[Relationship between bovine serum composition and its capacity to stimulate cell culture growth]. / Sviaz' mezhdu sostavom syvorotki krupnogo rogatogo skota i ee sposobnost'iu stimulirovat' rost kletochnykh kul'tur.

A relationship has been studied between the growth-stimulating activity and chemical composition of bovine serum (BS) that is widely used for cell culture growth and virus replication. A direct correlation was shown between the growth-promoting activity of bovine serum, manifested on the model of chick embryo fibroblasts, and the contents of phospholipids, total lipids, proteins, and calcium in this serum. A significant inverse association has also been revealed between the growth-promoting activity of the serum and the amounts of cholesterol and glucose in this.

[Production of monospecific serum against secretory IgA (anti-SC) and a standard for quantitative analysis]. / Poluchenie monospetsificheskoi syvorotki protiv sekretornogo IgA (anti-SC) i standarta dlia kolichestvennogo analize

The authors describe a method of obtaining monospecific serum against secretory IgA and the corresponding standard. An immunochemically pure (11.6S) secretory human IgA was extracted from the colostrum by salt fractionation and gel-filtration through Sephadex G-200 and Sepharose 6B; this IgA was used as an antigen for the immunization and the standard for the quantitative determination of SIgA in the secretions. Monospecific anti-SC-serum was obtained by successive exhaustion of the antiserum against the S IgA immunosorbents prepared from normal human serum and the serum of a patient suffering from A myeloma containing polymeric IgA forms.