High retention and purification of bromelain enzyme (ananas comosus L. Merrill) from pineapple juice using plain and hollow polymeric membranes techniques - Carbajal Gamarra, Felix Martin; Santana, José Carlos Curvelo; Vasquez Llanos, Segundo Alberto; Heredia Pérez, Jorge Antonio; Flausino, Fabio Richard; Barturen Quispe, Ada Patricia; Córdova Mendoza, Pedro; Vanalle, Rosangela Maria; Carreño Farfan, Carmen Rosa; Berssaneti, Fernando Tobal; Souza, Roberto Rodrigues de; Tambourgi, Elias Basile (Polymers, 2022)