The Polarization of Radiation in Single Cristals in the Quasiclassical Approach

The radiation emission spectra of polarized photons emitted from charged particles in single oriented crystals are obtained in Bayer-Katkov quasiclassical approach. The results of numerical calculations are presented in the region of small angles of incidence for which the coherent theory fails but magnetic bremsstrahlung region isn't yet achieved. The spectral distribution of linear polarization degree repeats, in general, the form of the intensity distribution. At sufficiently small angles, in the case of planar orientation of crystal, there is a wide maximum of essential linear polarization at low frequencies.Comment: Latex with 3 figures (.eps files). used epsfig.sty and wrapfig.st

Thirteen papers in algebra

The topics in this collection range over several diverse areas, such as graph theory, continued fractions, complex manifolds, and group theory

Changes in microglia activity of rat brain induced by Macrovipera lebetina obtusa venom

Aim: The microglia activity of rat brain following exposure of the Macrovipera lebetina obtusa venom was investigated.Methods: Histochemical analysis of brain microcirculatory bed staining by Ca2+ ATPase method for variable doses after intraperitoneal injections given for different time periods was used. The hemorrhagic activity of snake venom metalloproteinases was tested. Toxicological data were calculated using Behrens and Miller-Tainter methods. Surface, size of brain microglial cells (MGCs) and staining intensity were quantified using ImageJ software.Results: The vasodestructive action of the venom resulted in changes in ATPase activity. The intensity of staining of rat brain microcirculatory bed was venom dose-, and time-dependent. Increased activity of MGCs in hemorrhagic loci of different regions of venom affected brain was also demonstrated.Conclusion: The activation of microglia and changes of its form, size, and position strongly correlates with hemorrhage-induced cerebrovascular damage