Fig. 4From: Optimization of extraction parameters of PTP1β (protein tyrosine phosphatase 1β), inhibitory polyphenols, and anthocyanins from Zea mays L. using response surface methodology (RSM)Response surface plot for the effects of extraction temperature, extraction time, solvent-liquid ratio, and solvent volume on total anthocyanin content of extract. (X1, extraction temperature (°C); X2, extraction time (hour); X3, Solid-liquid ratio (%); X4, solvent volume (1:X); Y3, total anthocyanins content (mg C3GE/100 g))Back to article page