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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
151

Genetic Structure and Function Analysis of the Conserved Integral Membrane Components (FliOPQR) of the Flagellar Type III Secretion Apparatus of Salmonella enterica

Erhardt, Marc. January 2006 (has links)
Konstanz, Univ., Diplomarbeit, 2006.
152

Comparison of the efficiency of two bio-pasteurization systems to eliminate escherichia coli 0157:H7 and salmonella enterica subsp. enterica serovar typhimurium in manure /

Sheibani, Sara. January 2007 (has links) (PDF)
Thèse (M.A.)--Université Laval, 2007. / Bibliogr.: f. [59]-72. Publié aussi en version électronique dans la Collection Mémoires et thèses électroniques.
153

Phage-coupled piezoelectric biodetector for Salmonella typhimurium

Olsen, Eric Vincent, Petrenko, Valery. Barbaree, James M. January 2005 (has links) (PDF)
Dissertation (Ph.D.)--Auburn University, 2005. / Abstract. Vita. Includes bibliographic references.
154

The fate of Escherichia coli O157:H7 and Salmonella enterica Typhimurium in food vacuoles and expelled pellets of a Tetrahymena species a thesis presented to the faculty of the Graduate School, Tennessee Technological University /

Pannell, Charles T., January 2009 (has links)
Thesis (M.S.)--Tennessee Technological University, 2009. / Title from title page screen (viewed on Aug. 26, 2009). Bibliography: leaves 40-45.
155

Experimental evolution and molecular basis of host-specific viral adaptation /

Crill, Wayne Douglass, January 1998 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 1998. / Vita. Includes bibliographical references (leaves 76-81). Available also in a digital version from Dissertation Abstracts.
156

The Construction of several nitroreductase and O-acetyltransferase overproducing S. ; Typhimurium tester strains and their application in the Salmonella mutagenicity assay (Ames test).

Carroll, Craig E., January 2000 (has links)
Thesis (M. Sc.)--Carleton University, 2000. / Also available in electronic format on the Internet.
157

Funktionale Genomanalyse bei Salmonella-enterica-Serovar-Typhimurium Einfluss neuartiger Gene und Genominseln auf die intrazelluläre Replikationsfähigkeit /

Klumpp, Jochen. Unknown Date (has links)
Techn. Universiẗat, Diss., 2006--München.
158

Interaction of Salmonella typhimurium and Listeria monocytogenes with the murine host

Daniels, Justin John Douglas. January 1999 (has links)
Würzburg, Univ., Diss., 1999. / Dateiformat: zip, Dateien in unterschiedlichen Formaten
159

Separação imunomagnética associada a bacteriófago para diagnóstico de Salmonella enterica em carne de frango / Immunomagnectic Separation Assay associated with Bacteriophage for Salmonella enterica diagnosis in poultry meat

Corrêa, Isadora Mainieri de Oliveira [UNESP] 27 August 2015 (has links) (PDF)
Made available in DSpace on 2016-05-17T16:51:28Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-08-27. Added 1 bitstream(s) on 2016-05-17T16:55:04Z : No. of bitstreams: 1 000858305.pdf: 630893 bytes, checksum: e53c41b93a6a9b4cede596f30d685272 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / Utilizou-se o método de Separação Imunomagnética associada a Bacteriófago para detectar os seguintes sorovares: Salmonella Heidelberg, Salmonella Enteritidis e Salmonella Typhimurium, em amostras de sobrecoxas de frango contaminadas artificialmente. Para certificarmo-nos da eficiência do método, comparamos esta técnica com os testes de diagnóstico usuais para este patógeno: a análise bacteriológica padrão, que inclui a etapa de pré-enriquecimento, enriquecimento seletivo, realização de testes bioquímicos de triagem e sorologia, e a reação em cadeia da polimerase (PCR). Na avaliação da capacidade dos testes na detecção de Salmonella em carne de frango, submetemos amostras de sobrecoxas de frango à contaminação artificial com 5, 10 e 100 UFC/25mL de bactéria, para cada um dos sorovares listados anteriormente, totalizando 270 análises, divididas em 90 testes para cada um dos três sorovares, e assim comparamos os resultados obtidos com a análise bacteriológica, PCR e o teste de Separação Imunomagnética associada a Bacteriófago. Ao aferirmos os resultados constatamos que a Separação Imunomagnética associada a Bacteriófago é equiparável ao método bacteriológico recomendado pelo Ministério da Agricultura, Pecuária e Abastecimento (MAPA) e com a técnica de PCR, pois 99,6% das amostras foram positivas ao realizarmos o teste de Separação Imunomagnética associado a Bacteriófago e apenas uma amostra de Salmonella Enteritidis foi negativa neste ensaio, na concentração de 5 UFC/25mL. Já no método bacteriológico verificamos 95,5% de positividade, com nove amostras negativas para S. Heidelberg, duas negativas para S. Enteritidis e duas no ensaio com S. Typhimurium. Na técnica de PCR obtivemos 98,5% de positivos, com uma amostra negativa para S. Enteritidis na concentração de 5 UFC/25mL e três negativas para S. Typhimurium. O tempo despendido para a realização de cada teste foi aferido e constatamos... / We used the Immunomagnectic Separarion Assay associated with Bacteriophage to detect the following serovars: Salmonella Enteritidis, Salmonella Heidelberg and Salmonella Typhimurium, in poultry drumstick samples artificially contaminated. We compared the efficiency of this technique to the usual diagnostic tests for Salmonella in food samples: the standard bacteriological analysis, which includes the step of pre-enrichment and selective enrichment, biochemical and serological screening tests, and polymerase chain reaction (PCR). To evaluate the tests capability of Salmonella detection poultry meat samples were submitted to artificial contamination with 5, 10 and 100 CFU/25mL of bacteria, for each of the serovars listed above, totaling 270 analyzes divided into 90 tests for each of the three serovars, and so compare the results obtained with the bacteriological analysis, PCR and Immunomagnetic Separation Bacteriophage assay. We found that the Immunomagnetic Separation Bacteriophage assay was comparable to bacteriological method recommended by the Ministry of Agriculture, Livestock and Supply (MAPA) and the PCR technique, because 99.6% of the samples were positive to accomplish Immunomagnetic Separation Bacteriophage assay and only a sample of Salmonella Enteritidis was negative in this test, in the concentration of 5 CFU/25mL. The bacteriological method check 95.5% positivity, with nine samples negative for S. Heidelberg, two negative for S. Enteritidis and two in the test with S. Typhimurium. In PCR 98.5% positives samples were obtained, with one S. Enteritidis negative sample in the concentration of 5 CFU/25ml and three negative samples for S. Typhimurium. The time for performing each test was measured and the Immunomagnetic Separation Bacteriophage assay was the most rapid test for Salmonella diagnosis, since 20 hours, the conventional bacteriological took 88h and PCR 44h approximately. In this study we confirm the effectiveness of the ... / FAPESP: 2013/04365-3
160

