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Itens para a visualização no momento 201-210 of 278
Síntese, análise cristalográfica e atividade biológica de complexos com ligantes triazenidos com fragmentos orto-halofenila e para-sulfonamidafenila
(Universidade Federal de Santa Maria, 2013-03-08)
This study shows the triazenes ligands and complexes Pd(II), K+ and Au(I) obtained from reactions of the ligands with fragments para-sulfonamidephenyl, comprising triazene ligand 1,3-bis (4 - sulfonamidephenyl) (1) and the ...
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 ...
Estudo de parâmetros reacionais em moinho de bolas na síntese de aril(heteroaril)-1h-pirazóis
(Universidade Federal de Santa Maria, 2012-08-08)
This paper describes a study of reaction parameters in a ball mill in the synthesis of
1H-pyrazole acid catalyzed. The studied parameters were: amount of reactants,
frequency, reaction time, amount of catalyst, number ...
Determinação de contaminates inorgânicos em nanotubos de carbono por ICP-OES e ICP-MS
(Universidade Federal de Santa Maria, 2016-03-05)
In this work, microwave-assisted wet digestion using the single reaction chamber (MAWD-SRC) and microwave-induced combustion (MIC) methods were investigated for the decomposition of carbon nanotubes (CNTs) and further ...
Síntese e atividades antimicrobiana/antioxidante de 1-(pirazolin-1-il)-2-[(aril/heteroaril)metileno] carboidrazidas trifluormetil substituídas
(Universidade Federal de Santa Maria, 2010-09-16)
This work initially describes the regioselective synthesis of a series of 3-alkyl(aryl/heteroaryl)-5-trifluoromethyl-5-hydroxy-4,5-dihydro-1H-pyrazole-1-carbohydrazides (2) from the monocyclocondensation reaction of ...
Novos Espirocromenil-Trifluoretanonas a partir de Reações de Trifluoracetilação de Adutos de Kabbe e seus Espiro[diidrocromeno-cicloalcan]pirazóis e Isoxazóis Derivados
(Universidade Federal de Santa Maria, 2013-12-03)
This work describes firstly an efficient and regioselective method for the synthesis of a new series of 2,2,2-trifluoro-1-[4-methoxy-spiro(2H-chromen-2,1 -cycloalkan)-3-yl]ethanones from the Kabbe adducts (spiro[chroman-2,1 ...
Determinação sequencial de cromo, tálio, cádmio,chumbo, cobre e antimônio em concentrado polieletrolítico para hemodiálise por voltametria de redissolução através de um gradiente de pH
(Universidade Federal de Santa Maria, 2010-02-05)
The sequential voltammetric determination of chromium, thallium, cadmium, lead, copper and antimony, present as contaminants in dialysate concentrates (CPHD), is
presented herein. These concentrates contain a very high ...
Determinação voltamétrica de contaminantes metálicos (Hg, Ag, Zn, Cd, Pb e Tl) em concentrado polieletrolítico utilizando eletrodos sólidos
(Universidade Federal de Santa Maria, 2012-03-08)
This work describes the voltammetric determination of Hg, Ag, Zn, Cd, Pb and Tl
using solid electrodes as working electrodes in samples of dialysate concentrates
(DCs). These contain a very high ionic strengt (~ 4.1 mol ...