Fig. 6
From: Model-based driving mechanism analysis for butyric acid production in Clostridium tyrobutyricum
Comparison of the fermentation characteristics between the wild-type and ΔhydA strains under different pH in a stirred-tank bioreactor. A Fermentation kinetics of the wild-type and ΔhydA strains in CGM with glucose as a substrate. B Butyrate yields. C Butyrate purity (butyric acid titer/total acid titer, BA/TA). D NADH/NAD+ ratio in the wild-type and ΔhydA strains. The values represent the averages of three replicates and the error bars represent the standard errors of these experiments (*p ≤ 0.05; **p ≤ 0.01; ***p ≤ 0.001, t test)