[Anomalies in the development and functioning of the reproductive system in Siberian sturgeon, Acipenser baerii Brandt (Acipenseridae), from the Yenisei River].

Based upon long-term studies, the alterations in the development and functioning of the reproductive system in the Yenisei River Siberian sturgeon are analyzed. Primary attention is paid to the malfunctions of gametogenesis during trophoplasmatic growth of the oocytes. Some anomalies were revealed for the first time in the studied population. However, these anomalies are typical for other populations of this species. These anomalies are not species-specific and may be found in other representatives of the family Acipenseridae.

[Histological characteristics of the reactions of cerebral neuroglia in laboratory animals]. / Gistologicheskaia kharakteristika reaktsii neiroglii golovnogo mozga laboratornykh zhivotnykh.

Literature data and the authors' results, concerning structural and functional peculiarities of all varieties of the cerebral neuroglia under effect of a cranial-cerebral trauma, neurotropic chemical products and oxygen insufficiency have been considered. Ideas that neuroglial reactions under the conditions mentioned are proved to be constant and in dependence of certain peculiarities of each case are either progressive or regressive. The reaction degree is mainly proportional to the disturbance power. Nevertheless, certain discrepancies (ariactivity including) can be observed; this is also determined by a combination of prerequisites and by a peculiarity of individual reactivity of the CNS. The greatest stability of astroglia has been stated. Possible variations in relation between changes of neurons and gliocytes are mentioned. Suggestions are made that diffuse-focal progressive reactions of macroglia under conditions of neurotoxicoses can be determined not by proliferation of cells, but by their migration.