Chemical Characterization and Bioaccessibility Assessment of Bioactive Compounds from Umbu (Spondias tuberosa A.) Fruit Peel and Pulp Flours

Umbu, a common fruit from the northeastern region of Brazil, contains many bioactive compounds not yet exploited. Thus, this study evaluated the potential of pulps and peels of mature and semi-mature umbu as a source of bioactive compounds. Trigonelline contents ranged from 1.75 to 6.14 mg/100 g, values higher than those of many vegetables described in the literature, such as corn and barley. The contents of extractable and non-extractable phenolic compounds were also higher than those of other vegetables. Bioaccessibility of total extractable phenolics, flavonoids, and tannins was determined (15.67–37.73%, 31.87–39.10% and 18.81–114.27%, respectively). The constituent polysaccharides of the pulp and peel were tentatively chemically characterized as arabinoxylans, arabinogalactans, rhamnoarabinogalactans, xyloglucans, and pectin of the rhamnogalacturonan type. The technological potential of peel flours was evaluated. The maturation advancement showed no significant changes in the technological properties of the flours, except for color and water solubility index. Results indicated excellent prospects for future research on umbu pulps and peels as potential sources of natural bioactive compounds

Elaboration of a cereal bar enhanced with flour of buriti pulp (Mauritia flexuosa L.)

The buriti (Mauritia flexuosa L) shows high percentage of sugar, proteins, and carotenoids among others. The developing of the cereal bar added with dehydrated fruit has become a very important activity due its popularity, practicality, nutritional value and sensory characteristics. This work had as a goal, elaborate a cereal bar enhanced with different concentrations of 10%, 20% and 30% buriti flour. About the buriti pulp physical and chemical composition, were found 60.33% of moisture, 3.69% of protein, 49.8% of lipids, 0.18% of ashes, 46.64% of carbohydrates and 4.7mg of carotenoid/100 g of buriti sample. About the cereal bar physical and chemical characterization, 12.4% of moisture, 11.96% of lipid percentage, 6.76% of protein percentage, 0.16% of ashes and 68.72% of carbohydrates percentage. As for the smell, the 30% flour sample revealed a significant difference from the 10% sample, but similarity with the 20% sample. About the buriti flavor, the 30% sample revealed a significant difference with the average of 8.1. This sample has shown bigger averages for the sensorial tonality, compression, cereal flavor, buriti flour smell and buriti flour flavor attributes, having a bigger rating of acceptability