Carbamates
Mostrando 13-24 de 42 artigos, teses e dissertações.
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13. Tebuthiuron with carbofuran in the culture of sugar cane / Tebuthiuron com Carbofuran na cultura da cana-de-açúcar
The sugarcane is one of most important cultures in Brazil, and is very important social and economically. The simultaneous use of nematicides with herbicides in sugarcane are growing every season, due to the positive along with productivities with the aim of these products. That coned responses in be explained due to high infestation of ectoparasitic nematod
Publicado em: 2008
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14. Contamination analisys of São Lourenço river water (Nova Friburgo/RJ) by organophosphorade a carbamate pesticides / Análise da contaminação das águas do córrego São Lourenço (Nova Friburgo, RJ) por agrotóxicos organofosforados e carbamatos
O córrego de São Lourenço (Nova Friburgo RJ), situado na principal região agrícola do estado, representa um importante manancial hídrico do município de Nova Friburgo que percorre um vale onde se concentram as principais lavouras responsáveis pela produção de olerícolas do Estado. Esta localidade apresenta expressiva relação de consumo de agrot�
Publicado em: 2008
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15. Intoxicação por aldicarb ("chumbinho"): I. Estudo das alterações post mortem microscópicas em cães e gatos - II. Avaliação dos efeitos tóxicos agudos em camundongos / Aldicarb poisoning: I - Study of microscopic post mortem findings in dogs and cats. II - Acute toxicity evaluation in mice
O presente trabalho propôs estudar as alterações microscópicas observadas em 100 casos de intoxicação por aldicarb em cães e gatos e os efeitos agudos (14 dias) induzidos por esse praguicida em camundongos após a administração de dose única oral, avaliando-se as alterações clínicas, laboratoriais, microscópicas e ultraestruturais. As principai
Publicado em: 2008
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16. Avaliação do impacto da agricultura em áreas de proteção ambiental, pertencentes à bacia hidrográfica do rio ribeira de iguape, São Paulo
In order to ascertain the impact of agricultural activities on water quality of the Ribeira de Iguape River Basin in the state of São Paulo, surface water areas for catchment and drinking water have been characterized. The sampling period covered March/2002 - February/2003 and January/2004 at 10 different catchment points. SPE-LC-UV/Vis was used to monitor
Química Nova. Publicado em: 2007-10
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17. SÍNTESE E ATIVIDADE BIOLÓGICA DE FURAN-3-CARBOXAMIDAS, 3-AMINOMETILENODIIDROFURAN-2-ONAS E CARBAMATOS DE ETILA TRIALOMETILADOS / SYNTHESIS AND BIOLOGICAL ACTIVITY OF FURAN-3-CARBOXAMIDES, 3-AMINOMETHYLENEDIHYDRO-FURAN-2-ONES AND TRIHALOMETHYLATED ETHYL CARBAMATES
Este trabalho apresenta a síntese de furan-3-carboxamidas e 3-aminometilenodiidrofuran-2-onas, duas séries de compostos obtidos com bons rendimentos (63-98%) e inéditos na literatura. A síntese das furan-3-carboxamidas, iniciou com a aromatização de 3-tricloroacetil-4,5-diidrofurano a 3-tricloroacetil furano seguido por substituição do grupo tricloro
Publicado em: 2007
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18. "Desenvolvimento e aplicações de eletrodos modificados com a enzima acetilcolinesterase para a detecção de pesticidas em matrizes de alimentos" / Development and application of acetylcholinesterase enzyme modified electrodes for pesticides determination in food matrices
This work describes the development, characterization and utilization of a carbon paste biosensor based in the acetylcholinesterase enzyme for carbamates determinations in foodstuff, as well as the study of rate constants for enzyme/substrate reaction in solution. Stability tests were initially performed for both the substrate and the enzyme. In these tests,
Publicado em: 2007
