Fig. 5From: Biodegradation of different formulations of polyhydroxybutyrate films in soilSEM micrographs for PHB and PHB–TiO2 nanofiber films before degradation. a1 PHB before degradation, b1 PHB–TiO2 nanofiber before degradation, a2 PHB before degradation, b2 PHB–TiO2 nanofiber before degradationBack to article page