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Now showing items 31-40 of 176
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 ...
Desenvolvimento de métodos para estudo de dioxinas presentes na cinza do bagaço da cana-de-açúcar : avaliação do potencial biorremediador de cepas microbianas em compostagem aeróbica
(Universidade Federal de São Carlos, 2012-03-30)
Sugarcane bagasse ash is a byproduct of sugar and alcohol industry with potential for field application. However, the presence of organic contaminants such as dioxins turns necessary the development of strategies for removal ...
Estruturas cristalinas e moleculares de indóis 1,3- substituídos
(Universidade Federal de São Carlos, 2012-10-30)
This work consists of 7 chapters. In Chapter 1 a description of the problems addressed here are presented, starting with a brief story about the development of Xray diffraction crystallography, starting with the description ...
Estudo da atividade eletrocatalítica de multicamadas metálicas de Ir/Pt e Cu/Pt eletrodepositadas sobre Pt(policristalina) para eletrooxidação de moléculas orgânicas pequenas
(Universidade Federal de São Carlos, 2013-09-26)
The search for alternative energy sources stead fossil fuel has driven the development of new energy generating devices. Among these, the Direct Alcohol Fuel Cells are a kind of device that directly convert chemical energy ...
Obtenção do sistema TiO2:Ag na forma de filmes nanoestruturados em filtros cerâmicos para aplicação em fotocatálise
(Universidade Federal de São Carlos, 2014-02-19)
In this study, it was aimed to obtain powders and thin films of titanium dioxide (TiO2) with silver (Ag) deposited on ceramic filters, synthesized by the polymeric precursor method for degradation of rhodamine B dye under ...
Estudo fitoquímico de Eugenia myrcianthes: busca de substâncias bioativas
(Universidade Federal de São Carlos, 2014-04-04)
The search for new substances with bioactive potential is the target of numerous studies inserted in the chemistry of natural products, since it involves the isolation, the structural elucidation, as well as the action ...
Estudo de incorporação de whiskers de celulose em polietileno de baixa densidade (PEBD)
(Universidade Federal de São Carlos, 2014-04-29)
This research proposed the obtainment of cellulose whiskers from cotton fibers and their application in low density polyethylene matrix (LDPE). Cellulose whiskers was obtained from acid hydrolysis of cotton fibers and the ...
Desenvolvimento de métodos eletroanalíticos empregando o eletrodo de diamante dopado com boro para a determinação simultânea de edulcorantes e corantes em produtos alimentícios
(Universidade Federal de São Carlos, 2014-06-18)
In this work, three electroanalytical proceduces were developed for simultaneous determination of sweeteners (aspartame (AS) and acesulfame-K (AK)) and colorants (sunset yellow (SY), indigo carmine (IC) and allura red (AR)) ...
Químio-, régio- e estereosseletividades das reações de Diels-Alder de para-benzoquinonas: um estudo teórico
(Universidade Federal de São Carlos, 2014-07-23)
In this work, some computational theoretical studies on the reactivity of para-benzoquinones and their derivatives in Diels-Alder reactions were proposed These studies were done in order to compliment the corresponding ...