Fig. 5From: Hydroxyl radical-aided thermal pretreatment of algal biomass for enhanced biodegradabilityThe microscopic images of a microalgae before pretreatment; b microalgae treated by hydroxyl radicals pretreatment instantly; c microalgae treated by hydroxyl radicals pretreatment for 30 min; d microalgae treated by hydroxyl radicals pretreatment for 2 hBack to article page