Redox Process
Mostrando 1-12 de 166 artigos, teses e dissertações.
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1. Tuning the Photocatalytic Activity of Tin Oxide through Mechanical Surface Activation
Tin oxide (SnO2) nanoparticles were synthesized by the co-precipitation method and mechanically modified by high-energy ball milling. The experimental results demonstrate that the collision with zirconia balls produces slight changes in the crystalline, electronic, morphological, and surface properties of SnO2, which lead to an increase in the redox potentia
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. Voltammetric Generation and Kinetic Stability of Nitro Anion Radical from Nitrofurazone in Ionic Liquids
The nitrofurazone (NF) electrochemical reduction has been studied by cyclic voltammetry (CV) and square wave voltammetry (SWV) in non-aqueous medium using three different ionic liquids (IL): BMImTf2N, BMImBF4 and BMMImTf2N, having a carbon fiber microelectrode as working electrode. In all of them, two reversible cathodic peaks were recorded for NF. Under hig
J. Braz. Chem. Soc.. Publicado em: 2021-04
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3. Light Response of Three Water-Soluble MnI PhotoCORMs: Spectroscopic Features and CO Release Investigation
Currently, there is great interest in the study of water-soluble metal compounds capable of releasing carbon monoxide, due to their potential therapeutic use. This paper reports the synthesis, spectroscopic characteristics and CO release properties of three water-soluble manganese(I) carbonyl compounds [Mn(aaz)(CO)3]Br (1; where aaz = 6-amino-6-methylperhydr
J. Braz. Chem. Soc.. Publicado em: 24/10/2019
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4. Twice-weekly exercise training reduces oxidative stress and proinflammatory cytokine levels in elder women
Abstract Aim: Reactive oxygen species and high concentrations of proinflammatory cytokines are related to diseases that are often triggered during the aging process. This study aimed to investigate the effect of moderate-intensity physical exercise, twice a week, on oxidative stress and inflammation biomarkers. Methods: Participants were older women aged 6
Motriz: rev. educ. fis.. Publicado em: 26/09/2019
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5. Recombination Study of Dye Sensitized Solar Cells with Natural Extracts
Natural dyes can be used in dye sensitized solar cells (DSSCs) to generate low-cost devices, although with low light harvesting because of energy losses from the recombination process. This study investigates recombination reactions in DSSCs with natural dyes extracted from eggplants, plums, and hibiscus flowers. Titanium dioxide films were coated on a fluor
J. Braz. Chem. Soc.. Publicado em: 2019-02
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6. Cryotherapy: biochemical alterations involved in reduction of damage induced by exhaustive exercise
When exercises are done in intense or exhaustive modes, several acute biochemical mechanisms are triggered. The use of cryotherapy as cold-water immersion is largely used to accelerate the process of muscular recovery based on its anti-inflammatory and analgesic properties. The present study aimed to study the biochemical effects of cold-water immersion trea
Braz J Med Biol Res. Publicado em: 04/10/2018
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7. IMOBILIZAÇÃO DE COMPLEXO DE RUTÊNIO CONTENDO BASE DE SCHIFF NA UNIDADE METALOORGÂNICA UiO-67
Zirconium-based metal-organic framework, UiO-67, was synthesized and used as support for the immobilization of the [RuCl2(ENAPY)] (ENAPY = N,N'-bis(7-metyl-2-pyridylmethylene)-1,2-diiminoethane)). The immobilized system exhibited violet-blue color. The {UiO-67/[RuCl2(ENAPY)]} was characterized by cyclic voltammetry, X-ray diffraction, UV-Vis, FTIR and X-ray
Quím. Nova. Publicado em: 2018-07
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8. Synthesis and thermal behavior of polyacrylonitrile/vinylidene chloride copolymer
Polyacrylonitrile fiber encompasses a broad range of products based on acrylonitrile (AN) which is readily copolymerized with a wide range of ethylenic unsaturated monomers giving rise to polymers with different characteristics and applications. Such products can be designed for cost-effective, flame and heat resistant solutions for the textile industry, air
Polímeros. Publicado em: 27/05/2014
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9. Eletrodo compósito à base de grafite-Araldite®: aplicações didáticas - parte II
This work proposes the use of a graphite-Araldite® 70% (graphite, m/m) composite electrode in didactic experiments, specifically in the quantitative determination of the neurotransmitter dopamine (DA) in a sample of pharmaceutical formulation. The goal is to demonstrate the possibility of using voltammetric techniques in quality control of medicines, beside
Quím. Nova. Publicado em: 2014-04
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10. Síntese e caracterização de nanoestruturas peptídicas: estudos espectroscópicos e aplicações / Synthesis and characterization of peptide nanostructures: spectroscopic studies and applications
The study had as aimed the development of nanostructured materials based on processes of molecular self-assembly of peptide compounds in order to obtain systems of great structural versatility seeking possible applications related to bionanotechnology. In this regard, peptide sequences based on linear and cyclic precursors were synthesized by solid-phase met
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2012
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11. Influência do eletrólito na eletrodeposição de nanopartículas de Cu sobre eletrodo de diamante dopado com boro
This paper presents the electrolyte influence on deposition and dissolution processes of Cu nanoparticles on boron doped diamond electrodes (BDD). Morphological, structural and electrochemical analysis showed BDD films with good reproducibility, quality and reversible in a specific redox system. Electrodeposition of Cu nanoparticles on DDB electrodes in thre
Química Nova. Publicado em: 2012
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12. Filmes de diamante nano/ultrananocristalinos dopados com boro: propriedades morfológicas, estruturais e eletroquímicas / Boron doped nano/ultrananocrystalline diamond films: morphological, structural and electrochemical properties
É apresentado um estudo sistemático do processo de obtenção e caracterização de filmes de diamante nanocristalino dopados com boro. Os filmes foram obtidos pela técnica HFCVD (\textit{Hot Filament Chemical Vapor Deposition}), utilizando como fonte de dopante uma solução de óxido de boro em metanol. A princípio, na primeira série de experimentos v
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/12/2011