Examinando por Autor "Barrientos Lezcano, Juan Camilo"
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Ítem Booklet Use of Antioquian propolis. Quality criteria and extraction protocols(Universidad EAFIT, 2021) Marín Palacio, Luz Deisy; Builes Toro, Santiago; Barrientos Lezcano, Juan Camilo; Universidad EAFITThis booklet is aimed at beekeepers in the Antioquia region, and aims to improve the processes of collecting and extracting propolis in beekeeping communities.Ítem Estudio de la reacción de oxidación química de cianuro para el tratamiento de aguas residuales de una empresa minera(Universidad EAFIT, 2018) Barrientos Lezcano, Juan Camilo; Medina Arroyave, José DavidÍtem Extraction kinetics and physicochemical characteristics of Colombian propolis(Universidad EAFIT, 2023) Barrientos Lezcano, Juan Camilo; Barrientos, Juan Camilo; Builes Toro, SantiagoPropolis, a resinous matter collected by Apis mellifera bees from exudates of plants, exhibits different biological properties, such as antimicrobial, antifungal, antiviral, and antioxidant activities. Standardization of the extraction of their bioactive compounds is a complex issue in particular for rural regions in developing countries due to the need for specialized equipment and personnel. Herein, kinetic extractions by maceration over 7 days were compared with ultrasound and supercritical fluids extractions in terms of the polyphenolic content obtained. Ultrasound showed the fastest kinetic extraction for each propolis without affecting the antioxidant activity. Supercritical fluids showed the lowest polyphenolic content recovery and no selectivity for antioxidant activity, in agreement with the solubility predictions. The main difference among the extraction methods was the extraction time required to reach the equilibrium concentration. No significant differences in selectivity were observed for the different methods. The antioxidant activity remained almost constant with the extraction method and extraction time, indicating similar extraction kinetics for the extracted polyphenols. We found that the physicochemical characteristics and UVvis spectra could be used as predictors of the polyphenolic contents for the studied samples.Ítem Generación de valor agregado de propóleos, en la cadena productiva Apícola Antioqueña(Universidad EAFIT, 2019) Marín Palacio, Luz Deisy; Builes Toro, Santiago; Barrientos Lezcano, Juan Camilo; Universidad EAFITÍtem Introduction to methodologies for extracting bioactive compounds from propolis(Universidad EAFIT, 2021) Marín Palacio, Luz Deisy; Builes Toro, Santiago; Barrientos Lezcano, Juan Camilo; Universidad EAFITThis document describes the main methods used for the extraction of active compounds from propolis.Ítem Quality criteria for propolis analysis(Universidad EAFIT, 2021) Marín Palacio, Luz Deisy; Builes Toro, Santiago; Barrientos Lezcano, Juan Camilo; Universidad EAFITThis document describes the main methodologies and criteria used to measure the quality of propolis.