Partition In Low Temperature
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. A Simple and Efficient Optimized Solid-Liquid Extraction with Low Temperature Partition Procedure for Dissipation and Translocation Study of Pesticide Residues in Rice Grains
Pesticides are used globally to protect food against pest attack. This study evaluates the dissipation of bifenthrin and deltamethrin residues in unhulled rice and the translocation of these insecticide residues in husked rice stored at 25 °C in a biochemical oxygen demand (BOD) incubator for 35 days. For pesticide determination, the simple and efficient so
J. Braz. Chem. Soc.. Publicado em: 2020-10
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2. Optimization and Validation of LLE-LTP and QuEChERS Methodologies for Determining 2,4-D in Water Samples
2,4-Dichlorophenoxyacetic acid (2,4-D) has been one of the main herbicides used to control weeds, however, due to its high use it can promote episodes of environmental contamination. Therefore, this study aimed to optimize and validate the liquid-liquid extraction with low-temperature partition (LLE-LTP) and the quick, easy, cheap, effective, rugged, and saf
J. Braz. Chem. Soc.. Publicado em: 2020-09
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3. Produção e purificação integrada de protease fibrinolítica de Mucor subtilissimus UCP 1262
RESUMO As enzimas fibrinolíticas podem ser obtidas de micro-organismos por meio de processos fermentativos. O presente trabalho teve como objetivo avaliar a produção e extração integrada da protease fibrinolítica de Mucor subtilissimus UCP 1262 usando sistema de duas fases aquosas (SDFA). O processo integrado foi realizado para avaliar a produção, pa
Arq. Bras. Med. Vet. Zootec.. Publicado em: 06/06/2019
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4. Simultaneous Determination of 2,3,7,8-TCDD and 2,3,7,8-TCDF in Water Samples by LLE-LTP and HPLC-DAD
Polychlorinated dibenzo-p-dioxins and dibenzofurans are persistent organic pollutants which can mainly be found in the environment in water. These compounds are highly toxic and therefore developing new extraction methodologies that are simpler and cost less is highly desirable. This study aimed to optimize and validate the liquid-liquid extraction with low-
J. Braz. Chem. Soc.. Publicado em: 23/05/2019
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5. Otimização, validação e aplicação de método para determinação da concentração residual de difenoconazol em morangos após múltiplas aplicações
Difenoconazole residues in strawberry fruit cultivated in pots were estimated using the solid-liquid extraction with low temperature partition (SLE/LTP) method for sample preparation and gas chromatography with electron capture detection (GC/ECD) for analysis. The optimized method presented excellent recovery values from fortified samples and reproducibility
Quím. Nova. Publicado em: 2014
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6. Análise de agrotóxicos em água usando extração líquido-líquido com partição em baixa temperatura por cromatografia líquida de alta eficiência
This study optimized and validated the liquid-liquid extraction technique with partition at low temperature (LLE-PLT) for identification and quantification of four pesticides (chlorpyrifos, λ-cyhalothrin, permethrin, bifenthrin) in water samples. Analyses were performed by HPLC-UV. The technique was efficient for pesticide recovery with extraction exceeding
Quím. Nova. Publicado em: 2012
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7. Extração sólido-líquido com partição a baixa temperatura e seu emprego na análise multirresíduos de agrotóxicos em uva e derivados / Solid-liquid extraction with partition at low temperature and its use in multiresidue analysis of pesticides in grapes and its derivates
The objectives of this work were to optimize and validate the solid-liquid extraction technique with partition at low temperature (ESL-PBT) for multiresidue analysis of samples of grapes by gas chromatography with electron capture detector (GC-ECD). During the optimization procedure of solid-liquid extraction technique with partition at low temperature, fact
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/02/2011
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8. Avaliação da técnica de extração com partição em baixa temperatura na análise de carbamatos em alimentos e bebidas / Evaluation of extraction technique to partition into low temperature for the analysis of carbamates in foods and beverages
Os carbamatos são agrotóxicos empregados nas culturas de café, citrus e batata são comumente encontrados em alimentos e bebidas de coloração escura nos casos de intoxicação acidental ou intencional em investigações criminais. Estudos de otimização, validação, estabilidade e efeito de matriz na análise de carbamatos pela técnica de extração
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/08/2010
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9. Análise multirresíduo de agrotóxicos em abacaxi por CG/DCE / Analysis multiresidue of pesticides in pineapple by GC/ECD
The objectives of this work were to optimize the technique of extraction by matrix solid-phase dispersion (MSPD) and the solid-liquid with partition in low temperature extraction technique (SLE-LTP), and to validate this latter, to the residues analysis of the pesticides atrazine, thiamethoxam, triadimenol and deltamethrin in pineapple samples, by gas chroma
Publicado em: 2010
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10. Phytochemical study of the species Serjania lethalis St. Hil. / Estudo fitoquímico da espécie Serjania lethalis St. Hil.
The brazilian is biodiversity considered one of higher of the world, is a bit know and explored as the source of drugs medicines. In search of new bioactive molecules the etanolic extract of stem of Serjania lethalis St. Hil was studied in for the molluscicide, miracicide and shistossomicida activity. The specie S. lethalis was collected in Brasilia and a vo
Publicado em: 2008
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11. Structural geology of northern limb of the Paraiba do Sul river divergent structure: cross-sections Três Rios (RJ) - Matias Barbosa (MG) and Barra do Piraí - Conservatória (RJ) / Geologia estrutural da aba norte da estrutura divergente do rio Paraíba do Sul: seções Três Rios (RJ) - Matias Barbosa (MG) e Barra do Piraí - Conservatório (RJ)
This study is about the structural geology of a portion of the Central Mantiqueira Province which corresponds to the north side of the structural divergence of the Rio Paraíba do Sul valley. Two geological cross-sections (Três Rios - Matias Barbosa and Barra do Piraí - Conservatória) provided geometrical and kinematics data. Lattice preferred orientation
Publicado em: 2008
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12. Dissipação e monitoramento dos inseticidas clorpirifós e thiamethoxam em tubérculos e solo cultivado com batata (Solanum tuberosum L.) / Dissipation and monitoring of chlorpyrifos and thiamethoxam in potato (Solanum tuberosum L.) tubers and soil
The objectives of this study were to evaluate dissipation of insecticides chlorpyrifos and thiamethoxam in potato plants during development and monitor pesticide residues in tubers grown in southern Minas Gerais and in samples collected from retail markets in Viçosa-MG. First, the solid-liquid extraction at partition at low temperature (SLE-PLT) was optimiz
Publicado em: 2008