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19. Síntese e estudo das interações de 3-(fosfato)- e 3-(fosfonamida)-4,4,4-trifluor-but-1-il-carbamatos de etila com a enzima acetilcolinesterase e síntese de 3-carboxietil- e 3-pirimidin-2-il-2-oxo-6-trifluormetil-[1,2,3]oxatiazinanas / Synthesis and interactions studies of 3-phosphate- and 3-phosphonamide-4,4,4-trifluoro-but-1-yl-carbamic acid ethyl esters with acetylcholinesterase enzyme and synthesis of 3-carboxyethyl- and 3-pyrimidin-2-yl-2-oxo-6-trifluoromethyl-[1,2,3]oxathiazinanes
A series of [3-(phosphate)-4,4,4-trifluoro-but-1-yl]-carbamic acid ethyl ester and [3-(phosphonamide)-4,4,4-trifluoro-but-1-yl]-carbamic acid ethyl ester obtained from the reaction of g-amino alcohols (4,4,4-trifluoro-3-hydroxy-butan-1-yl)-carbamic acid ethyl ester with phosphorus oxychloride in the presence of base and subsequent reaction with alcohols or a
Publicado em: 2007
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20. Reação de alfa -amidoalquilação de ions N-aciliminio com nucleofilos de carbono em sistema micelar SDS/agua, na ausencia de solvente e em liquido ionico : aplicação na sintese de um analogo da febrifugina / alfa -amidoalkylation of N-acyliminium ions with carbon nucleophiles in SDS/water, under solvent-free condition and in ionic liquid. Aplication to the synthesis of a febrifugine analog
Our work involved the formation of N-acyliminium ions, generated under the following reaction conditions: SDS/water micelles, solvent-free and in ionic liquido N-acyliminium ions were generated from the corresponding carbamates (N-Boc-2-methoxypyrrolidine and N-Boc-2-methoxypiperidine) with the aid of a Lewis or Bronsted acid catalyst. Both aqueous HCI and I
Publicado em: 2006
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21. Análise de pesticidas, aflatoxinas e análise de macro e microminerais de polpa cítrica peletizada comercial
Pesticides, aflatoxins, and nutritional analyses of commercial citrus pulp pellets in Brazil were performed in samples from São Paulo State. They were stored during 86 days and were processed for detection of toxic agents. Residual pesticides (organochlorinated, organophosphorus, pyrethoids, carbamates, chloroalquil tio fungicides, triazols, and the miscell
Arquivo Brasileiro de Medicina Veterinária e Zootecnia. Publicado em: 2004-10
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22. Fatal aldicarb intoxication in dogs and cats: study of post mortem macroscopic alterations and toxicological diagnosis using thin-layer chromatography in samples of stomach content / Intoxicação por aldicarb ("chumbinho") em cães e gatos: estudo das alterações post mortem macroscópicas e diagnóstico toxicológico por meio da cromatografia em camada delgada em amostras de conteúdo estomacal
Pesticides are the main cause of poisoning in human beings and in wild and domestic animals. Preliminary data suggest that the carbamate insecticide aldicarb, illegally sold in São Paulo city as rat poison, has also been used for intentional poisoning of dogs and cats. The Service of Necropsy, Department of Pathology of School of Veterinary Medicine, Univer
Publicado em: 2004
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23. Extração por fluido supercrítico de alguns inseticidas carbamatos em amostras de batata, com determinação por HPLC/fluorescência e confirmação por HPLC/espectrometria de massas
Six supercritical fluid extraction (SFE) methods were tested, by varying the following operational parameters: CO2 pressure, time and temperature of extraction, type and proportion of static modifier, and Hydromatrix®/sample rate into cell. Firstly, insecticide carbamates were extracted from spiked potatoes samples (fortification level of 0,5 mg.Kg-1) by us
Química Nova. Publicado em: 2002-05
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24. Linha básica de suscetibilidade de Spodoptera frugiperda (Lepidoptera: Noctuidae) a Lufenuron na cultura do milho. / Baseline susceptibility of Spodoptera frugiperda (Lepidoptera: Noctuidae) to Lufenuron in corn.
Lufenuron is a newly benzoylphenyl urea chitin synthesis inhibitor insecticide. The use of this compound to control Spodoptera frugiperda J. E. Smith (Lepidoptera: Noctuidae) has increased significantly in the past years. This increase can be attributed to its high activity against S. frugiperda and to the reduction of efficacy due to resistance to some trad
Publicado em: 2002