Organophosphorus Compounds
Mostrando 13-24 de 27 artigos, teses e dissertações.
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13. Ocorrência de resíduos de dimetoato e aldicarb em ovos produzidos na região norte do estado do Paraná
A avicultura de postura utiliza os inseticidas como agente terapêutico, profilático e no controle de moscas. Após exposição das aves aos praguicidas e medicamentos, via alimentação, água, controle de moscas e ectoparasitas, pode resultar na presença de resíduos em ovos ou produtos derivados, que podem acarretar prejuízos à saúde dos consumidores
Publicado em: 2007
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14. Isolation and characterization of esterase gene related with OP insecticide resistance in Cochiliomya Hominivorax (Diptera: Calliphoridae) / Isolamento e caracterização do gene da esterase relacionado a resistencia a inseticidas organofosforados na mosca praga da pecuaria Cochliomyia hominivorax (Diptera: Calliphoridae)
A pecuária bovina tem significativa importância no contexto sócio-econômico para o país, sendo responsável pela produção anual de mais de 2 milhões de toneladas de carne, uma das principais fontes de proteína animal da dieta do consumidor brasileiro. A alta produtividade deve estar sempre acompanhada de um controle sanitário eficiente desses anima
Publicado em: 2007
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15. Análise de praguicidas organofosforados em água por extração em fase sólida (SPE) utilizando discos C18 e cromatografia em fase gasosa: avaliação da contaminação do reservatório de Furnas (MG-Brasil)
Solid phase extraction (SPE) in C18 disks has been optimized and validated for extraction of 5 organophosphorus (OP) pesticides in water. Extraction has been followed by separation and detection by gas chromatography/flame photometry. Excellent linearity was obtained for all compounds (r greater than 0.99), with CVs between 1.0-6.9%, recoveries between 73-95
Química Nova. Publicado em: 2005-10
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16. Resistance to pyrethroids and organophosphorus acaricides in cattle tick Boophilus microplus (Acari Ixodidae) / Resistencia do carrapato Boophilus microplus (Acari: Ixodidae) aos piretroides e organofosforados e o tratamento carrapaticida em pequenas fazendas
The cattle tick - Boophilus microplus (Acari: Ixodidae) ? is one of the principal causes of economic losses in the cattle farms in São Paulo state. The current situation of the tick control is characterized by a crisis in the production of new molecules with acaricidal properties and by an increasing in the parasites resistance to the products used to contr
Publicado em: 2005
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17. Neuropathy after organophosphorus compounds poisoning.
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18. Purification and properties of an organophosphorus acid anhydrase from a halophilic bacterial isolate.
A moderately halophilic bacterial isolate has been found to possess high levels of enzymatic activity against several highly toxic organophosphorus compounds. The predominant enzyme, designated organophosphorus acid anhydrase 2, has been purified 1,000-fold to homogeneity and characterized. The enzyme is a single polypeptide with a molecular weight of 60,000
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19. Organophosphorus Poisons. Anticholinesterases and Related Compounds
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20. Neuromuscular function in pesticide workers
Jager, K. W., Roberts, D. V., and Wilson, Andrew (1970).Brit. J. industr. Med.,27, 273-278. Neuromuscular function in pesticide workers. Electromyography (EMG) provides a sensitive, objective, and speedy method of detecting impairment of nerve and muscle function in pesticide workers who are apparently in good health. Exposure to two organophosphorus compoun
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21. Phosphorus-containing pesticide breakdown products: quantitative utilization as phosphorus sources by bacteria.
Bacteria were isolated that could utilize representatives of the following ionic phosphorus-containing breakdown products of organophosphorus pesticides as sole phosphorus sources: dialkyl phosphates, dialkyl phosphorothioates, dialkyl phosphorodithioates, alkyl arylphosphonates, alkyl arylphosphonothioates, and alkyl alkylphosphonates. Utilization of each o
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22. VALUE OF ED50 TESTING IN ASSESSING HAZARDS OF ACUTE POISONING BY CARBAMATES AND ORGANOPHOSPHATES
It is shown from the kinetics of inhibition of cholinesterase by N-methylcarbamates and organophosphates that the LD50 dose is likely to be a much greater multiple of the dose causing signs of poisoning in 50% of the animals (the ED50) for the carbamates than for the organophosphates. The expected difference was demonstrated by a comparison of the LD50s and
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23. Plasma concentrations of the oxime Pralidoxime Mesylate (P2S) after repeated oral and intramuscular administration.
The use of the oxime P2S as intravenous therapy for organophosphorus anticholinesterase poisoning is well known. In emergency situations this route of administration may prove impractical due to severe symptoms of anticholinesterase poisoning and therefore the intramuscular route is to be preferred. The absolute intramuscular dose of P2S per man, recommended
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24. Altering the Substrate Specificity of Organophosphorus Hydrolase for Enhanced Hydrolysis of Chlorpyrifos
Chlorpyrifos is one of the most popular pesticides used for agriculture crop protection, and widespread contamination is a potential concern. However, chlorpyrifos is hydrolyzed almost 1,000-fold slower than the preferred substrate, paraoxon, by organophosphorus hydrolase (OPH), an enzyme that can degrade a broad range of organophosphate pesticides. We have
American Society for Microbiology.