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Now showing items 571-580 of 648
Tratamento metrológico e quimiométrico de dados de ressonância magnética nuclear para amostras de biodiesel em diesel
(Universidade Federal de São Carlos, 2012-03-29)
The development of instrumentation in Nuclear Magnetic Resonance (NMR) increased the sensitivity of the technique, allowing samples in micro and nanogram scale can be examined. These new technologies enabled the NMR technique ...
Síntese e investigações estruturais de arranjos supramoleculares formados por metaloporfirinas e metaloftalocianinas
(Universidade Federal de São Carlos, 2012-06-29)
This thesis involves the syntheses and characterization of four heterotriads formed by metallotetraphenylporphyrins (CoTPP and NiTPP) and metallophthalocyanines (CoPc and NiPc) using pyrazine (pz) and trans-1,2-bis(4-pyr ...
Estrutura cristalina e eletrônica do CaS: teoria do funcional de densidade aplicada a modelos periódicos
(Universidade Federal de São Carlos, 2014-02-26)
The incessant search for better materials with diverse applications and increasingly smaller size has been performed by numerous research groups. The calcium sulfide semiconductors have been the focus of study for applications ...
Determinação e degradação eletroquímica do estrogênio natural estrona usando anodos de diamante dopado com boro
(Universidade Federal de São Carlos, 2013-12-06)
Different electrochemical techniques were used to characterize the boron-doped diamond (BDD) electrode and to determine estrone. After parameters optimization, the detection limits obtained using differential pulse voltammetry ...
Modelos miméticos de catecol dioxigenase e catecol oxidase: correlação entre estrutura e atividade catalítica de complexos mononucleares de ferro(III) e binucleares de cobre(II) contendo bases de Schiff
(Universidade Federal de São Carlos, 2014-12-15)
In this work binuclear copper(II) complexes and mononuclear iron(III) complexes were studied as functional mimetic models of enzymes capable of catalyze the oxidation of catechols. Different structures of the complexes ...
Os professores da escola de educação básica e suas contribuições na formação dos bolsistas de iniciação à docência da área de química
(Universidade Federal de São Carlos, 2013-08-30)
In this study we investigated the role of employees and trainer teachers of a public school for basic education of São Carlos, in hosting and collaborating with Chemistry teaching initiation scholarship fellows, participants ...
Metal sulfides: photoluminescence and photocatalytic properties
(Universidade Federal de São Carlos, 2013-08-30)
In this work we report an experimental and theoretical study of photoluminescence (PL) and photocatalytic activity of pure metal sulfides and systems furnished prepared by microwave assisted solvothermal (MAS) method. The ...
Análise foliar de plantas por espectrometria de emissão óptica com plasma induzido por laser (LIBS) e com plasma acoplado indutivamente após ablação com laser (LA-ICP OES)
(Universidade Federal de São Carlos, 2013-09-20)
It has been demonstrated that laser induced breakdown spectrometry (LIBS) can be used as an alternative method for the determination of macro (P, K, Ca, Mg) and micronutrients (B, Fe, Cu, Mn, Zn) in pellets of plant ...
Estudo do processo de liberação lenta de fertilizantes a partir de nanocompósitos de matriz ureia
(Universidade Federal de São Carlos, 2014-04-04)
The efficient use of fertilizers, especially nitrogen ones, is essential and strategic for the obtention of maximum economic crop yields and to minimize the loss of nutrients into the environment. Among the technologies ...
Estudo fitoquímico de Conchocarpus marginatus (Rutaceae), e avaliação do potencial biológico dos compostos isolados
(Universidade Federal de São Carlos, 2013-03-27)
The specie Conchocarpus marginatus is native from Espírito Santo. This plant, that was recently reclassified by PIRANI e KALLUNKI, does not show chemical or biological data in literature yet. In this way, the phytochemical ...