657160.fig.001a
(a)
657160.fig.001b
(b)
657160.fig.001c
(c)
657160.fig.001d
(d)
Figure 1: Growth, total gas production, hydrogen production, and pH change in Clostridia. Note that all four strains including Clostridium sp., C. acetobutylicum, C. pasteurianum, and C. sphenoides were grown in MSM medium, while C. sphenoides was also in SCM medium (marked with dashed line).