Optimization of the multi-extract combination
The best extract combination showing the greatest antioxidant activity was optimized by 2-level full factorial design (FFD) owing to Design Expert Software Version 10.0.0 (Stat-Ease Inc., MN, USA). According to Table Code levels and actual values of independent variables created according to the 2-level full factorial design (FFD); (%w/v).Experimental matrix generated by 2-level full factorial design and resulting data of dependent variables (Mean).