Search
Now showing items 41-50 of 398
Degradação eletroquímica do antibiótico ciprofloxacina utilizando eletrodos de diamante dopado com boro e dióxido de chumbo
(Universidade Federal de São Carlos, 2014-04-30)
Initial potentials for the oxygen evolution reaction (OER) of 2.23, 2.30, 2.36, and ~1.55 V vs. Ag/AgCl (3 mol L 1 KCl) were obtained by linear sweep voltammetry (LSV) in 0.1 mol L 1 Na2SO4 for the 2500, 100, and 500 ppm ...
Estudo da eletroxidação de CO e metanol sobre eletrodos multicamadas metálicas Ptpc/Rh/Pt
(Universidade Federal de São Carlos, 2014-07-28)
Fuel cell is an alternative studied in recent years for energy conversion. A problem of this type of device is the choice of anode material and fuel used. Thus, different materials have been proposed besides the pure metals, ...
Estudo da influência dos parâmetros de síntese na preparação de nanopartículas de óxidos magnéticos de ferro por rota solvotérmica
(Universidade Federal de São Carlos, 2013-09-24)
This work presents the development and the optimization of the synthesis of magnetic nanoparticles of iron oxides by the solvothermal method with benzyl alcohol using iron chlorides as metallic precursors in substitution ...
Materiais híbridos obtidos pela adsorção de nanopartículas metálicas sobre fungos micelares pelo efeito biotemplate
(Universidade Federal de São Carlos, 2014-02-18)
The use of bio-design concepts is a promising strategy for obtaining materials with properties of great scientific and technological interest. There are numerous examples of materials obtained by employing concepts of ...
Nanopartículas de Pt-TiO2 com propriedades catalíticas e fotocatalíticas
(Universidade Federal de São Carlos, 2013-04-23)
In the first part of this work, a binary system composed of TiO2 and Pt particles was used as photocatalyst for degradation of methyl orange under different lighting conditions: simulated sunlight and ultraviolet. In these ...
Novos complexos de Ru(II) e Mg(II) com flavonóides : atividade tóxica, sítios ativos e mecanismos de ação
(Universidade Federal de São Carlos, 2012-11-09)
The use of pesticides in agriculture, in order to enhance and ensure food production for a growing population has led to many concerns about risks to human health and the environment. Therefore, search for new strategies ...
Síntese e avaliação da atividade biológica de neolignanas e análogos
(Universidade Federal de São Carlos, 2012-04-17)
Substituted benzofurans and neolignans have considerable pharmacological potential. In this work, we report some synthetic methods for the construction of these rings, as well as their derivatives. Through the oxidative ...
Síntese e propriedades fotocatalíticas de heteroestruturas TiO2/SnO2
(Universidade Federal de São Carlos, 2014-03-14)
Heterostructures, systems containing two dissimilar semiconductors in direct contact, has been applied in heterogeneous photocatalysis due to their electronic properties. This work aimed at studying heterostructures ...
Nanocompósitos de polietileno linear de baixa densidade (LLDPE)/argila montmorilonita: processamento, morfologia e propriedades
(Universidade Federal de São Carlos, 2013-06-25)
Polymer nanocomposites filled with lamellar silicates are considered hybrid materials (organic-inorganic) of great interest both in industry and the universities, since their properties are superior to neat polymer. In ...
Uso de modelos moleculares por alunos de ensino médio : contribuições para o desenvolvimento de modelos mentais de conceitos químicos
(Universidade Federal de São Carlos, 2012-12-07)
This study aimed to analyze the contribution of molecular models to the evolution process of the mental models of first grade high school students regarding the following chemical concepts: substance, reactants, products, ...