[Effects of gamma-irradiation on the cardiovascular system of sheep]. / Vliianie vozdeistviia gamma-oblucheniia na serdechno-sosudistuiu sistemu ovets.

In experiments with sheep, the response of the vascular system of the mammals to the total exposure dose was studied. A dose increase resulted in a more pronounced impairment of contraction of the cardiac muscle. In response, a compensatory reaction of the peripheral vessels was intensified up to LD50/30. Higher doses led to a complete disorder in the regulatory apparatus of the circulatory system.

[An evaluation of the biological action of increased doses of EMI in the UV range on the functional state and productivity of sheep]. / Otsenka biologicheskogo deistviia povyshennykh doz EMI UF-diapazona na funktsional'noe sostoianie i produktivnost' ovets.

The effect of increased UV-radiation doses modeling 25 and 50% of ozone layer depletion on sheep's organisms was studied in the field experiment. The character of changes in animal organisms was found to depend on irradiation doses, sensitivity of individual system of living organism to electromagnetic radiation and physiological peculiarities of protection.

[Biological and ecological aspects of the effects combined electromagnetic rays on farm animals]. / Biologicheskie i ékologicheskie aspekty deistviia kombinirovannykh élektromagnitnykh izluchenii (émi) na sel'skokhoziaistvennykh zhivotnykh.

The study of a biological effect of ultraviolet, ultrahigh frequency and gamma-radiation, as well as combinations of these, on the functional status of the sheep body systems has made it possible to evaluate the sensitivity of a body exposed to these factors and its adaptive potentials. The pattern of variations in the body systems when a combined EMR is applied depends on to which extent one or another factor dominates the others. It is however possible that the effect of the leading factor is modified by that of a less severe radiation, energy characteristics of which differ from those of the dominating factor.

[The effect of increased levels of chronic UVB-radiation on the functional state of the body in sheep]. / Vliianie povyshennykh urovnei UF-izlucheniia zony B na funktsional'noe sostoianie organizma ovets pri ego khronicheskom deistvii.

The effect of increased doses of UV-B-radiation produced by LER-40 lamps (with an intensity of 5.5 W/m2 at a daily dose of 20 kJ/m2 and a total dose for 15 days of 300 kJ/m2) on the cardiovascular function, biochemical, biophysical and structural parameters of blood plasma and cells of sheep was investigated. It was found that increased UV-B-radiation produced functional changes in different physiological systems of animals: arrhythmias, diastole shortening, increase of the systole-diastole index; decrease of platelet count, shortening of blood coagulation time; increase of calcium, iron and copper and decrease of zinc in plasma; conformational changes in cytoplasmic membranes of platelets and lymphocytes. The changes that occurred in the sheep at an early stage of exposure can be viewed as adaptive. However, functional changes that were seen at remote stages suggested that the sensitivity of various systems of the body to UV-B-radiation was different.

[Release of myoglobin in the blood of irradiated swine showing decreased activity of various enzymes--markers of muscle tissue injury]. / Vybros mioglobina v krov' obluchennykh svinei pri snizhenii aktivnosti v krovi riada fermentov--markerov povrezhdeniia myshechnoi tkani.

Dynamics of changes in the level of myoglobin, hematological indices, and activity of certain enzymes (lactate dehydrogenase, hydroxybutyrate dehydrogenase, and creatine phosphokinase) was studied in blood of exposed (103.2 mC/kg) pigs. As the activity of enzymes decreased the myoglobin content of blood increased 5-7 days following irradiation. The effect of radiation was shown to promote the development of hypoxia in the animal body which was indicated by the ECG changes, the release of functionally deficient erythrocytes to blood, and the occurrence of stable vast hemorrhages.