Sustainable production of bacterioruberin carotenoid and its derivatives from Arthrobacter agilis NP20 on whey-based medium: optimization and product characterization

Bioresources and Bioprocessing

Table 2 Statistical analysis of BBD showing coefficients, t –and p-values for significant variables affecting on pigment production by Arhrobacter agilis strain NP20

Term	Coefficients	Standard Error	t Stat	P-value	Upper 95.0%
Intercept	3.38	0.287793	11.7445391	7.87E-05	4.119796
X1	− 10.13125	0.176237	− 10.744737043	0.489932	0.321781
X2	0.96	0.176237	5.447219513	0.002832	1.413031
X3	− 10.01375	0.176237	− 10.078020071	0.940838	0.439281
X1X2	0.1275	0.249236	0.511562653	0.630741	0.768182
X1X3	− 10.34	0.249236	− 11.364167074	0.230711	0.300682
X2X3	− 10.1125	0.249236	− 10.451378811	0.67062	0.528182
X1X1	0.59	0.259413	2.274362073	0.072044	1.256843
X2X2	0.2725	0.259413	1.05044689	0.341609	0.939343
X3X3	− 10.29	0.259413	− 11.117906782	0.314422	0.376843