Search results for: A. V. Petrov

Items from 1 to 20 out of 77 results

article

The Effect of Low-Frequency Magnetohydrodynamic Modes on the Development of Filaments in the Globus-M Tokamak

V. V. Bulanin, V. K. Gusev, G. S. Kurskiev, V. B. Minaev, more

Technical Physics Letters > 2019 > 45 > 10 > 977-980

Experimental data are presented that indicate the effect of the magnetohydrodynamic tearing mode in the Globus-M spherical tokamak on the occurrence of filamentary structures (filaments). The filaments are recorded by the Doppler backscattering method. The groups of filaments localized in the toroidal direction are discovered, the appearance of which is synchronized with the propagation of the tearing...

article

Femtosecond Optical and Magneto-Optical Spectroscopy Study of Magnetic and Electronic Inhomogeneities in a Pd_0.94Fe_0.06 Thin Film

A. V. Petrov, R. V. Yusupov, S. I. Nikitin, A. I. Gumarov, more

JETP Letters > 2019 > 110 > 3 > 217-222

The results of a femtosecond optical and magneto-optical spectroscopy study of a thin epitaxial film of a low-temperature magnetically soft Pd_0.94Fe_0.06 alloy on a ({dy001})-MgO substrate are reported. The photoinduced demagnetization and magnetization recovery times are determined. The latter increases critically at approaching the ferromagnetic ordering temperature T_C = 190 K from below. It is shown...

article

Geodesic Acoustic Mode Temporal Parameters Effect on the LH-Transition Initiation Possibility in TUMAN-3M Tokamak

A. A. Belokurov, G. I. Abdullina, L. G. Askinazi, V. V. Bulanin, more

Technical Physics Letters > 2019 > 45 > 8 > 783-785

Geodesic acoustic mode (GAM) observations in TUMAN-3M tokamak show that in ohmic discharges with low plasma density GAM have intermittent character; transition to high confinement regime (LH-transition) is usually preceded by a short (up to 5 ms) GAM burst series with distinctive frequency drop, or there exists long (up to 30 ms) GAM burst series evolution with several characteristic timescales and...

article

Toroidal Alfvén Modes in the Plasma of the Globus-M Spherical Tokamak

Yu. V. Petrov, N. N. Bakharev, V. V. Bulanin, V. K. Gusev, more

Plasma Physics Reports > 2019 > 45 > 8 > 723-731

Results of experimental studies of toroidal Alfvén eigenmodes (TAEs) in the Globus-M spherical tokamak (R = 36 cm, a = 24 cm) are reported. The experiments were carried out in a wide range of plasma parameters at a magnetic field of up to 0.5 T and plasma current of up to 250 kA. Auxiliary plasma heating was performed by tangential injection of a deuterium beam with a power of P_b= 0.75 MW and particle...

article

The Effect of Phase Aberrations on the Position and Length of the Filamentation Domain

D. V. Apeksimov, Yu. E. Geints, A. A. Zemlyanov, A. N. Iglakova, more

Atmospheric and Oceanic Optics > 2019 > 32 > 2 > 109-116

The results of experimental and theoretical studies of femtosecond laser pulse filamentation with use of a bimorph deformable mirror are presented. The mirror allows controlling the position of the filamentation domain throughout a model path due to phase distortions of different parts of a laser beam, determining localization of filaments and high-intensity channels in a beam cross section, and forming...

article

Electronic Structure of SO₃H Functional Groups and Proton Mobility in Nafion and Aquivion Ionomer Membranes

A. V. Petrov, I. V. Murin

Russian Journal of General Chemistry > 2019 > 89 > 3 > 553-555

The electronic structure of SO₃H functional groups in Nafion and Aquivion monomers was calculated. The effect of charge states of the functional group atoms on the proton mobility was studied.

article

Synthesis and photophysical properties of 2,3,4,5-tetraphenyl-1-n-octyl-1-monophosphole

A. V. Petrov, A. A. Zagidullin, T. I. Burganov, N. I. Shatalova, more

Russian Chemical Bulletin > 2019 > 68 > 2 > 445-448

A new method for the preparation of 2,3,4,5-tetraphenyl-1-octyl-1-monophosphole was developed. It was shown that the reaction of n-octyl chloride with a mixture of sodium 1,2,3-tri-and 1-monophospholides obtained by refluxing sodium polyphosphides with diphenylacetylene resulted in the formation of exclusively 1-n-octyl-1-monophosphole. The photophysical properties of 1-n-octyl-1-monophosphole were...

article

Disruption of Polymer and Composite Microcapsule Shells under High-Intensity Focused Ultrasound

O. A. Inozemtseva, D. V. Voronin, A. V. Petrov, V. V. Petrov, more

Colloid Journal > 2018 > 80 > 6 > 771-782

A process has been described for obtaining polymer (polyelectrolyte) microcapsules and polyelectrolyte/magnetite composite microcapsules, as well as silica-based hybrid capsules via silane-type precursor hydrolysis, which gives rise to the formation of silica nanoparticles in the structures of shells containing different numbers of polymer layers. The polymer and nanocomposite microcapsules have been...

