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Determinação do grau API e teor de enxofre e nitrogênio em petróleo usando ATR-FTIR e métodos quimiométricos
(Universidade Federal de Santa Maria, 2019-11-25)
Parameters such as API gravity and sulfur and nitrogen concentrations are important to determine crude oil quality. API, S and N grade determinations were evaluated by ASTM D-7042, ASTM D-5453 and ASTM D-4629 methods, ...
Síntese, análise estrutural e avaliação da atividade inibitória da enzima urease por oxidovanádio (IV) e dioxidovanádio (V) complexos derivados de hidrazidas aromáticas
(Universidade Federal de Santa Maria, 2019-07-05)
This work presents the synthesis and characterization of vanadium complexes and the potential of these compounds to inhibit the enzyme urease. The complexes were obtained from the aldol condensation between substituted ...
Síntese e caracterização de [2]rotaxano: estudo conformacional em solução
(Universidade Federal de Santa Maria, 2019-11-25)
Rotaxanes molecules became an important model for studying supramolecular chemistry by theirs unique motions and characteristics. In this context, this work was based in the synthesis of three molecules. One secondary ...
Método gravimétrico de Payzant em amostras de cimento asfáltico: uma investigação analítica para reduzir o consumo de reagentes e a geração de resíduos
(Universidade Federal de Santa Maria, 2019-11-25)
This work presents alternative methodologies to fractionation of petroleum asphalt cement (CAP) in sulfur species (saturated/aromatic compounds, thiophenic compounds and sulfide compounds) proposed by Payzant (1989). The ...
Síntese de 3-(trifluormetil)-4H-pirido[1,2-a]pirimidin-4-onas 2-substituídas via reação de trifluormetilação usando MFSDA
(Universidade Federal de Santa Maria, 2019-11-25)
The present work aims to perform a synthetic feasibility study following a satisfactory procedure to obtain a novel compound denominated 2-phenyl-3- (trifluoromethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (4b) by using MFSDA as ...
Interação entre líquidos iônicos e óxidos de titânio e silício utilizando ressonância plasmônica de superfície
(Universidade Federal de Santa Maria, 2019-11-25)
This work presents the interactions between ionic-liquid-based active pharmaceutical ingredients (IL-APIs) bupivacaine ibuprofenate [BUP][IBU], 1,8-bis(3-methylimidazolium-1-yl) octane ibuprofenate [BisOct(MIM)2][2IBU], ...
Avaliação fitoquímica e da atividade antioxidante de Equisetum giganteum e Tagetes minuta
(Universidade Federal de Santa Maria, 2019-11-25)
The essential oil of Tagetes minuta native from Southern Brazil was obtained through hydrodistillation and analyzed for its chemical composition and antioxidant potential. Along with the essential oil, an aqueous extract ...