[The histostructure of the adrenal gland in the Campbell hamster after extirpation of a specific midventral gland]. / Izuchenie gistostruktury nadpochechnika khomiachka Kémpbella pri ékstirpatsii spetsificheskoi srednebriushnoi zhelezy.

We studied the histological structure of the adrenal glands within four months after extirpation of the midabdominal gland in newborn hamsters. Structural changes of the cells in all zones of the adrenal cortex suggest development of a compensatory reaction to the midabdominal gland extirpation. Hence, the midabdominal gland was a component of the complex of endocrine glands and synthesizes, in all likelihood, some precursors of steroid hormones and, thus, fulfilled both the exocrine and endocrine functions.

[The development of the pouch-like structures at the angles of the mouth in the ontogeny of the hamster Phodopus campbelli]. / Razvitie meshkovidnykh obrazovanii uglov rta v ontogeneze khomiachkov Kémpbella (Phodopus campbelli).

The development of mouth angle sacciform structure was studied in the ontogenesis of hamster Phodopus campbelli. It was found that the true sacciform structure with all components characteristic for adult animals was formed by the 20th day of postnatal development. Histological data have shown than the sacciform structure is formed in ontogenesis as a result of a complex epidermal transformation involving muscular and connective tissues which comprise the external coat. The structure studied is not formed on the basis of sebaceous glands and cannot be assigned to the class of gland as considered before.

[Repair of cranial defects with regenerating bone during transplantation of gamma-irradiated bone filings]. / Zameshchenie defektov cherepa regeneriruiushchei kost'iu pri transplantatsii gamma-obluchennykh kostnykh opilok.

The authors studied in dog experiments the possibility of repairing cranial defects with allografts of bone filings obtained under unsterile conditions, frozen at -70 degrees C, and sterilized by gamma-irradiation in a dose of 3.5 mrad. It was found that though gamma-irradiation reduced the osteogenic inducing property of the bone filings allografts, they nevertheless were capable of inducing bone regeneration in the region of the bone defect. Frozen and gamma-irradiated bone filings can be recommended for cranioplasty.

[Nuclear apparatus of the oocyte and accessory cells in the oogenesis of 2 ant species]. / Iadernyi apparat ootsita i vspomogatel'nykh kletok v oogeneze dvukh vidov murav'ev

The accessory nuclei are present throughout vitellogenesis. They originate from the oocyte nucleus. Structurally they resembe nuclei and, besides, their inclusions contain RNA of nucleolar origin. But the inclusions of accessory nuclei are Feulgen-negative.