Fig. 8From: Application of a novel biological-nanoparticle pretreatment to Oscillatoria acuminata biomass and coculture dark fermentation for improving hydrogen productionScanning Electron Microscopy (SEM) observation of O. acuminata biomass at 2000 × magnification. Where, A, untreated biomass; B, Chemical pretreatment; C, Biological pretreatment and D, Biological pretreatment enhanced by Mg-Zn Fe2o4-NPsBack to article page