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Now showing items 31-40 of 249
Preparação e caracterização de compósitos de polipirrol (LiMn2O2)/ fibra de carbono para catodos em baterias secundárias.
(Universidade Federal de São Carlos, 2003-08-19)
Composites of polypyrrol (Ppy) and LiMn2O4 were
synthesized chronoamperometrically at 0.8 V (vs. ECS) in 0.1 mol.L-1 LiClO4 /acetonitrile (2% H2O added) electrolyte containing 0.1 mol.L-1 of the pyrrol monomer, on carbon ...
O envolvimento do aluno no processo de ensino - aprendizagem durante a realização de atividades experimentais.
(Universidade Federal de São Carlos, 2005-06-10)
This work had as an objective to identify the motivation level of the students who belong to three public grade schools in the city of São Carlos with different socio-economical
realities for the chemistry learning. ...
Desenvolvimento de procedimentos de digestão para óleos lubrificantes.
(Universidade Federal de São Carlos, 2005-04-29)
In this work it was developed a digestion procedure for lubricant oil based on gradual addition of sample aliquots on hot and concentrated oxidant acids. The element concentrations in the diluted digestates were determined ...
Determinação de polifenóis totais utilizando sistemas de análise por injeção em fluxo.
(Universidade Federal de São Carlos, 2004-02-17)
In this dissertation, three flow injection analysis methods for total polyphenol
determination in tea and acacia s tannins commercial extracts were developed. The first method is based on the reaction between the polyphenol ...
Qualidade da água e fluxos de nutrientes na interface sedimento-água nas represas do Rio Tietê.
(Universidade Federal de São Carlos, 2003-04-30)
The first Law of Fick in one dimension was utilized for the calculation of those fluxes.
In this work was calculated the concentrations of the following chemical species: nitrate, nitrite, ammonium, total nitrogen, ...
Estudos microgravimétricos da deposição de cobre sobre eletrodos de cromo passivado.
(Universidade Federal de São Carlos, 2002-11-29)
Recently were obtained in our laboratory results indicating that Cu deposition on
Cr2O3 happens in two steps: at the first one, there is the deposition of an amount
smaller than one Cu monolayer, and at the second one there ...
A reação de Diels-Alder de p-Benzoquinonas em versão multicomponente
(Universidade Federal de São Carlos, 2005-08-24)
A study of the multicomponent version of the Diels-Alder reaction of para-benzoquinones has been proposed, with the idea of uniting the versatility of the reaction with the simplicity of the methodology. The key step ...
Estudo das etapas sintéticas de complexos mistos de ftalocianinas de zinco e cobalto com tetrafenilporfirina de zinco
(Universidade Federal de São Carlos, 2004-09-13)
A systematic study of synthetic steps in the
formation of phthalocyanine and porphyrin mixed complexes, having pyrazine as
bridged ligand is described in this work. Two mixed complexes series were
obtained, keeping ...
Perfil cromatográfico e análise multivariada para o controle de qualidade de amostras comerciais do gênero Phyllanthus (quebra-pedra)
(Universidade Federal de São Carlos, 2008-12-05)
This work present the development and application of methods by High Performance Liquid Chromatography (HPLC) to the quality control of vegetable samples known as stone breaker , that correspond to Phyllanthus species, ...
Síntese de nanocristais coloidais de TiO2 via método solvotermal
(Universidade Federal de São Carlos, 2008-08-07)
This work presents a systematic study about preparing titanium oxide nanoparticles by solvothermal method. TiO2 is a much studied material because its applications in areas like catalysis, sensors, energy conversion devices, ...