Rheograms obtained from unloaded and loaded formulations ((a,b), respectively). Ascending curves are denoted by close symbols and descending curves are denoted by open symbols; oscillatory sweep obtained from unloaded and loaded formulations ((c,d), respectively). G′ and G″ moduli are shown as closed and open symbols, respectively. A = formulation with OA%/S%/W% ratio of 40/50/10; B = formulation with OA%/S%/W% ratio of 30/50/20; C = formulation with OA%/S%/W% ratio of 20/50/30; D = formulation with OA%/S%/W% ratio of 10/50/40; AAU = formulation A loaded with AU; BAU = formulation B loaded with AU; CAU = formulation C loaded with AU; DAU = formulation Dloaded with AU.