[Long-term and seasonal dynamics of vitamin D supply indicators for the population of the Western Siberia region].

Despite the active study of vitamin D, today the problem of its insufficient supply remains relevant both in Russia and throughout the world. In our country, the situation is affected by the geographical, climatic, as well as ethnic and cultural characteristics of each region. It is of interest to assess the temporal and territorial characteristics of the population's sufficiency.

Frequency-dependent conversion of the torque of a rotating magnetic field on a ferrofluid confined in a spherical cavity.

The dynamics of magnetic nanoparticles in rotating magnetic fields is studied both experimentally and theoretically. The experimental investigation is focused on the conversion of the magnetic forces to a mechanical torque acting on a ferrofluid confined in a spherical cavity in a rotating magnetic field. Polydispersity usually present in diluted ferrofluids is shown to play a crucial role in the torque conversion.

[Oxygen barotherapy in the combined treatment of patients with chronic ischemic disease].

As many as 20 patients with coronary heart disease (CHD) were examined for the efficacy of oxygen pressure chamber therapy (OPCT) combined with drugs. Optimal modes of OPCT were elaborated. The treatment consisted of 10-15 daily sessions with the partial oxygen pressure 0.