The preferential use of a soy-rapeseed lecithin blend for the liposomal encapsulation of a tilapia viscera hydrolysate

Viscera of tilapia (Oreochromis spp.) were used for the production a protein hydrolysate, which was characterized in terms proximate composition, molecular weight distribution, amino acid composition and antioxidant activity (ABTS radical scavenging capacity, ferric ion reducing power (FRAP) chelating activity). Liposomes from soy lecithin (SL), rapeseed (RL), soy-rapeseed (SRL) blend (1:1, w/w) prepared, showing average particle sizes 153, 218 193 nm, respectively, similar ? potential ?46 mV. Rapeseed liposomes presented much higher than with SL. made SRL, having intermediate hydrodynamic properties other two, selected to encapsulate hydrolysate at different concentrations (5, 10 20 g/100 g, respect lecithin). loaded g (SRLH20) had smaller size ABTS values iron activity, while 5 (SRLH5) electronegative entrapment efficiency, calculated as function total content, capacity individual residues. Charged residues alanine highly entrapped both SRLH5 SRLH20. No clear preference encapsulating hydrophobic or hydrophilic acids observed.