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Determinação de resíduos de agrotóxicos em água empregando microextração líquido-líquido dispersiva (DLLME) e cromatografia líquida de alta eficiência com detecção por arranjo de diodos (HPLC-DAD)
(Universidade Federal de Santa Maria, 2017-07-10)
Water is a natural resource of extreme importance, humans, animals and plants depends directly on it to survive. The state of RS stands out in national scenario as a big producer of many crops, which demand huge amounts ...
Desenvolvimento de método simples e rápido para determinação multiclasse de resíduos de medicamentos veterinários em rim, fígado e músculo bovino por UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2017-03-10)
In food security area, the application of good agricultural practices is a growing concern for public health in the Brazilian domestic market and for the competitiveness countries in the external market. To ensure safety ...
Máquinas moleculares sintéticas: tetraalquil[2]rotaxanos como modelo no estudo de interações intramoleculares e intermoleculares
(Universidade Federal de Santa Maria, 2017-07-26)
This work presents the study of intramolecular and intermolecular interactions in tetraalkylsuccinamide[2]rotaxanes. These compounds have two submolecular components interlocked being obtained through a supramolecular ...
Determinação de hidrocarbonetos policíclicos aromáticos, níquel e vanádio em frações ácidas, básicas e neutras de asfaltos virgens e envelhecidos
(Universidade Federal de Santa Maria, 2017-08-15)
Asphalt cement (AC) is a dark-colored binder material, consisting of a mixture of naturally occurring petroleum hydrocarbons or obtained from distillation, which contains small fractions of sulfur, nitrogen, oxygen and ...
Síntese e caracterização estrutural de novos compostos organocalcogenoxanos contendo ítrio(III)
(Universidade Federal de Santa Maria, 2017-07-26)
This work describes the synthesis and structural characterization of new organochalcogenoxanes polymer and clusters compounds containing yttrium(III) ion. The synthetized compounds have structure of unidimensional coordination ...
Estrutura supramolecular de cristais multicomponentes derivados do ácido salicílico e do ibuprofeno
(Universidade Federal de Santa Maria, 2017-03-17)
This work presents the study of multicomponent crystals formed by salicylic acid (AS) with 1,2-Phenylenediamine (FEN) and 3-Amino-1,2-4-1H-triazole (TRIA) as amines; and rac-ibuprofen (IBU) with 3-amino-5-methyl-1H-pyrazole ...
Síntese e caracterização de 1,3,4-oxadiazolil-1,2,4-oxadiazóis derivados de ácidos acrílicos 3-substituídos
(Universidade Federal de Santa Maria, 2017-02-24)
A series of 1,3,4-oxadiazolyl-1,2,4-oxadiazoles was synthesized through a one-pot condensation-cyclization reaction between 3-substituted acrylic acids and 5-aryl-1,2,4-oxadiazolyl-1,2,4-oxadiazoles, and were characterized ...
Autoassociação de amidas aromáticas: abordagem supramolecular e mecanismos de cristalização
(Universidade Federal de Santa Maria, 2017-07-21)
This work presents the use of N-phenylamides as models for the study of self-association and intermolecular interactions. Obtaining the crystal of N-phenyltrifluoroacetamide allowed its diffraction and inclusion in the ...
Síntese e estereoquímica de isoxazóis espiro-tetracíclicos trifluormetil substituídos
(Universidade Federal de Santa Maria, 2017-02-23)
The present dissertation initially describes methodologies for the synthesis of five 3-(trifluoromethyl)-3,3a-dihydrospiro[chromeno[4,3-c]isoxazole-4,1'-cycloalkan]-3-ols (7) in 65 – 84 % yields, where the spirocarbocyclic ...
Síntese e caracterização de complexos de rênio e tecnécio contendo ligantes arilcalcogenolatos (Se, Te)
(Universidade Federal de Santa Maria, 2017-12-06)
Rhenium and technetium coordination chemistry containing arylthiolate ligands are long known in the
literature. However, there is a limited understanding regarding the correlates containing heavier
chalcogens (Se and ...