Izvestiya of Saratov University.
ISSN 1816-9775 (Print)
ISSN 2541-8971 (Online)


Dehydrogenase Activity in Oil-Contaminated Soils as a Monitoring Instrument of Bioremediation Technologies

The dynamics of dehydrogenase activity in a southern chernozemic oil-contaminated soil during natural attenuation and by  using two remediation techniques (stimulation of an indigenous microflora and introduction of active oil-oxidizing Dietzia maris strain AM3) was examined in laboratory experiments. It was shown that dehydroge­ nase activity expediently use to estimate the initial bioremediation processes and for monitoring the remediation process by bioaugmen­ tation.

Biosorption of Cu (II) by an Exopolysaccharide Isolated from Enterobacter Cloacae K7

An extracellular polysaccharide (EPS) produced by the gram- negative nonpathogenic rhizosphere bacteria Enterobacter cloa- cae K7 was isolated and characterized. The process of biosorption of Cu(II) cations from aqueous solution by the isolated exopoly- saccharides was investigated. The maximum sorption capac- ity was 0.17 mM/mg of EPS or 12 g of Cu(II) per g of EPS at pH 5, T = 25 °C, and incubation for 30 min.

Developing the Algorithm of Increasing the Destructive Potential of Pseudomonas putida SU12 Native Strain Extracted From Phenol-Contaminated Soils

The article presents the development of methodological approaches to increasing destructive potential of Pseudomonas putida SU12 native strain extracted from phenol-contaminated soils. The cyclic selective method on gradual increase of phenol concentration in optoelectronics environment in combination with intermediate stage of accumulative culture is described. The authors proposed a discrete, stepwise increase in the concentration of phenol in elective media depending on degree of its destruction.