SEARCH Articles Figures Tables Polyhydroxyalkanoate Polyhydroxyalkanoate extracellular degradation Polyhydroxyalkanoates bacterial degradation Polyhydroxyalkanoates degradation Polyhydroxyalkanoates degradation Polyhydroxyalkanoates degradation mechanism Polyhydroxyalkanoates enzymatic degradation Polyhydroxyalkanoates extracellular degradation Polyhydroxyalkanoates intracellular degradation Polyhydroxyalkanoates thermal degradation