Chlorpyrifos
Mostrando 1-12 de 46 artigos, teses e dissertações.
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1. DESENVOLVIMENTO DE METODOLOGIAS ANALÍTICAS PARA DETERMINAÇÃO DE CLORPIRIFÓS EM AMOSTRAS AQUOSAS EMPREGANDO A MICROEXTRAÇÃO LÍQUIDO-LÍQUIDO DISPERSIVA SEGUIDA POR HPLC-UV
The miniaturized extraction techniques use less aggressive methods to the environment, since they generate less waste and spend a minimum of organic solvents, besides having a good selectivity and specificity in the extractions. In this context, liquid-liquid dispersive microextraction (DLLME) has been highlighting. Thus, the present article describes an opt
Quím. Nova. Publicado em: 2020-01
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2. Comparative study on the biodegradation of chlorpyrifos-methyl by Bacillus megaterium CM-Z19 and Pseudomonas syringae CM-Z6
Abstract: The strains CM-Z19 and CM-Z6, which are capable of highly degrading chlorpyrifos-methyl, were isolated from soil. They were identified as Bacillus megaterium CM-Z19 and Pseudomonas syringae CM-Z6, respectively, based on the 16S rRNA and an analysis of their morphological, physiological and biochemical characteristics. The strain CM-Z19 showed 92.6%
An. Acad. Bras. Ciênc.. Publicado em: 14/10/2019
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3. Response of Wheat Plants to Combinations of Herbicides with Insecticides and Fungicides
RESUMO: A associação entre herbicidas e demais pesticidas pode causar reflexos tanto no manejo de plantas daninhas quanto de cultivadas. O objetivo deste trabalho foi avaliar a resposta da associação de diferentes herbicidas com inseticidas ou fungicidas pertencentes a diferentes grupos químicos sobre o desenvolvimento e rendimento de grãos de trigo, c
Planta daninha. Publicado em: 19/08/2019
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4. Impact of phosphate solubilizing bacteria on wheat (Triticum aestivum ) in the presence of pesticides
Resumo Três bactérias solubilizantes de fosfato foram isoladas e identificadas por seqüenciamento de rRNA 16S como Pseudomonas putida, Pseudomonas sp e Pseudomonas fulva. As estirpes foram submetidas a testes bioquímicos de plantas e todos os atributos PGPR foram verificados na presença de pesticidas (clorpirifos e piriproxifeno). O índice de solubili
Braz. J. Biol.. Publicado em: 2019-01
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5. Seletividade de Iodosulfuron-Methyl para Cultivares de Aveia
RESUMO As plantas daninhas estão entre os principais problemas para o alto rendimento de grãos em aveia hexaploide (Avena sativa), mas existem poucos herbicidas registrados para o controle de plantas daninhas nessa cultura de cereais. Os objetivos deste estudo foram avaliar o impacto do iodosulfuron-methyl no rendimento de grãos de cultivares de aveia eli
Planta daninha. Publicado em: 18/05/2017
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6. Soil bacteria showing a potential of chlorpyrifos degradation and plant growth enhancement
ABSTRACT Background: Since 1960s, the organophosphate pesticide chlorpyrifos has been widely used for the purpose of pest control. However, given its persistence and toxicity towards life forms, the elimination of chlorpyrifos from contaminated sites has become an urgent issue. For this process bioremediation is the method of choice. Results: Two bacterial
Braz. J. Microbiol.. Publicado em: 2016-09
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7. Tolerância do Feijoeiro ao Herbicida Ethoxysulfuron e o Mecanismo Envolvido no Processo
RESUMO Os objetivos deste trabalho foram determinar o efeito do herbicida ethoxysulfuron sobre o desenvolvimento do feijoeiro (Phaseolus vulgaris), avaliar o impacto do herbicida sobre o rendimento de grãos e determinar o mecanismo de tolerância do feijoeiro ao ethoxysulfuron. Em campo, foram realizados dois experimentos com doses crescentes de ethoxysulfu
Planta daninha. Publicado em: 2016-09
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8. Monitoring of Pesticide Residues in Surface and Subsurface Waters, Sediments, and Fish in Center-Pivot Irrigation Areas
In this study, the monitoring of pesticide residues, which show potential for environmental contamination, in center-pivot irrigated areas in the Brazilian cerrado, was performed. The pesticides monitored were acephate, atrazine, azoxystrobin, buprofezin, carbofuran, cyproconazole, chlorpyrifos, difenoconazole, diuron, imidacloprid, malathion, methamidophos,
J. Braz. Chem. Soc.. Publicado em: 2015-11
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9. Evaluation of the Effects of Hofmeister Series on Salting Out in the Determination of Organophosphorous Pesticides and Pyrethroids by LDS/DLLME
Various greener microextraction procedures have been proposed with low limits of detection to control of pesticides present in the environment, including the low-density solvent dispersive liquid‑liquid microextraction (LDS/DLLME) technique. The addition of electrolytes is important in order to induce the salting-out effect. Thus, it is possible to use the
J. Braz. Chem. Soc.. Publicado em: 2015-09
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10. PESTICIDE RESIDUES IN CONVENTIONALLY AND ORGANICALLY GROWN TOMATOES IN ESPÍRITO SANTO (BRAZIL)
The aim of this study was to investigate the presence of acephate, carbaryl, carbendazim, chlorpyrifos, dichlorvos, fenpropathrin, methamidophos and permethrin in conventionally and organically grown tomatoes from Espírito Santo, Brazil, between May 2012 and April 2013. QuEChERS sample preparation was used and analysis was performed by LC-MS/MS and GC-MS
Quím. Nova. Publicado em: 2015-07
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11. Flow Injection Analysis System for Screening Organophosphorus Pesticides by their Inhibitory Effect on the Enzyme Acethylcholinesterase
A flow-injection spectrophotometric procedure was developed for screening organophosphorus pesticides. The method is based on the inhibition of acetylcholinesterase immobilized on controlled porous glass beads with acetylcholine chloride as the substrate. Methyl parathion, chlorpyrifos, malathion and dichlorvos have been tested. The analytical peak height fo
J. Braz. Chem. Soc.. Publicado em: 2015-03
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12. Efeitos de uma formulação pulverização sobre os parâmetros reproductivos de uma população susceptível de Rhipicephalus (Boophilus) microplus
É relativamente pequeno o número de estudos que enfatiza os danos que uma formulação acaricida spray pode desencadear sobre os parâmetros reprodutivos das teleóginas. O presente estudo teve como objetivo avaliar os efeitos deletérios de uma formulação spray comercial (dichlorvos 60% + Clorpirifós 20%), sobre os parâmetros reprodutivos de uma popul
Rev. Bras. Parasitol. Vet.. Publicado em: 2014-12