Fig. 5

Scanning electron micrographs for anaerobic growth of S. cerevisiae D5A on a 50 g/L glucose at 37 °C, b 150 g/L glucose at 37 °C, c in SSF of CELF pretreated poplar with 18 wt% glucan loading at 37 °C, and of K. marxianus CBS 6556 on d 50 g/L glucose at 37 °C, e 150 g/L glucose at 37 °C, f 150 g/L glucose at 43 °C, g in SSF of CELF pretreated poplar at 18 wt% glucan loading at 37 °C and h SSF of CELF pretreated poplar at 18 wt% glucan loading at 43 °C (Magnification 10,000× at a voltage range of 2–5 kV.)