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Itens para a visualização no momento 11-19 of 19
Síntese e análise estrutural de haletos de organilcalcogênios ( Se e Te ) com estados de oxidação mistos
(Universidade Federal de Santa Maria, 2007-03-22)
This work describes the synthesis and structural analysis of new organochalcogen halides with mixed oxidation states in the same molecule. Studies in the solid state by X-ray diffraction reveal a general tendency to associate ...
Magnetoimpedância e dinâmica da magnetização em nanoestruturas ferromagneto/Cu (Ag)/ferromagneto
(Universidade Federal de Santa Maria, 2007-08-17)
In this work the static and dynamic magnetic properties are investigated in FM/i/Cu(Ag)/i/FM tri-layer structured samples where FM is the ferromagnetic multilayer and i is the SiO2 isolating layer. All samples have been ...
Síntese e análise estrutural de novos polímeros de coordenação e compostos moleculares de fosfinatos metálicos
(Universidade Federal de Santa Maria, 2007-12-03)
In this work, the structures of coordination polymers and molecular compounds Cu(II), Hg(II), Pb(II) and Cd(II) with phenylphosphinate or diphenylphosphinate ligands were determined and are discussed. The reaction of ...
Determinação de alumínio e ferro em fluidos pós-hemodiálise empregando voltametria e decomposição de amostras com radiação ultravioleta
(Universidade Federal de Santa Maria, 2007-10-19)
The simultaneous determination of Al(III) and Fe(III) in post-hemodialysis fluids was investigated by the Adsorptive stripping voltammetry (AdSV) of solochrome violet (SVRS) metal complexes. The analytes build electroche ...
Avaliação da auto-associação molecular de complexos metálicos com ligantes triazenidos derivados do 1,3-bis(fenil)triazeno
(Universidade Federal de Santa Maria, 2007-09-13)
This work presents the synthesis and the investigation of the crystalline and molecular structure of 1,3-bis(2-methoxy-4-nitrophenyl)triazene ethanol and seventeen new mononuclear or binuclear complexes of Cu(I), Cu(II), ...
Síntese, estrutura e avaliação da atividade antimicrobiana de complexos metálicos com sulfametoxazol
(Universidade Federal de Santa Maria, 2007-03-16)
This work presents the study of compounds obtained from interaction of sulfamethoxazole with copper, cadmium, mercury and nickel acetates, gold triphenilphosphine acetate / chloride and with silver chloride. The synthesis ...
Estudo fitoquímico e atividade biológica de Pavonia distinguenda A.ST.- HILL. et naudin e Dorstenia brasiliensis LAM
(Universidade Federal de Santa Maria, 2007-03-01)
From the aerial parts of Pavonia distinguenda the glycosilated flavonoids, tirosilide and astragalina glycolilated flavonoids were isolated, among free b-sitosterol, lupeol, taraxerol, germanicol and from the roots of ...
Estudo de métodos empregando HPLC-DAD e LC-MS/MS para a determinação de resíduos de herbicidas em água e solo do cultivo de arroz irrigado
(Universidade Federal de Santa Maria, 2007-12-20)
The irrigated agriculture of Rio Grande do Sul (RS) it is responsible for about 50% of the Brazilian production of rice, and the success of the production depends, generally, of the application of chemical substances. Many ...
Estudo de métodos empregando extração em fase sólida e análise por HPLC-DAD e GC-ECD para a determinação de resíduos de pesticidas em águas e da degradação a campo
(Universidade Federal de Santa Maria, 2007-02-26)
The culture of irrigated rice generates a great impact to the environment, both in the amount and the quality of waters. In this study, a methodology was developed and validated for the determination, in waters, of residues ...