Research of the structure and dynamic interactions of particles in the Li0.42K0.58NO3- R (R = α-Al2O3, γ-Al2O3, SiO2) and (LiNO3-LiClO4) - γ-Al2O3 composites in various temperature conditions and phase states.

The paper presents a comprehensive study of the Li0.42K0.58NO3- R (R = α-Al2O3, γ-Al2O3, SiO2) and (LiNO3 - LiClO4) - γ- Al2O3 composite salt systems by vibrational spectroscopy, X-ray diffractometry, and differential scanning calorimetry. According to the results of Raman spectra and XRD analysis, it has been found that in the case of a sufficiently small filler (15 nm-γ-Al2O3 and SiO2), an amorphous phase appears, both for systems based on Li0.42K0.58NO3 and for the nanocomposite based on (LiNO3)0.5-(LiClO4)0.5. In the case of nanocomposites based on the Li0.42K0.58NO3 system, this additionally leads to the formation of the metastable KNO3 (R3m) phase. The temperature changes in the half-widths of the corresponding bands of the Raman spectrum during the transition from a solid-phase to a molten state become less significant as the concentration of the oxide filler increases. At x ≥ 0.7, on the temperature dependences of the half-width of the ν1 (A) band in the vicinity of the melting point, only a small kink characteristic of amorphous systems is noticed. This is confirmed by the results of thermal analysis. It has been found that the solid filler has a different effect on the processes of orientational and vibrational relaxation in the molten phases of the studied NIS, namely, the orientational mobility of NO3- decreases, while the relaxation rate of its vibrational excitation increases.

Multicaloric effect in a multiferroic composite of Gd5(Si,Ge)4 microparticles embedded into a ferroelectric PVDF matrix.

The coupling between electric, magnetic and elastic features in multiferroic materials is an emerging field in materials science, with important applications on alternative solid-state cooling technologies, energy harvesting and sensors/actuators. In this direction, we developed a thorough investigation of a multiferroic composite, comprising magnetocaloric/magnetostrictive Gd[Formula: see text]Si[Formula: see text]Ge[Formula: see text] microparticles blended into a piezo- and pyroelectric poly(vinylidene) fluoride (PVDF) matrix. Using a simple solvent casting technique, the formation and stabilization of PVDF electroactive phases are improved when the filler content increases from 2 to 12 weight fraction (wt.%). This effect greatly contributes to the magnetoelectric (ME) coupling, with the ME coefficient [Formula: see text] increasing from 0.3 V/cm.Oe to 2.2 V/cm.Oe, by increasing the amount of magnetic material. In addition, magnetic measurements revealed that the ME-coupling has influenced the magnetocaloric effect via a contribution from the electroactive polymer and hence leading to a multicaloric effect. These results contribute to the development of multifunctional systems for novel technologies.

[Use of erbium laser for treatment of dental implant complications].

The paper presents the results of the use of Er:YAG laser for surgical treatment of 48 patients aged 25-73 years with early and late dental implant complications were presented. Among all lasers used in the field of dentistry, the Er:YAG laser seems to possess characteristics most suitable for oral treatment, due to its ability to ablate both soft and hard tissues as well as bacterial biofilms and calculus without causing major thermal damage to the adjacent tissue.

[Experimental study of dental implants with nanostructured non-resorbable coating integration into bone tissue].

In 2 dogs on both sides of mandible premolars were removed. In 3 months after dental alveolus healing intraosseous screwdriver dental implants (Konmet, Russia) were installed in the place of the removed teeth. Analogous operation was done on the contralateral side: the same type of implants were installed but with new nanostructured multifunctional biocompatible non-resorbable coating (MBNC) of the Ti-Ca-P-C-O-N composition. The animals were taken out of the experiment in 4 months after implants installation and implant-bone blocks were studied by SEM-method. According to the SEM-data in the region of the contact of implant-bone without new MBNC only fibrous connective tissue was formed. In case when MBNC was used the close welding of bone tissue with implant surface was observed that was considered as sign of osteointegration.

[Post-traumatic stress disorder by wounded persons with traumatic disease].

Was effectuated a complex clinical-psychological observe of 303 wounded military servicemen. Among them there were separated 5 groups in order of character and strength of psychic manifestations (without features of psychic disadaptation, with psychological stress reactions, pathological psychogenic reactions, posttraumatic stress disorders and long neurotic reactions). Common in structure educed psychic disorders was dominating of psychological and neurotic disorders. Straight correlation between heaviness of wounds and character of psychic disorders was absent. It bears record to necessity of realizing of rehabilitation measures for all wounded persons, without reference to level of damage and existence of psychic disorders, and for almost healthy.

[Current features of a mastoiditis course].

A clinical course of mastoiditis according to recent literature data is characterized, therapeutic policy is discussed. The results of mastoidectomies made in the ENT clinic of the Moscow State Medical University in 2004-2007 are reviewed retrospectively.

[The biopsy of preimplantation embryos obtained from donor pigs with follicle-stimulating hormone-induced superovulation]. / Biopsiia doimplantatsionnykh émbrionov, poluchennykh ot svinei-donorov s vyzvannoi follikulostimuliruiushchim gormonom superovuliatsiei.

We have examined possible use of the follicle-stimulating hormone (FSH) for the induction of superovulation in pigs and studied the effect of biopsy of preimplantation pig embryos on their survival in vitro. Superovulation was induced by injecting FSH twice daily over a period of four days for a total dose of 25 units. per animal. Pigs receiving pregnant mare serum gonadotropin (PMSG) according to the standard scheme served as the control. The experiments demonstrated that FSH produces significantly better estrus figures as compared with PMSG (100% and 60%, respectively; p < 0.05). The mean number of ovulations per donor was also better in the FSH group, i.e., 36.5 as compared with 17.3 in the control group (p < 0.05). The mean number of embryos obtained from one donor was higher in FSH treated animals as compared with the animals that received PMSG (29.2 vs. 19.3), however, this difference was not statistically significant. Biopsy of preimplantation pig embryos was conducted by a "manual" technique without a micromanipulator; middle blastocysts collected at days 5-6 after insemination were the most convenient for this operation. Embryos at these developmental stages contained a well developed inner cell mass, which allows separation of trophoectodermal cells only, thus minimizing damage to the embryo. The number of cells in dissected fragments did not depend on the stage of development, and even smallest fragments (4 blastomeres) were sufficient for genome analysis with the aid of PCR. The survival of embryos in vitro after biopsy practically did not differ from that of control intact embryos. Thus, we demonstrated the effective use of FSH for the induction of superovulation in pigs; we also determined the developmental stages which are most convenient for conducting biopsies and developed a technique for preimplantation biopsy, which allows genome analysis of embryos without any decrease of their survival in vitro.

Computer-based patient records and mathematical processing: Brain-UniCard system experience.

The ways of usage of the data from Brain-UniCard Computer-based Patient Records in biomedical and statistical studies is discussed. Mathematical procedures used in computer program are presented. Problems of data presentation for advanced biomedical studies are discussed with the examples of studies of patients with brain traumas and diseases.