Fig. 6From: Structural changes in lignocellulosic biomass during activation with ionic liquids comprising 3-methylimidazolium cations and carboxylate anionsScanning electron microscopy (SEM) images for untreated hybrid poplar and IL-activated samples after 72 h. The SEM micrographs of control (untreated HP) (a), [EMIM][CH3COO]-activated HP (b), and [AMIM][HCOO]-activated HP (c). Images were taken at ×400 magnificationBack to article page