Changes in the orientation of the smooth-muscle cells of the tunica media from major arteries under constant lengthwise stretching in situ

It has been shown that changes in the orientation of arterial smooth muscle cells during a constant longitudinal stretching of the artery in vivo are not similar in different sections of the stretching zone. Cells in the proximal and distal sections keep their orientation but this orientation differs from that of smooth muscle cells in the control arteries. Cells in the central part of the stretching region lose their definite orientation to settle randomly.     

Electromagnetic compatibility of electric rolling stock for rail transportation

A circuit design is proposed and the possibilities for incorporation of an input double-notch low-frequency ripple filter are considered. Recommendations regarding the use of mathematical models for the calculation of transient processes in a DC electric-traction network are given. An analysis of the simulation of processes in a low-frequency filter shows that the emission of interference by the electric rolling stock should be estimated using the wavelet analysis since this approach best suits the studies of nonstationary signals.     

Investigation into Displacement of Placer Gold Particles

The experimental research in displacement of gold particles in washed-out thickness of sand-gravel layer is conducted. The parameters of ability of gold particles to migrate in pulp flow are determined, and their immersion into loose soil is investigated.     

Dewatering of liwuid radioactive wastes in thin-film rotary evaporators

Translated from Atomnaya Énergiya, Vol. 67, No. 1, pp. 11–15, July, 1989.     

Optical properties of a nonequilibrium vibrationally excited gas

Conclusion The study of the optical properties of vibrationally excited gas is part of the general problem of studying the physicochemical properties of a nonequilibrium gas. A nonequilibrium gas is a new state of a substance with extraordinary properties. Since stationary nonequilibrium is maintained by external pumping, then by changing the external conditions the properties of a nonequilibrium gas can be altered within quite broad limits. The presence of an excess reserve of internal (vibrational) energy transforms the medium into a nonlinear one. The characteristics of the medium start to depend on factors disturbing the nonequilibrium. On the other hand the disturbing factors themselves, say, the optical or gasdynamic disturbance, the charged particle fluxes, etc., will depend in turn on the nonequilibrium that they produce. Such self-consistency makes solution of the problem difficult but then it results in new phenomena such as self-focusing.Notation N_Av Avogadro number - density - n refractive index - N density of the number of molecules - their mean polarizability - Q_j set of normal coordinates - W₀ energy of a molecule without a field - gv _j statistical weight of the vibrational statev _j with normal coordinate Q_j - m_j reduced mass - _j frequency of the j-th mode - x_e anharmony constant of the molecule - probing radiation wavelength - shift of the interference fringe - d length of the interferometer arm - r₀ initial light beam radius Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 56, No. 5, pp. 824–838, May, 1989.     

Toughening epoxy resins by liquid crystalline polymers

Toughening epoxy resins can be achieved by blending a low percentage of Liquid Crystalline Polymer with the thermoset. The processing technique consists of the spinning of blends of a thermoplastic (Ardel) with the LCP (PET/PHB60). The bundled filaments are subsequently dissolved in the uncured epoxy resin (Epon 825). After curing, the LCP phase separates from the matrix in the form of microfibers with a very high aspect ratio, which act as crack stoppers and improve fracture toughness of the material.