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Table 1 Experimental range and levels of the independent variables in terms of actual and coded factors in the optimization of components for LiP synthesis

From: Lignin degradation in corn stalk by combined method of H2O2 hydrolysis and Aspergillus oryzae CGMCC5992 liquid-state fermentation

Independent variable Symbol Level (g/L)
−1 0 1
Glucose X 1 2 5 8
Sodium nitrate X 2 0.1 1.1 2
Corn steep liquor X 3 0.1 1.1 2
Yeast extract X 4 0.1 1.1 2
VB1 X 5 0 0.01 0.02