title: [Effect of lipolytic and catalase activity on physico-mechanical properties of coating Polyken 980-25].
abstract: Lipolytic and catalase activity of Pseudomonas pseudoalcaligenes 109, Rhodococcus erythropolis 102, Bacillus subtilis 138 and their association with different growth models: biofilm and plankton ones. It is shown that under biofilm conditions the fermentative activity of bacteria under study was 1.5-1.7 times higher than under plankton conditions. Monocultures of bacteria displayed much lower activity than associative ones. Changes of physico-chemical properties of the specimens of protective coating Polyken 980-25 with participation of the above bacteria have been studied. The coating breaking strength decreases by 5.9-11.8% under the effect of monocultures, and by 17.3% under the effect of association. The adhesive strength as the basic index of coating biologic resistance decreased, respectively, in mono- and associated cultures by 28.6-73.2% in respect of the control. Damaging the sticking layer of isolation coating, bacteria damage the adhesion to metal which favors its corrosion.
authors.forename: Zh P
authors.initials: ZhP
authors.lastname: Kopteva
authors.forename: V V
authors.initials: VV
authors.lastname: Zanina
authors.forename: M A
authors.initials: MA
authors.lastname: Boretskaia
authors.forename: A E
authors.initials: AE
authors.lastname: Kopteva
authors.forename: I A
authors.initials: IA
authors.lastname: Kozlova
mesh_terms: D001412:Bacillus subtilis / Q000201:enzymology*; D018441:Biofilms / Q000254:growth & development*; D002374:Catalase / Q000378:metabolism*; D003343:Corrosion; D008066:Lipolysis; D008422:Materials Testing; D010084:Oxidation-Reduction; D010933:Plankton / Q000254:growth & development*; D011108:Polymers / Q000737:chemistry; D044205:Pseudomonas pseudoalcaligenes / Q000201:enzymology*; D012240:Rhodococcus / Q000201:enzymology*; D013232:Steel / Q000737:chemistry
chemical_list: D011108:Polymers; D013232:Steel; D002374:Catalase