3 hydroxybutyric acid 1 3-Hydroxybutyric Acid 1 4 hydroxybutyric acid 1 4-hydroxybutyrate 1 Article 1 Bacillus megaterium 1 Biodegradable plastic 1 Cupriavidus 1 Hydroxybutyrates 1 Polyhydroxyalkanoate copolymers 1 Polyhydroxyalkanoates 1 Polymers 1 Succinic Acid 1 Xylose 1 bacterial growth 1 bacterial strain 1 bioengineering 1 biosynthesis 1 chemistry 1 concentration (parameter) 1 controlled study 1 copolymer 1 differential scanning calorimetry 1 gel permeation chromatography 1 glucose 1 hydroxybutyric acid mass fragmentography 1 metabolism 1 nonhuman 1 nuclear magnetic resonance 1