Table 1.

ANOVA table for response as affected by independent variables during optimization experiments

	Phosphomolybdate reduction assay		DPPH radical scavenging
	Regression coefficient	p value	Regression coefficient	p value
Regression	0.238	0.000	− 9.544	0.000
Time (X1)	0.004	0.001	0.714	0.114
Enzyme ratio (X2)	− 0.179	0.237	− 4.629	0.003
X1·X2	− 1.033	0.010	0.010	0.007
${\text{X}}_1^2$	− 9.339	0.213	− 0.003	0.011
${\text{X}}_2^2$	0.055	0.188	4.644	0.389
Lack of fit		0.12		0.54
R2	84.65		83.15	0.000