal et dégradé. Les outils de modélisation polyphasés du L2EP permettent une décomposition en machines fictives qui aboutit à une commande pour les deux modes de fonctionnement utilisant la Représentation Énergétique Macroscopique (REM). Il est enfin établi que c

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