Fig. 4From: Comparative evaluation of Populus variants total sugar release and structural features following pretreatment and digestion by two distinct biological systemsAmounts of glucan (G) and xylan (X) released from solids during pretreatment (Stage 1) and biological digestion (Stage 2) for fungal enzymes and C. thermocellum after 168 h. Sugar release was normalized to 100 g of glucan plus xylan in the raw biomass for each respective Populus varietyBack to article page