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Now showing items 31-40 of 249
Estudos do crescimento anódico de óxidos e da deposição de apatitas sobre a liga biocompatível Ti-13Nb-13Zr
(Universidade Federal de São Carlos, 2009-10-30)
Studies on the anodic growth of oxide films passivating the biocompatible alloy Ti-13Nb-13Zr (m/m) and the formation of hydroxyapatite (HA) films on these oxides were carried out in this work. The oxides were grown either ...
Estudo da corrosão do aço ao carbono em meio de sulfeto
(Universidade Federal de São Carlos, 2009-09-08)
This work presents a study of the 1020 and 1040 carbon steel corrosion in aqueous solution containing dissolved H2S in order to investigate the effect of H2Saq and HSaq species. Some different electrolytes were used: acetic ...
Estudos eletroquímicos das ligas biocompatíveis Ti-50Zr (at.%) e Ti-13Nb-13Zr (m/m).
(Universidade Federal de São Carlos, 2004-08-23)
Studies on the anodic growth of the oxides that passivate the biocompatible alloys Ti-50Zr (at.%) and Ti-13Nb-13Zr (m/m), on the electrochemical/electrical parameters and the morphology, composition and structure of these ...
Desempenho eletroquímico de compósitos de nanotubos de carbono como anodos para baterias de íon-lítio
(Universidade Federal de São Carlos, 2008-10-10)
In this work CNTs composite for use as Li-ion anode materials had been investigated. The electrochemical properties of the electrodes were measured by galvanostatic charge-discharge testes, cyclic voltammetric analysis and ...
Ordem-desordem: uma avaliação estrutural do Ba(ZrxTi1-x)O3
(Universidade Federal de São Carlos, 2009-08-07)
This work have as aim, the synthesis of ceramic powders of Ba(ZrxTi1¡x)O3 (x = 0, 0.25, 0.50, 0.75 and 1) by the polymeric precursor method and investigate the degree of structural order-disorder of these systems by different ...
Síntese e avaliação biológica de uma coleção de flavonóides
(Universidade Federal de São Carlos, 2009-05-29)
The flavonoids are an important class of polyphenolic compounds present in relative abundance among the secondary metabolites of plants and are found in fruits, vegetables, nuts, seeds, flowers, tea, honey and propolis. ...
Desenvolvimento de procedimento automático para determinação fotométrica de N-ureídos totais em leguminosas empregando multicomutação em fluxo
(Universidade Federal de São Carlos, 2007-07-28)
This work aimend the development of an automated procedure for photometric determination of total ureide in soybean tissues using multicommutation in flow analysis. The photometric detection was based on the formation of ...
Desenvolvimento de procedimentos analíticos limpos para a determinação de cloreto e demanda química de oxigênio em águas.
(Universidade Federal de São Carlos, 2004-12-17)
The work here described deals with the development of clean analytical methods for
determination of chloride and chemical oxygen demand in water samples.
A flow injection spectrophotometric method was developed for
determining ...
Transporte de vapor de água e sorção de CO2 em filmes de polisulfona: efeito das variáveis de processamento e envelhecimento físico.
(Universidade Federal de São Carlos, 2004-08-31)
Water vapor transport properties and CO2 sorption were studied for bisphenol A Polysulfone films, PSF, prepared with different thickness via solvent casting and a compression molding. From the measurements of water vapor ...
Preparação e caracterização de compósitos de polianilina (DMcT Cu(II)) / fibra de carbono como catodos em baterias secundárias.
(Universidade Federal de São Carlos, 2004-12-17)
The composites were obtained by cyclic voltammetry and the
incorporation of Cu(II) to the Pani(DMcT) / C fiber composite was carried out by two
methods: A) Cu(II) added to the polymerization electrolyte along with the ...