Fig. 4

Model graphs for Gelation pH, Gelation time, Viscosity (a, b, c) Perturbation curve, 2D contour plot and 3D Response surface plot for Gelation pH. (d, e, f) Perturbation curve, 2D contour plot and 3D Response surface plot for gelation time. (g, h, i) Perturbation curve, 2D contour plot and 3D Response surface plot for viscosity