Decay processes of long-lived phonons in 6H-SiC.

Temperature evolution of the high-resolution far-infrared transmission spectra of 6H-SiC single crystal slab is experimentally examined in a temperature range of 5-320 K. Temperature dependences of the phonon lifetimes for long-lived phonons, namely the IR active folded transverse acoustic (FTA) phonon doublet, are determined. These dependences are interpreted in the framework of a theoretical model developed using first principle anharmonic lattice dynamics.

[Polypragmasia and interdrug interactions as risk factors of falling in elderly patients.].

This article presents the results of the analysis of data from patients over 75 years of age from a multidisciplinary hospital with cardiovascular disease and comorbid conditions. Pharmacotherapy of gerontological patients with multiple risk factors for falls was analysed in terms of the presence of polypragmasy and drug-drug interactions hazardous to the risk of falls. In the group of patients who experienced a fall in hospital compared to patients without a fall, the prescription lists audit showed a predominance of medicines (drugs) and drug combinations compromised by an increased risk of this serious adverse event.

Effects of an External Magnetic Field on the Interband and Intraband Optical Properties of an Asymmetric Biconvex Lens-Shaped Quantum Dot.

The theoretical investigation of interband and intraband transitions in an asymmetric biconvex lens-shaped quantum dot are considered in the presence of an external magnetic field. The selection rules for intraband transitions are obtained. The behaviors of linear and nonlinear absorption and photoluminescence spectra are observed for different temperatures and magnetic field strengths.

Stabilization of DNA by sodium and magnesium ions during the synthesis of DNA-bridged gold nanoparticles.

Nanostructures synthesized using DNA-conjugated gold nanoparticles have a wide range of applications in the field of biosensorics. The stability of the DNA duplex plays a critical role as it determines the final geometry of these nanostructures. The main way to control DNA stability is to maintain a high ionic strength of the buffer solution; at the same time, high salt concentrations lead to an aggregation of nanoparticles.

[Initiation of pharmacotherapy as a risk factor for older patients.].

The article presents the literature and original data on the problems of falls in elderly patients. The connection of the fact of falling with initiation of therapy by a number of drugs known to have a negative impact on the risk of falling is considered. The article presents data on the frequency and structure of falls on the example of patients with cardiovascular diseases older than 75 years, treated in a multidisciplinary hospital.