Konstantin Nosov

The dynamic systems discrete modeling of the chronic heart failure origins symptomatology of teenagers is conducted. Models, reflecting the structure of intercomponent and incomponent relations between the values of aldosterone, noradrenalinum, faction of the leftventricles troop landing after physical activity, index of the left ventricles eventual diastole volume after physical activity are built. They correspond to the modern ideas about the chronic heart failure origins mechanisms.

The main issues of biosafety of eutrophicated water reservoirs, which are used as drinking-water sources, are related with the risk of mass development of toxic cyanobacteria. The factor of this risk is, in particular, a character of feedbacks in zooplankton, some species of which in the course of their nutrition eliminate repre-sentatives of phytoplankton. In turn, these representatives are the competitors to cyanobacteria and saturate water with the products of their metabolism – nutrients for phytoplankton. The authors describe the relations for these species, which open the new approaches to the prediction of the risk of mass development of cyanobacteria in eutrophicated hydrobiocoenoses.