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Avaliação dos efeitos da radiação micro-ondas na atividade heterogênea e estabilidade química de nanopartículas de magnetita em processos oxidativos avançados
(Universidade Federal de Santa Maria, 2020-02-20)
In this research, for the first time, is reported the role of microwave (MW) radiation into
the heterogeneous activation of nano–Fe3O4. Since magnetite has been extensively used as
catalyst in advanced oxidative processes ...
Síntese e reatividade de N-alquinilindóis: preparação de N-alquinilindóis-2-substituídos e calcogenazolo[3,2-a]indóis
(Universidade Federal de Santa Maria, 2020-02-21)
This work reports the preparation of 2-Substituted-N-alkynylindoles 3 (18 examples) with yields that varied from 30 to 90%, via the metalation reaction of N-alkynylindoles 1 followed by the capture of 2-indolyl lithium ...
Determinação de cloro, enxofre, cobalto, níquel e vanádio em petróleos após combustão iniciada por micro-ondas em frascos descartáveis
(Universidade Federal de Santa Maria, 2020-11-26)
In this work, sample preparation methods based on microwave-induced combustion in disposable vessel (MIC-DV) for the determination of Cl, S by ICP OES, Co, Ni and V by ICP-MS in petroleum were developed. The main operational ...
Síntese de 1,2,3-triazóis-1,4-dissubstituídos contendo organocalcogênios derivados de 4-(azidometil)-2-fenil-1,3-calcogenazóis via reação de cicloadição 1,3-dipolar
(Universidade Federal de Santa Maria, 2020-10-20)
In this present work, an unprecedented series of 4-((4-((arylchalcogen)methyl)-1H-1,2,3-triazol-1-yl)
methyl)-2-phenylchalcogenazole 20 and 21 was synthesized with interest in the potential biological,
because to the ...
Bis(alquilaril, aril)piridina-2,6-dicarboxiamidas: estrutura molecular, supramolecular e polimorfismo
(Universidade Federal de Santa Maria, 2020-03-02)
This work presents the study of intermolecular interactions and the molecular association process of bis (alkylaryl, aryl) pyridine-2,6-dicarboxamides, where the alkylaryl substitutes are (1) 2,2-diphenylethyl, (2) phenylethyl ...
Síntese, caracterização e avaliação da atividade antimicobacteriana de compostos de coordenação derivados do disseleneto de 2,2’-bis(3-aminopiridina)
(Universidade Federal de Santa Maria, 2020-02-28)
This work describes the synthesis and characterization of seven new
coordination compounds derived from 2,2'-bis-(3-aminopyridine) diselenide
interacting with metal ions of diferent degree of hardness. Among the ...
Determinação de resíduos de glifosato e ácido aminometilfosfônico em água empregando derivatização com FMOC-Cl e LC-MS/MS
(Universidade Federal de Santa Maria, 2020-02-21)
A simple and easy method based on the derivatization for determinação of glyphosate and aminomethylphosphonic acid (AMPA) in water and subsequent determination by liquid chromatography coupled with mass spectrometry in ...
Síntese, caracterização e agregação de líquidos iônicos mono- e dicatiônicos derivados de aminoácidos
(Universidade Federal de Santa Maria, 2020-02-20)
This study presents the synthesis and characterization of mono and dicationic ionic liquids (ILs), with anions derived from amino acids (Arginine, Glycine, Lysine and Serine). The influence of the molecular structure of ...
Determinação multirresíduo de agrotóxicos em água empregando SPE e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2020-03-02)
The presence of organic pollutants in water resources is a major concern. The most commonly reported of these pollutants are generated by domestic, agricultural and industrial activities. Organic pollutants produce a wide ...
Mosaicos de cargas elétricas e grandes gradientes de potencial em superfícies dielétricas formados pela evaporação de líquidos
(Universidade Federal de Santa Maria, 2020-03-06)
This work presents a study on the charge transfer of the automatic micropipette and the glass microsyringe with the grounded and ungrounded metallic part when dripping with different liquids and also when applying different ...