Fig. 3 | Scientific Reports

Fig. 3

From: Optimization of Aspergillus Niger fermentation for enzyme production and enzymatic hydrolysis of wheat bran for total ferulic acid via RSM

Fig. 3

Results of single-factor experiments for enzyme production by A. niger fermentation. (a) Effects of fermentation time on enzyme production; (b) Effects of A. niger seed culture inoculum size on enzyme production; (c) Effects of moisture content on enzyme production; (d) Effects of different nitrogen sources on enzyme production; (e) Effects of yeast extract concentration on enzyme production; (f) Effects of different carbon sources on enzyme production; (g) Effects of xylose concentration on enzyme production; (h) Response surface plot showing the interaction between fermentation time and yeast extract concentration on FAE activity produced by A. niger. Data are presented as mean ± SEM from three independent experiments. *P < 0.05; **P < 0.01; ***P < 0.001; ns, not significant.

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