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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 ...
Produção biotecnológica de ácido itacônico a partir da casca de arroz
(Universidade Federal de Santa Maria, 2014-03-24)
Rice Husks (RH) can be regarded as an abundant lignocellulosic raw material in the Brazilian southern(se for somente regiões do RS, SC e PR fica South region, senão, tá ok) region, renewable and practically without economic ...
Determinação de poluentes orgânicos persistentes (pops) em leite materno: desenvolvimento e aplicação de método analítico empregando GC-NCI-MS
(Universidade Federal de Santa Maria, 2014-03-12)
Persistent Organic Pollutants (POPs) receive this designation because of the time that remain unchanged in the environment. From the 1960s there was already evidence of the presence of these compounds in sediment, breast ...
Determinação de fungicidas em sucos de laranja empregando método de extração mini-luke modificado e UPLC-MS/MS
(Universidade Federal de Santa Maria, 2014-03-26)
Orange juice is a relevant contribution to the Brazilian economy, as long as five glasses of orange juice consumed in the world, three are produced in Brazil. For the purpose of increase the production of fruits and, ...
Alcaloides ciclopeptídicos de Scutia buxifolia e suas atividades antimicrobianas
(Universidade Federal de Santa Maria, 2014-04-29)
The phytochemical investigation of the stem bark of the specie Scutia buxifolia (Rhamnaceae) led to the isolation of four cyclopeptide alkaloids: scutianine C (14) and three diastereoisomer of scutianine H (19), isolated ...
Avaliação de métodos de decomposição de chocolate e determinação de metais por ICP-OES e ICP-MS
(Universidade Federal de Santa Maria, 2014-02-13)
In this work, was evaluated the main methods of sample preparation reported in the literature for decomposition of chocolate and, in addition, was proposed the decomposition by microwave induced combustion (MIC) for further ...
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. ...