Figure 5

Surface images of the untreated sugarcane bagasse obtained by scanning electron microscopy. (a) General view of the sample showing fibers and pith (arrows F and P); (b) amplifications on the fiber surface, with parallel stripes covered by residues; (c) amplification on the pith; and (d) amplifications on the fiber surface, with parallel stripes covered by residues. Samples underwent roll and knife milling.