Viscosity of SR-2P gel with increasing volume of 1 ml (a), 2 ml (b), 3 ml (c), 4 ml (d), 8 ml (e) exposed to VFS (1 ml) or VFS + SFS (4.5 ml) mixture at 37°C under horizontal shear (at 70 rpm) at 0, 30, 35, 40, and 70 min time points. a VFS; b VFS + SFS. Error bars represent average values with ±SD (n = 3)