Chemical composition and physicochemical characterization for cabbage and pineapple by-products flour valorization

摘要

Cabbage stalks (CSF) and pineapple crowns (PCF) were collected after fresh-cut processing and transformed into flour by drying in oven. Both flours presented greenish colors and heterogeneous particles (30-150 CSF and PCF presented similar aw (0.43) and moisture (10%). CSF presented higher mineral content (18.1 g.100 g(-1)), especially for Ca (1671.11 mg.100 g(-1)) and K (8582.93 mg.100 g(-1)), than PCF (5.9 g.100 g(-1)) that presented also high content of K (2250.62 mg.100 g(-1)). PCF and CSF presented great fiber content (67.22 and 42.67 g.100 respectively), especially insoluble fiber (about 87% of total fiber). Malto-oligosaccharides were identified in PCF and no fructo-oligosaccharides was detected. The ethanolic extract of PCF was considered as cytotoxic, while the aqueous extracts were considered safe. Thus, the direct recovery of high-added value molecules can be obtained by water extraction of CSF and PCF, specially focusing in the great levels of fiber and mineral compounds.