title: Characterization of an extracellular polysaccharide produced by a Pseudomonas strain grown on glycerol.
abstract: A new extracellular charged polysaccharide composed mainly by galactose, with lower amounts of mannose, glucose and rhamnose, was produced by the cultivation of Pseudomonas oleovorans NRRL B-14682 using glycerol as the sole carbon source. Thermal and solid-state NMR analysis showed that this polymer is essentially amorphous, with a glass transition temperature of 155.7 degrees C. The exopolysaccharide aqueous solutions have viscoelastic properties similar to that of Guar gum, but with affinity to salts as a result of its polyelectrolyte character. In addition, the exopolysaccharide has demonstrated good flocculating and emulsifying properties and film-forming capacity. These properties make this polymer a good alternative to more expensive natural polysaccharides, such as Guar gum, in several applications in the food, pharmaceutical, cosmetic, textile, paper and petroleum industries.
authors: CQFB/REQUIMTE, Chemistry Department, FCT/Universidade Nova de Lisboa, Caparica 2829-516, Portugal.
authors: Filomena
authors: F
authors: Freitas
authors: Vitor D
authors: VD
authors: Alves
authors: Joana
authors: J
authors: Pais
authors: Nuno
authors: N
authors: Costa
authors: Cristina
authors: C
authors: Oliveira
authors: Luís
authors: L
authors: Mafra
authors: Loic
authors: L
authors: Hilliou
authors: Rui
authors: R
authors: Oliveira
authors: Maria A M
authors: MA
authors: Reis
mesh_terms: D049109:Cell Proliferation; D004548:Elasticity; D005881:Gingiva / Q000737:chemistry; D005990:Glycerol / Q000378:metabolism*; D006244:Hardness; D011135:Polysaccharides, Bacterial / Q000737:chemistry* / Q000378:metabolism*; D044204:Pseudomonas oleovorans / Q000737:chemistry* / Q000378:metabolism*; D013045:Species Specificity; D014783:Viscosity
chemical_list: D011135:Polysaccharides, Bacterial; D005990:Glycerol