St Petersburg State Forestry Academy

Saint Petersburg, Russia

St Petersburg State Forestry Academy

Saint Petersburg, Russia

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Berestetskii A.O.,Russian Academy of Agricultural Sciences | Yuzikhin O.S.,Russian Academy of Agricultural Sciences | Katkova A.S.,St Petersburg State Forestry Academy | Dobrodumov A.V.,Russian Academy of Sciences | And 2 more authors.
Applied Biochemistry and Microbiology | Year: 2010

An individual substance (20 mg/l) exhibiting phytotoxic properties, which, on the basis its spectral characteristics, was identified as zinniol, was obtained from the fungus Alternaria cirsinoxia. The nonspecific activity of this phytotoxin, with respect to plants of different families, was demonstrated. The minimum concentration (200 μg/ml) at which zinniol damages creeping thistle leaves and the median inhibition concentration (IC50) for rat embryonic fibroblasts (264 μg/ml) were determined. © Pleiades Publishing, Inc., 2010.


Vigranenko Yu.T.,St Petersburg State Forestry Academy | De Vekki A.V.,National Research Institute of Petrochemical Processes | Ushakov V.M.,St Petersburg State Forestry Academy
Russian Journal of Physical Chemistry A | Year: 2011

The values of the variable component of chemical affinity (A-A 0) are calculated and the relation between W (a kinetic parameter) and A-A 0 (a thermodynamic parameter) are established on the basis of experimental data on rates of the hydroformylation reaction (W) of isobutylene catalyzed by cobalt hydrocar-bonyl, and of data on compositions of the gas and liquid phases of the reaction mixture. The linear phenom-enological relations of nonequilibrium thermodynamics are found to describe the dependence of W on A-A 0 quite well at a conversion level of isobutylene of ≥50%. © 2011 Pleiades Publishing, Ltd.


Shkol'nikov E.V.,St Petersburg State Forestry Academy
Russian Journal of Applied Chemistry | Year: 2010

Thermodynamic method was used to calculate, taking into account the formation of hydroxo complexes, the effect of the pH value on the molar solubility of M2O3 solid oxides and their hydrates at 25°C and the constants of acid-base equilibria in aqueous media for crystalline oxides and dissolved hydroxides M(OH)3, where M = As, Sb, Bi. © 2010 Pleiades Publishing, Ltd.


Shkol'nikov E.V.,St Petersburg State Forestry Academy
Russian Journal of Applied Chemistry | Year: 2011

The molar solubilities of solid oxides M2O3 and their hydrates at 25°C as functions of pH of aqueous media, as well as the acid-base equilibrium constants were calculated for crystalline oxides and dissolved M(OH)3 hydroxides, where M = Cr, Fe, Co, by the thermodynamic method, taking into account the formation of mono- and polynuclear hydroxo complexes. © 2011 Pleiades Publishing, Ltd.

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