title: [Biopolymer of alginate nature with a predominance of L-guluronic acid].
abstract: Highly viscous polysaccharide (250-350 kDa) of an alginate nature with a predominance of alpha-L-guluronic acid (M/G = 0.22) was obtained from Azotobacter vinelandi. The yield ofpolysaccharide was 20.5 +/- 0.5 g/l when cultured in a medium containing molasses at a viscosity of the cultural liquid of over 30000 cSt. The biopolymer is stable at pH 4.0-9.0 in a wide temperature range and well soluble in highly mineralized water; it retains a high viscosity level and can be used in the petroleum industry for enhanced oil recovery.
authors.forename: Ia O
authors.initials: IaO
authors.lastname: Loginov
authors.forename: G G
authors.initials: GG
authors.lastname: Khudaĭgulov
authors.forename: S P
authors.initials: SP
authors.lastname: Chetverikov
authors.forename: A I
authors.initials: AI
authors.lastname: Melent'ev
authors.forename: O N
authors.initials: ON
authors.lastname: Loginov
mesh_terms: D000464:Alginates / Q000737:chemistry; D016948:Azotobacter vinelandii / Q000737:chemistry / Q000254:growth & development*; D001704:Biopolymers / Q000096:biosynthesis* / Q000737:chemistry; D005285:Fermentation; D020723:Glucuronic Acid / Q000096:biosynthesis / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007218:Industrial Microbiology; D008965:Molasses / Q000382:microbiology; D012995:Solubility; D013696:Temperature; D014783:Viscosity
chemical_list: D000464:Alginates; D001704:Biopolymers; D006603:Hexuronic Acids; C007896:guluronic acid; D020723:Glucuronic Acid