[en] The amount and spatial distribution of U in limestone skarns of high alkalinity are studied using the method of f-radiography. The skarns consist of aegirine-salite, miserite and subordinate amounts of potassium fel spar, carbonate and fluorite. On the basis of the obtained data on the content and distribution of U it is shown that the formation of limestone skarns of high alkalinity is accompanied by the supply by skarn-forming solutions of U together with Th, TR, Y, Zr, and Nb which are concentrated in the newly- formed miserite. The stable paragenetic association of the latter with fluorite testifies to the great role of fluorine in the transfer of the above elements in the process of skarn formation

[en] Finite dimensional models of parabolic equations with a small diffusion are considered. Using asymptotic methods differential equations permitting to impart precise meaning to the notion of phase instability are derived. The conducted analysis of the equations shows that asynchronous oscillations that come from weakly bound harmonic oscillators take place with approximately equal amplitudes. However, differences in their phases can vary greatly with time. This fact is proved using the example of three oxillators

[en] A study was made on the extraction power of various diastereomers of dicyclohexyl-18-crown-6 (DCH 18K6): cis-syn-cis(A), cis-anti-cis(B), trans-syn-trans(C) - in processes fof extracting inorganic acids (HNO₃, HClO₄) and metal nitrates (Li, Na, K, Rb, Cs, Ca, Sr, Ba, Pb, Hg) from aqueous nitric acid solutions. It is shown that DCH18K6(A, B, C) diastereomers differ in extraction power in processes of metal nitrate extraction with respect to both the values of distribution factors and the position of extraction maximum (Dsub(max)) versus the HNO₃ concentration in the aqueous phase. The A isomer possesses higher Dsub(max) values and extracts metal salts more effectively at the HNO₃ concentration ranging between 1.7 and 3.3 M. At the same time the C isomer has manifested itself as a weaker extractant, while extracting salts from more concentrated HNO₃ solutions from 3 up to 3 M

[en] A problem of calculating all matrices of T(μ) monodromy satisfying certain commutation relations for the six-vertex model matrix is considered. The paper presents full description of all accurate L-operators (all monodromy-matrices per one lattice step). It is noted that the a/d function has the simpliest form for L operators, and the corresponding A, B, C, D operators act transitively in rather narrow subspace of the constructed space

[en] Calculation of radiation spectrum of electrons channelled in a thick crystal, conditioned by dechanneling and extracted at the expense of photon beam collimation in a rather narrow angular range is presented. The crystalline field of a crystal is chosen as a ''potential'' of inverted parabola. Expressions for the spectrum for frequent cases of circular and rectangular collimator at different thickness of the crystal are given. It is obtained that as an electron passes through the crystal the radiation spectrum is not practically deformed at a given angle of collimation. The results of the calculation satisfactorily agre with the experimental data for the case of 600-900 MeV electron channeling in the plane (001) of 350 μm thick diamonal crystal

[en] The character of procedure of the dark stage of UV-induced oxidation of phospholipides (PL) and arachidonic acid (AA), which have been oxidated initially, is studied. The character of procedure of the dark stage was judged by the kinetics of optical density changes at a fixed wave length after irradiation and by changes in the PL absorption spectrum. The results of the work carried out have shown, that the dark stage of oxidation of initially oxidated PL and AA does exist. In the process of oxidation of PL liposomes a chemical reaction of further transformation of the products of peroxide oxidation of lipides (POL) might appear - a spacially heterogeneous distribution of chemical components being required for the reaction occurrence

[en] A study was made on epithelium cells of the eye cornea in mices entering the first postradiation mitosis. The influence of laser rays acting in the course of each exposure during one and the same period of time, or continuously, or by pulses was compared. The effect of laser radiation was evaluated from the frequency of occurrence of cells with chromosomal aberrations, mitotic index, coefficient of mitosis phases. It has been established that pulse radiation of a helium-neon laser in a certain operation regime produces a sanitating effect on cells of eye cornea epithelium in white mice damaged by ionizing radiation. Cells being killed in the interphase were not revealed in epithelium of the eye cornea. It enables to conclude that the amount of aberrant mitoses decreases as a result of postradiation repair of cells damaged by ionizing radiation, but not as a result of their elimination

[en] The paper considers a possibility of generalizing Maxwell equations to the space with four Cartesian coordinates. New nontrivial relationships between physical quantities characterizing the electromagnetic field occur at that. A purely electromagnetic nature of the charged particle mass and probable electromagnetic origin of the inertial forces are substantiated

[en] To check the assumption on the possibility of revealing latent antigenes and receptors ''preexisting'' in intact plasmatic membranes of immunocompetent cells, the effect of UV-radiation (254 nm, C range) on spleen cells (splenocytes), thymus (thymocytes) on bone marrow of C3HA line male mice is investigated. The ability of ultraviolet to cause changes in the antigeneous structure of the surface of immunocompetent cells depending on the dose rate is found, which, as authors consider, alongside with literary data, proves the possibility of using this physical factor for the regulation of immune reactions on the cell level

[en] Solutions of Einstein-Maxwell equations under the following conditions are considered: solution asymptotically plane; two-soliton solution; solution possesses two-bond horizon, the radii of which are independent of the distance between sources; horizon radius of each of the sources equals to the radius of static black hole horizon with the same parameters