from each other however as shown in fig3 it can be seen that the physical and morphological changes thereof observed using an electron microscope were greatly different from each other further as shown in fig3 it can be seen that the surface area of the pretreated product control obtained by immersing and then wet milling rice straw is larger than that of the non pretreated product and the surface area of the pretreated product popping obtained by immersing and then popping rice straw is larger than that of the pretreated product control obtained by immersing and then wet milling rice straw in particular it can be seen that there is a remarkable increase in the surface area of the pretreated product wet milling popping obtained by immersing wet milling and then popping rice straw cellulase 600 u g biomass and xylanase 300 u g biomass were added to 50 mg of the pretreated rice straw product wet milling popping obtained from example 1 and then this pretreated rice straw product was saccharified at a temperature of 37 u00b0 c for 24 hours to obtain a sugar compound wet milling popping cellulase 600 u g biomass and xylanase 300 u g biomass were added to 50 mg of each of the pretreated rice straw products obtained from comparative examples 1 and 2 and then these pretreated rice straw products were respectively saccharified at a temperature of 37 u00b0 c for 24 hours to obtain a comparative sugar compound popping and a comparative sugar compound control the concentrations of the comparative sugar compound popping and comparative sugar compound control obtained from comparative example 3 and the sugar compound wet milling popping obtained from example 2 were measured using high performance liquid chromatography hplc and.