Fig. 7From: Application of a novel biological-nanoparticle pretreatment to Oscillatoria acuminata biomass and coculture dark fermentation for improving hydrogen productionThe diagnostic fingerprint regions of the FT-IR spectra of raw and pretreated O. acuminata biomass. A, untreated biomass; B, Chemical pretreatment; C, Biological pretreatment, and D, Biological pretreatment enhanced by Mg-Zn Fe2o4-NPsBack to article page