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Comparação entre os métodos de extração quechers e miniluke modificados na extração de resíduos de pesticidas piretróides em tomate empregando GC×GC-μECD
(Universidade Federal de Santa Maria, 2009-08-29)
In this study, two methods frequently used in the extraction of residues of pesticides in fruits and vegetables, the QuEChERS method and the mini-Luke
method, were compared in order to optimize and validate these methods ...
Desenvolvimento de equipamento de eletroforese capilar com detecção por condutividade sem contato para a separação de íons inorgânicos
(Universidade Federal de Santa Maria, 2009-03-16)
This work describes the development and evaluation of a home-made capillary electrophoresis (CE) system based on the capacitively coupled contactless conductivity
detection (C4D) for the application in capillary ...
Desenvolvimento de métodos eletroforéticos e cromatográficos para a determinação de benzodiazepínicos como adulterantes em formulações fitoterápicas para emagrecimento
(Universidade Federal de Santa Maria, 2009-07-03)
The adulteration of phytotherapic formulations has been increasing considerably in the recent years in several countries, by the fact that there is not an
established efficient monitoring for the control of the manipulation ...
Síntese, caracterização e cristaloquímica de complexos da cobre(I) e mercúrio(II) com ligantes triazenidos
(Universidade Federal de Santa Maria, 2005-07-20)
The reaction between mercury(II) acetate and 1-(3-nitrophenyl)-3-(2-fluorophenyl)triazene in a tetrahydrofuran/methanol mixture in the presence of
2,2′-bipiridylamine yields the complex [Hg(FC6H4NNNC6H4NO2)2] (1). (1) ...
Síntese, estruturas de triazeno 1-óxido e complexo de k+, e avaliação da atividade biológica de 1-metiltriazenos 1-óxido e 1,3-bis(aril)triazenos
(Universidade Federal de Santa Maria, 2005-12-19)
This work is associated with the crystal and molecular structure analysis of two free triazene 1-oxide molecules and a complex with K+ involving a p-carboxyfenil-substituted single protonated triazene 1-oxide ligand. ...
Reação de β-dimetilaminovinil cetonas com hidroxilamina: regioquímica de formação de 4,5-diidroisoxazóis e de isoxazóis
(Universidade Federal de Santa Maria, 2005-07-28)
The regiochemistry study of the formation of a series of aryl-, heteraryl- and haloalkyl-substituted isoxazoles from the reaction of β-dimethylaminovinyl ketones and
hydroxylamine is reported. The precursors β-imethylaminovinyl ...
Síntese de 2-(1h-pirazol-1-il)-5-(1h-pirazol-1-il-1-carbonil) piridinas
(Universidade Federal de Santa Maria, 2008-02-20)
This work describes the synthesis of a new series of 2-[3-alkyl(aryl/heteroaryl)-5-trihalomethyl-5-hydroxy-4,5-dihydro-1H-pyrazol-1-il]-5-[3-alkyl(aryl/heteroaryl)-5-trihalomethyl-5-hydroxy-4,5-dihydro-1H-pyrazol-1-il-1- ...
Avaliação de arranjos supramoleculares de complexos triazenidos de mercúrio (II) e cobre(II)
(Universidade Federal de Santa Maria, 2007-10-10)
The reaction between deprotonated 1,3-Bis(3-acetylphenyl)triazene and Hg(CH3COO)2 in methanol, yields [Hg(RNNNR)(Py)] (R=3-CH3C(O)C6H4) (1), a triazenide dimeric mononuclear complex of mercury(II). The crystal structure ...
Síntese de 5-hidróxi-3-(1,1-dimetoxietan-2-il)-5-trifluormetil-2-pirazolinas e 3-(1,1-difluoretan-2-il)-1H-pirazóis análogos
(Universidade Federal de Santa Maria, 2008-02-01)
This work describes, at first, the synthesis of 4,6,6-trimethoxy-1,1,1-trifluorohex-3-en-2-one by the acylation reaction of 1,1,3,3-tetramethoxybutane, in 65% yields.
Afterwards, the synthesis of a new series of ...
Estudo da interação do alumínio com o ácido glucônico
(Universidade Federal de Santa Maria, 2005-08-19)
Parenteral solutions are used for patients with complexes diseases, for pre-term infants and surgical patients. The administration of solutions contaminated by aluminium for a long period of time can lead to severe ...