Electrochemical Separation of Multicomponent Tin-based Alloys in Salt Melts

The results obtained in a study of the electrochemical separation of multicomponent tin-based alloys in salt melts are presented. The influence exerted by electrolysis conditions on the discharge at the auxiliary electrode of a number of metals accompanying lead and tin was determined.     

Asymptotic Solution of the Extended Cahn—Hilliard Model

The paper is devoted to asymptotic analysis of the mathematical model of two-composite materials. The main result is the deduction of the extended Stefan problem being a singular limit of the initial problem.     

Carbon nanotubes: Potential uses in radionuclide concentration

The review of literature data related to the preparation, properties, and application of carbon nanotubes for sorption recovery of elements is given. Experimental data on the application of Taunit carbon nanofor radionuclide preconcentration from different solutions, as well as of Taunit-based solid-phase extractants for recovery of actinides and rare-earth elements from nitric acid solutions are presented.     

Analysis of Phototherapy Effectiveness Using Thermography

A thermographic study of low-intensity phototherapeutic effects on the human body in situ was carried out. The feature of the work was the measurement of the dynamics of surface temperature changes in a bio-object for 40 min after the cessation of irradiation. The relaxation character of the temperature behavior with quasi-oscillating phenomena during the selected observation period has been established. An explanation of the observed phenomena with the involvement of literature data is proposed. It is shown that 15-min irradiation at a radiation intensity of 14mWcm^?2 is optimal for phototherapy at a wavelength of 640 nm. A conclusion was made about the possibility of considering changes in the local temperature of a bio-object as a correlated parameter to determine the optimal dose of radiation during phototherapy.

     

Anisotropy of young's modulus of cold-rolled titanium

Analysis of the elastic anisotropy of titanium sheet showed that, after plastic deformation in rolling, titanium grains are oriented in such a way that parallel to the rolling plane is a crystal plane inclined at 32 ° to the direction of rolling.     

The elastic anisotropy of permalloy sheet II. Texture of recrystallization

During the recrystallization of rolled permalloy an oriented growth of new grains is observed. The crystals are arranged so that a (100) face is set up parallel to the plane of the plate, and the edge of a [001] cube lies close to the direction of rolling. The formation of a new type of texture also adversely affects the elastic anisotropy of the sheet: the Fourier series which describes the anisotropy after recrystallization then contains a fourth harmonic.     

Specific features of dielectric response in PZT ferroelectric films

Crystallography Reports - Reverse dependences of the permittivity ε′(E =) of Pb(Ti0.45Zr0.53W0.01Cd0.01)O3 ferroelectric films prepared by high-frequency magnetron sputtering on a...     

Structural phase transitions in heteroepitaxial ferroelectric films

The changes in the structural—deformational characteristics occurring during the phase transitions in the crystal lattice of epitaxially grown thin (Ba,Sr)TiO₃ films on the (001) cleavage of MgO crystals have been studied. It is shown that microdeformations along the surface normal of the wall of a c-domain film increase with the temperature and attain maximum values in the vicinity of the phase transition. No decrease in the dimensions of the coherent-scattering regions was observed. The comparison of the deformation of the “average” lattice and microdeformations led to the assumption that the transition from the paraelectric to the ferroelectric phase is accompanied by the dislocation-induced formation of a dipole-glass-type intermediate phase at the temperatures exceeding that of the phase transition.