Russian Journal of Physical Chemistry B - Aktuelle Forschungsartikel
Aktuelle Forschungsartikel: Physikalische Chemie
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Russian Journal of Physical Chemistry B - Verlag: Springer
Fokus auf Physik. Die Zeitschrift veröffentlicht Forschungs- und Übersichtsarbeiten zu allen Aspekte der chemischen Physik. Elementare chemische und physikalische Prozesse auf molekularer Ebene werden beschrieben.
Experiments in a constant-volume reactor and in a model rocket combustor demonstrated the possibility of convective burning
of mixtures of water with PAP-2 flaky aluminum powder with the formation of alumina and hydrogen. It was shown that the porosity
of the mixture is an important factor determining the mode of its burning. The burning occurred at a pressure of several hundred
atmospheres in the convective mode.
Content Type Journal Article
Category Combustion, Explosion, and Shock Waves
Pages 271-275
DOI 10.1134/S1990793112020030
Authors
A. A. Borisov, Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
P. V. Komissarov, Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
G. N. Sokolov, Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
The collisional destruction of negative ions close to the reaction threshold is considered using the delta-function model.
The dynamics of an electron and atoms is explicitly included in the Schrödinger equation. The use of an integral transformation
allowed the problem of solving the partial differential equation to be reduced to solving an ordinary second-order differential
equation. The forms of the spectrum of free electrons were found to be similar for two possible arrangements of quasi-molecule
terms. A generalization of the suggested approach was used in the problem of the interaction of one tilted term with a group
of parallel tilted terms in a quantum description of the motion of atoms. A simple equation was obtained which led to a correct
electron distribution exponential function.
Content Type Journal Article
Category Elementary Physicochemical Processes
Pages 181-187
DOI 10.1134/S1990793112020170
Authors
A. Z. Devdariani, St. Petersburg State University (Petrodvorets Branch), Universitetskii pr. 26, Petrodvorets, 198504 Russia
Yu. N. Demkov, St. Petersburg State University (Petrodvorets Branch), Universitetskii pr. 26, Petrodvorets, 198504 Russia
The symmetry group of an isotropic oscillator explaining additional degeneracy of its energy levels was for the first time
considered by Demkov [1–3]. He directed attention to the fact that harmonic oscillator Hamiltonian symmetry was beyond the
scope of usual geometric concepts and could be expressed using canonical transformations relating coordinates and momenta.
We show in this paper how the symmetry properties of the harmonic oscillator Hamiltonian can be used to solve the dynamic
problem of an oscillator in a uniform force field.
Content Type Journal Article
Category Elementary Physicochemical Processes
Pages 205-209
DOI 10.1134/S1990793112020248
Authors
E. D. Trifonov, Herzen State Pedagogical University, St. Petersburg, 191186 Russia
An effective numerical method for solving the inverse quantum scattering problem with a fixed angular momentum is suggested.
The method is based on combining the variable boundary method suggested earlier and the method of Bargmann potentials. Test
calculations are evidence of high method effectiveness in various particular cases, for instance, when there are bound states
and resonances.
Content Type Journal Article
Category Elementary Physicochemical Processes
Pages 210-217
DOI 10.1134/S1990793112020145
Authors
D. I. Abramov, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199164 Russia
V. S. Mar’yasin, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199164 Russia
The results of measurements of the physicochemical forms of ?-emitters formed by high-temperature dispersion of the fuel and
the material and construction elements adjacent to the reactor during the Chernobyl accident on April 26, 1986 are report.
Measurements were performed in May 1986 with the help of low-background nitrocellulose track detectors developed in 1985 and
produced at the Institute of Chemical Physics of the USSR Academy of Sciences. The fraction of the aggregate form was found
to decrease in the direction from the Chernobyl NPP to the city of Kiev, to a level characteristic of the dispersed component
at a distance of 100 km from the plant. The ?-radioactivity of various objects, such as biota, soil, surfaces of buildings
and industrial installations, was assessed. The distribution of ?-activity of microparticles was demonstrated to be closely
described by the lognormal function.
Content Type Journal Article
Category Chemical Physics of Ecological Processes
Pages 293-300
DOI 10.1134/S199079311202011X
Authors
S. V. Stovbun, Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
L. L. Kashkarov, Vernadskii Institute of Geochemistry and Analytical Chemistry, Moscow, Russia
A. I. Mikhailov, Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
V. I. Gol’danskii, Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
A. D. Kuntsevich, Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
For identical particles, consisting of fermions, the upper bound for the number of particles that can occupy a single state
is determined. In the macroscopic case, it is proportional to the square root of the number of possible ways of formation
of particles of a given composition of all fermions present in the mixture (the normalization constant of the respective density
matrix). Particles capable of accumulating in macroscopic quantities in one state can consist only of an even number of fermions
of different kinds. In the case of atoms in a trap, this bound can approach arbitrarily close to the total number of atoms.
Since the state of the centers of mass of the atoms is described by a symmetric wave function, they, like elementary bosons,
can form a condensate, the coherence properties of the components of which are characterized by an antisymmetric wave function
of a single atom in relative coordinates.
Content Type Journal Article
Category Elementary Physicochemical Processes
Pages 188-198
DOI 10.1134/S1990793112020212
Authors
M. M. Mestechkin, 12773 Seabreeze Farms Dr. # 33, San Diego, CA 92130, USA
A model of a flow ideal mixing reactor for a consecutive two-stage exothermic first-order reaction was considered. The presence
of a region of multiplicity of stationary states was established. This multiplicity region can contain regions of three and
five stationary states; the region of five states always appears inside the region of three stationary states. Changes in
the type of stationary state stability in each of these regions are analyzed. Numerical calculations of phase trajectories
in the regions of stationary state stability and instability were performed. A mechanism of the creation of a stable limiting
cycle was suggested for the case of three stationary states.
Content Type Journal Article
Category Kinetics and Mechanism of Chemical Reactions. Catalysis
Pages 254-260
DOI 10.1134/S1990793112020029
Authors
Z. S. Andrianova, Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, Russia
E. V. Deyun, Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, Russia
L. V. Kustova, Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, Russia
N. G. Samoilenko, Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, Russia
For a model problem the solution to which describes the main features of changes in the parameters of the medium in the detonation
of an unconfined gas mixture charge of in the air, direct numerical simulation, without of simplifying assumptions on changes
in the composition of the mixture, was performed to study changes in the composition of the detonation products, determine
the limits of applicability of the chemical equilibrium mixture model, and verify a previously obtained sufficient condition
of applicability of the chemical equilibrium mixture model. The results of determining the limits of applicability of the
chemical equilibrium mixture model previously obtained using an approximate method were confirmed.
