Sugar present in the cellulose is mostly glucose. However, hemicellulose
is a mixture of different types of sugars. It contains both C6
(glucose, mannose, and galactose) and C5 (xylose, arabinose, and
rhamnose) sugars. Glucose, mannose, and xylose constitute about 95–
97% of the total sugars. For example, distribution of sugars in loblolly
pine (Pinus taeda), a commercial pine species of the southern U.S., is
shown in Table 2 (Frederick et al., 2008a). It is to be noted that being a
biological compound, the cellulosic feedstock comprises of three basic