Physics

Optical Transient Nutation in Frequency-modulated cw Laser Beams in Resonant Self-Action Conditions

Authors: Plastun I. L., Misyurin A. G.

On the basis of numerical simulations an optical transient nutation is investigated. This effect is developed on high modulation amplitude of frequency-modulated cw laser beam propagating in resonance conditions. At modulation periods comparable with the atomic relaxation times the time dependence of the output intensity exhibits the combined manifestations of optical nutation and resonance self-action.

Parametric Gain Calculation in Photonic Crystal Fiber

Authors: Plastun A. S., Konyukhov A. I., Melnikov L. A., Mazhirina J. A.

Signal wave parametric gain was calculated in photonic crystal optical fiber. Photonic crystal fiber structure was optimized for broadband parametric gain. It is shown, that gain bandwidth for photonic-crystal fiber optical parametric amplifier could be more than 400 nm. Spectral changings in parametric gain due to modulation of photonic crystal waveguide cross-section was studied.

Modelling Calculations of Vibrational Spectra for Substituted Benzoic Acid

Authors: El’kin P. M., Umansky I. M., Dzhalmukhambetova E. A.

On the base of modeling calculations of geometric and electronic structure for substituted benzoic acid the parameters of adiabatic potential are investigated.

Dynamics of Morphological and Biochemical Changes in Laboratory Animals with Transplanted Kidney Cancer after Intravenous Injection of Gold Nanoshells

Authors: Navolokin N. A., Maslyakova G. N., Bucharskaya A. B., Suleymanova L. V., Kun S. M., Terentyuk G. S., Khlebtsov N. G., Khlebtsov B. N.

The effect of intravenously injected nanoshells on white outbred male rats with transplanted tumor of kidney cancer was studied. The blood biochemical parameters and morphological changes in the rat internal organs were examined during 24 h after nanoparticle injection. The most pronounced changes were observed 45 min – 2 h after nanoparticle injection and were reversible.

Morphological Changes in the Internal Organs and Implanted Liver Tumor after Intravenous Injection of Gold Nanorods in Rats with Diabetes and Transplanted Tumor

Authors: Bucharskaya A. B., Terentyuk G. S., Maslyakova G. N., Matveeva O. V., Navolokin N. A., Dicht N. I., Khlebtsov N. G., Khlebtsov B. N.

The effects of gold nanorods on the internal organs and the transplanted liver tumor were studied in rats with simulated alloxan diabetes and transplanted liver tumors after intravenous administration. Assessed morphofunctional changes and biodistribution of gold in the internal organs and transplanted liver tumor. The study found that a single intravenous injection of gold nanorods does not cause significant morphological changes in the internal organs and transplanted tumors in rats with alloxan diabetes and transplanted tumor.

The Study of Possibility of Magnetic Microparticle Deposit in Skin at Superficial Application

Authors: Genina E. A., Bashkatov A. N., Tuchin V. V.

The depth of penetration and localization of magnetic microparticles in skin under action of magnetostatic field was studied experimentally. In the study magnetic powder made from intermetallic composition SmCo5 consisting of 37% of samarium and 63% of cobalt was used. Sizes of the particles varied in the range 3–5 μm. As a carrier propylene glycol was used. The experiments were carried out with human skin samples in vitro.

Vibrational Spectra and Structure of Spinohromes

Authors: El’kin M. D., Babkov L. M.

Modeling calculations of geometric structure and vibrational spectra for spinazarin, ethylspinazarin, echinochrom is carried.

Spheroidal Graphite – Unique Morphological Formation of Carbon

Authors: Anikin A. A., Venig S. B., Belenko D. I., Gribov A. N.

Spheroidal graphite is little-known form of graphite. It is known that its presence affects the properties of gray cast iron post, typical steels. Research evidence that the spheroidal graphite is a unique layered spiral system of micro-and nanostructures, the inhomogeneous phase composition, structure and elemental composition with predominantly periodic alternation of closely spaced layers. Such systems can have properties and their combinations significantly different than the individual micro-and nanoparticles and composites based on them.

Mathematical and Computer Modeling of Nonlinear Waves Dynamics in a Physically Nonlinear Elastic Cylindrical Shells with Viscous Incompressible Liquid inside Them

Authors: Blinkova A. Y., Ivanov S. V., Kovalev A. D., Mogilevich L. I.

This study focuses on the analysis of nonlinear wave propagation deformations in the elastic physically nonlinear cylindrical shells, containing a viscous incompressible fluid. Wave processes in an elastic cylindrical shell without interacting with fluid were previously studied from the standpoint of the theory of solitons. The developed model describes the processes in the tubes of relatively small diameter compared to the wavelength, such as blood vessels.

Determining Parameters of Planar Capacitors Based of Thin Film Ferroelectric Materials

Authors: Chucheva G. V., Afanasyev M. S., Anisimov I. A., Georgieva A. I., Levashov S. A., Nabiyev A. E.

Experimental results suggest that in the Ni/Ba0.8Sr0.2TiO3/MgO structure with linear sizes of 150 ×150 mm can be realized by planar capacitor elements of variability over a range of capacity from 0.02 pF to 3.0 pF, which increased capacity is achieved by increasing the number of electrode sections.

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