# Fig nbsp xA Overlay plot of perturbation of

The significance of each coefficient for the removal percentage of AB25 dye by P. indicus shell Istradefylline was determined by F-values and P-values as listed in Table 5. Values were used to understand the pattern of the interactions between the test variables. Based on these results, a relationship between the removal percentage of AB25 dye and selected variables was expressed by the second-order polynomial equation.

Table 5.