Content Type Journal Article
Category Combustion, Explosion, and Shock Waves
Pages 261-270
DOI 10.1134/S1990793112020042
Authors
U. F. Bryakina, National Research Nuclear University “MEPhI”, Moscow, Russia
S. A. Gubin, National Research Nuclear University “MEPhI”, Moscow, Russia
V. A. Shargatov, National Research Nuclear University “MEPhI”, Moscow, Russia
A. V. Lyubimov, National Research Nuclear University “MEPhI”, Moscow, Russia
Whether bound states of Coulomb systems composed of four particles with unit charges (quadrions), a+b+c?d?, exist is demonstrated to be determined by the masses of the constituent particles. Relations that make it possible to establish
the existence of a large number quadrions with different masses of the particles are derived. The energies of reference quadrions
of different symmetry, a positronium molecule, a+a+a?a?, a+b+a?b?, a+b+a?b?, and a+a+b?c?, are determined and groups of stable asymmetric quadrions corresponding to them are identified. A relationship between the
stability of a number of quadrions and three-particle systems (trions) was found. The results shows that, among all the 406
four-particle independent combinations of electrons, muons, pions, kaons, protons, deuterons, and tritium nuclei or their
antiparticles, there are 227 bound quadrions.
Content Type Journal Article
Category Elementary Physicochemical Processes
Pages 199-204
DOI 10.1134/S1990793112020224
Authors
T. K. Rebane, Fock Institute of Physics, St. Petersburg State University, St. Petersburg, Russia
A simple experiment transparent for interpretation is presented in which afterglow of a discharge in helium with a small admixture
of neon was studied. The intensities of the spectral lines of the Ne* atom at the stage of plasma decay were analyzed to find
the conditions under which the dissociative recombination of heteronuclear ions HeNe+ + e ? He + Ne* played a predominant role in the formation of part of the after-glow spectrum. The absolute values of partial
coefficients responsible for the formation of excited neon atoms in the 2p53p configuration were determined.
Content Type Journal Article
Category Elementary Physicochemical Processes
Pages 234-238
DOI 10.1134/S1990793112020182
Authors
V. A. Ivanov, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199164 Russia
Yu. E. Skoblo, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199164 Russia
Nonadiabatic transitions of two types: (1) between discrete states and (2) between discrete and continuous spectrum states
were considered for the detachment of a negative hydrogen ion in collisions with a hydrogen molecule. It was shown for the
example of collinear collisions that, at low collision energies, the mechanism of the process was related to the quasi-stationary
character of the ground electronic state of the quasi-molecule, whereas the mechanism related to the quasi-stationary character
of the first excited state became noticeable as the energy of collisions increased.
Content Type Journal Article
Category Elementary Physicochemical Processes
Pages 229-233
DOI 10.1134/S1990793112020157
Authors
A. K. Belyaev, Herzen State Pedagogical University, St. Petersburg, 191186 Russia
A. I. Toropkin, Herzen State Pedagogical University, St. Petersburg, 191186 Russia
A. S. Tyukanov, Herzen State Pedagogical University, St. Petersburg, 191186 Russia
Transient current curves were recorded for polystyrene and polycarbonate doped with 15 wt % tritolylamine using both surface
and volume charge carrier generation. The multiple trapping model was used to perform numerical calculations of time-of-flight
curves for the published Gaussian disorder model parameters. The calculation results were compared with the experimental data.
It was shown that the experimental and calculated curves satisfactorily coincided. The flat plateau observed in time-of-flight
curves should not be associated with the establishment of a quasi-equilibrium transport regime.
Content Type Journal Article
Category Chemical Physics of Polymer Materials
Pages 315-320
DOI 10.1134/S1990793112020121
Authors
A. P. Tyutnev, Moscow State Institute of Electronics and Mathematics (Technical University), Moscow, Russia
R. Sh. Ikhsanov, Moscow State Institute of Electronics and Mathematics (Technical University), Moscow, Russia
V. S. Saenko, Moscow State Institute of Electronics and Mathematics (Technical University), Moscow, Russia
E. D. Pozhidaev, Moscow State Institute of Electronics and Mathematics (Technical University), Moscow, Russia
Heavy ion collisions U92+-U91+(1s) at a 6 MeV incident particle energy per nucleon are considered. The wave function of the electron was determined by solving
the Dirac time-dependent equation in a central field, which is the sum of the potential of the target nucleus and the potential
of the incident nucleus taken in the monopole approximation. The Dirac equation was solved using the basis set of Hermitian
B-splines. The probabilities of remaining in the 1s target state were calculated as functions of the impact parameter.
Content Type Journal Article
Category Elementary Physicochemical Processes
Pages 224-228
DOI 10.1134/S1990793112020169
Authors
G. B. Deineka, St. Petersburg State University of Information Mechanics and Optics Technologies, St. Petersburg, Russia
I. A. Mal’tsev, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199164 Russia
I. I. Tupitsyn, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199164 Russia
V. M. Shabaev, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199164 Russia
G. Plunien, Institut für Teoretische Physik, Technische Universität Dresden, Dresden, Germany
The Coulomb glory effect in the back scattering of antiprotons with energies of from 100 eV to 3 keV from a bare nucleus of
uranium and from uranium ions with closed shells is considered in terms of nonrelativistic and relativistic quantum theory.
The appearance of Coulomb glory in collisions with multiply charged ions is caused by nucleus charge screening by filled electron
shells. In scattering from a bare nucleus, the effect appears because of the screening properties of the vacuum polarization
potential.
Content Type Journal Article
Category Elementary Physicochemical Processes
Pages 218-223
DOI 10.1134/S1990793112020200
Authors
A. V. Maiorova, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199164 Russia
D. A. Tel’nov, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199164 Russia
V. M. Shabaev, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199164 Russia
V. A. Zaitsev, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199164 Russia
I. I. Tupitsyn, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199164 Russia
G. Plunien, Institut für Teoretische Physik, Technische Universit@at, Dresden, Germany
T. Stöhlker, Gesellschaft für Schwerionenforschung, Darmstadt, Germany
The probabilities of “hot” electronic transitions for inertial (Gauss correlation function) and diffusion (exponential correlation
function) polar solvent relaxation modes were calculated. It was shown that the probabilities of transitions for inertial
and diffusion relaxation could differ by two-three times. The possibility and conditions of the replacement of the inertial
by diffusion relaxation component were studied in the simulation of electronic transition kinetics in real solvents.