Estudo do potencial antimutagênico, mutagênico, estrogênico e antibacteriano de flavonoides

Resende, Flávia Aparecida [UNESP] 28 November 2011 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:32:56Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-11-28Bitstream added on 2014-06-13T20:44:23Z : No. of bitstreams: 1 resende_fa_dr_arafcf.pdf: 1608524 bytes, checksum: b43a0ccb7787273f1e72021fb36546bf (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Universidade Estadual Paulista (UNESP) / Os flavonoides exibem uma multiplicidade de atividades biológicas tanto in vivo como in vitro. No entanto, não existem dados suficientes para fornecer provas conclusivas sobre os efeitos benéficos da maioria das subclasses de flavonoides. Dessa maneira, neste estudo tornou-se relevante avaliar a mutagenicidade, antimutagenicidade, estrogenicidade e atividade antibacteriana dos flavonoides, com o objetivo de traçar o perfil relação estrutura-atividade, uma vez que a atividade biológica dos flavonoides depende da sua estrutura química. A mutagenicidade e antimutagenicidade foram avaliadas pelo teste de Ames, em cepas de Salmonella typhimurium TA98, TA100 e TA102, com e sem ativação metabólica. Para comparação do efeito protetor dos flavonoides foram utilizados 4-nitro-o-fenilenodiamina (NPD), azida sódica (AZS) e mitomicina C (MMC) como mutágenos de ação direta e benzo[a]pireno (B[a]P), aflatoxina B1 (AFB1) e 2-aminoantraceno (2-AA) como mutágenos de ação indireta. A atividade estrogênica foi avaliada por meio do ensaio com leveduras recombinantes (RYA - Recombinant Yeast Assay) e pelo ensaio de proliferação de células de câncer de mama humano (MCF-7⁄BUS) responsivas à estrógeno (E-screen). A determinação da atividade antibacteriana in vitro foi realizada neste estudo utilizando a técnica de diluição em microplacas, com as bactérias Staphylococcus aureus ATTC 25923 e Escherichia coli ATCC 25922. Os compostos avaliados foram: quercetina, kaempferol, luteolina, fisetina, crisina, galanina, flavona, 3-hidroxiflavona, 5- hidroxiflavona e 7-hidroxiflavona. No teste de Ames, a quercetina mostrou-se diretamente mutagênica na linhagem TA98 e antimutagênica... / The flavonoids exhibit a wide range of biological activities both in vivo and in vitro. However, there are insufficient data to provide conclusive evidence on the health effects of most flavonoid subclasses. Thus, is relevant to assess the mutagenicity, antimutagenicity, estrogenicity and antibacterial activity of flavonoids with the aim of tracing the structure-mutagenicity relationship profile, since the biological activity of flavonoids is governed by their chemical structure. The mutagenicity and antimutagenicity was assayed by the Ames test, with Salmonella typhimurium strains TA98, TA100 and TA102, carried out with and without metabolic activation. To compare the protective effect of flavonoids were used 4-nitro-o-phenylenediamine (NPD), sodium azide (AZS) and mitomycin C (MMC) as direct acting mutagens and benzo[a]pyrene (B[a]P), aflatoxin B1 (AFB1) e 2-aminoanthracene (2-AA) as indirect acting mutagens. The estrogenic activity was assayed by recombinant yeast assay (RYA) and by proliferation assay of cells of human breast cancer (MCF-7⁄ BUS) responsive to estrogen (E-screen). The determination of antibacterial activity in vitro was performed in this study by technique of dilution in microplates, with the bacteria Staphylococcus aureus ATTC 25923 and Escherichia coli ATCC 25922. The evaluated compounds were: quercetin, kaempferol, luteolin, fisetin, chrysin, galangin, flavones, 3-hydroxyflavone, 5- hydroxyflavone and 7- hydroxyflavone. In the Ames test, quercetin was directly mutagenic... (Complete abstract click electronic access below)

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