Figure 2From: Production of 2,3-butanediol from cellulose and Jatropha hulls after ionic liquid pretreatment and dilute-acid hydrolysis Images of original and freeze-dried pretreated biomass samples. (a) Untreated cellulose; (b) IL-pretreated cellulose; (c) Orginal Jatropha hulls; (d) IL-pretreated Jatropha hulls.Back to article page