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Ciclização cascata de o-diinil benzyl calcogenetos promovida por dicalcogenetos de diorganoíla e FeCl3
(Universidade Federal de Santa Maria, 2019-02-21)
The treatment of ortho-diynyl benzyl chalcogenides with a mixture of iron(III) chloride and diorganyl diselenides led to functionalized chalcogen isochromene-fused chalcogenophene derivatives. The reaction parameters were ...
Determinação de resíduos de avermectinas em soja, feijão e milho empregando método QuEChERS modificado e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2019-02-26)
Soybeans and beans are considered oleaginous plants of great economic importance in Brasil. Maize is a cereal that also generates profitability for the economy, but its use, to a large extent, is as animal feed. In the ...
Determinação simultânea multiclasse de fármacos em água de consumo humano empregando extração em fase sólida e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2019-02-26)
Pharmaceuticals are used in both human and veterinary medicine for the prevention and treatment of various diseases. The lack of adequate treatment for urban and industrial effluents associated with the incorrect disposal ...
Funcionalização da palha de milho com 3-aminopropiltrietoxisilano para adsorção do corante vermelho reativo 141
(Universidade Federal de Santa Maria, 2019-08-05)
An alternative and low cost adsorbent (CS–APTES) was developed by the functionalization corn stover (CS) with 3–aminopropyltrietoxysilane (APTES) using a simple method of reaction under reflux. The techniques of Fourier ...
Síntese de 1,3-oxazinas e 1,2,3-triazóis derivados de cumarina
(Universidade Federal de Santa Maria, 2019-02-19)
In this work we developed a methodology for the synthesis of 1,3-oxazines
derived from aminocoumarins by the hydroxymethylation/acetalization reaction with
aldehydes catalyzed by H2SO4 in aqueous media. The scope and ...
Determinação multirresíduo de agrotóxicos em aveia empregando cromatografia líquida acoplada à espectrometria de massas em série
(Universidade Federal de Santa Maria, 2019-02-27)
Many pesticides are used for pest control during oat production and storage, making necessary to employ multi-class methods for pesticide residues determination. For this purpose, the QuEChERS method allows adequate sample ...
Desenvolvimento de métodos de preparo de amostras para a determinação de impurezas elementares em medicamentos de uso oral
(Universidade Federal de Santa Maria, 2019-08-02)
In this study, sample preparation methods were developed for the digestion of oral
pharmaceutical drugs used in the treatment of type 2 diabetes, with the objective of
quantifying elemental ...
Estudo sobre a versatilidade do caráter metálico do elemento telúrio contido em sistemas moleculares
(Universidade Federal de Santa Maria, 2019-07-26)
This work presents the synthesis and detailed structural analysis of a series of new complex salts of organotellurium halides with an emphasis on exploring the versatility of the metallic character of the tellurium atom, ...
Estudo multivariado de algumas propriedades termodinâmicas dos elementos terras raras
(Universidade Federal de Santa Maria, 2019-02-22)
Lanthanides (La-Lu), Yttrium and Scandium form the group of rare earth elements (REE) are classified as light (LREE) and heavy (HREE). These elements are gaining prominence in surveys due to their economic potential as ...
Efeito da estrutura de líquidos iônicos derivados do imidazol no aquecimento de solventes moleculares sob irradiação com ultrassom
(Universidade Federal de Santa Maria, 2019-03-29)
In this work, the heating profile of water, dimethyl sulfoxide (DMSO), acetonitrile
(CH3CN) and ethanol (EtOH) and their solutions doped with imidazolium based ionic
liquids (ILs) mono- (CnMIMBr, n = 4,6,8,10,12,14, and ...