[The ultrastructure of the parietal exocrinocytes of the glandulae propriae in the gastric mucosa in A avitaminosis].

Electron microscopic and morphometric methods were used to study the state of the parietal exocrinocytes of the proper glands of gastric mucosa in dynamics of A avitaminosis. The experiment was performed in 80 albino rats taken from mother's feeding with the initial body mass 40-50 g, divided into 2 groups. In animals of the first group A-avitaminosis was induced by feeding the animals with semisynthetic diet devoid of vitamin A.

[The ultrastructure of the main exocrinocytes in the glands proper of the gastric mucosa in A avitaminosis].

The electron microscopic and morphometrical methods were used to study the ultrastructural organization of main exocrinocytes of the proper glands of the mucous membrane of the stomach of rats under conditions of A-avitaminosis. Deficiency of vitamin A causes dystrophic alterations of main exocrinocytes. The fragmentation, degranulation and considerable dilatation of cisterns of the granular endoplasmic reticulum, destruction of the Golgi complex membranes, disturbance of the membranous organization of secretory vacuoles were observed.

[The isolation of a concentrated and purified rotavirus preparation by using bentonite].

The preparation obtained when cultivating virus SA-11 in the transplantable cell culture SPEV has been purified and concentrated by means of bentonite. The virus adsorption at acidic values of pH (4.0-4.