Consulta: creatorFacets:"Trevizan,Luiz Roberto Pimentel"
Registros recuperados: 4
Data/hora: 05/06/2024 17:13:13

Residues of carbosulfan and its carbofuran metabolites and 3-hydroxy-carbofuran in oranges
Provedor de dados: 94
Autores: Trevisan,Marcos José; Baptista,Gilberto Casadei de; Trevizan,Luiz Roberto Pimentel; Papa,Geraldo.
The objectives of this study were to evaluate the residues of the insecticide carbosulfan and its carbofuran metabolites and 3-hydroxy-carbofuran in orange compartments (whole fruit, bagasse and juice) and comparison between the residual levels found in fruits with the maximum residue level and the safety interval established by the Brazilian legislation. Two field experiments were carried out, both with the following treatments: a-check; b-one application of 10 g of carbosulfan . 100 L-1 of water; c-one application with twice the rate applied in treatment b; d-four applications with the same rate applied in treatment b. Samples were taken at (-1), zero, 1, 3, 7, 14, 21 and 28 days after the last or unique application. The quantitative determinations were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrus sinensis; Metabolism; Pesticide residues in citrus; Maximum residue level; Safety interval.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452004000200012

Fenitrothion and esfenvalerate stability during corn and wheat sample processing
Provedor de dados: 63
Autores: Vásquez-Castro,Javier Alberto; Baptista,Gilberto Casadei de; Trevizan,Luiz Roberto Pimentel; Gadanha Junior,Casimiro Dias.
The presence of insecticide residues in cereals represents a risk for the consumer, because these substances are used in large scale to protect stored grains from the attack of pests. The effects of three processing methods for corn and wheat samples on the stability of stored-grain protective insecticides were here evaluated. Fenitrothion and esfenvalerate were applied so as to produce theoretical concentrations of 10 and 0.5 mg kg-1, respectively. Two hours after treatment, the grains were processed and deposition was analyzed by gas chromatography. Grain species did not influence insecticide stability. This stability was only dependent upon the processing method and insecticide type. Grains processed together with dry ice provided the greatest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Stored grain; Insecticide degradation; Dry ice; Gas chromatography.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000200008

Resíduos de deltametrina em grãos de trigo e em seus produtos processados, determinados por cromatografia gasosa
Provedor de dados: 63
Autores: Trevizan,Luiz Roberto Pimentel; Baptista,Gilberto Casadei de.
O objetivo do presente estudo foi avaliar a degradação/persistência do inseticida piretróide deltametrina em grãos de trigo e em seus produtos processados, a saber: farelo, farinha branca, farinha integral e pão. Os grãos foram tratados de modo a alcançar a concentração teórica de 0,35 mg kg-1 do piretróide. As amostras foram tomadas a zero, 15, 30, 60 e 90 dias após a aplicação. Houve tendência de concentração do piretróide no farelo de trigo e um menor acúmulo nas farinhas, sendo que após o processo de cozimento do pão observou-se perda do inseticida.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Piretróide; Grão armazenado; Farelo; Farinha; Pão.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162000000200002

Effect of spray volume on the moisture of stored corn and wheat grains
Provedor de dados: 52
Autores: Vásquez-Castro,Javier Alberto; Baptista,Gilberto Casadei de; Gadanha Junior,Casimiro Dias; Trevizan,Luiz Roberto Pimentel.
The goal of this work was to evaluate the effect of spray volume on the moisture of the stored grains of the corn and wheat. Two kg of each type of the grain were placed into the plastic bags and sprayed with the theoretical doses of 0, 1, 3, 5, 8, and 10 liters of water / ton of the grain. The grain moisture content was evaluated 24 h after the spray operation by the oven method. The increase in the grain moisture was quadratic and showed the same trend in both the corn and wheat. The grain moisture after spraying 10 L.t-1 showed little increase (0.8 %) as compared to the initial moisture content. Thus, the application of any spray volume as used in this study made no difference for a possible better uniformity in the distribution of insecticide...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Stored products; Chemical control; Application technology; Desorption; Hygroscopic equilibrium.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000300003