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Itens para a visualização no momento 11-20 of 910
Síntese de novos heterociclos a partir do ácido levulínico
(Universidade Federal de Santa Maria, 2009-01-26)
The synthesis of new compounds alkyl 3-azolyl propanoate e alkyl 3-azolyl
propanoic acid structurally analogues to gamma-aminobutiric acid (GABA) is
reported. One more time using the acetal acylation method, now the ...
Mecanismo reacional de etanotiol em eletrodo de ouro e seu comportamento em sistemas redox
(Universidade Federal de Santa Maria, 2012-08-10)
Sulphur compounds can interfere with product quality of the wine, since they have a
characteristic undesirable odor. The ethanethiol is considered an interesting compound from
the electrochemical point of view, since it ...
Estrutura Molecular e Supramolecular de Pirazolo[1,5- a]pirimidinas
(Universidade Federal de Santa Maria, 2010-05-07)
This work describes the molecular and supramolecular structure of fourteen pyrazolo[1,5-a]pyrimidines from bond lengths, torsion angles, angles between planes and interatomic distances. The data discussed were originated ...
Síntese e aplicação de calcogenetos derivados de peptídeos em catálise assimétrica
(Universidade Federal de Santa Maria, 2010-07-12)
In the present work, we have developed a flexible, modular synthetic route for the preparation of new chiral chalcogen peptide derivatives containing sulfur,
selenium or oxygen and evaluate their application as catalysts ...
Síntese e arranjos supramoleculares de complexos Bis(triazenido) macrocíclicos e triazenido 1-óxido com os cátions Cu2+, Ni2+, Cu+, K+
(Universidade Federal de Santa Maria, 2010-06-09)
This work elaborates on the determination of crystal and molecular structures of four pro-ligands, emphasizing bis(triazenes), triazene 1-oxide and a new class of bis(triazenes) macrocyclic, and eight complexes involving ...
Síntese, Caracterização Estrutural e Propriedades Luminescentes de Complexos de Lantanídeos (III) com Hidrazonas e Semicarbazonas derivadas da 2,6-Diformilpiridina e com Triazenos 1-óxidos.
(Universidade Federal de Santa Maria, 2011-03-30)
Lanthanide complexes with ligands containing oxygen and nitrogen as donor atoms have been investigated in this study aiming to explore the coordinative behavior of metals with high coordination numbers, as well as a study ...
Anti-inflamatório dexametasona: estudos de biodegradabilidade, toxicidade, ocorrência e degradação oxidativa avançada em efluente hospitalar
(Universidade Federal de Santa Maria, 2010-12-15)
The presence of drugs and active substances in the environment has been a concern in recent years. A range of these compounds have been found in water treated in sewage
treatment effluents, surface waters and less frequently ...
Método rápido para a determinação simultânea de resíduos de agrotóxicos e medicamentos veterinários em alimentos de origem animal por LC-MS/MS
(Universidade Federal de Santa Maria, 2011-03-03)
Currently, one of highest trade barriers that Brazil has found for the marketing of their products from the agribusiness chain is the lack of informations on the presence of residues in foods produced in the country. Due ...
Análise estrutural de complexos derivados de telúrio
(Universidade Federal de Santa Maria, 2011-03-18)
This work describes the synthesis and structural analysis of different kinds of
tellurium based compounds, depicting the preparation of zwitterions, coordination
polymers and also heteronuclear complexes, using ...
Determinação de halogênios em carvão, coque petroquímico e alimentos após combustão iniciada por microondas
(Universidade Federal de Santa Maria, 2008-03-14)
The microwave-induced combustion (MIC) method was applied for coal and petroleum coke digestion for further determination of bromine, chlorine, fluorine and iodine
by ion chromatography (IC). Samples (up to 500 mg) were ...