Content Type Journal Article
Category Elementary Physicochemical Processes
Pages 175-180
DOI 10.1134/S1990793112020066
Authors
A. O. Kichigina, Volgograd State University, Universitetskaya ul. 100, Volgograd, 400062 Russia
A. I. Ivanov, Volgograd State University, Universitetskaya ul. 100, Volgograd, 400062 Russia
A concept of design of computational experiment in combustion theory, including the construction, qualitative and numerical
analysis of mathematical models, as well as analysis of their adequacy in accordance with the classification of Academician
A.G. Merzhanov, is formulated.
Content Type Journal Article
Category Combustion, Explosion, and Shock Waves
Pages 289-292
DOI 10.1134/S1990793112020054
Authors
V. I. Bykov, Mendeleyev University of Chemical Technology of Russia, Moscow, Russia
A version of calculation of the transition probability in a quantum system based on the representation of the transition probabilities
in the form of a path integral and its evaluation by the saddle-point method for part of the variables. Some problems associated
with the analytic continuation of the integrand are discussed. The proposed approach is compared to related methods widely
used in chemical physics.
Content Type Journal Article
Category Elementary Physicochemical Processes
Pages 249-253
DOI 10.1134/S1990793112020236
Authors
V. V. Smirnov, Faculty of Physics, St. Petersburg State University, St. Petersburg, Russia
A statistical analysis of all the available data on the wave numbers of spectral lines related to triplet-triplet electronic-vibrational-rotational
(rovibronic) radiation transitions into the H2 molecule (1s?2s?) a3?g+ electronic state was performed for the first time. This allowed us to check and refine the controversial identification of
several spectral lines. Optimum rovibronic term values were found for 15 electronic states, including the (4p?)f3?u+, (4p?)k3?u+, and (4p?)k3?u? states studied in this work. The ratios between the oscillator strengths of R- and P-branch lines with common upper levels (branching coefficients) for the f3?u+ ? a3?g+ and k3?u+ ? a3?g+ systems of H2 molecule bands were measured for the first time. Substantial deviations of the measured branching coefficients from the corresponding
ratios between the Henl-London factors were observed. The deviations monotonically increased as the rotational quantum number
N grew, which, in combination with substantial ?-doubling in the k3?u state, was evidence of an important role played by electronicrotational interaction in the 4p?3?u+ and 4p?3?u+ adiabatic electronic states. A strong correlation was observed between the N dependences of branching coefficients for transitions from the mutually perturbed f3?u+ and k3?u+ electronic states. The results of this work show that the measured branching coefficients are a much more sensitive and capacious
channel of information about perturbation effects than rovibronic term values.
Content Type Journal Article
Category Elementary Physicochemical Processes
Pages 239-248
DOI 10.1134/S1990793112020194
Authors
B. P. Lavrov, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199164 Russia
Although OH uptake by carbonaceous surfaces is very efficient, it is thought to be negligible to affect the OH and O3 balance in the lower troposphere. To estimate its contribution in the upper troposphere, we have studied the temperature
dependence of OH uptake by carbonaceous surfaces of atmospheric importance over the temperature range from 218 to 298 K. We
found that the OH uptake coefficient is weakly dependent of temperature, ranging from 0.1 to 1, as was measured under flow
conditions using chemical ionization mass spectrometry. This finding was further used to estimate OH loss on carbonaceous
aerosol under upper tropospheric conditions. Our calculations suggested that OH heterogeneous loss may represent a notable
sink for OH in the upper troposphere, which is due to both the significantly lower diffusion limitation and weakly temperature-dependent
OH uptake. The obtained results may be thus important for aerosol chemistry of the upper troposphere.
Content Type Journal Article
Category Chemical Physics of Atmospheric Phenomena
Pages 327-332
DOI 10.1134/S199079311202008X
Authors
Yong Liu, University of Colorado, Denver, CO, USA
A. V. Ivanov, Department of Chemistry and Biochemistry, University of California-San Diego, La Jolla, CA 92093, USA
V. V. Zelenov, Institute for Energy Problems of Chemical Physics (Branch), Russian Academy of Sciences, Chernogolovka, Russia
M. J. Molina, Department of Chemistry and Biochemistry, University of California-San Diego, La Jolla, CA 92093, USA
The influence of hexylresorcinol on the structure, equilibrium fluctuations, and functional activity of water-soluble enzyme
lysozyme was studied over a wide range of hexylresorcinol concentrations. Hexylresorcinol was found to be not only a stabilizer
of lysozyme. At low hexylresorcinol concentrations (2 to 10 molecules per lysozyme globule), the activity of lysozyme sharply
increased; activity began to decrease as the concentration grew. The influence of hexylresorcinol on the structural, dynamic,
and functional lysozyme characteristics is well described by models of preferential hydration and preferential protein interaction
with hexylresorcinol. The hexylresorcinol molecule consists of hydrophobic (alkyl radical) and hydrophilic (aromatic nucleus)
moieties, which has additional regulatory action on the functional activity of lysozyme. As the concentration of hexylresorcinol
increases, the effect of regions with preferential hydration begins to noticeably predominate over the effect of preferential
interaction with hexylresorcinol. At hexylresorcinol concentrations higher than 100 molecules per lysozyme globule, the activity
of lysozyme is fully inhibited. This is caused by the preferential hydration of the protein with the displacement of hexylresorcinol
from direct contacts with it. The displacement of hexylresorcinol causes the formation of high-density hexylresorcinol micelles.
Dense micelles interfere with the approach of substrates to the protein and fully inhibit its functional activity. The complete
inhibition of lysozyme activity occurs at hexylresorcinol concentrations lower by an order of magnitude than glycerol inhibiting
concentrations.
Content Type Journal Article
Category Dynamics of Transport Processes
Pages 301-314
DOI 10.1134/S1990793112020078
Authors
Yu. F. Krupyanskii, Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, Russia
E. G. Abdulnasyrov, Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, Russia
N. G. Loiko, Winogradsky Institute of Microbiology, Russian Academy of Sciences, Moscow, Russia
A. S. Stepanov, Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, Russia
K. B. Tereshkina, Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, Russia
G. I. El’-Registan, Winogradsky Institute of Microbiology, Russian Academy of Sciences, Moscow, Russia
A model of the multiple adsorption of atomic hydrogen on the surface of single-walled carbon nanotubes of the zigzag and arm-chair
types was constructed. The adsorption model is based on the Anderson periodic model. An analytic equation for the band structure
of carbon nanotubes with adsorbed hydrogen atoms was obtained, and the special features of this structure were studied. The
dependence of the band structure of carbon nanotubes on the concentration of adsorbed hydrogen atoms was analyzed. The model
constructed can be used to study adsorption of other univalent atoms on the surface of carbon particles.
