WOS: 000232889800016In this study, Poly-beta-hydroxybutyrate (PHB) accumulation was investigated in Pseudomonas cepacia G13 strain. Determination of the amount of PHB was performed chemically. The yield of PHB produced by the A cepacia G13 strain according to dry cell weight was 67.37% w/w. P. cepacia G13 was examined for PHB production in different carbon and nitrogen sources. The amount of PHB produced by this strain in these medium were lower than the amount of PHB production in nutrient broth medium