[Concentration of hepatitis A and B virus antigens using water-soluble polymers].

A possibility of using reversibly sedimented polymeric system for the concentration of hepatitis A and B virus antigen has been demonstrated. As polymeric systems, tetrasole-containing polyelectrolytes and interpolymeric complex polymethacryl acid-poly-1-vinylpyrrolidone were used, capable of sedimenting in acid medium and dissolving in media with the neutral pH.

[Clinical laboratory research on the properties of Aquafresh toothpaste].

The study of the teeth in 35 patients with chronic catarrhal generalized gingivitis and periodontitis of moderate severity using tooth paste Aquafresh for a months confirmed high cleansing, antiinflammatory and refreshing potential of the paste which, moreover, has a good taste and mint flavor. Laboratory tests showed low abrasibility of the paste, its ability to raise by 12.5% the resistance of the enamel to demineralizing action of the lemon juice.

[The histological structure of the adrenals in three species of desert rodents].

Distinctions of the histological structure of the adrenal gland are especially pronounced in the order of rodents where even the generally accepted scheme of the zonal nature of the adrenal cortex proves to be insufficient for description. Under study was the histological structure of the adrenal of the gopher Spermophilopsis leptodactylus L., jerboa Dipus sagitta Pall.