title: Effect of C:N molar ratio on monomer composition of polyhydroxyalkanoates produced by Pseudomonas mendocina 0806 and Pseudomonas pseudoalkaligenus YS1.
abstract: Polyhydroxyalkanoates (PHAs) are biodegradable polymers produced by bacteria. In this study, the effect of C:N molar ratio on the monomer composition of PHAs was investigated, including medium chain length PHA produced by Pseudomonas mendocina 0806 and PHA blends consisting of monomers of 3-hydroxybutyrate and medium chain length hydroxyalkanoate produced by Pseudomonas pseudoalkaligenus YS1. It was observed that there were some fixed ranges of C:N molar ratio that affect the monomer composition of PHA independently of the substrate. For strain 0806, the ranges were C:N < 20, 20 < C:N < 200, and C:N > 200. The monomer composition was constant among these ranges when using glucose and octanoate as the sole substrate. For strain YS1, the ranges were C:N < 20, 20 < C:N < 45, and C:N > 45. These results are useful for controlling monomer composition in PHA production.
authors.affiliation: Engineering School, South China University of Tropical Agriculture, Danzhou, Hainan, China.
authors.forename: K
authors.initials: K
authors.lastname: Hong
authors.forename: G Q
authors.initials: GQ
authors.lastname: Chen
authors.forename: P H
authors.initials: PH
authors.lastname: Yu
authors.forename: G
authors.initials: G
authors.lastname: Zhang
authors.forename: Y
authors.initials: Y
authors.lastname: Liu
authors.forename: H
authors.initials: H
authors.lastname: Chua
mesh_terms: D020155:3-Hydroxybutyric Acid; D002244:Carbon; D002681:China; D003470:Culture Media; D005648:Fuel Oils; D009584:Nitrogen; D011091:Polyesters / Q000737:chemistry*; D011549:Pseudomonas / Q000302:isolation & purification / Q000502:physiology*; D013045:Species Specificity; D014871:Water Microbiology; D014874:Water Pollutants, Chemical
chemical_list: D003470:Culture Media; D005648:Fuel Oils; D011091:Polyesters; D014874:Water Pollutants, Chemical; D002244:Carbon; D009584:Nitrogen; D020155:3-Hydroxybutyric Acid