Fig. 6
SEM micrographs of (A) pretreated solids (PS), and of solids after 72 h of enzymatic saccharification (12.5% WIS at 12% enzyme preparation loading) with B N2 or C air. PS exhibits a relatively ordered structure, N2 a less ordered structure, and air a highly disordered structure. The graph on the lower right side D shows analysis of 50 SEM images of each of PS, PS-N2, and PS-Air and the percentage of each type of structure. Black bars refer to an ordered structure, grey bars to a less ordered structure, and light grey bars to a disordered structure