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Itens para a visualização no momento 121-130 of 365
Determinação de elementos terras raras em petróleo e frações por amostragem direta e ICP-MS com vaporização eletrotérmica
(Universidade Federal de Santa Maria, 2017-07-29)
In this work, a method for the determination of rare earth elements (REE) present in low concentrations in crude oil, atmospheric distillation residue (RAT) and vacuum distillation residue (VR) using direct sampling and ...
Síntese, caracterização e avaliação antimicrobiana de novos heterociclos nitrogenados utilizando como precursores β-alcóxivinil trifluormetil cetonas de cadeias alquílicas longas
(Universidade Federal de Santa Maria, 2016-03-28)
This work describes the synthesis of 1H-pyrazole-1-thiocarboxamide, thiazol-1H-pyrazol-5-ol, 1H-pyrazol-1-yl-tiazoles and 1-(3-alkyl-5-trifluoromethyl-5-hydroxy-4,5-dihydro-1H-pyrazol-1-yl)-alquen-1-ones were prepared from ...
Desenvolvimento de método de preparo de amostras baseado no efeito Maxwell-Wagner e determinação de elementos terras raras por técnicas espectrométricas
(Universidade Federal de Santa Maria, 2017-06-03)
A new method for analytical applications based on Maxwell-Wagner effect with to use of microwave radiation in closed system is proposed. Considering the interaction of carbonaceous materials with an oscillating electromagnetic ...
Estabilidade térmica, oxidativa e suporte em sílica mesoporosa de líquidos iônicos derivados do ibuprofeno
(Universidade Federal de Santa Maria, 2018-08-14)
In this work, the thermal and oxidative stability of a series of ionic liquids (ILs) derived from active pharmaceutical ingredients (IL-APIs) with ibuprofen anion and cations: ranitidine [RAN][IBU], lidocaine [LID][IBU], ...
Síntese e avaliação biológica de 1,2,3-triazóis-1,4-dissubstituídos derivados de benzocalcogenoanilinas e 2-aril-4-(azidometil)-1,3-calcogenazóis
(Universidade Federal de Santa Maria, 2019-01-31)
In the present work two new series of 1,2,3-triazoles-1,4-disubstituted 20-33 obtained by the reaction of 1,3-dipolar cycloaddition, Click-type, were synthesized between the alkaloids derived from benzocalcogenoanilines ...
Análise fitoquímica das espécies Discaria americana e Scutia buxifolia
(Universidade Federal de Santa Maria, 2018-02-26)
This work had as a proposal to carry out a phytochemical study of the crude
extract of the bark of the roots of the species American Discaria Gilles and Hooker and
of the bark of the stem of the species Scutia buxifolia. ...
Desenvolvimento de método para determinação de resíduos de medicamentos veterinários em salmão por UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2019-02-27)
The aquaculture industry has been growing, developing and highlightning in the last few years. Many
countries and international organizations have invested in developing the activity according to available
resources. ...
Estudo de semi-sintéticos do ácido morônico e estudo de espectroscopia de difusão ordenada em produtos naturais
(Universidade Federal de Santa Maria, 2019-11-01)
Natural products play an important role in the discovery of new drugs, either by
isolating novel structures or obtaining semi-synthetic ones. However, due to the
complex nature, these studies are real challenges and ...
Determinação de resíduos de agrotóxicos em azeite de oliva e azeitonas empregando método QuEChERS e UHPLC-MS/MS
(Universidade Federal de Santa Maria, 2019-08-03)
Commonly used in the Mediterranean diet, olive oils and table olives have become more frequent in the everyday meals of the Brazilian consumer. Despite the small consumption per capita, the country is already the second ...
Síntese de compostos contendo núcleos de pirimidínicos derivados de β-enaminodicetonas
(Universidade Federal de Santa Maria, 2019-03-22)
In this work the reactivity of β-enaminodiketones [RC(O)C(=CHNMe2)C(O)R1], (wher R= C6H5, 4-Me-C6H4, 4-OMe-C6H4, 4-Cl-C6H4 4-NO2-C6H4, thien-2-yl and furan-2-yl) and R1 (CF3 and CO2Et), was studied with dinucleophiles such ...