[The wavelet-analysis of non-stationary heart rate variability during out head-up tilt test].

Heart rate variability (HRV) during the head-up tilt test (HUT) was investigated using an automated set of dynamic positioning in the gravitational field. The theory of wavelets is applied to find the dynamics of changes in the spectral properties of rhythmogran during the transitional phases of HUT. Quantitative parameters (spectral integrals, instantaneous maximal frequencies, nonstationarity factors), that describe transitive stages of such non-stationary head-up tilt test, are calculated.

[Metabolism of nuclear proteins during hormone-dependent cell differentiation in the mammae of goats].

The metabolism of nuclear proteins was studied at differentiation of mammary cells in the tissue culture with lactogenic hormones. The synthesis of nuclear acidic proteins under the influence of insulin is shown to be an initial step in cell differentiation of the gland; later the DNA synthesis is stimulated, and the synthesis and phosphorylation of histones are intestified. The inducing action of prolactin on the synthesis of RNA and casein is displayed only after the action of insulin and hydrocortisone on the tissue.