article

Oriental Ambrosia Beetles (Coleoptera: Curculionidae: Scolytinae): New Inhabitants of Primorsky Krai in Russia

M. Yu. Mandelshtam, E. A. Yakushkin, A. V. Petrov

Russian Journal of Biological Invasions > 2018 > 9 > 4 > 355-365

Cnestus mutilatus (Blandford, 1894) and Microperus quercicola (Eggers, 1926) are recorded in Russia for the first time. These beetles were collected near the city of Partizansk (Primorsky krai) on native tree species by E.A. Yakushkin in 2017. Along with these ambrosia beetles, we recorded Xylosandrus germanus (Blandford, 1894), which recently emerged in the region, and Cyclorhipidion pelliculosum...

article

Investigation of Modification of Zinc Nanotubes by Bombardment with Kr⁺¹⁴ Ions

D. B. Kadyrzhanov, A. L. Kozlovskiy, M. V. Zdorovets, A. V. Petrov

High Energy Chemistry > 2018 > 52 > 4 > 302-306

It has been found that irradiation with Kr⁺¹⁷ ion beam makes it possible to modify the crystal structure of Zn nanotubes and to perform electron annealing of defects, which leads to a change in the main parameters of the crystal structure.

article

Localized High-Intensity Light Structures during Multiple Filamentation of Ti:Sapphire-Laser Femtosecond Pulses along an Air Path

D. V. Apeksimov, A. A. Zemlyanov, A. N. Iglakova, A. M. Kabanov, more

Atmospheric and Oceanic Optics > 2018 > 31 > 2 > 107-111

The results of experimental studies of the transverse structure of a laser beam after multiple filamentation are presented. A ring structure of radiation is formed around individual filaments in a beam cross section inside the multiple filamentation domain, and at a dozen meters from it a common ring structure starts forming surrounding postfilamentation light channels (PFC). It is shown that the...

article

Electronic Structure of Fullerene Derivatives with Malonic Acid Fragments

A. V. Petrov, K. N. Semenov, I. V. Murin

Russian Journal of General Chemistry > 2018 > 88 > 3 > 610-612

The electronic structure of fullerene C₆₀ derivatives containing malonic acid fragments used as dopants in nanocomposite polymer electrolytic membranes was calculated by the density functional method. Charge states of atoms, thus determined, are necessary for molecular-dynamic simulation of proton mobility in these membranes.

article

A Three-Point Bending Test Machine for Studying the Thermomechanical Properties of Shape Memory Alloys

V. S. Kalashnikov, V. V. Koledov, D. S. Kuchin, A. V. Petrov, more

Instruments and Experimental Techniques > 2018 > 61 > 2 > 306-312

An experimental test machine for studying of the thermomechanical properties of shape-memory alloys in the temperature range from −130 to +300°C under mechanical stresses of up to 2000 MPa and the maximum bending deformation of a sample of up to 20% is described. The principle of operation of the test machine is based on three-point bending of a sample at a variable temperature and a constant load...

article

Global Self-Focusing and Features of Multiple Filamentation of Radiation of a Subterawatt Ti:Sapphire Laser with a Centimeter Output Aperture Along a 150-m Path

D. V. Apeksimov, A. A. Zemlyanov, A. N. Iglakova, A. M. Kabanov, more

Atmospheric and Oceanic Optics > 2018 > 31 > 1 > 31-35

The formation and propagation of postfilamentation channels along a controllable path 150 m long are studied experimentally for collimated beams of different diameters. During multiple filamentation, a laser beam is compressed into a global focus, after passing which its angular divergence is much greater than the divergence of postfilamentation channels generated during the filamentation. It is shown...

article

Detection of Alfvén Oscillations on the Globus-M Tokamak Using the Doppler Backscattering Method

V. V. Bulanin, V. K. Gusev, G. S. Kurskiev, V. B. Minaev, more

Technical Physics Letters > 2017 > 43 > 12 > 1067-1070

The method of Doppler backscattering (DBS) has been applied for the study of Alfvén oscillations in the tokamak plasma for the first time. The oscillations of the plasma rotation velocity at the Alfvén frequency have been able to be registered using DBS during the studies on the Globus-M spherical tokamak. The area of the development of Alfvén instability has been determined. The measurement of the...

article

Multiple Filamentation Various Diameters Laser Beams at a Atmospheric Path

D. V. Apeksimov, A. A. Zemlynov, A. I. Iglakova, A. M. Kabanov, more

Optical Memory and Neural Networks > 2018 > 27 > 1 > 53-57

Results of experiments on controlling the position and length of the filamentation zone of femtosecond laser pulses in atmospheric path length 150 m using different initial spatial focusing and defocusing. The obtained distribution of filaments along the filamentation domain, measured dependence the length of the filamentation zone of the numerical aperture of the beam, its initial radius and pulse...

article

A New Genus and Species of Scolytinae (Coleoptera: Curculionidae) from the Rovno Amber

