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Now showing items 21-30 of 46
Aplicação de nanopartículas em filmes utilizados em embalagens para alimentos
(Universidade Federal de São Carlos, 2009-04-30)
Dispersions composed of chitosan (CS) were obtained by the template polymerization (CS-PMAA) and ionotropic gelatinization (CS-TPP). The nanoparticles were analyzed by FT-IR analysis, particle size, zeta potential, electron ...
Desenvolvimento e aplicação de eletrodos compósitos quimicamente modificados com hidróxido e fosfato de cátions metálicos para determinação voltamétrica de analitos de interesse alimentício e farmacêutico
(Universidade Federal de São Carlos, 2009-08-14)
The construction and evaluation of three modified carbon composite electrode (MCCE): MCCE-Cu3(PO4)2, MCCE -Ni(OH)2 and MCCE-resin-Cu(II) are described. These electrodes were applied for the determination of antioxidants ...
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 ...
Desenvolvimento de métodos eletroanalíticos para a determinação do diuron e ametrina e estudos de sorção em solos sob mata e cana-de-açúcar
(Universidade Federal de São Carlos, 2009-07-29)
It is vital to know the mechanisms and processes of interaction between pesticides and the environment and monitor the groundwater, surface water and soil in intensively used areas which such products for the evaluation ...
Estudo fitoquímico de Rauia sp e atividades sobre formigas cortadeiras e sobre a lagarta-do-cartucho do milho
(Universidade Federal de São Carlos, 2009-09-11)
The control of agriculture plague is relevant to Brazil that has large crop area. The control, by natural product, generally low toxic to humans and to animals and specific to target plague, is recommended. This work ...