Content Type Journal Article
Category Chemical Physics of Nanomaterials
Pages 321-326
DOI 10.1134/S1990793112020091
Authors
A. V. Pak, Volgograd State University, Vtoraya Prodol’naya ul. 30, Volgograd, 400062 Russia
N. G. Lebedev, Volgograd State University, Vtoraya Prodol’naya ul. 30, Volgograd, 400062 Russia
The aim of this work is to apply three-dimensional numerical simulation to determining the conditions of the stable operation
of the rotating-detonation chamber (RDC), the thermal state of the chamber walls, as well as the most important parameters
of the flow at the inlet and outlet, keeping in mind the possibility of placing the RDC between a compressor and a turbine
in a prospective gas turbine installation. The model is based on a system of three-dimensional unsteady Reynolds-averaged
Navier-Stokes, energy, and species conservation equations for a multicomponent reacting gas mixture supplemented by a turbulence
model. The system is solved using a combined algorithm based on the finite-volume and particle methods. The capabilities of
the computer program are demonstrated by the example of a circular RDC with inner and outer walls 260 and 306 mm in diameter
and with axial introduction of a hydrogen-air mixture through an annular gap at the bottom of the chamber (with a relative
area of 0.6). The detonation wave spun over the bottom at a frequency of ?126000 rpm. Calculations have shown that such an
RDC can operate in a steady mode with one detonation wave.
Content Type Journal Article
Category Combustion, Explosion, and Shock Waves
Pages 276-288
DOI 10.1134/S1990793112010071
Authors
S. M. Frolov, Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
A. V. Dubrovskii, Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
V. S. Ivanov, Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
The special features of the generation of microwave radiation by a high-power air explosion accompanied by ionizing radiation
are discussed. Coherent pulse caused by asymmetry of the ejection of gamma quanta from a source, incoherent bremsstrahlung
of a partially ionized plasma, incoherent radiation of the shock wave front, and radiation in spectral lines lying inside
air transparency windows are considered.
Content Type Journal Article
Category Effect of External Factors on Physicochemical Transformations
Pages 109-111
DOI 10.1134/S1990793112010198
Authors
Yu. B. Kotov, Keldysh Institute of Applied Mathematics, Russian Academy of Sciences, Miusskaya pl. 4, Moscow, 125047 Russia
V. D. Popov, Moscow State Institute of Engineering Physics (National Research Nuclear University), Kashirskoe sh. 31, Moscow, 115409 Russia
T. A. Semenova, Moscow State Institute of Engineering Physics (National Research Nuclear University), Kashirskoe sh. 31, Moscow, 115409 Russia
V. F. Fedorov, Moscow State Institute of Engineering Physics (National Research Nuclear University), Kashirskoe sh. 31, Moscow, 115409 Russia
Processes of cell commutation via anisometric supramolecular structures (strings) are considered in vitro and using physicochemical
models of lipids and trifluoroacetylated amino alcohols. The biological effectiveness of commutation via strings is demonstrated
to be higher compared to the diffusion mechanism of transfer of biologically active molecules over distances between objects
typical of populations of microorganisms. A kinetic model of strings is developed, and the rate of signal transmission in
such systems is estimated. It is shown that the condition of the chirality of lipids forming the biomembranes of cells follows
from the experimentally observed cell commutation by means of supramolecular anisometric structures.
Content Type Journal Article
Category Chemical Physics of Biological Processes
Pages 60-64
DOI 10.1134/S1990793112010137
Authors
S. V. Stovbun, Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
A. I. Mikhailov, Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
A. A. Skoblin, Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
E. E. Bragina, Belozersky Institute of Physicochemical Biology, Moscow State University, Moscow, Russia
M. A. Gomberg, Moscow State Medical Stomatological University, Moscow, Russia
It is shown that consideration of the heating rate-temperature dependence, an analysis of self-heating for first-order exothermic
reactions, and strict inclusion of kinetic deceleration puts forward fresh ideas about the diversity of reaction regimes on
the Todes criterion-Semenov criterion parameter plane. From this point of view, classic Semenov theory is a particular case
of the projection of two-dimensional regions onto the direction of Semenov criterion changes. An analysis of the mutual arrangement
of reaction region boundaries with different kinetics and the shape of the representation point movement trajectory when the
initial temperature of the system changed allowed us to determine the thermal explosion degeneration region, transition region,
and regions of possible explosive reaction modes.
Content Type Journal Article
Category Combustion, Explosion, and Shock Waves
Pages 52-59
DOI 10.1134/S199079311201006X
Authors
V. Yu. Filimonov, Altai State Technical University, pr. Lenina 46, Barnaul, 656038 Russia
The relationship between the structure and the kinetics of the thermal oxidation of the poly(3-hydroxybutyrate) — ethylene
propylene rubber and polyethylene — poly(3-hydroxybutyrate) systems is studied. For the first system containing 30–50 wt %
poly(3-hydroxybutyrate), phase inversion is observed, which affects its reactivity. For the compositions with polyethylene,
two stages of oxidation manifest themselves: before and after poly(3-hydroxybutyrate) degradation.
Content Type Journal Article
Category Kinetics and Mechanism of Chemical Reactions. Catalysis
Pages 38-41
DOI 10.1134/S1990793112010149
Authors
Yu. V. Tertyshnaya, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, 119991 Russia
L. S. Shibryaeva, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, 119991 Russia
A. A. Popov, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, 119991 Russia
The modern concepts of detonation processes in condensed systems are analyzed. A theoretical explanation of processes basic
to nonthermal explosive solid-state transformations at a high pressure suggested earlier allows a deep analogy between these
processes and processes at the activation detonation wave stage that occur inside its shock fore front and in its immediate
vicinity to be established.
Content Type Journal Article
Category Combustion, Explosion, and Shock Waves
Pages 48-51
DOI 10.1134/S1990793112010022
Authors
S. K. Aslanov, Mechnikov National University, Odessa, 65026 Ukraine
The parameters of radio radiation generated in an air medium by an electron beam from a RELUS-1 small electron accelerator
(Radiation Acceleration Center, MIFI) were studied theoretically and experimentally. Theoretical models for the generation
of electromagnetic fields over the frequency range 10–3000 MHz induced by an electron beam were developed and studied. Electromagnetic
fields from a beam of electrons were recorded over the frequency ranges 140–160 and 2794–2804. The discrepancy between theoretical
estimates and recorded values was less than 50%.
