title: Preliminary studies on the composition and rheological properties of the extracellular polysaccharide synthesized by Pseudomonas PBI (NCIB 11264).
abstract: A microorganism isolated from a carbohydrate-rich industrial effluent synthesized an exocellular slime polysaccharide composed of glucose and galactose in a molar ratio of 7.45 +/- 0.68 : 1, and two non-carbohydrate substituents acetate (3--4%) and pyruvate (5--9%). Contamination by rhamnose and mannose was detectable in crude polysaccharide samples. Solutions of the polysaccharide were pseudoplastic, but not thixotropic, and formed gels in the presence of certain trivalent cations.
mesh_terms: D002854:Chromatography, Paper; D005110:Extracellular Space; D008854:Microscopy, Electron; D009005:Monosaccharides / Q000032:analysis; D011135:Polysaccharides, Bacterial / Q000032:analysis / Q000096:biosynthesis*; D011549:Pseudomonas / Q000378:metabolism* / Q000648:ultrastructure; D012212:Rheology; D013055:Spectrophotometry, Infrared; D014783:Viscosity
chemical_list: D009005:Monosaccharides; D011135:Polysaccharides, Bacterial