ЭЛЕКТРОНА В КУЛОНОВСКОМ ПОЛЕ СВЕРХТЯЖЕЛОГО ЯДРАРассмотрены особенности энергетического спектра электрона в кулоновском поле сверхтяжелого ядра, обсуждаются долгая история неверной трактовки этой проблемы в случае точечного ядра и ее теперешнее правильное решение.Рассмотрена спектральная задача в случае регуляризованного кулоновского поля.При некоторой специальной регуляризации выведено точное уравнение, определяющее точечный спектр в интервале энергий (-m, m), и найдены численно некоторые его решения.Выведено также точное уравнение для зарядов, дающих связанные состояния с энергией E = -m; некоторые называют эти заряды сверхкритическими

The tunnel ventilation schemes for tunneling period are considered and it’s shown that major characteristics of aerogasdynamics processes during tunneling period are parameters moving air flow and diffusion transfer of escaping gas admixtures. Basic theoretical foundations of modeling motion and diffusion gas admixtures in tunnels were substantiated.

This paper proposes a method for determining the size and polydisperseness of particles suspended in a liquid, based on recording the small-angle-scattering spectra in the range from 190 to 1100 nm and interpreting the spectra by means of a mathematical model based on Mie theory. (C) 2008 Optical Society of America.

The spectra of small-angle light scattering (SALS) by disperse particles suspended in an absorbing liquid have been numerically simulated using the Mie theory and measured in a wavelength range from 190 to 1100 nm. It is established that the SALS spectra contain regions sensitive to the size and polydispersity of particles with radii ranging from 0.4 to 30 μm. Using the joint processing of SALS and transmission spectra measured using a double-beam spectrophotometer with a modified optical scheme, it is possible to determine the parameters of particles suspended in the absorbing liquid. Data for model suspensions of polystyrene latex particles are presented.

Quantitative estimates of the components of the error associated with the spectral characteristics of interference light filters, the curving of the surface of a liquid in a crater of the microplotter due to its motion, and capillary effects are given. Methods of identifying and limiting these errors are proposed.

We study the impact of Aharonov–Bohm solenoid on the radiation of a charged particle moving in a constant uniform magnetic field. With this aim in view, exact solutions of Klein–Gordon and Dirac equations are found in the magnetic-solenoid field. Using such solutions, we calculate exactly all the characteristics of one-photon spontaneous radiation both for spinless and spinning particle. Considering non-relativistic and relativistic approximations, we analyze cyclotron and synchrotron radiations in detail. Radiation peculiarities caused by the presence of the solenoid may be considered as a manifestation of Aharonov–Bohm effect in the radiation. In particular, it is shown that new spectral lines appear in the radiation spectrum. Due to angular distribution peculiarities of the radiation intensity, these lines can in principle be isolated from basic cyclotron and synchrotron radiation spectra.

Ferroelectric films on dielectric substrates prepared by reactive rf sputtering have been studied. The temperature and external electric field dependencies of the permittivity of the films are deduced. It is shown that deposition of metallic electrodes onto the surface of the film leads to an increase in the permittivity and to an enhancement of the dependency of ɛ on temperature and the external electric field. The observed effects may be explained by the formation of an electrode-film interface layer.

Antigen-binding activity and effector functions of immunoglobulin G from horse and rabbit sera have been investigated, using hemagglutination, kinetic immune lysis, immune lysis in microplates and rosette-forming test with peritoneal mononuclear cells of mice, after their conjugation with dextran, MW 35-50 kD. The formation of conjugates of two types has been demonstrated: protein-dextran and protein-dextran-protein. It has been revealed that protein-dextran-protein conjugates have high specific antigen-binding activity, as compared to native IgG from rabbit sera specific for SRBC, while interactions with the complement system and Fc receptors is depressed.

Active anaphylaxis in 238 guinea-pigs has revealed a decrease in the anaphylactogenic activity of horse blood serum IgG conjugates with dextran and of serum treated with dextran according to Diaferm method. The conjugates were used for a challenge injection. The sensitizing activity of dextran-conjugated proteins was higher than that of native proteins. The effect was most pronounced with 150,000 D dextran used as a matrix. A lower increase in sensitizing protein activity and a decrease in anaphylactogenic activity were achieved with dextran matrix of the molecular weight of 35-50 D and protein/dextran ratio from 1:6 to 1:9.