Content Type Journal Article
Category Effect of External Factors on Physicochemical Transformations
Pages 100-108
DOI 10.1134/S1990793112010174
Authors
L. S. Chudnovskii, Open Joint-Stock Company, Scientific-Industrial Corporation “Systems for Precision Instrument Making”, Moscow, Russia
K. S. Mozgov, Open Joint-Stock Company, Scientific-Industrial Corporation “Systems for Precision Instrument Making”, Moscow, Russia
B. Yu. Bogdanovich, Moscow State Institute of Engineering Physics (National Research Nuclear University), Kashirskoe sh. 31, Moscow, 115409 Russia
A. V. Nesterovich, Moscow State Institute of Engineering Physics (National Research Nuclear University), Kashirskoe sh. 31, Moscow, 115409 Russia
S. A. Panov, Central Scientific Research Institute of the Ministry of Defense, Moscow, Russian Federation
Yu. I. Neryabov, Central Scientific Research Institute of the Ministry of Defense, Moscow, Russian Federation
The reactive dynamics of the H + DCl reaction was studied by the wave-packet method at an arbitrary total angular momentum.
Two reaction channels (exchange and abstraction) are considered. The reaction cross sections calculated depending on collision
energies up to 2.5 eV and initial states of the DCl molecule remain unchanged for the rotational levels j0 = 0, 1, 4 at a vibrational level v0 = 0. The reaction threshold and cross section agree with the known experimental data.
Content Type Journal Article
Category Elementary Physicochemical Processes
Pages 1-4
DOI 10.1134/S1990793111060182
Authors
D. P. Babyuk, Yurii Fed’kovych Chernivtsi National University, ul. Kotsubins’kogo 2, Chernivtsi, 58012 Ukraine
V. V. Nechiporuk, Yurii Fed’kovych Chernivtsi National University, ul. Kotsubins’kogo 2, Chernivtsi, 58012 Ukraine
A counterflow reactor model for a system of two phases one of which involves an exothermic bimolecular reaction is considered.
At a stationary temperature distribution in the reactor, there are high and low heating regions. For the adiabatic case, maximum
heating is only possible at the bottom of the reactor. The maximum stationary temperature in the reactor decreases and shifts
toward the top of the reactor as the intensity of heat exchange with the environment increases.
Content Type Journal Article
Category Kinetics and Mechanism of Chemical Reactions. Catalysis
Pages 28-32
DOI 10.1134/S1990793112010058
Authors
E. V. Deyun, Institute of Problems in Physical Chemistry, Russian Academy of Sciences, Chrnogolovka, Moscow Oblast, 142432 Russia
B. L. Korsunskii, Institute of Problems in Physical Chemistry, Russian Academy of Sciences, Chrnogolovka, Moscow Oblast, 142432 Russia
N. G. Samoilenko, Institute of Problems in Physical Chemistry, Russian Academy of Sciences, Chrnogolovka, Moscow Oblast, 142432 Russia
Yu. N. Finaeva, Institute of Problems in Physical Chemistry, Russian Academy of Sciences, Chrnogolovka, Moscow Oblast, 142432 Russia
The mechanisms of deactivation of electronically excited products of decomposition of silver azide (nitrogen molecules) are
examined. A model of dipole interaction with the electron subsystem of the crystal is used to estimate the rate constants
of deactivation with formation of electron-hole pairs (?109 s?1) and energy transfer to a band hole (?10?12 cm3 s?1). The values obtained confirm the basic postulate underlying the models of solid-phase chain reactions: the preferential
formation of electronic excitations of the crystal lattice during the deactivation of excited decomposition products.
Content Type Journal Article
Category Elementary Physicochemical Processes
Pages 15-18
DOI 10.1134/S1990793112010101
Authors
V. G. Kriger, Kemerovo State University, Kemerovo, Russia
A. V. Kalenskii, Kemerovo State University, Kemerovo, Russia
A. A. Zvekov, Kemerovo State University, Kemerovo, Russia
The catalytic oxidation of dodecane by air oxygen on a mixed vanadium-molybdenum oxide (V2O5 · MoO3, 40 mol % MoO3) was studied over the temperature range 300–350°C. The reaction at 300–330°C occurred on oxygen vacancies with the rupture
of C-H bonds and formation of ?-acid. Oxidation above 350°C occurred with the splitting of the C-C bond and formation of two
and more acids. Singlet oxygen 1O2 generated in the oxidation of oxide catalyst lattice oxygen participated in the reaction. A possible mechanism of the process
was considered.
Content Type Journal Article
Category Effect of External Factors on Physicochemical Transformations
Pages 169-172
DOI 10.1134/S199079311201023X
Authors
P. A. Vakhrushin, Gubkin State University of Oil and Gas, Leninskii pr. 65, Moscow, 117917 Russia
M. V. Vishnetskaya, Gubkin State University of Oil and Gas, Leninskii pr. 65, Moscow, 117917 Russia
A. I. Kokorin, Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, Russia
Two qualitatively different approaches to the dynamics of vibrational wave packets in the presence of medium-induced relaxation,
with taking into account relaxation memory effects and without taking them into account (Makovian approximation) were compared
for a molecular system with one vibrational degree of freedom (the Morse oscillator) in a medium. The time evolution of the
populations of levels, mean system energy, and response of “pumping-probing” experiments were calculated. It was found that,
as distinct from the Markovian approximation, the approach including memory effects can predict the evolution of a molecular
system satisfying the detailed equilibrium principle. The two approaches specified also predict the existence of a qualitative
difference of phase characteristics in the behavior of the system at short times.
Content Type Journal Article
Category Effect of External Factors on Physicochemical Transformations
Pages 140-148
DOI 10.1134/S1990793112010216
Authors
A. S. Moskalenko, Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, Russia
S. Ya. Umanskii, Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, Russia
A new class of models of the chemical dynamics of closed systems, quasi-gradient models, is suggested. According to these
models, the evolution of a chemically reacting system to the equilibrium state occurs along a thermodynamic potential gradient
with an accuracy to a positive definite multiplier.
