A novel microwave plasma (MP) torch on a rectangular waveguide with two magnetron sources 2.45 GHz and an experimental setup are designed to perform hydroxyapatite (HA) coatings on metallic and dielectric substrates. Operating regimes of a such torch are investigated. Experimental studies have proved the advantages of this method of HA coating in comparison with analogous techniques. The proposed design is suitable for application in other technologies of different materials processing. Results obtained in the present study help to better understand the processes of nano-structural layer formation on solid substrates.

AbstractThe manifestation of piezoelectric resonances in high-resolution impedance spectra was found and interpreted using the example of KDP crystal. A resonance signal inversion was observed in LiIO_3 crystals, having significant ion conductivity.

The manifestation of piezoelectric resonances in high-resolution impedance spectra was found and interpreted using the example of KDP crystal. A resonance signal inversion was observed in LiIO 3 crystals, having significant ion conductivity.

We have studied a diffusion model of the excitation and decay of a system of coupled particles in an external field. Using the example of a hydrogen chloride molecule, it is shown that electron oscillations exhibit chaotization that leads to diffusion ionization (or dissociation) in a sufficiently strong microwave field. The dependence of the rate of diffusion ionization on the radiation intensity and ellipticity of polarization and on the energy of excitation of the vibrational and rotational degrees of freedom has been numerically simulated. It is established that the ionization time significantly exceeds the period of electron motion over the undisturbed orbit.

The SU (2) Yang-Mills fields turbulent dynamics in the thermostats and at their stochastic quantization are investigated by the Langeven’s sources method. It is shown, that the phase transitions as confinement-deconfinement takes place in the chromodynamics with temperature growth, and quantization of the Yang-Mills fields results in increase of the colors correlation radius. 1. Introduction. The urgency of examination of a chaotic character of the gauge fields in the model Yang-Mills (YM) is bound to an opportunity of nonconventional interpretation of the hadronization and the confinement of the color charges carriers (quarks and gluons) in the high-energy physics. Are most accessible to examination the spatially homogeneous and flat gauge fields in the YM model. And plane waves may be shown to the homogeneous case since they are gained from the homogeneous with the help of Lorentz transformation laws. This transformation always exists, in dierence, for example, from the linear massless electrodynamics, due to nonlinearity of the free non-Abelian gauge fields [1]. In spite of the fact that these YM models of fields are extreme simplification for actual the spatially-nonuniform YM fields, their examination represents the considerable interest owing to the following circumstances: 1. The requirement of homogeneity means the long-wave approach (or the strong fields) ‚ >> A i1 (‚;A - the dimensionless wave length and amplitude of the field) and it is possible to hope, that the study of such models of the YM fields is useful for deriving the information on an infrared mode of quantum chromodynamics (QCD); 2. The homogeneous models are important by viewing a problem of quantization of the gauge fields in the YM model. As the chaotic character means fracture of integrals of a motion there is a problem of definition of a hamiltonian spectrum even for the homogeneous system. In particular, the homogeneous YM fields are an example systems, chaotic at as much as small energy density. It means, that in the field of small energies approach of a quantum oscillator is unjustified since the requirement about discreteness of a spectrum of a Hamiltonian is broken; 3. The homogeneous models, due to the mathematical simplicity, allow to study the reference role of nonlinearity - self-activity the gauge fields in the YM model at presence of a finite number of degrees of freedom with an opportunity of a heavy use of computer experiment. It gives the important information on behaviour and the nonuniform gauge YM fields. The finite number of modes actually participates in dynamics of the last in a case, for example, periodic boundary conditions; 4. The important circumstance is bound to properties of absence of an integrability of the nonuniform gauge field in the YM model under condition of it non-integrability in the homogeneous case. The threshold amount of energy of occurrence of random instability depends generally on number of degrees of freedom of system and, as a rule, tends to

A facility for probe measurements of the dispersion characteristics of polycrystalline ferrite plates is described. The measurements are based on the analysis of a fringe pattern of a microwave field under the superposition of a few electromagnetic waves in the studied sample, which was placed in a magnetizing field. It is shown that experimental fringe patterns enable the restoration of dispersion characteristics of polycrystalline ferrite plates within a frequency band of 2–7 GHz at magnetizing fields of 2–3.2 kG.

1. The intracellular mechanism of heterosynaptic facilitation (HSF) formation in identified neurons from the snail Planorbis corneus has been studied. 2. Facilitation of excitatory postsynaptic currents (EPSC) were induced by (a) stimulation of pallial nerve, and (b) addition to extracellular saline of serotonin, NaF, papaverine, theophylline, caffeine or dibutril-cAMP. 3. A depression of EPSC in solutions containing tolbutamide, a cAMP-dependent protein kinase inhibitor was observed. 4. In some cases the similar facilitation or depression of the current induced by acetylcholine application (ACh-current) was found in the same neuron. 5. The effects on ACh-current were distorted in solutions containing caffeine, a well-known activator of calcium ions release from the intracellular depot. 6. According to our findings, we suggest that adenylate cyclase activity of postsynaptic cells could underlie the formation of HSF and it is likely that this activity was modulated by intracellular concentration of calcium ions.

In an analysis of the postsynaptic mechanism of heterosynaptic facilitation, changes in the amplitude of the excitatory postsynaptic current (EPSC) and the current evoked by application of acetylcholine (ACh current), acting on the adenylate cyclase system of the LC-1 and RC-1 neurons of the molluskPlanorbis corneus, were compared. Both responses are n-cholinergic and depend on the membrane conductivity for Na+ and K+. Application of serotonin led to a 100–300% increase in the amplitude of the EPSC and (in most cases) the ACh current. However, in 30% of the cases, the increase in the EPSC was accompanied by a decrease in the ACh current. This is probably due to the different contributions of Na+ and K+ to the mechanism of activation of the conductivity of th channel-receptor complex of the nonsynaptic cell membrane. The influence of serotonin on the EPSC and ACh current was simulated by the action of phosphodiesterase blockers and adenylate cyclase activators. Phosphodiesterase activators and protein kinase blockers reversibly inhibited the EPSC and ACh current. Thus, activation of the adenylate cyclase system, mediated by the action of serotonin, promotes the development of a postsynaptic mechanism of formation of heterosynaptic facilitation of the EPSC in the command neurons of the mollusk.