Fig. 2From: From nano- to micrometer scale: the role of microwave-assisted acid and alkali pretreatments in the sugarcane biomass structureTEM and SEM images of sugarcane bagasse sclerenchyma cells. TEM images of the control sample before pretreatment (a) and samples pretreated at 160 °C for 30 min in 1% H2SO4 (b) and 1% NaOH (c). SEM images of the untreated substrate (d) and samples pretreated at 160 °C for 30 min in 1% H2SO4 (e) and 1% NaOH (f)Back to article page