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salmonella infections/nicotina
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Pagina 1 a partire dal 241 risultati
Predicting the mutagenicity of tobacco-related N-nitrosamines in humans using 11 strains of Salmonella typhimurium YG7108, each coexpressing a form of human cytochrome P450 along with NADPH-cytochrome P450 reductase.
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Tobacco, including snuff and chewing tobacco, contains N-nitrosamines such as 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK), N-nitrosodiethylamine (NDEA), N-nitrosopyrrolidine (NPYR), N-nitrosopiperidine (NPIP), N-nitrosomorpholine (NMOR), N-nitrosonornicotine (NNN), N-nitrosoanabasine
Identification, occurrence and mutagenicity in Salmonella typhimurium of two synthetic nitroarenes, musk ambrette and musk xylene, in Indian chewing tobacco and betel quid.
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During N-nitrosamine analysis of extracts of betel quid with tobacco and of the saliva of chewers of betel quid with tobacco for N-nitrosamines using a Thermal Energy Analyzer, two unknown compounds were detected. They were identified as synthetic nitro musks, musk ambrette
Mutagenicity of coal-dust and smokeless-tobacco extracts in Salmonella typhimurium strains with differing levels of O-acetyltransferase activities.
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Epidemiological studies have indicated an increased incidence of gastric neoplasia in coal miners. Because smokeless tobacco use is prevalent in the mining industry, nitrites or other components of these products may be etiologically associated with these gastric neoplasms. In this study both
Metabolic activation of m-phenylenediamine to products mutagenic in Salmonella typhimurium by medium isolated from tobacco suspension cell cultures.
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Both tobacco cells in suspension and the medium recovered from the suspension cultures (TX1MX) activated the aromatic amine m-phenylenediamine (m-PDA) into a product that was mutagenic in Salmonella typhimurium TA98 and YG1024. Medium recovered from stationary-phase tobacco cell cultures exhibited
Mutation spectrum in Salmonella induced by environmental tobacco smoke.
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Environmental tobacco smoke (ETS) is a major source of indoor air pollution. Extractable-respirable particulate (ERP) from the ETS-contaminated indoor air (ERP-ETS) was collected from six passenger train cars and one control room. The mutagenicity of ERP-ETS was tested in the Ames/Salmonella test in
Effects of different inducers of cytochrome P450 on the mutagenesis of the tobacco-specific nitrosamine 4-(methylnitrosamino)- 1-(3-pyridyl)-1-butanone (NNK) in Salmonella typhimurium TA1535.
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The effects of six inducers of isoenzymes of cytochrome P450 on the mutagenicity of the tobacco-specific nitrosamine 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) in Salmonella typhimurium strain TA1535 by hamster liver S9 and microsomes were investigated. Comparisons of the effects of
Mutagenicity of automobile workshop soil leachate and tobacco industry wastewater using the Ames Salmonella fluctuation and the SOS chromotests.
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Environmental management of industrial solid wastes and wastewater is an important economic and environmental health problem globally. This study evaluated the mutagenic potential of automobile workshop soil-simulated leachate and tobacco wastewater using the SOS chromotest on Escherichia coli PQ37
Mutagenicity in the Salmonella/microsome assay of tobacco condensates formed during pipe smoking.
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The condensates collected after pipe smoking of a natural tobacco and a cavendish type tobacco, either unwrapped or wrapped in a paper "saver" bag, were tested for mutagenicity in the Salmonella/mammalian microsome assay with strains TA100 and TA98. The number of revertants induced with cavendish
Mutagenicity of marijuana and Transkei tobacco smoke condensates in the Salmonella/microsome assay.
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Extracts and smoke condensates of marijuana, Transkei home-grown tobacco and also commercial cigarette tobaccos were assayed for their mutagenic activity to Salmonella typhimurium strains TA98, TA100, TA1535, TA1537 and TA1538, both with and without metabolic activation. No mutagenic activity was
Reduction in Ames Salmonella mutagenicity of mainstream cigarette smoke condensate by tobacco protein removal.
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The mutagenic activity of cigarette smoke condensates (CSC) made from tobacco before and after removal of protein was assessed by the Ames Salmonella assay in bacterial strains TA98 and TA100. Removal of protein and peptides from flue-cured tobacco via water extraction followed by protease digestion
SseF, a type III effector protein from the mammalian pathogen Salmonella enterica, requires resistance-gene-mediated signalling to activate cell death in the model plant Nicotiana benthamiana.
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Type III effector proteins (T3Es) of many Gram-negative pathogenic bacteria manipulate highly conserved cellular processes, indicating conservation in virulence mechanisms during the infection of hosts of divergent evolutionary origin. In order to identify conserved effector functions, we used a
Genetic toxicity of methyl methanethiosulfonate on Salmonella typhimurium, Saccharomyces cerevisiae and Nicotiana tabacum.
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The genetic toxicity of methyl methanethiosulfonate (MMT), a hydrolytic derivative of the insecticide methomyl, or lannate (Du Pont), was studied in Salmonella typhimurium, Saccharomyces cerevisiae and Nicotiana tabacum. At low concentrations, a lethal action was observed in all 3 models. Nuclear
Transgenic tobacco plants expressing a dimeric single-chain variable fragment (scfv) antibody against Salmonella enterica serotype Paratyphi B.
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Transgenic tobacco plants were produced that express an anti-Salmonella enterica single-chain variable fragment (scFv) antibody that binds to the lipopolysaccharide (LPS) of S. enterica Paratyphi B. The coding sequence of this scFv was optimized for expression in tobacco, synthesized and
Active suppression of early immune response in tobacco by the human pathogen Salmonella Typhimurium.
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The persistence of enteric pathogens on plants has been studied extensively, mainly due to the potential hazard of human pathogens such as Salmonella enterica being able to invade and survive in/on plants. Factors involved in the interactions between enteric bacteria and plants have been identified
[Comparison of idiotypes of rabbit antibodies against Salmonella abortusequi and tobacco mosaic virus. Study of cross reactions between antibody idiotypes against these 2 antigenic materials].
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