A. V. Petrov, E. E. Perkovsky

Paleontological Journal > 2018 > 52 > 2 > 164-167

A new genus, Klesovia gen. nov., with the species K. pubescens sp. nov. (Coleoptera: Curculionidae) are described from the Rovno amber. The new genus is closely related to Xylechinus (tribe Hylurgini) and distinguished by the wide flattened ovoid antennal club with rounded apex and the metepisternum covered with long thin sparse setae; it differs from other genera of Hylurgini in having a five-segmented...

article

Human IL-36RA production in Escherichia coli with coexpression of E. coli methionine aminopeptidase. I. Comparison of IL-36RA production in different strains

A. A. Kolobov, E. V. Kondratyeva, T. V. Kudling, M. M. Karasev, more

Cell and Tissue Biology > 2017 > 11 > 6 > 447-452

Generalized pustular psoriasis (GPP) is a rare, sometimes lethal, form of psoriasis caused by series of mutations in the interleukin-36 receptor antagonist (IL-36RA) gene associated with its reduced expression or activity. Administration of exogenous IL-36RA can be a potent therapeutic approach to treating GPP and other forms of psoriasis. Since cleavage of the starting N-formylmethionine residue...

article

Low-temperature equilibriums in solutions of isocyanide-phosphine complexes of palladium(II) chloride

M. A. Kinzhalov, A. V. Buldakov, A. V. Petrov, K. T. Mahmudov, more

Russian Journal of General Chemistry > 2017 > 87 > 11 > 2605-2611

cis-[PdCl₂(CNR)(PPh₃)] [R = Cy, t-Bu, C(Me)₂CH₂C(Me)₃] have been synthesized via the interaction of [(PPh₃)ClPd(μ-Cl)₂PdCl(PPh₃)] with isocyanide in CH₂Cl₂ at room temperature with 90–98% yield and characterized by means of mass spectrometry as well as ¹H, ¹³C{¹H, ³¹P}, and ³¹P{¹H} NMR spectroscopy. The complexes structure in the solid phase has been elucidated by means of X-ray diffraction analysis...

article

Human IL-36RA production in Escherichia coli with coexpression of E. coli methionine aminopeptidase. II. Comparison of IL-36RA biological activity from different strains

A. A. Kolobov, E. V. Kondratyeva, T. A. Sharafutdinova, R. S. Kalinin, more

Cell and Tissue Biology > 2017 > 11 > 6 > 453-457

Proinflammatory cytokines of the interleukin-36 (IL-36) family are involved in the pathogenesis of different skin diseases in human and mice. Administration of exogenous IL-36 receptor antagonist (IL-36RA) may be an approach to therapy of different dermatitises. For its full biological activity, IL-36RA requires cleavage of N-terminal methionine residue. We created three E. coli strains producing...

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Search results for: A. V. Petrov

The Effect of Low-Frequency Magnetohydrodynamic Modes on the Development of Filaments in the Globus-M Tokamak

Femtosecond Optical and Magneto-Optical Spectroscopy Study of Magnetic and Electronic Inhomogeneities in a Pd_0.94Fe_0.06 Thin Film

Geodesic Acoustic Mode Temporal Parameters Effect on the LH-Transition Initiation Possibility in TUMAN-3M Tokamak

Toroidal Alfvén Modes in the Plasma of the Globus-M Spherical Tokamak

The Effect of Phase Aberrations on the Position and Length of the Filamentation Domain

Electronic Structure of SO₃H Functional Groups and Proton Mobility in Nafion and Aquivion Ionomer Membranes

Synthesis and photophysical properties of 2,3,4,5-tetraphenyl-1-n-octyl-1-monophosphole

Disruption of Polymer and Composite Microcapsule Shells under High-Intensity Focused Ultrasound

Oriental Ambrosia Beetles (Coleoptera: Curculionidae: Scolytinae): New Inhabitants of Primorsky Krai in Russia

Investigation of Modification of Zinc Nanotubes by Bombardment with Kr⁺¹⁴ Ions

Localized High-Intensity Light Structures during Multiple Filamentation of Ti:Sapphire-Laser Femtosecond Pulses along an Air Path

Electronic Structure of Fullerene Derivatives with Malonic Acid Fragments

A Three-Point Bending Test Machine for Studying the Thermomechanical Properties of Shape Memory Alloys

Global Self-Focusing and Features of Multiple Filamentation of Radiation of a Subterawatt Ti:Sapphire Laser with a Centimeter Output Aperture Along a 150-m Path

Detection of Alfvén Oscillations on the Globus-M Tokamak Using the Doppler Backscattering Method

Multiple Filamentation Various Diameters Laser Beams at a Atmospheric Path

A New Genus and Species of Scolytinae (Coleoptera: Curculionidae) from the Rovno Amber

Human IL-36RA production in Escherichia coli with coexpression of E. coli methionine aminopeptidase. I. Comparison of IL-36RA production in different strains

Low-temperature equilibriums in solutions of isocyanide-phosphine complexes of palladium(II) chloride

Human IL-36RA production in Escherichia coli with coexpression of E. coli methionine aminopeptidase. II. Comparison of IL-36RA biological activity from different strains

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