Table 3.

Regression of coefficients and analysis of variance (ANOVA) of the first order model for response variables in PBD

Source	Gallic acid		CAT		Viable cell numbers
	Coefficient	p-value	Coefficient	p-value	Coefficient	p-value
	Estimate	Prob > F	Estimate	Prob > F	Estimate	Prob > F
Model	2.32	< 0.0001	11.7641	0.0011	6.91	0.0006
A-Tannic acid	1.76	< 0.0001*	5.2333	< 0.0001*	0.21	0.0047*
B-Yeast extract	0.045	0.5695	− 1.1269	0.0921	− 0.31	0.0015
C-Glucose	− 0.22	0.0273*	− 2.1026	0.0097*	0.09	0.0879*
D-(NH4)2SO4	− 0.32	0.0047	− 0.7756	0.2173	− 0.18	0.0137
E-Tween80	− 0.39	0.0020	− 2.4072	0.0052	− 0.24	0.0049
F-Glutamate	3.30E−03	0.9658	0.5835	0.3398	0.02	0.6723
G-Time	0.045	0.5695	− 1.3847	0.0491	− 0.51	0.0002*

Gallic acid production: R² = 0.9823, Adj-R² = 0.9541, %C.V. = 2.17, lack of fit = 0.0182

CAT production: R² = 0.9904, Adj-R² = 0.9737, %C.V. = 10.78, lack of fit = 0.2074

Viable cell production: R² = 0.9564, Adj-R² = 0.9056, %C.V. = 11.91, lack of fit = 0.0019

* Significant difference at p < 0.05