Adrenocortical and thyroid systems of rats during the initial period of nociceptive influences.

Two phases were identified in the initial period of formation of the adrenocortical reaction to acute nociception. The first phase (at 10-15 sec) consisted of an "urgent" mobilization of the " basal" reserves of hormonally active substances and was characterized by suppression of corticoliberin activity in the hypothalamus and extrahypothalamic brain structures in rats, with a parallel increase in the plasma concentration of adrenocorticotropic hormone, draining of corticosteroid reserves in the adrenals, and decreases in blood corticosterone levels on the background of increases in corticosterone levels in target organs. The second phase, the hypercompensation phase, involved progressive increases in the titers of study substances.

[Interrelations of forest and steppe elements in the fauna of herpetobionts of the middle and lower Don river steppe zone].

Herpetobionts of the forest and steppe biocoenoses were studied in the region of their contact under the conditions of the Middle and Lower Don flow limiting for the forest existence. The species composition of coleopterans of the ravine forests comprises 96 species. The dominant complex of herpetobionts of the steppe and ravine forest biocoenoses includes 13 and 9 species, respectively.