LaFeNiO perovskites in the catalytic reaction of high-temperature decomposition of nitrous oxide.

The catalytic performance of LaFeNiO perovskites prepared by the Pechini method was studied in the high-temperature decomposition reaction of nitrous oxide at temperatures of 750-900 °C. The samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), adsorption () and hydrogen thermo-programmed reduction (H-TPR) methods. The prepared single-phase solids with specific surface areas of 4.

[Early orthodontic treatment of children with dentofacial anomalies in the mixed dentition with the use of fixed appliances].

The article summarizes the authors experience in the treatment of patients with dentofacial anomalies in mixed dentition with fixed orthodontic appliances ("system 2×4") and combined treatment type with the use of extraoral device. Indications and contraindications, advantages and disadvantages, special conditions of the treatment, the mechanism of a face-bow action with extraoral traction, the sequence of events during the treatment are described in the article. Clinical cases of early treatment with "system 2×4" and in combination with the face-bow and extraoral traction demonstrate the effectiveness of the methods.

[EMG functional changes in masticatory muscles by elastopositioner use in patients with TMJ dysfunction].

The analysis of the results of EMG studies in patients with TMJ dysfunction was carried out before and after use of elastpositioner "Corrector". The study revealed significant functional disturbances of the masticatory muscles, which were corrected after applying elastpositioner: there was a trend to decreased activity of masseter and temporal muscles, especially in the stagе of rest.