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Determinação de halogênios em carvão, coque petroquímico e alimentos após combustão iniciada por microondas
(Universidade Federal de Santa Maria, 2008-03-14)
The microwave-induced combustion (MIC) method was applied for coal and petroleum coke digestion for further determination of bromine, chlorine, fluorine and iodine
by ion chromatography (IC). Samples (up to 500 mg) were ...
Síntese de 1h-pirazóis usando irradiação de ultra-som e de 2-pirrolonas derivadas do ácido levulínico
(Universidade Federal de Santa Maria, 2008-11-25)
This work describes the synthesis of 4,5-dihydropirazoles through a sonochemical methodology, from the reaction of cyclocondensation of 1,3-diaryl-2-propen-1-ones with aminoguanidine hydrochloride and thiosemicarbazide. ...
Determinação simultânea de sulfametoxazol e trimetoprima em formulações farmacêuticas por ATR-FTIR e DRIFTS empregando calibração multivariada
(Universidade Federal de Santa Maria, 2008-03-10)
A partial least-squares calibration (PLS) procedure in combination with infrared spectroscopy has been developed for simultaneous determination of sulphamethoxazole (SMZ) and trimethoprim (TMP) in raw material powder ...
Síntese de ciclodextrinas pentafluorpropioniladas e suas aplicações como fases estacionárias quirais em cromatografia gasosa enantiosseletiva
(Universidade Federal de Santa Maria, 2008-12-05)
Three new α, β- and γ-cyclodextrins derivatives were synthesized: hexakis-(2,6-di-O-pentyl)-α-cyclodextrin, heptakis-(2,6-di-O-pentyl)-β-cyclodextrin and octakis-(2,6-di-O-pentyl)-γ-cyclodextrin. The structures were ...
Biorremediação de herbicidas em água do cultivo de arroz irrigado visando minimizar o impacto ambiental
(Universidade Federal de Santa Maria, 2008-12-22)
Irrigated rice production depends on the pesticides application, among other factors. Herbicides could be highlighted as the most used ones, which may be transported into natural water sources, generating pollution and ...
Determinação de espécies de antimônio em antimoniato de meglumina
(Universidade Federal de Santa Maria, 2008-08-04)
In this study different methods for speciation of Sb(III) and Sb(V) in meglumine
antimoniate (NMG) were evaluated. Liquid chromatography (LC) combined or not
with hydride generation (HG) was investigated for separation of ...
Quantificação do alumínio administrado e excretado em recém-nascidos pré-termo em uma unidade de terapia intensiva neonatal
(Universidade Federal de Santa Maria, 2008-10-15)
Al is a ubiquitous element on the earth crust and is considered a non-essential
element for humans since it is not involved in any biochemical process. Aluminum
may act as a toxic species when it is introduced directly ...
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 ...
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, ...