Improved yield of α-L-arabinofuranosidase by newly isolated Aspergillus niger ADH-11 and synergistic effect of crude enzyme on saccharification of maize stover

Bioresources and Bioprocessing

Table 3 Regression coefficient for α-L-arabinofuranosidase production

Term	Effect	Coefficient	Standard error Coefficient	T value	P value
Constant		26.02	1.579	16.48	0.039
Urea	15.88	7.94	1.579	5.03	0.025
Ammonium sulfate	−12.63	−6.32	1.579	−4.00	0.050
Protease peptone	4.21	2.10	1.579	1.33	0.410
Yeast extract	4.12	2.06	1.579	1.30	0.417
KH₂PO₄	−0.12	−0.06	1.579	−0.04	0.059
CaCl₂	−28.81	−14.40	4.737	−3.04	0.002
MgSO₄	36.24	18.12	5.470	3.31	0.047
pH	−12.73	−6.37	1.579	−4.03	0.050
Moisture Ratio	−0.65	−0.33	1.579	−0.21	0.870
Fermentation time	32.68	16.34	1.579	10.35	0.047