Influence of image forces on charge-dipole interaction in two-layered systems.

Interaction between a fixed point electric charge Q and a freely rotating point electric dipole with the magnitude P pinned near a plane interface between two dispersionless insulators with different dielectric permittivities ɛ1 and ɛ2 has been considered. It was shown that, as a result of this interaction and the interaction of the dipole with the polarization charges induced at the interface by the charge Q and the dipole itself, there arise regions where the dipole can possess either one or two equilibrium orientations. The spatial distributions of the electrostatic dipole energy Wtotal under the combined action of the charge Q and the induced interface polarization charges, as well as the equilibrium dipole orientations (orientation maps), the boundaries between the regions with different numbers of dipole orientations, and their evolution with the variation of problem parameters (the charge and dipole magnitudes, the mismatch between ɛ1 and ɛ2, and the charge-interface distance) were calculated.

Electrostatic image force energy for charges in three-layer structures: exact formulas and their approximations.

The problem of image force energy() in three-layer plane structures, whereis the coordinate perpendicular to the layers, has been reconsidered. In the classical electrostatic limit, where the dielectric permittivitiesof all structure components (= 1, 2, 3) are constants, the exact general dependences() were obtained for each layer and any-combination in terms of the Lerch transcendent function. For certain combinations of, an ion adsorption minimum was found to arise in one of the covers far from the interlayer.

Electric dipole image forces in three-layer systems: The classical electrostatic model.

General exact analytical expressions have been derived for the image force energy W(Z, φ) of a point dipole in a classical three-layer system composed of dispersionless media with arbitrary constant dielectric permittivities ε. Here, i = 1-3 is the layer number, and Z and φ are the dipole coordinate and orientation angle, respectively. It was found that the long-range asymptotics W(Z→∞,φ) in both covers (i = 1, 3) are reached unexpectedly far from the interlayer (i = 2).

Orientation of adsorbed polar molecules (dipoles) in external electrostatic field.

A model is proposed in the framework of classical electrostatics to describe the behavior of an adsorbed polar molecule near the plane interface between two insulators under the action of an external electrostatic field. The molecule is considered as a permanent point dipole that polarizes the interface and interacts with it through electrostatic image forces. The latter and the applied field try to reorient the dipole in a competitive manner.

Quasiparticle conductance-voltage characteristics for break junctions involving d-wave superconductors: charge-density-wave effects.

Quasiparticle tunnel conductance-voltage characteristics (CVCs), [Formula: see text], were calculated for break junctions (BJs) made up of layered d-wave superconductors partially gapped by charge-density waves (CDWs). The current is assumed to flow in the ab-plane of electrodes. The influence of CDWs is analyzed by comparing the resulting CVCs with CVCs calculated for BJs made up of pure d-wave superconductors with relevant parameters.

Influence of the spatially inhomogeneous gap distribution on the quasiparticle current in c-axis junctions involving d-wave superconductors with charge density waves.

The quasiparticle tunnel current J(V) between the superconducting ab-planes along the c-axis and the corresponding conductance [Formula: see text] were calculated for symmetric junctions composed of disordered d-wave layered superconductors partially gapped by charge density waves (CDWs). Here, V is the voltage. Both the checkerboard and unidirectional CDWs were considered.

The phase diagram for coexisting d-wave superconductivity and charge-density waves: cuprates and beyond.

Phase diagrams of d-wave superconductivity characterized by an order parameter Δ coexisting with charge-density waves (CDWs) characterized by an order parameter Σ were constructed for the two-dimensional Fermi surface (FS) appropriate to, e.g., cuprates.

New method for deciphering free energy landscape of three-state proteins.

We have developed a new simulation method to estimate the distance between the native state and the first transition state and the distance between the intermediate state and the second transition state of a protein which mechanically unfolds via intermediates. Assuming that the end-to-end extension DeltaR is a good reaction coordinate to describe the free energy landscape of proteins subjected to an external force, we define the midpoint extension DeltaR(*) between two transition states from either constant force or constant loading rate pulling simulations. In the former case, DeltaR(*) is defined as a middle point between two plateaus in the time-dependent curve of DeltaR, while, in the latter one, it is a middle point between two peaks in the force-extension curve.

