Buscar
Itens para a visualização no momento 81-90 of 905
Arranjos supramoleculares de triazenidos complexos de Ag(I) através de ligações de hidrogênio
(Universidade Federal de Santa Maria, 2008-08-14)
In this work we synthesized and determinates the crystaline/molecular structure of thre Ag(I) complexes, all of them use monocatenated triazenide ligands previously desprotonated. The complex [Ag(C6H4FNNNC6H4NO2)(C5H5N)]2 ...
Desenvolvimento e validação de método multirresíduo, empregando GC-ECD E GC-MS, para a investigação de pesticidas em morango, maçã e uva
(Universidade Federal de Santa Maria, 2005-03-03)
Pesticides use is still the main strategy used in the field for the combat and the prevention of agricultural plagues, guaranteeing enough food and of quality for the population. In the culture of fruits, especially in ...
Avaliação da associação molecular de complexos metálicos com ligante triazenido 1-óxido
(Universidade Federal de Santa Maria, 2008-06-16)
In this dissertation were synthetized six compounds, of the which one is free ligand 1- phenyl-3-(4-nitrophenyl) triazene 1-oxide (1) and five are triazenido complexes of [Ni(O2NC6H4NNN(O)C6H5)2(C5H5N)2] (2), [Zn(O2NC6H4 ...
Reações de ciclocondensação de cianoacetoidrazida com enonas halometil-substituídas
(Universidade Federal de Santa Maria, 2008-02-22)
The synthesis of thirteen 3-(R1), 4-(R2) and 5-(R3)-substituted 1-cyanoacetyl-5-hydroxy-4,5-dihydro-1H-pyrazoles from the cyclocondensation reaction of 4-alkoxy-3-alken-2-ones [R3C(O)C(R2)=C(R1)(OR), where R3 = CF3,
CCl3, ...
Síntese de trifluormetil-cicloalca[d]-2(1h)-pirimidinonas e tiopirimidinonas
(Universidade Federal de Santa Maria, 2004-07-20)
This work describes the synthesis and identification of a serie of 4-trifluoromethylcycloalca[d]-2-(1H)-(thio)pyrimidinones, from the cyclocondensation reactions of 2-trifluoroacetylmethoxycycloalkenes with urea and ...
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. ...