Fenton S Reaction
Mostrando 1-12 de 38 artigos, teses e dissertações.
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1. Oxidative stability, fatty acid composition and health lipid indices of Longissimus dorsi muscle from Aberdeen Angus steers produced in different feeding systems
RESUMO: O objetivo deste estudo foi avaliar o estado oxidativo e antioxidante do músculo Longissimus dorsi (LD), sem maturação e amadurecido, obtido de um matadouro comercial. Também foram comparados a composição de ácidos graxos e os índices lipídicos de saúde da carne calculados. Os animais abatidos foram os novilhos Aberdeen Angus criados em tr
Cienc. Rural. Publicado em: 25/11/2019
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2. A Practical Fluorescence-Based Screening Protocol for Polyethylene Terephthalate Degrading Microorganisms
We propose a practical, low-cost and selective fluorescence-based protocol adapted to identify polyethylene terephthalate (PET) degrading microorganisms. The microbial hydrolysis of PET nanoparticles was monitored by 2-hydroxyterephthalate, a fluorophore produced in situ after radical hydroxylation of terephthalic acid (TPA), the final hydrolysis product, by
J. Braz. Chem. Soc.. Publicado em: 2018-06
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3. ESTUDO MECANÍSTICO DAS REAÇÕES FENTON E CUPRO-FENTON POR ANÁLISE VOLTAMÉTRICA IN SITU
Although the classical Fenton process exhibits a high initial rate of the organic compounds degradation, this process is not complete due to the formation of refractory compounds which resist the attack of the hydroxyl radicals. In the presence of Cu(II), the degradation is slower, but results in a greater reduction of TOC (total organic carbon) measurements
Quím. Nova. Publicado em: 2017-08
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4. Yerba Mate Tea Extract: a Green Approach for the Synthesis of Silica Supported Iron Nanoparticles for Dye Degradation
This work describes a green approach to the synthesis of iron nanoparticles supported in silica using tea extract of the South American plant yerba mate (Ilex paraguariensis). Catalysts with different iron contents were obtained according to the reaction conditions employed. Characterization by X-ray powder diffraction (XRD) and scanning electron microscopy
J. Braz. Chem. Soc.. Publicado em: 2016-11
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5. Mechanistic implications of zinc(II) ions on the degradation of phenol by the fenton reaction
Um estudo da interferência de íons Zn2+ na reação de Fenton (Fe2+/Fe3+ + H2O2) na degradação de fenol é relatado. Um dos intermediários formados inicialmente na reação, catecol, pode reduzir Fe3+ a Fe2+, e na presença de H2O2 inicia um ciclo redox catalítico. Nas etapas iniciais da reação, este ciclo mediado por catecol torna-se a principal via
Journal of the Brazilian Chemical Society. Publicado em: 2012-07
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6. Electron paramagnetic resonance study of lipid and protein membrane components of erythrocytes oxidized with hydrogen peroxide
Electron paramagnetic resonance (EPR) spectroscopy of spin labels was used to monitor membrane dynamic changes in erythrocytes subjected to oxidative stress with hydrogen peroxide (H2O2). The lipid spin label, 5-doxyl stearic acid, responded to dramatic reductions in membrane fluidity, which was correlated with increases in the protein content of the membran
Brazilian Journal of Medical and Biological Research. Publicado em: 2012-06
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7. Tratamento de efluente tÃxtil utilizando o processo foto-fenton / Treatment of textile effluent using photo-fenton process
The aim of this work was to study the performance of the photo-Fenton process using both the artificial UV and solar sources on the textile effluent treatments. Preliminary photo-Fenton experiments for mineralization and degradation of organic and inorganic pollutants as well as of synthetic dyes were carried out in order to assess the best experimental cond
Publicado em: 2011
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8. Utilização da drenagem ácida de minas como reagente para tratamento do lixiviado do aterro sanitário de Campo Bom-RS : estudos de coagulação e reação de Fenton
Na região sul do Brasil, muito aterros sanitários encontram-se próximos a áreas de mineração de carvão, cujos rejeitos são ricos no mineral pirita (FeS2). Este trabalho teve como objetivo estudar o tratamento de lixiviado de aterro sanitário com coagulantes férricos e ferrosos produzidos a partir da oxidação da pirita em meio aquoso. O lixiviado
Publicado em: 2010
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9. RemoÃÃo do corante remazol amarelo ouro RNL 150% por fotocatÃlise homogÃnea
A indÃstria tÃxtil tem utilizado corantes que ao entrarem no meio aquÃtico comprometem a estÃtica das Ãguas e impedem a fotossÃntese, comprometendo os processos hidroquÃmicos. No contexto do tratamento dos efluentes indÃstriais, destacam-se os Processos Oxidativos AvanÃados (POAs) que apresentam alta eficiÃncia na degradaÃÃo de inÃmeros composto
Publicado em: 2009
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10. Avaliação da degradação do diclofenaco sódico utilizando H2O2/fenton em reator eletroquímico
This paper describes a degradation study of the anti-inflammatory sodium diclofenac in aqueous medium using an electro-chemical flow reactor with a gas diffusion electrode as cathode. Two degradation processes were compared: by H2O2 electro-generated and H2O2 electro-generated/Fe(II). Concentration of sodium diclofenac was determined during the experiments b
Química Nova. Publicado em: 2009
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11. Interações de peroxirredoxinas citossólicas da levedura Saccharomyces cerevisiae com peróxidos. Estudos cinéticos e funcionais / Saccharomyces cerevisiae cytosolic peroxiredoxin interactions with peroxides. Kinetics and functional studies
Peroxiredoxins constitute a family of cysteine-based peroxidases that are able to reduce hydrogen peroxide, organic peroxides and peroxinitrite to water, alcohol and nitrite, respectively, through the use of reducing equivalents provided by thioredoxin, thioredoxin reductase and NADPH. Peroxiredoxins are abundant enzymes (correspond to approximately 0.7% of
Publicado em: 2009
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12. Use of solar energy in the treatment of water contaminated with phenol by photochemical processes
The solar driven photo-Fenton process for treating water containing phenol as a contaminant has been evaluated by means of pilot-scale experiments with a parabolic trough solar reactor (PTR). The effects of Fe(II) (0.04-1.0 mmol L-1), H2O2 (7-270 mmol L-1), initial phenol concentration (100 and 500 mg C L-1), solar radiation, and operation mode (batch and fe
Brazilian Journal of Chemical Engineering. Publicado em: 2008-12