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Aroilbis(N,N-dietiltioureatos) de cádmio (II) e chumbo (II): síntese e caracterização
(Universidade Federal de Santa Maria, 2014-07-18)
This work introduces the synthesis of two novel ligands belonging to the aroylbis(thiourea) class to study the spacer group influence in the complexes structure. Five membered rings were utilized as spacer groups such as ...
Síntese de novos azóis derivados da 1,1- difenilacetona
(Universidade Federal de Santa Maria, 2014-08-07)
This work describes an efficient method to obtaining new heterocycles from the reaction of acetalization of the ketonic carbonyl, followed by acylation of the enolether, generated in situ from the acetal derivative of ...
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. ...
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 ...
Produção biotecnológica de ácido itacônico a partir da casca de arroz
(Universidade Federal de Santa Maria, 2014-03-24)
Rice Husks (RH) can be regarded as an abundant lignocellulosic raw material in the Brazilian southern(se for somente regiões do RS, SC e PR fica South region, senão, tá ok) region, renewable and practically without economic ...
Determinação de poluentes orgânicos persistentes (pops) em leite materno: desenvolvimento e aplicação de método analítico empregando GC-NCI-MS
(Universidade Federal de Santa Maria, 2014-03-12)
Persistent Organic Pollutants (POPs) receive this designation because of the time that remain unchanged in the environment. From the 1960s there was already evidence of the presence of these compounds in sediment, breast ...