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Estudo dos metabólitos secundários de Condalia buxifolia e Scutia buxifolia e suas atividades antimicrobianas
(Universidade Federal de Santa Maria, 2005-11-30)
The present work describes the study of the secondary metabolites of two species that belong to the Rhamnaceae family: Condalia buxifolia and Scutia buxifolia, and the study of the ratio structure/activity of seven ...
Síntese de 1-[aril(heteroaril)]-5-(3,3,3-trifluor-2-oxopropilideno) pirrolidin-2-onas
(Universidade Federal de Santa Maria, 2005-10-31)
The synthesis of a series of ten 1-[aryl(heteroaryl)]-5-(3,3,3-trifluoro-2-oxopropilideno) pyrrolidin-2-ones by intramolecular cyclocondensation reaction of methyl 7,7,7-trifluoro-4-[aryl(heteroaryl)amino]-6-oxo-4-heptanoates ...
Síntese de 2-[3h-pirazol-2-il]trifluormetilpirimidinas Alquil, aril e heteroaril substituidas
(Universidade Federal de Santa Maria, 2004-07-14)
This work describes a general methodology for the synthesis of a novel series of 4-alkyl, 4-aryl, heteroaryl-2-[5-methyl-4-(2-hidroxyethyl)-3-oxo-1,2-dihydro-3H-pyrazol-2-yl]-6(4)-trifluoromethylpyrimidines. The precursors ...
Síntese em fase sólida, caracterização e estudo conformacional da δ melantropina e da δ melantropina oxidada
(Universidade Federal de Santa Maria, 2005-03-12)
The δ melanotropin is a peptide with sequence H-Ser-Met-Glu-Val-Arg-Gli-Trp-OH. The synthesis of this peptide was carried out by the methodology in solid phase, being the sequence synthesized on a polymeric support by means ...
Determinação de pesticidas e compostos relacionados em água de superfície e efluente industrial empregando extração em fase sólida e cromatografia gasosa acoplada à espectrometria de massas
(Universidade Federal de Santa Maria, 2004-08-20)
To assist the growing nutritious demand, caused by the great population increase, the use of pesticides has been intensified in the agriculture. Such products improve the agricultural productivity and could reduce the food ...
Decomposição de carbamazepina em sistema fechado por combustão iniciada por microondas para posterior determinação de Cd, Cu e Pb
(Universidade Federal de Santa Maria, 2005-03-02)
In this work, a decomposition procedure was proposed based on sample combustion assisted by microwave radiation. Samples of carbamazepine, a medicine used in the treatment of the epilepsy were used. The decomposition of ...
Influência de modificadores orgânicos na determinação de chumbo em amostras de suplementos de cálcio por GF AAS
(Universidade Federal de Santa Maria, 2004-03-04)
The main goal of this study was to evaluate the effect of organic modifiers in the determination of lead in calcium supplement samples by graphite furnace atomic absorption spectrometry (GF AAS). Samples of refined calcium ...
Estudo da influência de modificadores químicos para a determinação de chumbo por GF AAS na presença de sulfatos
(Universidade Federal de Santa Maria, 2005-03-03)
Lead determination by graphite furnace atomic absorption spectrometry may be affected by some interferences. Several authors have reported that lead determination may be affected in the presence of some salts (carbonates ...
Determinação de cádmio e manganês com pré-concentração por FI-FAAS e aplicação em aditivo alimentar à base de fosfatos
(Universidade Federal de Santa Maria, 2005-09-02)
Cadmium is a toxic element even at low concentration and is no essential for human metabolism, while Mn is essential and no toxic at low concentration. For that reason, it is important to have sensitive and accurate methods ...
Síntese de 4-(fur-2-il)- e 4-(tien-2-il)-pirimidinas a partir de β-Alcoxivinil trifluormetil cetonas
(Universidade Federal de Santa Maria, 2005-08-01)
The cyclocondensation of the 1,1,1-trifluoro-4-methoxy-4-(2-heteroaryl)-3-buten-2-ones (heteroaryl = furyl and thienyl) with urea and amidines (acetamidine, benzamidine, guanidine, 1H-pyrazole-1-carboxamidine and ...