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. 2020 Sep 26;13:163. doi: 10.1186/s13068-020-01802-z

Fig. 1.

Fig. 1

Time courses of ABE fermentation by C. acetobutylicum in the presence of four PCs. Each PC was added 12 h after the beginning of fermentation. Con, Van, Coum, Syr, and Fer denote the control, vanillin, p-coumaric acid, syringaldehyde, and ferulic acid samples, respectively. Error bars represent the standard deviation of three biological replicates