Maestría en Química
Permanent URI for this collectionhttp://repositorio.uta.edu.ec/handle/123456789/32957
Browse
2 results
Search Results
Item Caracterización de plantas amazónicas con actividad antiofídica por análisis químico(Universidad Técnica de Ambato. Facultad de Ingeniería en Sistemas, Electrónica e Industrial. Maestría en Química, 2022) Moreno Ávila, Andrés Sebastián; Salazar Mogollón, GabrielaThe purpose of this research work was aimed to analyze and identify the metabolic compounds present in the species Urospatha sagittifolia (Rudge) Schott (formerly Dracontium), for which the plant species was collected in the Monte Alegre sector of the rural parish of Puerto Misahuallí, belonging to the canton Tena located in the province of Napo at an altitude of 460.6 m.a.s.l. The taxonomic identification of the sample was confirmed in the INABIO Herbarium in the city of Quito. The collected sample was dried, its size was minimized and it was taken to solid-liquid extraction and maceration for several days with different solvents such as: water, methanol, hexane and chloroform. After these processes, the pertinent chemical analyses were carried out, as well as phytochemical screening, which presented a coloration and a precipitate to give a positive result for each of the tests, respectively, following the appropriate methodology. Consequently, quantification was carried out in UV-vis spectrophotometry by means of the Folin-ciocalteu Reagent, giving results expressed as 0.1 mg of Gallic acid measured at 755 nm (Phenolic Compounds) and 0.25 mg of catechin at 510 nm (Flavonoids). Finally, the Uplc-QToF analysis was performed for the compounds with the highest antivenom affinity such as polyphenols and flavonoids, thus obtaining secondary metabolites with their respective spectral information in positive and negative ionization, giving metabolomic groups such as: saponins, alkaloids, anthocyanins, coumarins, phenols, flavonoids and terpenoids.Item SÍNTESIS DE ÉSTERES USANDO COMO FUENTE ALTERNA DE ENERGÍA MICROONDAS PARA SU POSIBLE USO COMO LUBRICANTE(Universidad Técnica de Ambato. Facultad de Ingeniería en Sistemas, Electrónica e Industrial. Maestría en Química, 2022) Álvarez Chacón, Jonathan André; Novillo Logroño, Fernando AugustoIn this study, lubricant bases synthesized by the esterification reaction of castor oil with different alcohols and two different types of heating were obtained, since some principles of green chemistry were considered to obtain non-polluting products. The reaction was carried out with a time of 2 hours, a temperature of 90°C and a minimum amount of acid catalyst. An experimental design was established based on previous studies in triplicate, to determine important physicochemical properties such as relative density, boiling point, pour point, kinematic viscosity and viscosity index based on the Ecuadorian technical standard NTE INEN 2029:2013; in addition, the oxidation onset temperature was studied by differential scanning calorimetry and characterized by gas chromatography with mass spectrometry. It was determined that the lubricant bases from 1-octanol alcohol have a higher oxidation onset temperature than the others, and its value is like that of a commercial 5W40 oil, highlighting that the lubricant base is thermally stable at large temperature changes