The Experts below are selected from a list of 96 Experts worldwide ranked by ideXlab platform
Armand B Pepperman - One of the best experts on this subject based on the ideXlab platform.
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release of fenamiphos atrazine and alachlor into flowing water from granules and spray deposits of conventional and controlled release formulations
Journal of Agricultural and Food Chemistry, 1996Co-Authors: Richard F Davis, Don R Wauchope, Alva W Johnson, Benali Burgoa, Armand B PeppermanAbstract:The release into water of active ingredients from spray deposits or granules of fenamiphos, atrazine, and alachlor was measured for commercial and experimental controlled-release formulations. Granules or spray mixtures of the pesticides were mixed with coarse sand and dried if necessary, and the mixture was placed in 5 mm × 35 mm stainless steel cylinders through which distilled water was then pumped for 24 h. Pesticide concentrations in the eluate were determined by HPLC analysis. The conventional formulations (Emulsifiable Concentrates, granulars, and dispersible granules) gave total release in 5−24 h and in some cases appeared to release particles into contacting water. Controlled-release starch-encapsulated formulations gave between 5% and 94% release in 24 h. Clay/alginate and clay/alginate/linseed oil formulations gave 0.3−100% release in 24 h, depending mainly on the aqueous solubility and lipophilicity of the pesticide. This simple technique provides comparative insights into the amounts and rate...
Chen Gong - One of the best experts on this subject based on the ideXlab platform.
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Monitoring of the Pesticide Droplet Deposition with a Novel Capacitance Sensor.
Sensors, 2019Co-Authors: Pei Wang, Mingxiong Ou, Chen GongAbstract:Rapid detection of spraying deposit can contribute to the precision application of plant protection products. In this study, a novel capacitor sensor system was implemented for measuring the spray deposit immediately after herbicide application. Herbicides with different formulations and nozzles in different mode types were included to test the impact on the capacitance of this system. The results showed that there was a linear relationship between the deposit mass and the digital voltage signals of the capacitance on the sensor surface with spray droplets. The linear models were similar for water and the spray mixtures with non-ionized herbicides usually in formulations of Emulsifiable Concentrates and suspension Concentrates. However, the ionized herbicides in formulation of aqueous solutions presented a unique linear model. With this novel sensor, it is possible to monitor the deposit mass in real-time shortly after the pesticide application. This will contribute to the precision application of plant protection chemicals in the fields.
Richard F Davis - One of the best experts on this subject based on the ideXlab platform.
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release of fenamiphos atrazine and alachlor into flowing water from granules and spray deposits of conventional and controlled release formulations
Journal of Agricultural and Food Chemistry, 1996Co-Authors: Richard F Davis, Don R Wauchope, Alva W Johnson, Benali Burgoa, Armand B PeppermanAbstract:The release into water of active ingredients from spray deposits or granules of fenamiphos, atrazine, and alachlor was measured for commercial and experimental controlled-release formulations. Granules or spray mixtures of the pesticides were mixed with coarse sand and dried if necessary, and the mixture was placed in 5 mm × 35 mm stainless steel cylinders through which distilled water was then pumped for 24 h. Pesticide concentrations in the eluate were determined by HPLC analysis. The conventional formulations (Emulsifiable Concentrates, granulars, and dispersible granules) gave total release in 5−24 h and in some cases appeared to release particles into contacting water. Controlled-release starch-encapsulated formulations gave between 5% and 94% release in 24 h. Clay/alginate and clay/alginate/linseed oil formulations gave 0.3−100% release in 24 h, depending mainly on the aqueous solubility and lipophilicity of the pesticide. This simple technique provides comparative insights into the amounts and rate...
Lajmanovich, Rafael Carlos - One of the best experts on this subject based on the ideXlab platform.
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Comparative toxicity of two different dimethoate formulations in the common toad (Rhinella arenarum) tadpoles
'Springer Science and Business Media LLC', 2019Co-Authors: Martinuzzi, Candela Soledad, Attademo, Andres Maximiliano, Peltzer Paola, Mac Loughlin, Tomas Mariano, Marino, Damian Jose Gabriel, Lajmanovich, Rafael CarlosAbstract:Dimethoate (D) are among the most commonly used organophosphates insecticides in the world. To evaluate the toxicity of two D formulations were selected as test organisms tadpoles of Rhinella arenarum. This toad species has an extensive neotropical distribution and is easy to handle and acclimate to laboratory conditions. The tadpoles were exposed in an acute assay for 48 h to D soluble Concentrates (DSC) and Emulsifiable Concentrates (DEC). The 48 h-LC50 (95% confidence limits) value of DSC was 57.46 mg L−1 (40.52–81.43) and to DEC was 12.76 mg L−1 (10.39–15.68). These differences in toxicity were statistically significant (p < 0.05). In both formulations, acetylcholinesterase), carboxylesterase, and glutathione-S-transferases enzyme activities varied significantly respect to those of control group (p < 0.05). The DEC formulation was the most toxic. These results would allow the assessment and characterization of potential ecological risks following the application of those formulations.Fil: Martinuzzi, Candela Soledad. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas. Laboratorio de Saneamiento Ambiental. Cátedra de Ecotoxicología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; ArgentinaFil: Attademo, Andres Maximiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas. Laboratorio de Saneamiento Ambiental. Cátedra de Ecotoxicología; ArgentinaFil: Peltzer, Paola. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas. Laboratorio de Saneamiento Ambiental. Cátedra de Ecotoxicología; ArgentinaFil: Mac Loughlin, Tomas Mariano. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de Química. Centro de Investigaciones del Medio Ambiente; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Marino, Damian Jose Gabriel. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de Química. Centro de Investigaciones del Medio Ambiente; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Lajmanovich, Rafael Carlos. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas. Escuela Superior de Sanidad; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentin
Rafael C Lajmanovich - One of the best experts on this subject based on the ideXlab platform.
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comparative toxicity of two different dimethoate formulations in the common toad rhinella arenarum tadpoles
Bulletin of Environmental Contamination and Toxicology, 2020Co-Authors: Candela Soledad Martinuzzi, Andres M Attademo, Paola M Peltzer, Tomas Mac M Loughlin, Damian Jose Gabriel Marino, Rafael C LajmanovichAbstract:Dimethoate (D) are among the most commonly used organophosphates insecticides in the world. To evaluate the toxicity of two D formulations were selected as test organisms tadpoles of Rhinella arenarum. This toad species has an extensive neotropical distribution and is easy to handle and acclimate to laboratory conditions. The tadpoles were exposed in an acute assay for 48 h to D soluble Concentrates (DSC) and Emulsifiable Concentrates (DEC). The 48 h-LC50 (95% confidence limits) value of DSC was 57.46 mg L-1 (40.52-81.43) and to DEC was 12.76 mg L-1 (10.39-15.68). These differences in toxicity were statistically significant (p < 0.05). In both formulations, acetylcholinesterase), carboxylesterase, and glutathione-S-transferases enzyme activities varied significantly respect to those of control group (p < 0.05). The DEC formulation was the most toxic. These results would allow the assessment and characterization of potential ecological risks following the application of those formulations.