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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 ...
5-Hidróxi-4,5-Diidro-1h-1-(2-hidroxibenzoil)pirazóis: planejamento, síntese e analgesia
(Universidade Federal de Santa Maria, 2007-02-23)
An efficient method to obtain six 4-alkoxy-2-oxo-but-3-enoic acid ethyl esters [EtO2CC(O)C(R2)=C(R1)OR, where R1/R2/R = Me/H/Me (2a), Ph/H/Me (2b), 4-MeC6H4/H/Me (2c), 4-BrC6H4/H/Me (2d), 4-FC6H4/H/Me (2e), H/Me/Et (2f)] ...
Obtenção quimiosseletiva de trialometil-β-dicetonas via reações de acilação de acetais
(Universidade Federal de Santa Maria, 2009-02-27)
This work presents an Acylation Method of Acetals applied to the quimioseletive obtention of trifluormethyl-β-diketones, incluing acetals derived from not symmetrical ketones and functionalized substituents. Five known ...
5-trialometil-4,5-diidro-1h-1-(carbonilpiridil)pirazóis: síntese e atividade biológica frente ao Mycobacterium tuberculosis
(Universidade Federal de Santa Maria, 2008-08-06)
This work describes the synthesis of series of 5-hydroxy-3-[alkyl(aryl/heteroaryl)]-5-trifluoro[chloro]methyl-4,5-dihydro-1H-1(carbonylpyridyl)pyrazoles, obtained from the
reactions of 1,1,1-trihalo-4-[alkyl(aryl/hetero ...
Validação de procedimento analítico empregando SPE e GC-ECD para determinação de pesticidas organoclorados em água e avaliação da permeabilidade destes nos dialisadores utilizados em hemodiálise
(Universidade Federal de Santa Maria, 2004-08-27)
The dialysis of the blood, within which the most applied modality is the haemodialysis, is a method thoroughly used for the treatment of the renal inadequacy. With this treatment, toxic substances accumulated in the patient´s ...
Decomposição de coque, resíduo de vácuo e petróleo extrapesado por piroidrólise para a determinação de cloro
(Universidade Federal de Santa Maria, 2007-10-26)
In this work, a method for chlorine determination in petroleum coke, vacuum and atmospheric residues and heavy petroleum was developed. The pyrohydrolysis sample decomposition method was used, which consists of sample ...
Síntese regioespecífica de 1H-pirazolilquinolinas trifluormetil substituídas
(Universidade Federal de Santa Maria, 2004-07-27)
This work describes the synthesis of a serie of 4-(3-alkyl(aryl)-5-trifluoromethyl-1Hpyrazol-
1-yl)-7-chloroquinolines (6), from the cyclondensation reactions of 1,1,1-trifluoro-
4-methoxy-3-buten-2-ones (4) and ...
Desenvolvimento e validação de procedimento analítico para a determinação de compostos organohalogenados em fertilizante orgânico empregando GC-ECD
(Universidade Federal de Santa Maria, 2004-02-17)
The growing worldwide concern regarding the life quality, especially
regarding the preservation and appropriate use of natural resources and quality of
food, has reflected on the productive systems. Inside this new ...
Dimerização quimioseletiva de vinilarenos catalisada por tribrometo de índio
(Universidade Federal de Santa Maria, 2004-02-27)
This work describes our first results on the use of indium(III) salts as catalysts of oligo-polimerization processes of olefins. The first class of olefins which were tested was vinylarenes under the catalytic influence ...