Ltp
Mostrando 1-12 de 264 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. Effects of intra-dentate gyrus microinjection of myokine irisin on long-term potentiation in male rats
RESUMO A indução de potenciação de longo prazo (LTP) aumenta a capacidade de armazenamento das sinapses no giro denteado (DG) do hipocampo. A irisina é uma miocina gerada a partir do FNDC5 (um precursor genético) durante o exercício. Embora a administração intra-Cornu Ammonis1 de irisina fortaleça a LTP em camundongos com doença de Alzheimer, os e
Arq. Neuro-Psiquiatr.. Publicado em: 10/01/2020
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4. Preoperative anxiety induces chronic postoperative pain by activating astrocytes in the anterior cingulate cortex region
RESUMO OBJETIVO O objetivo deste estudo é explorar a relação entre a ansiedade no pré-operatório e a dor crônica no pós-operatório. MÉTODOS Um total de 40 ratos foram divididos em quatro grupos: controle, estresse prolongado (SPS), histerectomia e SPS + histerectomia. Os limiares de retirada da pata em resposta a estímulo mecânico (PWMT) foram
Rev. Assoc. Med. Bras.. Publicado em: 10/10/2019
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5. 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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6. Pyrethroid insecticide residue in ‘Grande Naine’ banana peel and pulp during maturation
Abstract In banana farming, the bagging of bunches with bags impregnated by pyrethroid insecticide is a practice that prevents damage to fruits caused by insect pests. The aim of this study was to monitor the presence and permanence of bifenthrin residue during the maturation of ‘Grande Naine’ banana by gas chromatography coupled to mass spectrometer in
Food Sci. Technol. Publicado em: 30/07/2018
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7. OTIMIZAÇÃO DA EXTRAÇÃO SÓLIDO-LÍQUIDO COM PARTIÇÃO EM BAIXA TEMPERATURA PARA DETERMINAÇÃO DE CARBOFURANO EM Cucurbita pepo L (“ABOBRINHA”) POR CROMATOGRAFIA LÍQUIDA DE ALTA EFICIÊNCIA
According to results of the Program of Analysis of Pesticide Residues in Foods of the National Agency of Sanitary in Brazil (2013 to 2015) the zucchini, Cucurbita pepo L is one of the non-hardy vegetables, that presented higher contamination index by pesticides residues. One of these agrochemicals is carbofuran, which although not authorized for this crop, i
Quím. Nova. Publicado em: 2018-02
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8. Solid-Liquid Extraction with Low Temperature Purification Coupled with Gas Chromatography and Mass Spectrometry for Determination of Polychlorinated Biphenyls in Sewage Sludge
Sewage sludge is the residue produced by the wastewater treatment plants, which can be used as soil conditioner in agriculture. However, the current legislation recommends monitoring chemical contaminants such as polychlorinated biphenyls (PCBs). In this study, solid-liquid extraction with low temperature purification (SLE-LTP) was optimized and validated fo
J. Braz. Chem. Soc.. Publicado em: 2017-01
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9. Expression profiles of sugarcane under drought conditions: Variation in gene regulation
Abstract Drought is a major factor in decreased sugarcane productivity because of the resulting morphophysiological effects that it causes. Gene expression studies that have examined the influence of water stress in sugarcane have yielded divergent results, indicating the absence of a fixed pattern of changes in gene expression. In this work, we investigated
Genet. Mol. Biol.. Publicado em: 03/11/2015
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10. Determination of Pesticides in Soil Using a Hyphenated Extraction Technique
A new method for the extraction of pesticide residues from soil was developed, optimized, validated and applied to real samples. The technique consisted of combining single-drop microextraction and solid-liquid extraction with low temperature partitioning (SLE/LTP-SDME) followed by analysis using gas chromatography with electron capture detection (GC/ECD). T
J. Braz. Chem. Soc.. Publicado em: 2015-09
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11. A simple and efficient method employing solid-liquid extraction with low-temperature partitioning for the determination/monitoring of pesticide residues in strawberries by GC/ECD
O uso indiscriminado de agrotóxicos em morangos pode torná-los impróprios para consumo. Neste estudo, o método extração sólido-líquido com partição em baixa temperatura (SLE/LTP) acoplado a cromatografia gasosa com detector por captura de elétrons (GC/ECD) foi otimizado. O método proposto foi validado pela análise de amostras fortificadas do bra
J. Braz. Chem. Soc.. Publicado em: 2014-08
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12. Desenvolvimento do método de extração sólido-líquido com partição em baixa temperatura para determinação de inseticidas em grãos de milho ozonizados
The objective of this study was to optimize and validate a solid-liquid extraction method with low-temperature partitioning (SLE/LTP) for the analysis of pesticides. This method was coupled with gas chromatography (GC/ECD) and used to evaluate the degradation of bifenthrin and pirimiphos-methyl in maize grains on exposure to ozone. The optimized SLE/LTP-GC/E
Quím. Nova. Publicado em: 2014-04