Content Type Journal Article
Category Kinetics and Mechanism of Chemical Reactions. Catalysis
Pages 33-37
DOI 10.1134/S1990793112010046
Authors
V. I. Bykov, Mendeleev University of Chemical Technology, Miusskaya pl. 9, Moscow, 125190 Russia
I. E. Starostin, Zhukovskii and Gagarin Air Force Academy, Moscow Oblast, Russia
An analytical study of the migration of an embedded impurity atom over a solid surface under the influence of the diffusion
of vacancies is performed. The case of small surface coverages of both vacancies and impurity atoms is considered. It is shown
that the realization of multiple collisions of a single impurity atom with vacancies imparts a Brownian character to its motion.
At long times, the dependence of the mean square displacement on the time differs little from the linear, whereas the spatial
density distribution is close to the Gaussian, features that makes it possible to introduce a diffusion coefficient. For the
latter, an analytical expression is derived, which differs from the product of the diffusion coefficient of vacancies and
their relative concentration only by a numerical factor. The dependence of the diffusion coefficient of an impurity atom on
the ratio of the frequency of its jumps to the frequency of jumps of vacancies is analyzed. In the kinetic mode, when the
frequency of jump ? of the imurity atom is small, the diffusion coefficient of the impurity depends linearly on ?, whereas
in the opposite case, a saturation occur and its dependence on the frequency of jumps of the impurity atom disappears.
Content Type Journal Article
Category Dynamics of Transport Processes
Pages 65-71
DOI 10.1134/S1990793112010113
Authors
A. S. Prostnev, Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, 119991 Russia
B. R. Shub, Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, 119991 Russia
Investigations on creation of a non-selfmaintained discharge based on electron beam from the electron accelerator EOL-400M
for impact on propane-air mixture have been made. Experiments on detection of some plasma and gas parameters have been realized.
Works on modeling of electron-molecule processes in propane-air mixture in external electric field and E-beam at different
values of stoichiometricity have been realized.
Content Type Journal Article
Category Effect of External Factors on Physicochemical Transformations
Pages 128-139
DOI 10.1134/S1990793112010162
Authors
N. V. Ardelyan, Moscow Radiotechnical Institute RAS, Moscow, Russia
V. L. Bychkov, Moscow Radiotechnical Institute RAS, Moscow, Russia
D. V. Bychkov, Moscow Radiotechnical Institute RAS, Moscow, Russia
S. V. Denisiuk, Moscow Radiotechnical Institute RAS, Moscow, Russia
K. V. Kosmachevskii, Moscow Radiotechnical Institute RAS, Moscow, Russia
Any of the infinite number of invariants of a binary collision of structureless particles was shown to annihilate the collision
integral written in the 12-dimensional phase space of two particles. Its own principal hydrodynamic value corresponds to each
of these invariants. The six-dimensional phase space of one particle can only accommodate three lower binary collision invariants
that allow the integral of collisions to be annihilated. The first equation of the Bogolybov-Born-Green-Kirkwood-Yvon hierarchy
is, however, not closed, and the transition from the 6-dimensional phase space to the hydrodynamic stage of description is
therefore closed. The Boltzmann hypothesis closes the kinetic equation and therefore opens up the possibility of approximate
transition to hydrodynamics. Just the Boltzmann hypothesis allows classic hydrodynamics equations constructed with the use
of only three lower principal hydrodynamic values to be substantiated statistically. It should be expected that the neglect
of the higher principal hydrodynamic values will limit the applicability range of classic hydrodynamics to states insignificantly
removed from the statistical equilibrium state. Most probably, just this limitation is responsible for obvious discrepancy
between the results of direct numerical integration of the Navier-Stokes equation and the experimental data on flows that
lost stability. The possibility of the improvement of classic hydrodynamics equations is sought on the way toward an increase
in the number of principal hydrodynamic values.
Content Type Journal Article
Category Effect of External Factors on Physicochemical Transformations
Pages 149-162
DOI 10.1134/S1990793112010204
Authors
I. V. Lebed’, Zhukovsky Central Institute of Aerohydrodynamics, Zhukovskii, Moscow Oblast, 140160 Russia
S. Ya. Umanskii, Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, Russia
The results of studies on the interaction of oxidized graphites and electroconductive materials with the electromagnetic radiation
of a microwave oven are presented. The effects of glow and expansion of oxidized graphites stimulated by microwave radiation
in air and an inert atmosphere are studied. Differences in the character of expansion of oxidized graphites and conductive
materials on a dielectric and metal substrate under the influence of electromagnetic radiation are examined.
Content Type Journal Article
Category Effect of External Factors on Physicochemical Transformations
Pages 19-27
DOI 10.1134/S1990793112010083
Authors
V. N. Gorshenev, Emmanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, Russia
An approach to analyzing experimental data on the size distribution and concentrations of atmospheric aerosol particles and
meteorological parameters by using the flicker-noise spectroscopy is proposed. This approach makes it possible to identify
the character of evolution of the measured parameters due to the processes underlying their variation, to trace the relationship
between measured quantities, and, based on this, to determine the mechanisms of interactions between aerosol particles and
gaseous components of the atmosphere. As an example, the behavior of the concentration, average particle size, and relative
humidity of the atmosphere is examined. Atmospheric measurements were carried out at the recreation center in Tishkovo (Moscow
Region). The proposed approach may prove useful in solving ecological and environmental problems.
Content Type Journal Article
Category Effect of External Factors on Physicochemical Transformations
Pages 89-99
DOI 10.1134/S1990793112010241
Authors
V. A. Zagainov, State Scientific Centre of the Russian Federation “Karpov Scientific and Research Institute of Physical Chemistry”, Moscow, Russia
S. F. Timashev, State Scientific Centre of the Russian Federation “Karpov Scientific and Research Institute of Physical Chemistry”, Moscow, Russia
Yu. G. Biryukov, State Scientific Centre of the Russian Federation “Karpov Scientific and Research Institute of Physical Chemistry”, Moscow, Russia
D. V. Vodyanik, State Scientific Centre of the Russian Federation “Karpov Scientific and Research Institute of Physical Chemistry”, Moscow, Russia
I. E. Agranovskii, State Scientific Centre of the Russian Federation “Karpov Scientific and Research Institute of Physical Chemistry”, Moscow, Russia
A. A. Lushnikov, State Scientific Centre of the Russian Federation “Karpov Scientific and Research Institute of Physical Chemistry”, Moscow, Russia
E. V. Zhukova, State Scientific Centre of the Russian Federation “Karpov Scientific and Research Institute of Physical Chemistry”, Moscow, Russia
V. V. Maksimenko, State Scientific Centre of the Russian Federation “Karpov Scientific and Research Institute of Physical Chemistry”, Moscow, Russia
N. S. Malyshev, Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
A complex study of the hydrogen reduction of nanosized iron hydroxide Fe(OH)3 at 400°C was performed. It was shown that, during the reduction of Fe(OH)3 to iron metal ?-Fe, intermediate compounds such as Fe(OH)2, ?-FeOOH, ?-FeOOH, ?-FeOOH, ?-FeOOH, and FeO are formed along with stable iron oxides ?-Fe2O3, ?-Fe2O3, and Fe3O4. A scheme of chemical and structural transformations that occur in the reduction of nanosized Fe(OH)3 is presented. The scheme takes into account the possibility of the bifurcation mechanism of reaction development.
