P Nitrophenol
Mostrando 1-12 de 114 artigos, teses e dissertações.
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1. Magnetized Biochar as a Gold Nanocatalyst Support for p-Nitrophenol Reduction
The biomass use is of considerable ecological and economical interest and here, biochar, a by-product of biomass carbonization, is magnetized with Fe3O4 for its use as gold nanoparticle (NP) support towards catalysis of p-nitrophenol (4-NP) reduction. Biochar was synthesized from coffee straw biomass via pyrolysis, while magnetite functionalization was obtai
J. Braz. Chem. Soc.. Publicado em: 2021-08
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2. Gold Nanorods Capped with Different Ammonium Bromide Salts on the Catalytic Chemical Reduction of p-Nitrophenol
It is known that the reactivity of the nanocatalytic systems is related to the particle size and shape and also to the features of the capping agents on the nanostructures. In this study, gold nanorods (AuNRs) were synthesized by the seed-mediated method using different tetra-alkylammonium bromide salts as capping agents, that are, cetyltrimethylammonium (CT
J. Braz. Chem. Soc.. Publicado em: 2021-06
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3. Magnetic and Mesoporous Silica-Niobia Material as Modifier of Carbon Paste Electrode for p-Nitrophenol Electrochemical Determination
In the present work, the sol-gel synthesis method was employed as strategy to obtain a magnetic and mesoporous silica-niobia material. The planned synthesis was based on the hetero-condensation of niobium and silicon alkoxide precursors, in the presence of spherical magnetite particles. The resulting material presented interesting characteristics such as mag
J. Braz. Chem. Soc.. Publicado em: 2021-03
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4. Heterogeneous photo-Fenton and photocatalytic degradation studies of 2-chloro-4-nitrophenol (2Cl4NP) using foundry sand and TiO2 coated cement/clay beads
ABSTRACT Cement and clay beads coated with TiO2were used for the photo-degradation and mineralization of 2-chloro-4-nitrophenol (2Cl4NP) along with a heterogeneous solar photo-Fenton process using foundry sand (FS) as the iron source. The degradation process was optimized using slurry photocatalysis where 96% degradation of 2Cl4NP was achieved in 120 min at
Braz. J. Chem. Eng.. Publicado em: 2017-07
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5. Ag Nanoparticles-Based Zinc Hydroxide-Layered Hybrids as Novel and Efficient Catalysts for Reduction of 4-Nitrophenol to 4-Aminophenol
Silver nanoparticles and zinc hydroxide-layered hybrid materials (AgNPs/ZHL) have been successfully developed as efficient catalysts for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) with sodium borohydride. A facile and rapid visible-light assisted green route was used for the deposition of silver nanoparticles (AgNPs) on the external surfac
J. Braz. Chem. Soc.. Publicado em: 2017-01
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6. Dispersive Liquid-Liquid Microextraction Based on Solidification of Floating Organic Drop with Central Composite Design for the Determination of Nitrophenols Using High-Performance Liquid Chromatography
A simple and practical pre-concentration method, dispersive liquid-liquid microextraction based on solidification of a floating organic drop (DLLME-SFO) technique, was proposed for the determination of 4-nitrophenol and 2-nitrophenol in water samples. The effective experimental parameters on the extraction efficiency such as extraction solvent volume, disper
J. Braz. Chem. Soc.. Publicado em: 2015-10
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7. SOLUÇÃO TAMPÃO QUE MIMETIZA AS CARACTERÍSTICAS ÁCIDO-BASE DO TAMPÃO SMP EM RESPOSTA À ACIDEZ DE SOLOS BRASILEIROS / A BUFFER SOLUTION THAT MIMICS THE ACID-BASE CHARACTERISTICS OF THE SMP BUFFER IN RESPOSNSE TO THE ACIDITY OF BRAZILIAN SOILS
No Brasil, o tampão SMP vem sendo utilizado desde a década de 60 como o principal método para a estimativa da acidez potencial e/ou da necessidade de calcário do solo. No entanto, em sua composição, a solução SMP apresenta p-nitrofenol e cromato de potássio, substâncias essas com elevado potencial de contaminação ambiental e capazes de promover o
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/02/2011
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8. Modulation of expression and activity of cytochrome P450s and alteration of praziquantel kinetics during murine schistosomiasis
In this study, we investigated the expression and activity of liver cytochrome P450s (CYPs) and praziquantel (PZQ) kinetics in mice infected with Schistosoma mansoni. Swiss Webster (SW) mice of both genders were infected (100 cercariae) on postnatal day 10 and killed on post-infection days (PIDs) 30 or 55. Non-infected mice of the same age and sex served as
Memórias do Instituto Oswaldo Cruz. Publicado em: 2011-03
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9. ARGILAS MONTMORILONITAS NATURAIS E MODIFICADAS COM SURFACTANTES APLICADAS NA ADSORÇÃO DO AZUL DE METILENO E P- NITROFENOL EM SOLUÇÃO AQUOSA.
Corantes e compostos fenólicos são substâncias amplamente usadas em diversas indústrias, tais com as têxteis, alimentícias, petrolíferas entre outras. Essas indústrias enfrentam problemas na remoção dessas substâncias, em seus efluentes, devido estabilidade de suas moléculas. Muitos adsorventes alternativos vêm sendo estudados na remoção dos c
Publicado em: 2010
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10. Characterization of rat heart alkaline phosphatase isoenzymes and modulation of activity
Alkaline phosphatase (ALP) is important in calcification and its expression seems to be associated with the inflammatory process. We investigated the in vitro acute effects of compounds used for the prevention or treatment of cardiovascular diseases on total ALP activity from male Wistar rat heart homogenate. ALP activity was determined by quantifying, at 41
Brazilian Journal of Medical and Biological Research. Publicado em: 2008-07
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11. Quaternization reaction of 2-vinylpyridine and 4-vinylpyridine network copolymers for 4-nitrophenol adsorption
Este artigo avalia o emprego de copolímeros porosos (a base de estireno-STY e vinilpiridina-VP, reticulados com divinilbenzeno-DVB) como adsorventes de 4-nitrofenol de soluções aquosas. Os copolímeros foram sintetizados através de polimerização em suspensão aquosa via radical livre na presença de heptano (HEP) e tolueno (TOL) em diferentes proporç�
Journal of the Brazilian Chemical Society. Publicado em: 2007-04
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12. Activity of liver microsomal enzymes during the chronic phase of murine schistosomiasis
The effects of schistosomiasis on microsomal enzymes were studied on post-infection day 90 when accumulated damage and fibrosis are most intense but granulomatous reaction around the eggs harbored in the liver is smaller than during the earlier phases. Swiss Webster (SW) and DBA/2 mice of either sex (N = 12 per sex per group) were infected with 100 Schistoso
Brazilian Journal of Medical and Biological Research. Publicado em: 22/03/2007