Polifenoles totales y actividad antioxidante de los extractos metanólico y etanólico del epicarpio de la pomarrosa Syzygium malaccense L.
No hay miniatura disponible
Fecha
2020
Título de la revista
ISSN de la revista
Título del volumen
Editor
Universidad de Guayaquil. Facultad de Ciencias Químicas
Resumen
La pomarrosa es una fruta exótica que tiene poco o nulo uso debido a que se desconocen sus características organolépticas, propiedades medicinales y nutricionales siendo vista como una planta invasora y fuente de tala. El estrés oxidativo es un término asociado a las células y a la acción de un radical libre que le afecta, éste se podrá vincular con un déficit en el sistema antioxidante o por la proliferación descontrolada de los radicales libres; este desequilibrio está ligado a condiciones patológicas como cáncer, diabetes, aterosclerosis, desórdenes neurodegenerativos y envejecimiento. La pomarrosa (Syzygium malaccense L) es un fruto introducido en Ecuador y del cual no existen estudios de la composición química de la cáscara, por lo que se evaluó los metabolitos secundarios, la concentración de polifenoles totales y su actividad antioxidante en los extractos metanólico y etanólico de su epicarpio. El Tamizaje fitoquímico de la cáscara dio positivo para la presencia de alcaloides, flavonoides, taninos, cumarinas, antocianidinas, leucoantocianidinas. La concentración de la vitamina C fue 64.50 mg/Kg. La concentración de polifenoles se determinó a través del método de Folin
– Ciocalteu y dio en extracto metanólico 489.05 mg EAG/kg y en extracto etanólico
581.07 mg EAG/Kg. La actividad antioxidante determinada por el método de DPPH
reportó un IC50 del extracto metanólico de 214.0 mg /mL y del extracto etanólico
265.0 mg/mL.
The pomarrosa is an exotic fruit that has little or no use because its organoleptic characteristics, medicinal and nutritional properties are unknown being seen as an invasive plant and source of felling. Oxidative stress is a term associated with cells and the action of a free radical that affects it, this can be linked to a deficit in the antioxidant system or uncontrolled proliferation of free radicals; This imbalance is linked to pathological conditions such as cancer, diabetes, atherosclerosis, neurodegenerative disorders and aging. The pomarrosa (Syzygium malaccense L) is a fruit introduced in Ecuador and of which there are no studies of the chemical composition of the peel, so secondary metabolites, the concentration of total polyphenols and its antioxidant activity in methanolic extracts and Etanolic of his epicarp. The phytochemical screening of the shell tested positive for the presence of alkaloids, flavonoids, tannins, coumarins, anthocyanidins, leucoanthocyanidins. The concentration of vitamin C was 64.50 mg / kg. The concentration of polyphenols was determined through the Folin-Ciocalteu method and gave in methanolic extract 489.05 mg EAG / kg and in ethanolic extract 581.07 mg EAG / Kg. The antioxidant activity determined by the DPPH method reported an IC50 of methanolic extract of 214.0 mg / mL and of ethanolic extract 265.0 mg / mL.
The pomarrosa is an exotic fruit that has little or no use because its organoleptic characteristics, medicinal and nutritional properties are unknown being seen as an invasive plant and source of felling. Oxidative stress is a term associated with cells and the action of a free radical that affects it, this can be linked to a deficit in the antioxidant system or uncontrolled proliferation of free radicals; This imbalance is linked to pathological conditions such as cancer, diabetes, atherosclerosis, neurodegenerative disorders and aging. The pomarrosa (Syzygium malaccense L) is a fruit introduced in Ecuador and of which there are no studies of the chemical composition of the peel, so secondary metabolites, the concentration of total polyphenols and its antioxidant activity in methanolic extracts and Etanolic of his epicarp. The phytochemical screening of the shell tested positive for the presence of alkaloids, flavonoids, tannins, coumarins, anthocyanidins, leucoanthocyanidins. The concentration of vitamin C was 64.50 mg / kg. The concentration of polyphenols was determined through the Folin-Ciocalteu method and gave in methanolic extract 489.05 mg EAG / kg and in ethanolic extract 581.07 mg EAG / Kg. The antioxidant activity determined by the DPPH method reported an IC50 of methanolic extract of 214.0 mg / mL and of ethanolic extract 265.0 mg / mL.
Descripción
Pdf
Palabras clave
EPICARPIO, POLIFENOLES TOTALES, ACTIVIDAD ANTIOXIDANTE, ÁCIDO ASCÓRBICO, TAMIZAJE FITOQUÍMICO PRELIMINAR