Content Type Journal Article
Category Chemical Physics of Nanomaterials
Pages 81-88
DOI 10.1134/S1990793112010034
Authors
Yu. V. Baldokhin, Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, Russia
I. P. Suzdalev, Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, Russia
V. E. Prusakov, Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, Russia
D. A. Burnazyan, Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, Russia
V. P. Korneev, Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, Russia
L. V. Kovalenko, Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, Russia
G. E. Folmanis, Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, Russia
The influence of N2 and O2 molecules on spontaneous microwave radiation spectrum was studied over the decimeter range. This radiation appears in the
D and E upper earth atmosphere layers during strong magnetic storms. It was shown to be caused by radiation transitions between
medium-perturbed orbitally degenerate Rydberg atom and molecule states A** that occur without changes in the principal quantum
number, ?n = 0. The available experimental data were used to calculate the dependences of orbitally degenerate state populations on
the density of medium and electron flux and temperature. Effective radiation bands were constructed for transitions between
highly excited quasi-molecule levels A**N2 and A**O2. The emission spectrum was shown to be inhomogeneous and contain three frequency regions in which a noticeable decrease in
the intensity of radiation occurred. The physical reason for the formation of these regions was a shift of the emission spectra
of quasi-molecules containing unexcited N2 and O2 molecules. The frequency profiles of radiation intensity within these frequency regions were calculated as depending on the
storm level. Radiation profiles were shown to noticeably change as the storm level increased, they strongly increased close
to the right region edge corresponding to high transition frequencies. Nonmonotonic behavior of this profile in the middle
of the lower region was observed; this was related to emission spectrum inhomogeneity. A sharp increase in radiation intensity
as the magnetic storm level increased occurred in the region of frequencies situated close to the right edge of the upper
region (50–100 GHz), which was most interesting for biophysical studies of the action of microwave radiation on living organisms
during strong geomagnetic disturbances.
Content Type Journal Article
Category Effect of External Factors on Physicochemical Transformations
Pages 112-127
DOI 10.1134/S1990793112010186
Authors
G. V. Golubkov, Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, Russia
M. G. Golubkov, Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, Russia
M. I. Manzhelii, Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, Moscow, Russia
The EPR probe, DSC, and WARDX methods are applied to study the molecular dynamics and structure of 3-hydroxybutyrate-3-hydroxyvalerate
copolymer (PHBHV, 5 mol %) and its mixtures with segmented polyester urethane (SPEU) upon ozone oxidation and hydrothermal
treatment. It is shown that time-limited (3 and 5 h) treatment of the mixed compositions with water at 40°C has no noticeable
effect on the dynamics of rotation of the probe (EPR) and the crystallinity of PHBHV (DSC). However, hydrothermal treatment
at 70°C causes an increase in the molecular mobility of the probe in the system, accompanied, according to XRD and DSC analyses,
by increases in the degree of crystallinity and density of PHBHV crystallites. The temperature of fusion of mixed compositions
also increases. During ozonation, the mobility of the probe slows gradually in PHBHV all the time, whereas in mixed compositions,
a slowdown is observed only up to 3 h of oxidation time, after which, up to 5 h of ozonation, the mobility increases, along
with decreases in the fraction of the amorphous phase and in the density of the crystallites.
Content Type Journal Article
Category Chemical Physics of Polymer Materials
Pages 72-80
DOI 10.1134/S1990793112010095
Authors
S. G. Karpova, Emmanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, Russia
A. L. Iordanskii, Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
A. A. Popov, Emmanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, Russia
N. G. Shilkina, Emmanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, Russia
S. M. Lomakin, Emmanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, Russia
M. A. Shcherbin, Russian Scientific Center “Kurchatov Institute”, Moscow, Russia
S. N. Chvalun, Enikolopov Institute of Synthetic Polymer Materials, Russian Academy of Sciences, Moscow, Russia
A. A. Berlin, Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
The probability of the nonthermal transfer of an electron of an excited donor-acceptor complexes was calculated from the electron
coupling parameter within the framework of time-dependent perturbation theory. Using the analysis of the two first corrections
of the perturbation theory series for the standard spinboson model with the Debye spectral density of thermostat oscillators
as a basis, we revealed the structure of higher corrections. This allowed us to sum up the series and obtain a new analytical
expression distinct from the widely used Padé-approximation for the probability of the nonthermal transfer of an electron. The stochastic approach was shown to allow overestimation
of the probability of nonthermal electron transitions by 40.0% in the solvent-controlled regime.
Content Type Journal Article
Category Elementary Physicochemical Processes
Pages 5-14
DOI 10.1134/S1990793111060248
Authors
V. A. Mikhailova, Volgograd State University, Universitetskii pr. 100, Volgograd, 400062 Russia
A. I. Ivanov, Volgograd State University, Universitetskii pr. 100, Volgograd, 400062 Russia
The monodisperse magnetite nanoclusters 13–15 nm in size were synthesized and studied. The nanoclusters were stabilized in
colloid solution by means of surface-active-substance (SAS)—oleic acid in the presence, paraffin—docosane and separated from
each other by paraffin layers at the distance approximately ?3 nm. The first order magnetic phase transition was observed
in magnetite, when magnetization of a cluster disappears by jump at some critical temperature similar to that of the Curie
or Neel temperatures typical of the bulk material. The observed effect is explained by the influence of surface-induced defects
in the nanomagnetite. The developed surface of a cluster generates defects and causes surface tension. The model is proposed,
and transition from a paramagnetic to magnetic ordered (superparamagnetic) state of a cluster is found experimentally by applying
an external magnetic field which is more than some critical one. Nanomagnetite itself exists in a special “oxidized condition”,
which elementary cell is the same as in normal magnetite, but it contains only trivalent cations in a B-sublattice.
