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Malyshev V.L.,Mogilev State University of Food Technologies
Theoretical Foundations of Chemical Engineering

The evaporation of the liquid from porous materials under intense heat effect has been studied. The process of the formation of the surface film has been simulated. The capillary has been considered as a system of the confusor type with a decrease in the cross section of the mouth according to the diaphragm principle. © 2015, Pleiades Publishing, Ltd. Source

Garist I.V.,University of Rostock | Garist I.V.,Mogilev State University of Food Technologies | Verevkin S.P.,University of Rostock | Bara J.E.,University of Alabama | And 3 more authors.
Journal of Chemical and Engineering Data

Vapor pressures of 1-(n-alkyl)-benzimidazoles with chain lengths from methyl to pentyl (C 1-C 5) have been determined as a function of temperature by the transpiration method. From these data, the molar enthalpies of vaporization (Δ1 gH m) were calculated, and a linear correlation with the number of carbon atoms was found. At a given temperature, 1-n-alkylbenzimidazole vapor pressures were found to decrease with the increasing length of alkyl chain, and the fused ring system was found to lower vapor pressures and increase heats of vaporization relative to the corresponding 1-n-alkylimidazoles. © 2012 American Chemical Society. Source

Thornton M.,University of Missouri-St. Louis | Chickos J.,University of Missouri-St. Louis | Garist I.V.,University of Rostock | Garist I.V.,Mogilev State University of Food Technologies | And 5 more authors.
Journal of Chemical and Engineering Data

The vapor pressures of several aliphatic and phenyl substituted primary amines at T/K = 298.15 are measured by transpiration studies, and their vaporization enthalpies are calculated. The results were combined with compatible literature values to evaluate both the vaporization enthalpy and vapor pressure of (d)-amphetamine by correlation gas chromatography. The results are compared to existing values either estimated or measured for racemic amphetamine. Vaporization enthalpies and vapor pressures at T/K = 298.15 of the following were measured by transpiration (kJ·mol-1, p/Pa): 1-heptanamine, (49.75 ± 0.38, 291); 1-octanamine, (55.05 ± 0.29, 108); 1-decanamine, (64.94 ± 0.32, 12); benzylamine, (54.32 ± 0.32, 88); (dl)-α-methylbenzylamine, (55.26 ± 0.33, 82); 2-phenethylamine (57.51 ± 0.35, 43). The use of several of these materials as standards resulted in a vaporization enthalpy and vapor pressure for (d)-amphetamine at T/K = 298.15 of (58.2 ± 2.7) kJ mol-1 and (38 ± 12) Pa. © 2013 American Chemical Society. Source

Emel'Yanenko V.N.,University of Rostock | Verevkin S.P.,University of Rostock | Stepurko E.N.,Mogilev State University of Food Technologies | Roganov G.N.,Mogilev State University of Food Technologies
Russian Journal of Physical Chemistry A

The 11-undecanolide enthalpy of vaporization is obtained from the temperature dependence of the vapor pressure measured by transpiration. A conformational analysis of 8-octanolide (I), 11-undecanolide (II), and 13-tridecanolide (III) is performed. Quantum-chemical calculations are performed to study the moments of inertia, vibrational spectra, and most favorable conformations. The ideal gas thermodynamic properties of these compounds in the temperature range of 0-1500 K are determined. A procedure for the additive determination of polynomial coefficients for temperature-dependent properties is developed to assess the thermochemical data for lactones, lactides, and carboxylic hydroxyacids at 298.15-1000 K. © 2011 Pleiades Publishing, Ltd. Source

Matveichuk Yu.V.,Mogilev State University of Food Technologies | Rakhman'Ko E.M.,Belarussian State University | Yasinetskii V.V.,Mogilev State University of Food Technologies
Russian Journal of Inorganic Chemistry

Aqueous solutions of thiocyanates of divalent cations, Cd, Hg, Ni, Mn, Fe, Zn, and Co, were studied by IR spectrometry. It was found that Cd(II), Hg(II), Ni(II), and Fe(II) coordinate NCS- in the thiocyanate mode, Zn(II) coordination is in the isothiocyanate mode, and Co(II) and Mn(II) change the mode of coordination depending on the KNCS concentration in solution. The UV and visible spectra of solutions of d-metal thiocyanates were characterized. © 2015 Pleiades Publishing, Ltd. Source

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