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Itens para a visualização no momento 141-150 of 200
Estudo da aplicação de brometo de índio(I) em reações para formação de ligações carbono-carbono
(Universidade Federal de Santa Maria, 2011-03-01)
This PhD thesis describes our results on the application of indium(I) bromide in carbon-carbon bond forming reactions. Indium enolates, generated in situ from the reaction between indium(I) bromide and α,α-dichloroketones, ...
Determinação de elementos terras raras por espectrometria de absorção atômica de alta resolução com fonte contínua por chama
(Universidade Federal de Santa Maria, 2018-08-29)
In the present work, two methods of determination of rare earth elements by high resolution continuum source flame AAS was developed, being a sequential and a simultaneous method. The sequential method allowed the determination ...
Ciclização eletrofílica intramolecular de (Z)-calcogenoeninos: síntese e reatividade de calcogenofenos e (Z)-calcogenetos vinilicos
(Universidade Federal de Santa Maria, 2019-02-22)
In the present thesis, efficient methods were developed to the synthesis of a series of heterocycles by electrophilic cyclization of (Z)-chalcogenoenynes 1, and chalcogenophenes 2, mediated by species of I2 and/or RSeBr. ...
Compostos de coordenação envolvendo aroil(N,N-dialquil-calcogenoureias) monopodais e bipodais
(Universidade Federal de Santa Maria, 2014-01-24)
This work presentes the study realized with monopodal and bipodal aroyl(N,N-dialkylchalcogenoureas) involving different metallic ions to obtain mononuclear, dinuclear and trinuclear compounds. The compounds were characterized ...
Constituintes químicos de óleos voláteis de plantas medicinais do Rio Grande do Sul: isolamento, determinação estrutural e atividade biológica.
(Universidade Federal de Santa Maria, 2012-05-04)
The essential oils of six species of plants wild in south Brazil, were investigated as for its chemical composition, antibacterial activity and antioxidant potential. The selected species for this study were Calea clematidea ...
Análise fitoquímica de duas espécies de Rutaceae: Helietta apiculata Benth e Zanthoxylum fagara (L.) Sarg.
(Universidade Federal de Santa Maria, 2016-03-11)
The phytochemical investigation of methanol crude extract of the stem bark of the species
Helietta apiculata Benth and Zanthoxylum fagara (L.) Sarg., Rutaceae, provided the isolation
of thirty-one compounds. The species ...
Análise de especiação de arsênio por HG AAS com aprisionamento criogênico e uso de multiatomizador
(Universidade Federal de Santa Maria, 2010-02-08)
In this work a procedure for arsenic speciation using criogenic trapping coupled to hydride generation atomic absorption spectrometry (HG-CT-AAS) was developed. Biological (chiken liver) and drug (N-methylglucamine ...
4-(trifluormetil)haloquinolinas: síntese, reações de acoplamento cruzado C-C e C-N, propriedades fotoluminescentes e antimicrobianas
(Universidade Federal de Santa Maria, 2018-03-23)
In this thesis, methodologies were developed in order to obtain novel trifluormethyl substituted quinolines through intramolecular cyclocondensation reactions with subsequent C-C and C-N cross coupling of the Sonogashira, ...
Bário em soluções de nutrição parenteral e medicamentos: origem, níveis de contaminação e avaliação da distribuição no organismo em modelo animal
(Universidade Federal de Santa Maria, 2012-03-21)
Barium (Ba) contamination in solution for parenteral nutrition (PN) and drugs was
studied. The concentration of Ba was determined by F-AAS in glass and plastic packaging
used to store the formulations, since the compounds ...
Síntese e análise estrutural de clusters binários e ternários derivados de bis(fenilselenolato) de mercúrio Hg(SePh)2
(Universidade Federal de Santa Maria, 2012-03-30)
This work deals with the synthesis and structural analysis of binary and
ternary clusters derivatives from mercury bis(phenylselenolate) - Hg(SePh)2.
The reaction of Hg(SePh)2 with Mg(II), Fe(II), Co(II) and Ni(II) metal ...