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Determinação de elementos traço em solo por ICP-MS após volatilização empregando combustão iniciada por micro-ondas
(Universidade Federal de Santa Maria, 2011-03-22)
In this work the microwave-induced combustion (MIC) method was proposed for the decomposition of soil samples and subsequent determination of As, Bi, Cd, Hg, Pb and Se by inductively coupled plasma mass spectrometry (ICP-MS). ...
Reações de 2-alcóxi-5-trifluoracetil-3,4-diidro-2H-piranos com etilaminas substituídas e arilaminas
(Universidade Federal de Santa Maria, 2011-02-25)
This work presents the synthesis of two novel series of 1-alkyl(aryl)-2-amino-
5-trifluoroacetyl-1,2,3,4-tetrahydropyridine (6, 8), obtained from the reaction of 2-
alkoxy-5-trifluoroacetyl-3,4-dihydro-2H-pyrans (alkoxy = ...
Síntese de 1-aril-4-[(dimetilamino)metileno] pirrolidino-2,3,5-trionas utilizando irradiação de micro-ondas
(Universidade Federal de Santa Maria, 2011-02-24)
The synthesis of a series of 1-aryl-4-[(dimethylamino)methylene] pyrrolidine-
2,3,5-trione from the cyclocondensation reaction between b-enaminodiketone
[Cl3C(O)C(=CHNMe2)C(O)CO2Et] and aniline derivatives [R = Ph, 3-Me-C6H4, ...
Síntese de β-Calcogenoaminas quirais via abertura regiosseletiva de Aziridinas em Líquidos Iônicos.
(Universidade Federal de Santa Maria, 2011-07-29)
The present work report the synthesis of β-chalcogen amino compounds derived from L-aminoacids. The desired products were obtained in a short reaction time, with high yields using a simple and environmentally friendly ...
Nh-pirazóis e isoxazóis: síntese mecanicamente ativada por grinding
(Universidade Federal de Santa Maria, 2010-07-30)
The synthesis of twelve NH-pyrazoles from the cyclocondensation reaction of β-dimethylaminovinylketones ([R1C(O)C(R2)=CHN(Me)2], where R1 = Me, C6H5, 3-
MeO-C6H4, 4-Me-C6H4, 4-MeO-C6H4, 4-F-C6H4, 4-Cl-C6H4, 4-Br-C6H4, ...
Síntese de 1,1-dimetiletil-1h-pirazóis em líquidos iônicos
(Universidade Federal de Santa Maria, 2010-07-08)
This work describes the synthesis of a series of pyrazoles from enaminoketones (RC(O)CH=CHNMe2 where R = hexyl, dimethoxymethyl, Ph, 4-Me-C6H4 4-F-C6H4, 4-Cl-C6H4, 4-Br-C6H4, 4-O2N-C6H4, thien-2-yl, fur-2-yl, pyrrol-2-yl ...
Produção de ácido levulínico por meio de hidrólise ácida da casca de arroz
(Universidade Federal de Santa Maria, 2010-02-08)
The beginning of the 21st century has been characterized by a great interest about the use of renewable raw materials for the production of industrial feedstocks and technological products. This trend is followed by the ...
Influência da formação de hidroxialuminosilicatos na biodisponibilidade do alumínio
(Universidade Federal de Santa Maria, 2010-02-04)
Solutions for parenteral nutrition may be contaminated by aluminum and silicate due to their storage in containers made of glass and due to the sterilization process (autoclave), which promotes the lixiviation of these ...
Síntese e Análise Estrutural de Complexos de Urânio (VI) e Tório (IV) com Ligantes Relacionados a N,N -bis-piridoxilidenoimina
(Universidade Federal de Santa Maria, 2010-07-16)
This work presents a study related to the synthesis and structural analysis of complexes of uranium (IV) and thorium (IV) with ligands related to N,N -bispiridoxilideneimine. Pyridoxine chlorhydrate and aliphatic and ...
Estudo fotoquímico da ação anti-radicalar de compostos polifenólicos empregando espectrofotometria e HPLC-UV
(Universidade Federal de Santa Maria, 2010-02-22)
The interest in antioxidants has increased considerably in recent years as molecules that reduce lipid peroxidation may minimize or inhibit the oxidative damage caused to DNA, proteins and carbohydrates. Flavonoids, a group ...