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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 ...
Avaliação das emissões de hidrocarbonetos policíclicos aromáticos e seus derivados a partir de matrizes asfálticas
(Universidade Federal de Santa Maria, 2022-10-24)
Asphalt is a product of petroleum, basically consisting of hydrocarbons, which may contain
heteroatoms such as sulfur, oxygen and nitrogen in their structure. In the application of asphalt
on a road bed, it is subjected ...
Síntese de derivados vinílicos e enínicos de fósforo e aplicação sintética de dissulfetos imidazolidínicos quirais em reações assimétricas
(Universidade Federal de Santa Maria, 2002-07-26)
In this work, we developed a method to prepare β-alkynylvinylphosphonates 3 via a
palladium-catalyzed cross-coupling reaction of β-n-butyltellurovinylphosphonates 2 with
terminal alkynes. The compounds 2 were prepared ...
Síntese, estrutura e propriedades de complexos de Cu(II) e Tl(I) com ligantes triazenos monocatenados
(Universidade Federal de Santa Maria, 2003-12-18)
In this work we synthesized and determinate the crystalline/ molecular structure of
three Cu(II) complexes and one Tl(I) complex, all of them showing monocatenated triazenide ligands
previously deprotonated. We present ...
Análise fitoquímica de Luehea divaricata (Martius) e Symplocos uniflora (Benth) - e suas potenciais atividades biológicas
(Universidade Federal de Santa Maria, 2022-08-28)
Luehea divaricata (Malvaceae) and Symplocos uniflora (Symplocaceae), better known as
“açoita-cavalo” and “sete sangrias”, respectively, are native Brazilian species from pampa
biome with few reports in the literature. ...
Método multirresíduo rápido para a determinação de agrotóxicos em abobrinha empregando QuEChERS modificado e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2022-10-14)
In the last decades, the use of pesticides in Brazil and in the world has increased substantially, mainly due to the demand for food. Brazil stands out in the international scenario, mainly in the production and cultivation ...
Procedimentos para a determinação de cádmio para análise de amostras sólidas por espectrometria de absorção atômica com chama (SSA-FAAS)
(Universidade Federal de Santa Maria, 2004-02-12)
The purpose of this study was to develop a system for solid sampling
analysis by flame atomic absorption spectrometry (SSA-FAAS), which would allow
the use of higher sample mass when compared to other devices reported ...
Reações de 3-trialoacetil-4,5-diidrofuranos e 5-trialoacetil-3,4-diidro-2H-piranos com aminas e álcoois
(Universidade Federal de Santa Maria, 2003-03-21)
This work presents the synthesis of α-alkylaminomethylene-γ-
lactones 8 (one pot reaction) and α-alkylaminomethylene-δ-lactones 9 (two steps
reaction), from the reaction of 3-trichloroacetyl-4,5-dihydrofuran (3) and ...
Aplicação de carbocátions calcogênio estabilizados na síntese de 1,2,3,4-tetraidroisoquinolinas funcionalizadas
(Universidade Federal de Santa Maria, 2003-04-15)
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