[Medical control on the state of pilots' health suffering from urologic diseases].

The complexity of flying work and human factor significance increase the responsibility of aviation physician for health and high working capacity of the flying staff. The early diagnosis of potentially dangerous urological pathology is of particular importance because the renal and urinary tract diseases are revealed unexpectedly among the flying staff. The incidence of surgical pathology including the urologic one takes the third place in the RF Armed Forces.

Excess nonspecific Coulomb ion adsorption at the metal electrode/electrolyte solution interface: role of the surface layer.

Excess ion adsorption gamma induced by the polarization image forces in the system of a metal electrode/symmetric electrolyte solution separated by an insulating interlayer has been calculated. The adopted theoretical scheme involves the Coulomb Green's function in a three-layer system with sharp interfaces and specular reflection at them. The influence of the spatial dispersion of the dielectric permittivities epsilon(i)(k) in all the three media on the image force energy W(im) and the adsorption gamma has been analyzed, where k is the wave vector.

[Criteria for hygienic evaluation of working environment concerning sea transport objects].

The studies carried during ships navigation covered some intrinsic factors (levels of noise, vibration, microclimate, air components, concentration of polymers, electrostatic fields, and others) of the ship and such extrinsic environmental factors as climate of the navigation area, temperature, ambient air moisture, wind force and direction. The studies proved strong correlation between hygienic parameters in the ship and its type and destination, length of service, climate of the navigation area, that is assumed to be a criteria for evaluation of work conditions at the ship.

[Changes in the blood serum aminotransferase activity in the experimental infection of Cercopithecus aethiops monkeys with the Marburg virus].

Aminotransferase levels in the peripheral blood serum of African green monkeys were studied after aerosol infection with lyophilized virus preparation. A correlation between aminotransferase activity and other symptoms of hemorrhagic fever was shown. Considerable variations in the features of aminotransferase activity in severe and mild cases of the disease were observed.

[The effect of the methods for producing an experimental Marburg virus infection on the characteristics of the course of the disease in green monkeys].

A comparative study on the features of the pathogenesis of Marburg disease after parenteral and aerosol infection of green monkeys with a virus prepared from native culture suspension and that after lyophilization was carried out. The changes in the dynamics of the clotting time, the activity of serum aminotransferases, the duration of prefebrile period and survival time were analysed in different cases. No lethality was observed in animals infected with small doses of aerosol preparations.

[The water-electrolyte balance in rats with acute overheating and forced rehydration].

The animals were overheated in thermal chamber for the period of 4 hours at 37 degrees C. Though the water intake was not limited, the rats developed the state of dehydration accompanied by weight loss, redistribution of water and electrolytes in tissues and decrease of circulation plasma volume. Intragastric probe water administration in the quantity equal to the weight loss led to partial rehabilitation of the initial indexes, however full rehabilitation of water-electrolyte balance was observed while administering hypotonic salt solution.

[Scientific and technical progress and the problems of protecting the health of workers in water transport].

The influence of scientific and technological progress on the work and life of man in the world ocean is analysed. The main results of investigations and practical solutions are described in details. The drawbacks in the research of some aspects of the problem are shown and the objects of further investigations are outlined.

[Hygienic evaluation of the methods of water conditioning on marine ships].

Results of test stands and of field studies (on marine ships) have shown, that the use of installations for water preparation (IWP), including mineralizers of the wash out type and ozonizers, makes it possible to get water of stable quality independent of the terms of operations of the installations, and also provides the possibility of conditioning of shore water supply and of carrying out disinfection of the ship water supply system. Comparative analysis of the operation of various kinds of IWP on marine ships testifies to the necessity of development of the new types of IWP, which will promote health preservation of crew members having difficult long independent voyages.

[Hygienic evaluation of the effectiveness of using aluminum oxychloride for purification of ships' waste water].

Treatment of multicomponent composition ship waste waters by an aluminum-containing waste is substantiated from the hygienic point of view both in laboratory and field studies. The tested principle of treatment provides deep purification of liquid wastes according to the following indicators; particulate matter--95.3%; BCO5--90.