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Bibik E.E.,St Petersburg State Technological Institute
Russian Journal of Applied Chemistry | Year: 2010

Conditions in which the mechanism of precision polishing, based on controlled oxidation of the metal surface and mechanical removal of the oxidation products with an abrasive suspension in its shear deformation by a polishing instrument, can be implemented are considered. © Pleiades Publishing, Ltd., 2010. Source


Chesnokov Yu.G.,St Petersburg State Technological Institute
Russian Journal of Applied Chemistry | Year: 2013

Deviations from the temperature-defect law that can be observed in heat exchange between a turbulent flow of a fluid or gas and the wall in a planar channel at a comparatively small values of the Reynolds and Prandtl numbers were studied. © 2013 Pleiades Publishing, Ltd. Source


Pevzner L.M.,St Petersburg State Technological Institute
Russian Journal of General Chemistry | Year: 2012

O,O-Diethyl (ethoxycarbonylfuryl)methanephosphonates are formylated with ethyl formate in the presence of sodium foil at the methylene group adjacent to phosphorus atom to form sodium salts of phosphonoacetic aldehyde. When the substituents in the furan ring are remote from one another, and also in the case of 3, 4-disubstituted isomer these salts in DMSO solution exist in the carbanion form. Anions of salts of (2-ethoxycarbonylfur-3-yl)phosphonoacetic aldehyde and the isomer with the reversed location of substituents in DMSO solution take part in the dynamic equilibrium between the carbanion and the enolate form. The alkylation of all salts obtained with allyl bromide and dimethyl sulfate proceeds exclusively at the oxygen to form a mixture of Z- and E-isomers of phosphorylated vinyl ethers. © 2012 Pleiades Publishing, Ltd. Source


Sigolaev Yu.F.,St Petersburg State Technological Institute | Semenov S.G.,Saint Petersburg State University | Belyakov A.V.,St Petersburg State Technological Institute
Russian Journal of General Chemistry | Year: 2013

By quantum-chemical calculations at the M06-2X/aug-cc-pVTZ level of theory geometrical parameters, dipole moments, polarizabilities, first hyperpolarizabilities and relative energies of the axial and equatorial conformers in gaseous phase were determined for 1-cyano-1-silacyclohexane, 1-tert-butyl-1-silacyclohexane, 1-tert-butyl-1-cyano-1-silacyclohexane, and 1-fluoro-1-silacyclohexane. For the cyano group and fluorine atom the axial position is more preferable whereas for tert-butyl group, equatorial one. Polarizabilities of conformers are similar but optical anisotropy of equatorial conformers of C5H10SiHCN and C5H 10SiH(t-Bu) molecules is much larger than that of axial conformers. Upon substitution in nitriles of C1 atom by Si atom the hyperpolarizability is many times increased. © 2013 Pleiades Publishing, Ltd. Source


Bibik E.E.,St Petersburg State Technological Institute | Semyachkov A.V.,St Petersburg State Technological Institute
Russian Journal of Applied Chemistry | Year: 2010

Results obtained in an experimental study of the coagulation kinetics of suspensions by the sedimentation method, a simulation of the sedimentation of coagulating suspensions, and data following from the known solutions to equations of coagulation kinetics are compared. © Pleiades Publishing, Ltd., 2010. Source

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