Fig. 1From: Optimization of production conditions for β-mannanase using apple pomace as raw material in solid-state fermentationEffect of organic nitrogen source on production of β-mannose by Aspergillus niger SN-09 in solid-state fermentation (SSF). The radio of apple pomace to organic nitrogen sources was 1:1 (w/w) and the initial moisture content 50 % (w/w). Error bars SDBack to article page