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Mikrobiol Z. 2004 May-Jun;66(3):72-9.

[Stages of biofilm formation by sulfate-reducing bacteria].

[Article in Ukrainian]


Taxis to Fe3+ ions and adhesion to steel-3 of sulphate-reducing bacteria different by corrosion activity have been investigated. It has been shown that taxis activity of cells from the Postgate medium "B" was higher than from the buffer. Aggressive strains Desulfovibrio indonensis, Desulfovibrio sp. possessed higher activity taxis with respect to Fe3+ ions. It has been noted that aggressive strains of sulphate-reducing bacteria adhered more actively to the steel surface and formed more powerful proteins than nonagressive strains (19.4 +/- 0.3 x 10(8) cell/cm2 in aggressive strain Kiev-10 and 3.4 +/- 0.1 x 10(8) cell/cm2 in nonaggressive strain Kiev-45). The authors have proposed a new approach to the study of microbe-induced corrosion with the use of thin metal matrices. This method permits estimating the corrosive effect on metal matrix of exopolymers of sulphate-reducing bacteria and showing that more aggressive strains of these bacteria lead in formation and functioning of the biofilm.

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