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Novos complexos de prata(I) com fenil e difenilfosfinato
(Universidade Federal de Santa Maria, 2013-06-21)
New compounds phenylphosphinates and diphenylphosphinates silver (I) were synthe-sized and characterized with two coordination polymers and five molecular coordination complexes. The phosphinates are in oxygen-metal strong ...
Determinação de hidrocarbonetos policíclicos aromáticos e seus derivados utilizando cromatografia líquida acoplada à espectrometria de massas
(Universidade Federal de Santa Maria, 2013-08-06)
In this study analytical methods using liquid chromatography coupled to mass
spectrometry with atmospheric pressure chemical ionization (LC-APCI-MS) were
developed for the determination of polycyclic aromatic hydrocarbons ...
Compostos sulfurados em asfaltos: influência do processo de envelhecimento na composição das frações maltênicas e asfaltênicas
(Universidade Federal de Santa Maria, 2013-08-05)
The behavior of sulfur compounds in asphalt cements can be studied in a more comprehensive way through the separation of maltenes and asphaltenes and their respective fractions. Thus, the ASTM D4124 method was applied for ...
Determinação de enxofre em amostras de grafite flexível por ICP OES utilizando piroidrólise como preparo de amostra
(Universidade Federal de Santa Maria, 2013-07-16)
The flexible graphite is a material produced from the intercalation, exfoliation
and compression of graphite. Due to its low porosity, high chemical and thermal
resistance, the flexible graphite is used in many different ...
Síntese de 1,2,4-oxadiazóis 3,5-dissubstituídos derivados de Laminoácidos e arilamidoximas sob irradiação de micro-ondas
(Universidade Federal de Santa Maria, 2013-02-28)
Here we report the synthesis and characterization of 3,5-disubstituted 1,2,4-oxadiazole 3 derivatives of N-protected L-amino acid 1 and arilamidoximas 2, and the reaction was performed in a microwave reactor, using water ...
Bi-heterociclos a partir do Ácido Levulínico: Síntese de 5-[(5-(trifluormetil)-5-hidroxi-(3-substituido)-4,5-diidro-1H-pirazol-1-il)-1-propan-1-ona-3-il]-2-metil-7-trifluormetil)pirazolo[1,5-a]pirimidinas
(Universidade Federal de Santa Maria, 2013-03-04)
An efficient method to obtain 2-methyl-5-(methylpropanoate-3-yl)-7-trifluoromethylpyrazolo[1,5-a]pyrimidine 2 from the reaction of compound methyl 7,7,7-trifluoro-4-methoxy-6-oxo-heptenoate with 3-amino-5-methyl-1H-pyrazol. ...
Decomposição assistida por radiação micro-ondas e ultravioleta para posterior determinação de níquel, vanádio e enxofre em coque de petróleo
(Universidade Federal de Santa Maria, 2013-07-12)
The presence of Ni, V and S in petroleum coke is undesirable because can cause poisoning in catalysts used in refining processes and problems during the coke burning such as SOX emissions, abrasion and fouling of the ...
Estudo computacional da difusão de água em nanotubos de carbono induzida por gradiente de pressão
(Universidade Federal de Santa Maria, 2013-02-08)
In this work we present a computational study of the properties of water transport
across membranes formed of carbon nanotubes (CNT) armchair with different diameters,
when subjected to pressure gradients 80-400 MPa. This ...
Análise da implantação do projeto SPED em uma empresa
(Universidade Federal de Santa Maria, 2013-12-14)
The technology is present in everyone's life. Today, any professional field resists
transformation that occurs, the information age. Given this situation, it was impossible
for accounting as science should be oblivious ...
Prática pedagógica desenvolvida em uma turma de quinto ano do ensino fundamental na perspectiva da matriz de referência de matemática
(Universidade Federal de Santa Maria, 2013-12-05)
This study describes a pedagogical practice made with students from the fifth year in primary school related to mathematical investigation. It has been proposed due to some descriptors’ approaches presented in the group ...