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Your search keyword '"Shuvalova, E. V."' showing total 33 results
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33 results on '"Shuvalova, E. V."'

10. Quantum Mechanical Model of Proton Transfer in a Fluctuating Potential Field of the Active Site of α-Chymotrypsin

Author

Grishanin, B. A., Romanovskii, Yu. M., Chikishev, A.Yu., Shuvalova, E. V., Beig, R., editor, Ehlers, J., editor, Frisch, U., editor, Hepp, K., editor, Hillebrandt, W., editor, Imboden, D., editor, Jaffe, R.L., editor, Kippenhahn, R., editor, Lipowsky, R., editor, Löhneysen, H.v., editor, Ojima, I., editor, Weidenmüller, H.A., editor, Wess, J., editor, Zittartz, J., editor, Freund, Jan A., editor, and Pöschel, Thorsten, editor

Published
2000
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28. Numerical Technique LEGAK-3D for Computation of 3D Time-Dependent Multicomponent Continuum Flows on Multiprocessor Systems.

Author

Bakhrakh, S. M., Velichko, S. V., Spiridonov, V. F., Avdeyev, P. A., Artamonov, M. V., Bakulina, E. A., Bezrukova, I. Yu., Borlyaev, V. V., Volodina, N. A., Naumov, A. O., Ogneva, N. E., Rezvova, T. V., Rezyapov, A. A., Starodubov, S. V., Taradai, I. Yu., Tikhonova, A. P., Tsiberev, K. V., Shanin, A. A., Shirshova, M. O., and Shuvalova, E. V.

Subjects
GRID computing, MULTIPROCESSORS, CONTINUUM mechanics, LAGRANGE equations, EQUATIONS of motion
Abstract

The paper presents the ideas of finite-difference Lagrangian-Eulerian technique LEGAK-3D for computation of time-dependent multicomponent continuum flows in 3D geometry. The specific feature of this technique is in the use of concentrations for multicomponent medium computations. The paper also describes main principles of this technique implementation on distributed-memory multiprocessor systems. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
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29. Numerical Simulation and Experimental Study of Coating Stabilizing Effect on Shear Instability Growth in Oblique Impact of Metal Slabs.

Author

Bakhralh, S. M., Volodina, N. A., Drennov, O. B., Goreva, T. A., Mikhailov, A. L., Nizovtsev, P. N., Spiridonov, V. F., and Shuvalova, E. V.

Subjects
IMPACT (Mechanics), DYNAMIC testing of materials, CONSTRUCTION slabs, SURFACE coatings, INTERFACES (Physical sciences), PERTURBATION theory, APPROXIMATION theory
Abstract

Results of numerical simulations of the interface coating influence on the shear instability growth in oblique collision of metal slabs are presented. The state of materials was described in the elastic-plastic approximation. The dependence of the perturbation amplitude on the coating thickness and behavior were studied. The computations were conducted on a multiprocessor distributed-memory computer. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
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30. [Sorption of phthalocyanine dye by erythrocyte membranes in buffered solutions of different tonicities].

Author

Kirpichnikova KM and Shuvalova EV

Subjects
Absorption, Buffers, Erythrocyte Membrane drug effects, Humans, Membrane Proteins metabolism, Protein Binding drug effects, Solutions, Coloring Agents pharmacokinetics, Erythrocyte Membrane metabolism, Metalloporphyrins pharmacokinetics
Abstract

The sorption of nonpenetrating vital phthalocyanine dye--Heliogen Blue (HB) into the cells was studied on the human red cells incubated in hypertonic, isotonic and hypotonic solutions. The alteration in the outer membrane surface was detected using the monomer-dimer ratio (M/D) deduced from the absorbtion spectra of the sorbed dye, and the concentration (C) of the dye in membrane. The decrease in M/D and C was found in hypotonic and hypertonic conditions, resp. The increase in the number of binding sites caused by conformational changes in membrane is discussed.

