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Now showing items 21-30 of 1427
Preparação e caracterização de blendas de PANI/ABS
(Universidade Federal de São Carlos, 2009-03-16)
Polyaniline (PANI) chemical synthesis was monitored in situ by means of electrochemical impedance, open circuit potential (Voc) and mass variation. We verify that the final properties of the polymer could be practically ...
Estudo mecânico-quântico ab initio da propriedade fotoluminescente em compostos PbWO4, BaWO4, SrWO4 e dos processos de intercalação e difusão de Li no composto Li1+xTi2O4
(Universidade Federal de São Carlos, 2008-04-18)
Computational simulation by means of quantum-mechanical calculations is becoming an increasingly important tool in scientific research of materiaIs due the great advances in the performance of computers and in the development ...
Estudo dos processos de eletrodeposição de filmes finos de Se, ZnSe e PbS
(Universidade Federal de São Carlos, 2008-03-13)
This work describes studies on the underpotential deposition (UPD) of selenium, zinc, as well for Zn/Se systems deposited on polycrystalline Pt electrodes in acid solutions. The effects of Zn presence in the Se dissolution ...
Avalição química e da capacidade de biossorção da grama batatais (Paspalum notatum) visando aplicações analíticas.
(Universidade Federal de São Carlos, 2004-09-03)
This work suggests the chemical characterization of the genus Paspalum and was divided in 3 steps: 1) sample preparation of plants with diluted acids; 2) biosorption studies employing
Paspalum notatum root material, and ...
Estrutura e propriedade fotoluminescente do titanato de bário e cálcio obtido pelo método de polimerização de complexos (MPC)
(Universidade Federal de São Carlos, 2008-06-16)
The synthesis and characterization of Ba1-xCaxTiO3 (BCT) for x = 5; 10; 15; 20; 40 e 80 % mol that crystallizes in a perovisquita structure were studied in this work. The BCT material was synthesized by CPM which allows ...
Estudo do mecanismo de oxidação do herbicida atrazina na presença de minerais e sustâncias húmicas em ambiente anaeróbio.
(Universidade Federal de São Carlos, 2005-12-14)
The oxidative decomposition of atrazine was induced by hydroxyl radicals generated from the interaction between hydrogen peroxide, H2O2, and iron oxides, yielding the
Fenton reaction. The reaction rate of atrazine oxidation ...
Um problema parabólico com condição de fronteira não-linear e peso indefinido: existência, regularidade, bifurcação e estabilidade de equilíbrios
(Universidade Federal de São Carlos, 2008-04-24)
This work is concerned with a parabolic problem, occuring in population genetics,
under a nonlinear Neumann boundary condition with a weight of indefinite sign and
a positive parameter. Considering a phase space appropriate ...
Alguns aspectos químicos envolvidos na interação Hypsipyla grandella (broca-do-mogno e Swietenia macrophylla (Mogno)
(Universidade Federal de São Carlos, 2002-11-08)
The interaction between Hypsipyla grandella (Mahogany bore) and Swietenia macrophylla was studied in order to understand the chemical and ecological aspects involved on this process. H. grandella is a shoot borer lepdoptera ...
Projeto e implementação de um serviço de interpretação de contexto em apoio à preparação e resposta a emergências
(Universidade Federal de São Carlos, 2009-07-16)
In this MSc project an interpretation service was designed and implemented containing a knowledge base built from the integration of ontologies and a fuzzy inference system. Besides interpreting what is occurring in the ...
Sistema para a oferta de serviços baseados em localização com garantias de privacidade do usuário
(Universidade Federal de São Carlos, 2009-06-02)
The use of geographical information about users is the main quality of Location Based Services (LBS). Services like finding nearest hotels and restaurants, weather forecasting or traffic conditions verifying are some of ...