[Sexual dysfunction in men with depressive disorders].

In this article, the authors summarize literature data about sexual dysfunction in depression in men. Prevalence, clinical issues and pathogenesis of sexual dysfunction in patients with affective disorders are described. The incidence of depression is steadily growing, and the structure of depressive disorders is becoming more complicated.

Comparative analysis of the kinetics of DNA synthesis after exposure during different phases of the cell cycle S period.

The kinetics of DNA synthesis in the mitotic cycle of mouse corneal epithelial cells was studied after a single γ-irradiation of cells in a dose of 4 Gy at different S-phase points. Normally, corneal epitheliocyte S phase consists of S1 and S2 phases separated by an interval during which no DNA is synthesized. The duration of each phase was lengthened after single irradiation due to reparation of injuries in the cells at the expense of the time normally occupied by g1 period of the mitotic cycle.

Effect of irradiation on DNA synthetic period of the mitotic cycle in cells.

Kinetics of DNA synthesis in mitotic cycle of mouse corneal epithelial cells after single γ-irradiation (4 Gy) at the end of S period was studied by the method of radioautography. Normally, S period of corneal epithelial cells consists of several stages separated by intervals without DNA synthesis. The estimated mean duration of the first (S(1)) and second (S(2)) phases of S period was 16 and 10 h, respectively, and the interval between them was 7 h.

Experimental approaches to evaluating the point of biological system bifurcation.

Any system transforms into a qualitatively new state if the number of its elements changes (increases or decreases in comparison with the standard checkpoint: norm, previous status of the system, etc.) by at least 1/3.