55 Result(s)

Article

Raman Markers of Toxic Nanofraction in Anatase TiO₂ Micropowder Used as E171 Food Additive

Titanium dioxide (TiO₂) micropowders widely used in modern food industry may contain particles in highly-toxic nanoform. Unlike micrometer-sized crystals, which cannot penetrate cell membranes, TiO₂ nanofraction ...

V. S. Krivobok, A. V. Kolobov, S. E. Dimitrieva… in Journal of Russian Laser Research (2021)

Article

Features of resonance structures in natural electromagnetic noise spectra in the region of the main ionospheric trough

The paper presents the results of studies of the resonance structures of the background electromagnetic noise spectrum obtained in a series of experiments in the autumn of 2012 in Karelia. The experiments are ...

N. V. Ivanov, Yu. A. Kopytenko, E. D. Tereshchenko… in Geomagnetism and Aeronomy (2017)

Article

Structure of the controlled halo-current magnetic field in the T-10 tokamak

In the T-10 tokamak, the magnetic field spatially resonant with a helical MHD perturbation is generated using the controlled halo current supplied using a contact method in the scrape-off-layer plasma. This pa...

N. V. Ivanov, A. M. Kakurin in Plasma Physics Reports (2011)

Article

Investigation of the peculiarities of artificial electromagnetic signal propagation at high latitudes in the range 0.1–10 Hz

The results of measurements of the artificial electromagnetic signal in the range 0.1–10 Hz on the Spitsbergen archipelago are presented in this paper. The signal was emitted by a horizontal antenna located on...

E. D. Tereshchenko, N. V. Ivanov, A. E. Sidorenko… in Geomagnetism and Aeronomy (2010)

Article

Amplification of the radiation of a bunch of charged particles moving in a waveguide lined with an active dielectric medium

The radiation of a bunch of charged particles moving along the axis of a cylindrical waveguide lined with a resonant dispersive dielectric medium is theoretically studied. Conditions necessary for the amplific...

N. V. Ivanov, A. V. Tyukhtin in Technical Physics Letters (2006)

Article

Phase State and Thermal Stability of Powders Prepared by Mechanical Activation of Iron in an Organosilicon Solution

Dispersity, structure, phase composition, and thermal stability of powders prepared by the mechanical activation of iron in a heptane containing vinyltriethoxysilane (VTES) are studied by the X-ray diffraction...

S. F. Lomaeva, N. V. Ivanov, E. P. Yelsukov in Colloid Journal (2004)

Article

Temperature stability of Fe₃C systems obtained by mechanochemical activation of iron in liquid organic media

Powder X-ray diffraction, Mössbauer, Auger and photoelectron spectroscopy are applied for the investigation of dispersion, structure, phase composition and temperature stability of powders obtained by mechanic...

S. F. Lomaeva, N. V. Ivanov, E. P. Elsukov… in Journal of Structural Chemistry (2004)

Article

Electron distribution and harmonic generation during plasma heating by high-power radiation

Anisotropic electron heating during the absorption of a strong high-frequency field due to electronion collisions is studied numerically by a Monte Carlo method. The electron distribution that forms in a stron...

A. Yu. Romanov, V. P. Silin, S. A. Uryupin, P. D. Gasparyan… in Plasma Physics Reports (2002)

Chapter

Effect of Environment on Delayed Failure in a Glass-Bonded Alumina

Delayed failure of a glass-bonded alumina in aqueous solutions is studied. Crack-growth velocity exponent is evaluated in dependence on the solution pH value with the use of a dynamic fatigue method. It is rev...

S. M. Barinov, N. V. Ivanov, A. V. Kurepin… in Fracture Mechanics of Ceramics (2002)

Article

Calculation of one-dimensional plasma flows with allowance for the kinetics of ion collisions

The influence of kinetic effects on the generation of line X radiation during the spherical implosion of a laser corona plasma with two ion species is studied under the conditions prevailing in experiments wit...

P. D. Gasparyan, N. V. Ivanov in Plasma Physics Reports (2001)

Article

Effect of aqueous solutions on time-dependent failure of a glass-bonded alumina

S. M. Barinov, N. V. Ivanov, A. V. Kurepin… in Journal of Materials Science Letters (2001)

Article

EFFECT OF AQUEOUS SOLUTIONS ON THE STRENGTH OF 22khs CERAMICS

Ceramics based on alumina undergo delayed failure in aqueous solutions as a result of stress corrosion. The effect of the loading rate on the strength of the 22KhS ceramics in aqueous solutions with pH ranging...

S. M. Barinov, N. V. Ivanov, A. V. Kurepin… in Refractories and Industrial Ceramics (2000)

Article

Inhibition of delayed failure in a glass-bonded alumina

S. M. Barinov, N. V. Ivanov, S. V. Orlov in Journal of Materials Science Letters (2000)

Article

Effect of the loading rate of the strength of GB-7 ceramics

The effect of the loading rate on the strength of an alumina ceramics of grade GB-7 in air is studied. It is established that the strength of the ceramics decreases substantially with increase in the loading r...

S. M. Barinov, N. V. Ivanov, S. V. Orlov… in Refractories and Industrial Ceramics (1998)

Article

Delayed fracture of aluminum oxide ceramics with a borosilicate vitreous phase

Tests for dynamic fatigue are used to investigate delayed fracture of aluminum oxide ceramics fabricated by sintering with participation of a liquid phase and containing 12 vol.% vitreous phase. The tests were...

S. M. Barinov, S. V. Orlov, V. Ya. Shevchenko… in Refractories and Industrial Ceramics (1996)

Article

Dynamic fatigue of ceramics based on aluminum oxide

A comparative study of the resistance of alumina-based ceramic materials with different grain-boundary phases to delayed fracture is described. The tests were conducted by the method of dynamic fatigue in air,...

S. M. Barinov, N. V. Ivanov, S. V. Orlov… in Refractories and Industrial Ceramics (1996)

Article

Determination of Pre- and post-tetanic quantum values in excitatory synapses of CA1 area of hippocampal slices: Application of the deconvolution method

The deconvolution method, i.e., reconstruction of noise-free discrete amplitude distributions of excitatory postsynaptic potentials (EPSPs), has been tested in computer experiments. A “generalized quantal mode...

L. L. Voronin, A. G. Gusev, N. V. Ivanov, U. Kuhnt in Neurophysiology (1993)

Article

Estimate of the quantum value variability in excitatory synapses of CA1 area in hippocampal slices and its effects on the quantum value estimate

Excitatory postsynaptic potentials (EPSPs) evoked by near-threshold stimulation of the radial layer were recorded from the CA1 area of guinea pig hippocampal slices. An optimization method based on the deconvo...

L. L. Voronin, N. V. Ivanov, U. Kuhnt in Neurophysiology (1993)

Article

Effective construction of a polymeric electrostatic precipitator

A. A. Moshkin, N. V. Ivanov, V. A. Khromov… in Chemical and Petroleum Engineering (1991)