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Now showing items 41-50 of 710
Preparação, caracterização e testes de filmes bicamadas de polipirrol-poli(DMcT) sobre fibra de carbono para eletrodos de supercapacitores
(Universidade Federal de São Carlos, 2013-10-25)
The aim of this work was to synthesize and characterize bilayered films of polypirrole and poly(2,5- dimercapto-1,3,4-thiadiazole) poly(DMcT) as possible materials for supercapacitor electrodes. Composites of carbon ...
Emprego de técnicas espectroanalíticas para a análise de amostras de solos e de coprólitos : análise de textura e exploratória
(Universidade Federal de São Carlos, 2015-08-21)
In this
study, samples of coprolites (fossilized feces) were analyzed in LIBS (Laser-Induced
Breakdown Spectroscopy) to evaluate the chemical profile in these samples using
hyperspectral images, which enable us to assess ...
Desenvolvimento de procedimentos analíticos para a avaliação de nanosuspensões de fertilizantes e efeitos sobre a produtividade de culturas agrícolas
(Universidade Federal de São Carlos, 2016-04-04)
This study was carried out in three steps: 1) production and characterization of nanosuspensions; 2) development of analytical methods for elemental analysis of fertilizers and plant tissues and comparison between ...
Propriedades elétricas e estruturais do niobato de potássio e estrôncio obtido pelo método de Pechini
(Universidade Federal de São Carlos, 2015-06-19)
The
search for new technologies more efficient and environmentally sustainable,
triggered the search for new materials and synthesis routes that present a low
economic and energy impact. In this context, potassium and ...
Multicomponent reactions in the discovery of organocatalysts and the diversification of organocatalytic approaches
(Universidade Federal de São Carlos, 2015-06-19)
This thesis reports the development of multicomponent approaches directed to specific objectives: a) the discovery of new and efficient peptide-based catalyst for asymmetric
transformations and b) the synthesis of ...
Métodos multimídias no ensino de conceitos de química
(Universidade Federal de São Carlos, 2015-08-10)
Multimedia resources can aid in visualizing fundamentals aspects to the teaching chemistry, mainly, by the fact that there are some contents which are of difficult understanding by the students. In addition, those technological ...
Combinação de infravermelho próximo e ferramentas quimiométricas para análise de material desfibrado de cana-de-açúcar
(Universidade Federal de São Carlos, 2015-01-29)
The Monsanto Company presents in one of its segments the
development of varieties of sugacane which have high productivity. The productive
capacity of these clones is measured using at lest six analytical parameters: ...
Laminação sob atmosfera controlada dos sistemas MgH2 e MgH2 - LaNi5 para armazenagem de hidrogênio
(Universidade Federal de São Carlos, 2016-08-04)
Magnesium hydride is a promisor candidate for H2 storage, manly due its high hydrogen gravimetric capacity (7.6% wt), low density, abundance and low cost. However, its
H-absorption/desorption occurs only at temperatures ...
Funcionalização e caracterização do carbon black vulcan XC–72R para aplicações em biossensores baseados em inibição enzimática
(Universidade Federal de São Carlos, 2016-02-18)
In this work, carbon black Vulcan XC-72R was functionalized using five different treatments, the oxidizing agents employed were: nitric acid, sulfuric acid and hydrogen peroxide. The physical characterization of functionalized ...
Desenvolvimento e aplicação de análise de especiação química de selênio em amostras agropecuárias
(Universidade Federal de São Carlos, 2016-01-28)
Selenium is essential in animal nutrition; it ensures proper functioning of musculoskeletal, reproductive, and immune system. The intake requirement range for Se is narrow and low levels of Se are required. In order to ...