Figure 2From: Thermophilic fermentation of acetoin and 2,3-butanediol by a novel Geobacillus strainGrowth of XT15 in a crude oil-based mineral-salts medium at 55°C. Left, the control experiment using heat-inactivated XT15 cells; middle, bacterial growth of XT15 using crude oil as the sole carbon source; right, observation of the culture medium in the middle through a light microscope.Back to article page