Content Type Journal Article
Category Effect of External Factors on Physicochemical Transformations
Pages 163-168
DOI 10.1134/S1990793112010228
Authors
I. P. Suzdalev, Semenov Institute of Chemical Physics RAS, Moscow, Russia
Yu. V. Maksimov, Semenov Institute of Chemical Physics RAS, Moscow, Russia
V. N. Buravtsev, Semenov Institute of Chemical Physics RAS, Moscow, Russia
V. K. Imshennik, Semenov Institute of Chemical Physics RAS, Moscow, Russia
S. V. Novichihin, Semenov Institute of Chemical Physics RAS, Moscow, Russia
V. V. Matveev, Semenov Institute of Chemical Physics RAS, Moscow, Russia
I. S. Lyubutin, Shubnikov Institute of Crystallography RAS, Moscow, Russia
Critical conditions for combustion failure due to heat loss to the environment are examined. The process of filtration combustion
is considered under conditions where a cellular structure of the front is realized, because the planar combustion front loses
its stability and splits into separate cells of exothermic chemical conversion, which propagate in self-sustained mode. The
size and structure of the cells of chemical interaction depend nonlinearly on the governing parameters, including the rate
of heat loss to the environment. Within the framework of a mathematical model of filtration combustion, the steady-state dynamics
of the combustion process and the structure of the cell of exothermic chemical reaction of a powder mixture with a gaseous
reagent with the formation of solid products are simulated. The specifics of the evolution of the cell before combustion failure
as a function of the heat loss rate are studied.
Content Type Journal Article
Category Combustion, Explosion, and Shock Waves
Pages 42-47
DOI 10.1134/S1990793112010125
Authors
K. G. Shkadinskii, Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432 Russia
A. N. Firsov, Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432 Russia
N. I. Ozerkovskaya, Institute of Structural Macrokinetics and Problems of Materials, Russian Academy of Science, Chernogolovka, Moscow Oblast, 142432 Russia
Supercritical carbon dioxide (SC-CO2) is used to prepare bioactive composites from powdered polylactide and nanosized hydroxyapatite for surface-selective laser
sintering of three-dimensional tissue engineering structures. The mixture of powdered polylactide and nanosized hydroxyapatite
and cannot be directly laser-sinter because of the impossibility of forming continuous filaments from sintered polymer particles.
The use of composite particles for sintering formed in SC-CO2 medium makes it possible to eliminate this shortcoming and to form continuous structures. Analysis of the composition and
mechanical tests of such structures showed that the sintered composite obtained is fairly uniform, without destruction centers,
capable of withstanding the same mechanical loads as the pure polymer, and therefore, suitable for use in tissue scaffold
engineering.
Content Type Journal Article
Pages 1253-1257
DOI 10.1134/S1990793111080045
Authors
E. N. Antonov, Institute of Laser and Information Technologies, Russian Academy of Science, Troitsk, Moscow oblast, Russia
S. A. Bochkova, Institute of Laser and Information Technologies, Russian Academy of Science, Troitsk, Moscow oblast, Russia
A. V. Popova, Institute of Laser and Information Technologies, Russian Academy of Science, Troitsk, Moscow oblast, Russia
This paper reports on our effort to study the possibility of comparing the original pharmaceuticals and their analogs (generics)
based on comparisons of the multidimensional profiles of impurities isolated from samples by supercritical fluid extraction
and liquid extraction and recorded by gas chromato-mass spectrometry (GC-MS) with electron ionization (EI) and atmospheric
pressure photochemical ionization (APPhCI). Using the suggested approach makes it possible to increase the number of recorded
impurities, to show that the pharmaceutical samples are authentic, and to compare the original pharmaceuticals and generics
according to their quality.
Content Type Journal Article
Pages 1245-1249
DOI 10.1134/S1990793111080094
Authors
A. I. Revel’skii, Faculty of Chemistry, Moscow State University, Moscow, Russia
I. N. Glazkov, Faculty of Chemistry, Moscow State University, Moscow, Russia
Yu. S. Yashin, Faculty of Chemistry, Moscow State University, Moscow, Russia
D. A. Chepelyanskii, Faculty of Chemistry, Moscow State University, Moscow, Russia
A. S. Samokhin, Faculty of Chemistry, Moscow State University, Moscow, Russia
D. A. Burmykin, Faculty of Chemistry, Moscow State University, Moscow, Russia
I. A. Revel’skii, Faculty of Chemistry, Moscow State University, Moscow, Russia
It is shown that cellulose can be acetylated with acetic anhydride in supercritical carbon dioxide in the absence of traditional
catalysts, toxic solvents, and dilutants. As substrates, three cellulose samples were tested: sulfite and sulfate cellulose
and cellulose obtained by low-temperature delignification in a supercritical carbon dioxide medium. The chemical composition
of the cellulose diacetate product is characterized.
Content Type Journal Article
Pages 1250-1252
DOI 10.1134/S1990793111080070
Authors
A. D. Ivakhnov, Institute of Theoretical and Applied Chemistry, Northern (Arctic) Federal University, Arkhangelsk, Russia
T. E. Skrebets, Institute of Theoretical and Applied Chemistry, Northern (Arctic) Federal University, Arkhangelsk, Russia
K. G. Bogolitsyn, Institute of Theoretical and Applied Chemistry, Northern (Arctic) Federal University, Arkhangelsk, Russia
The conditions for transition to a state of supercritical (SC) fluid in the hydrocarbons-water system are examined. A method
for thermochemical heating the productive stratum near the oil well involving the transition of the oil-water formation fluid
to the SC state (homogeneous, inseparable, and extremely fluid) is proposed. New chemical compositions, binary mixtures (BMs)
of nitrates of organic amines (organic nitrate) and initiators of their decomposition, capable of ensuring the transition
of the fluid to the supercritical state at the expense of high pressures and temperatures generated by rock pressure and heat
of the exothermic reaction of BM are tested. The effectiveness of the scheme of production of formation fluid in waterflooded
oil fields is assessed.
Content Type Journal Article
Pages 1240-1244
DOI 10.1134/S199079311108001X
Authors
E. N. Alexandrov, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, Russia
N. M. Kuznetsov, Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia
G. P. Brusova, Faculty of Chemistry, Moscow State University, Moscow, Russia
A. V. Shlyakhtin, Faculty of Chemistry, Moscow State University, Moscow, Russia
A. L. Petrov, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, Russia
V. Yu. Lidzhi-Goryaev, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, Russia
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