Microcapsules carriers of phenolic extracts of Maclura tinctoria (L) D. Don ex steud with/without fish oil: potential additive in commercial aquafeeds

The carrier potential of microencapsules of Maclura tinctoria phenolic extracts (BE) (Pat. # MX386653B) mixed with fish oil (FO) was determined. The spray dry process produced three different FO concentrations microcapsules: T1 = BEMIC; T2 = BEFO25 (BS+FO 25 mL l^-1), and T3 = BEFO5 (BS + FO 50 mL l^-1). The significantly highest Total phenol content (TPC), total flavonoids (TFC), condensed tannins (TTC), AA., and FRAP resulted in BEFO05 (253.35 mgEGA g^-1, 98.63 EQ g^-1, and 99.49 mgECA g^-1, 47.55 ± 1.04 mgEGA mL^-1, and 7.1 ± 0.1 mgEAA, respectively). The three powders showed adequate physical properties for juvenile shrimp aquafeeds with small size and circular morphology, low water activity and moisture content, high hygroscopicity, bulk, packing, Carr index, and Hausner ratio. The high dissolution and wetting times (56 and 66 min, respectively) allow the microcapsules to resist being submerged in water for a sufficient amount of time before being ingested, preserving the chemical properties of both the phenolic compounds and the fish oil.