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Síntese coloidal de nanocristais magnéticos com superfície macromolecular
(Universidade Federal de São Carlos, 2009-08-17)
This dissertation describes the development of a synthetic route to obtain colloidal magnetic nanocrystals in solvent of high molar weight and different polarities. Magnetite Nanocrystals ware synthesized by thermal ...
Estudo da influência do complexo bórico-sorbitol no processo de eletrodeposição, morfologia e composição da liga Zn-Mn
(Universidade Federal de São Carlos, 2009-02-19)
Zn-Mn electrodeposition on to platinum using an acid electrolyte based on boric acid (BA) or boric-sorbitol complex (BSC) has been studied. The influence of these additives concentrations on the electrodeposition process ...
Utilização do sinal de fundo e calibração multivariada como um procedimento para acessar a concentração total de concomitantes em espectrometria de absorção atômica com forno tubular na chama e aerossol térmico (TS-FF-AAS)
(Universidade Federal de São Carlos, 2009-02-19)
TS-FF-AAS employs a metal tube atomizer above an air/acetylene flame and in this case, the atoms residence time is longer than that observed in FAAS (Flame AAS). As a result, elevated background signals are obtained. For ...
Tubos atomizadores de titânio em espectrometria de absorção atômica com forno tubular na chama e aerossol térmico (TS-FF-AAS) para a determinação de cobre em materiais biológicos
(Universidade Federal de São Carlos, 2009-02-13)
In this work it was used Ti atomizers tubes employing TS-FF-AAS system to improve the analytical performance of FAAS. The TS-FF-AAS was applied for Cu determination in food and biological samples. The Ti tubes were used ...
Desenvolvimento de estratégias para a determinação espectrofotométrica sequencial em fluxo de Co (II) e Mn (II)
(Universidade Federal de São Carlos, 2009-07-24)
In this study a kinetic-spectrophotometric method was developed for sequential determination of Co and Mn in pharmaceutical samples. The method was based on the catalytic effect of the analytes in the oxidation reaction ...
Fracionamento de zinco em amostras de leite
(Universidade Federal de São Carlos, 2009-02-26)
This work studies were aimed at samples preparation and chemical speciation levels zinc in samples of different kind
of milk (milk cattle, sheep, goat, and soybean milk base). The proposal aimed to establish the differences ...
Estudo da influência dos aditivos manitol, EDTA e NTA no processo de eletrodeposição de zinco sobre aço 1010 e na morfologia dos eletrodepósitos
(Universidade Federal de São Carlos, 2009-08-21)
In this paper the effects of adding mannitol, EDTA or NTA to an alkaline deposition bath on the electrodeposition of zinc on to AISI 1010 steel substrate were evaluated. Voltammetric curves of 1010 steel in deposition bath ...
Compósitos de Polipirrol e Li1,05Mn2O4 : preparação por dip coating ou casting e caracterização eletroquímica
(Universidade Federal de São Carlos, 2009-08-21)
Films of polypyrrole/Li1.05Mn2O4 composites were prepared by chemical synthesis over a carbon-fiber substrate, using the dipcoating and casting techniques, aiming at improving the performance of these materials as cathodes ...
Estudos biossintéticos de amidas bis-fenilpropanoídicas produzidas pelo fungo Penicillium brasilianum, um endofítico de Melia azedarach (Meliaceae)
(Universidade Federal de São Carlos, 2009-02-12)
In the present work it was developed analytical methodologies for investigation of biosynthesis of bis-phenylpropanoyl amides, using labeled precursors in the culture medium. The effect of different nitrogen sources on the ...
Construção e aplicação de um Turbidímetro / Nefelômetro Microcontrolado Portátil
(Universidade Federal de São Carlos, 2009-07-30)
Development of a portable, simple and inexpensive equipment with adequate sensitivity for turbidimetric and/or nephelometric sequential analyses practically simultaneous is the aim of this study. In fact, in-situ and on-line ...