Use of freeze-drying and convection as drying methods of the xoconostle by-product and the effect on its antioxidant properties

In this study, the influence of drying method (lyophilization and convection) on techno-functional antioxidant properties by-product xoconostle cv. Cuaresmeño (Opuntia matudae) was evaluated. During convection drying, effect temperature (60, 70 80 °C) evaluated, resulting in times 195, 165 120 minutes, respectively. The equilibrium humidity determined through kinetics, which were affected by increasing from 60 to 80°C. time for decreased, humidities 0.04, 0.03 0.02 g water/g dry sample reached 60, °C, Fick's second law used along experiments determine effective diffusivity, ranged 4.788 E-10–8.109 E-10 m2/s evaluated temperatures. Convective at 60°C proved be a suitable alternative conservation capacity (88.07 ± 0.38% 2,2-diphenyl-1-picrylhydrazyl (DPPH) inhibition) compared These 8% higher results freeze drying. However, convective is more convenient by-products due cost-benefit ratio.