[Features of the intestinal microbiota in the elderly in the development of coronary heart disease.].

The review is devoted to the influence of the microbiota on the development of such an age-dependent disease as coronary heart disease, the formation of which depends on atherogenesis in particular. According to the World Health Organization, cardiovascular disease is the leading cause of death worldwide. Statistical data from the Federal State Statistics Service also confirm that coronary heart disease is the leading cause of death in the Russian Federation today.

Stimulated transitions between the self-trapped states of the nonlinear Schrödinger equation.

We investigate a particle confined within a double-well potential, its behavior described by a one-dimensional nonlinear Schrödinger equation. Transitions between the two lowest self-trapped states of this system are studied, in the two-mode approximation, under the influence of the external time-dependent perturbation. If the perturbation is harmonic in time, with the frequency omega, then transitions between the states become possible if the amplitude of the perturbation F exceeds some threshold value F(c)(omega); above this threshold motion of the system becomes chaotic.