Figure 6

Comparative fed-batch fermentations. High density cultures of S. stipitis NRRL Y-7124 parent (A) and hydrolyzate-tolerant Colony 5 (B) repitched from 6% glucan during xylose uptake into fresh 6% glucan hydrolyzate were then fed at 24 h with an equal volume of 12% glucan hydrolyzate. Time courses of biomass (red squares), glucose (black circles and dashed line), xylose (blue circles and solid line), xylitol (purple diamonds), ethanol (green triangles), and viable cells (aqua inverted triangles) are shown.