Published
1988

31. [Use of phthalocyanine dye in spectroscopic research on the erythrocyte membrane with altered peripheral protein composition].

Author

Shuvalova EV and Kirpichnikova KM

Subjects
Absorption, Blood Proteins analysis, Edetic Acid pharmacology, Erythrocyte Membrane analysis, Erythrocyte Membrane metabolism, Humans, Membrane Proteins analysis, Protein Binding drug effects, Sodium Hydroxide pharmacology, Spectrophotometry, Infrared, Staining and Labeling methods, Trypsin pharmacology, Blood Proteins metabolism, Coloring Agents, Erythrocyte Membrane drug effects, Membrane Proteins metabolism, Metalloporphyrins
Abstract

The absorption spectra of Heliogen Blue (HB) dye were registered on stained ghosts of human red blood cells. The monomer-dimer ratio (M/D) was used as a characteristic of the absorbtion band of HB in the red spectral region. It is determined that incubation of ghosts in the sodium hydrate solution (pH 12) leads to changes in the visible HB spectrum. When the ghosts are stained after NaOH treatment, the M/D value decreases. When stained ghosts are treated with NaOH, the M/D value increases. The decrease in M/D value is due to the increase in HB sorption capacity of the modified membranes; the increase in M/D value is due to the removal of proteins sorbing HB. The appearance of additional sites for HB sorption and the decrease in M/D value in the HB spectrum may be explained by a conformational alteration of the integral proteins or by substitution of some molecules of the peripheral proteins for the HB molecules.

Published
1988

32. [Spectrophotometric study of intact and trypsin-treated erythrocyte membranes using a phthalocyanine dye].

Author

Kirpichnikova KM and Shuvalova EV

Subjects
Absorption, Buffers, Coloring Agents analysis, Erythrocyte Membrane analysis, Erythrocyte Membrane metabolism, Humans, Protein Binding drug effects, Spectrophotometry, Temperature, Trypsin analysis, Coloring Agents pharmacology, Erythrocyte Membrane drug effects, Trypsin pharmacology
Abstract

The sorption of vital phthalocyanine dye--Heliogen Blue (HB)--by red cells and their ghosts after trypsin treatment has been studied. The structural alteration in the outer and inner surface of the membrane was detected using the monomer-dimer ratio (M/D) deduced from the absorption spectra of the sorbed dye. The trypsin treatment causes the increase in the M/D ratio. It is greater (44%) when both the membrane surfaces are exposed to trypsin (unsealed ghosts), and is only 19% when the whole erythrocytes are treated. The similar alteration (M/D increased by 18%) is obtained for red blood cells stained after incubation in the isotonic buffer solution at 37 degrees C. Recent findings show a good agreement with our previous data on the influence of changes in the membrane surface on the value of the M/D ratio. A possibility of using HB in determination of structural changes of a native membrane is discussed.

Published
1984

33. [Spectrophotometric study of the surface of human erythrocytes and their ghosts by using a phthalocyanine dye].

Author

Kirpichnikova KM, Levin SV, and Shuvalova EV

Subjects
Adsorption, Copper analysis, Humans, Indoles analysis, Staining and Labeling methods, Surface Properties, Erythrocyte Membrane analysis, Erythrocytes analysis, Metalloporphyrins analysis, Spectrophotometry methods
Abstract

Human intact erythrocytes and their ghosts (resealed and unresealed) were stained by the vital dye Heliogen Blue, which does not penetrate the cell being only sorbed by its membrane. The absorption spectra of the sorbed dye were examined. On the external surface of the membrane, the molecular (monomer) state of dye sorption is revealed, whereas on the interior side the dye sorption is mostly in the polymolecular (dimer) state. The differences in staining can be evaluated by the monomer-dimer ratio (M/D), which may be used for comparison between the sorption characteristics of membrane preparations.

Published
1981

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