Geostatistical Analysis Methods for Estimation of Environmental Data Homogeneity.

The methodology for assessing the spatial homogeneity of ecosystems with the possibility of subsequent zoning of territories in terms of the degree of disturbance of the environment is considered in the study. The degree of pollution of the water body was reconstructed on the basis of hydrochemical monitoring data and information on the level of the technogenic load in one year. As a result, the greatest environmental stress zones were isolated and correct zoning using geostatistical analysis techniques was proved.

New properties of immunotropic preparation from porcine skin.

We studied new immunological and physicochemical properties of K-activin, immunotropic preparation from porcine skin isolated by the acetone method. The preparation restored the sensitivity of background rosette-forming cells in the spleen of thymectomized mice to the inhibitory effect of azathioprine in vivo and practically normalized serum thymic activity reduced in thymectomized mice. The molecular weight of proteins present in K-activin and previously detected by SDS-PAAG electrophoresis was determined by MALDI mass spectrometry

[Chronic nonspecific lung diseases, immunological deficiency and the means of its correction].

Ninety-eight patients with different patterns of chronic nonspecific pulmonary diseases (CNPD) were examined for thymus-dependent immunity. The clinical manifestations of T lymphocyte dysfunction included a torpid recurrent inflammatory process in the respiratory system, respiratory viral infections, short-term efficacy of antibacterial drugs. The patients demonstrated a decrease in the number of T lymphocytes, in production of immune interferon, and in secretion of serum thymic humoral factor.

[Effect of T-activin on thymocyte reproduction and migration].

Forty seven F1 (CBA X C57Bl) mice were used for quantitative morphologic examination of the thymus on 1, 5, 10 and 15 days after a single injection of 0.5 microgram T-activin, and injections of 0.1 microgram of T-activin once a day during 5 days.

[Bioelectrical activity of the neuromuscular and sympathetic systems exposed to a constant magnetic field].

The experiments on an isolated frog neuromuscular preparation gave evidence that an exposure to stable magnetic fields of 1000-4000 Oe did not influence the time parameters, amplitude and pattern of the action potentials of the gastrocnemius muscle induced by ischiatic nerve stimulation with single impulses. Similar results were obtained from an analysis of electric responses of the upper cervical sympathetic mode to the stimulation of preganglionar fibers in in situ experiments on urethane anesthesized rabbits subjected to a total exposure of a stable magnetic field (500-3000 Oe). In addition, an exposure to a stable magnetic field of 4000 Oe brought about a decrease of the level of depression of the action potential of muscles after conditioning tetanus.