Figure 5.

SEM images of untreated rice straw (UTRS) and AFEX pretreated rice straw for 5 cm particles: 1A, B, C – Untreated rice straw; 2A, B, C – AFEX C1 pretreated rice straw (AC1RS); 3A, B, C - AFEX C2 pretreated rice straw (AC2RS). Magnification of images given in Figure 1A, 2A and 3A are 500 X; while, all other images are magnification at 1000X. Details of the abbreviations given in the figure are: CLF – Cellulose large fibrils, DSB – Dumbbell silica body, LC – Long cells, LF – Large flake, LL – Large lump, P – Papillae, SB – Silica body, SSC – Silicified short cells.