Inhibitory effect of pineapple shell extract and its ultrafiltered fractions on polyphenol oxidase activity and browning in fresh-cut banana slices Efecto inhibidor de extracto de c????scara de pi???±a y sus fracciones ultrafiltradas en la actividad polife

摘要

Pineapple shell extract (PSE) and its ultrafiltered fractions were tested for enzymatic browning inhibition of fresh-cut banana slices and for banana polyphenol oxidase (PPO) inhibition. PSE and its permeate were effective in browning inhibition of banana slices stored at 5???????°C. They also showed significantly higher inhibitory effect on banana PPO than its retentate and 100????mM 4-hexylresorcinol with percentage inhibition of 65.5, 67.8, 54.1, and 38.7, respectively. PSE and its permeate contained myricetin 74.7 and 71.4????????g/ml, respectively; and the myricetin showed high inhibitory effect on banana PPO activity. The results suggested that PSE and its permeate could be potentially used as a natural antibrowning agent for enzymatic browning control in fresh-cut banana slices. Se analiz???3 extracto de c????scara de pi???±a (PSE) y sus fracciones ultrafiltradas para la inhibici???3n de pardeamiento en rodajas de pl????tano reci????n cortadas y para inhibici???3n de polifenol oxidasa de pl????tano (PFO). PSE y su filtrado resultaron efectivos en la inhibici???3n de pardeamiento de rodajas de pl????tano almacenadas a 5???????°C. Tambi????n mostraron un efecto inhibidor significativamente mayor en PFO de pl????tano que su fracci???3n retenida y 100????mM 4-hexilresorcinol con porcentajes de inhibici???3n de 65,5, 67,8, 54,1????y 38,7, respectivamente. PSE y su fracci???3n retenida conten???-an miricetin 74,7????y 71,4????????g/ml, respectivamente; el miricetin mostr???3 un alto efecto inhibidor en la actividad PFO de pl????tano. Los resultados sugirieron que PSE y su fracci???3n retenida pod???-an potencialmente ser usadas como un agente de antipardeamiento natural para el control de pardeamiento enzim????tico de rodajas frescas de pl????tano.