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Desenvolvimento de sistema em fluxo empregando ultrassom para remoção de enxofre de óleo diesel
(Universidade Federal de Santa Maria, 2011-02-18)
In this work, the development of a continuous flow process for sulfur removal
from diesel oil is proposed. The process is based on the application of ultrasonic
energy for increasing the oxidation reaction rate of sulfur ...
Remoção de hidrocarbonetos policíclicos aromáticos por substratos sólidos estudos com amberlite XAD-2, polietileno, poliuretano, sílica e fibra de quartzo
(Universidade Federal de Santa Maria, 2013-09-19)
Polycyclic aromatic hydrocarbons (PAHs) are a class of compounds characterized by having two or more condensed aromatic rings. These substances, as well as their nitrated and oxygenated derivatives, can be found widely ...
Avaliação de adsorventes sólidos para a remoção de derivados de HPAs em solução
(Universidade Federal de Santa Maria, 2014-03-12)
Polycyclic aromatic hydrocarbons, nitrogen and oxygen (Nitro-PAHs and Oxy-PAHs) compose the class of compounds where a hetero atom of nitrogen and oxygen, respectively, is present in the constitution of the HPA. The inclusion ...
Determinação voltamétrica de zinco, cádmio, chumbo, cobre, selênio e manganês em ovos de galinha
(Universidade Federal de Santa Maria, 2014-03-13)
The quality of the food deserves great attention due to its the influence on human nutrition and health. Food is the primary source of essential elements for humans, but also the main source of exposure to toxic elements. ...
Estudo fitoquímico e avaliação das atividades antimicrobiana, de inibição enzimática e antitumoral de Erythrina crista-galli nativa do RS
(Universidade Federal de Santa Maria, 2013-09-05)
The phytochemical study of the crude extract hexane, methanol and fractions (acid ether, basic ether and basic acetate) from the stem bark of E. crista-galli (Fabaceae) resulted in the isolation of four compounds: The ...
Condensação de knoevenagel na síntese de novos sistemas heteroaroil-cumarínicos trifluormetil substituídos
(Universidade Federal de Santa Maria, 2014-03-19)
With the aim to verify the influence of the presence of the trifluoromethyl group and the heterocyclic precursor in the heteroaroyl-coumarin synthesis, this dissertation describes firstly a methodology optimization to ...
Síntese nanoparticulas metálicas estabilizadas por copolímeros em bloco com aplicação em reação de redução e acoplamento de Suzuki
(Universidade Federal de Santa Maria, 2014-03-07)
The catalytic activity of hierarchical hybrid structures, formed by metal nanoparticles, M-NPs (AuNPs and PdNPs), synthesized and stabilized by block copolymers, is reported in this present work. The catalytic activity was ...
Emprego de microextração líquido-líquido dispersiva em mel para posterior determinação de cádmio e chumbo por espectrometria de absorção atômica com chama
(Universidade Federal de Santa Maria, 2014-01-09)
Honey has become an important environmental indicator, due to its various botanical and geographical sources, since bees come into contact with different environments that could be contaminated with toxic elements. Among ...
Avaliação de métodos de decomposição de grafite flexível para determinação de elementos traço por ICP OES
(Universidade Federal de Santa Maria, 2014-02-05)
In this work different methods of sample preparation were evaluated for flexible graphite digestion. Dry ashing decomposition, microwave-assisted wet digestion (MAWD) and microwave-induced combustion (MIC) were applied for ...
Novos complexos de prata(I) com fenil e difenilfosfinato
(Universidade Federal de Santa Maria, 2013-06-21)
New compounds phenylphosphinates and diphenylphosphinates silver (I) were synthe-sized and characterized with two coordination polymers and five molecular coordination complexes. The phosphinates are in oxygen-metal strong ...