Polyhydroxy butyrate (PHB) is a Polyhydroxyalkanoates (Polyhydroxyalkanoates (PHA) or the polyhydroxy fatty acids, are a family of biodegradable polyesters. As in many mammals, including humans, that hold ... More), a polymer belonging to the polyesters class that are of interest as bio-derived and Biodegradable plastics are plastics that are completely assimilated by the microorganisms present a defined environment as food for their energy. The .... PHB is produced by microorganisms – primarily as a product of carbon assimilation (from Monosaccharide (or simple sugar). Glucose is the most important carbohydrate (sugar) in biology. Glucose is formed by photosynthesis or hydrolyse of m... or Natural polymer (carbohydrate) consisting of amylose and amylopectin, gained from maize, potatoes, wheat, tapioca etc. When glucose is connected to po... More) and is employed by microorganisms as a form of energy storage Group of at least two atoms held together by covalent chemical bonds. to be metabolized when other common energy sources are not available.