[The use of rocket immunoelectrophoresis for determining glycoprotein in concentrated rabies vaccines].

Rocket immunoelectrophoresis (RIE) was shown to be useful for the evaluation of glycoprotein (GP) content in concentrated rabies vaccines, and disintegron B., a zwitterionic detergent made in this country, for treatment of the vaccines for these evaluations. The values of GP content obtained by RIE and single radial immunodiffusion test were similar.

[An evaluation of the quality of tetanus anatoxins by gel electrophoresis].

The study of tetanus toxoids obtained from different manufacturers in the USSR has shown that these preparations exhibit molecular heterogeneity. The method of gel filtration has made it possible to find out that tetanus toxoids from different manufacturers differ in the degree of their purification. The preparations produced by the manufacturing enterprises in Perm and Ufa have been found to contain considerably less ballast substances than the preparations produced in Moscow.

[The fractional composition of immunoglobulin preparations studied by gel filtration on different carriers and by high-pressure liquid chromatography].

The fractional composition of immunoglobulin preparations produced by different manufacturing enterprises of this country has been studied by gel chromatography in columns packed with different carriers (Sephadex G-200 and ultragel AcA-34) and by high-performance liquid chromatography (HPLC). This study has revealed the nonstandard character of immunoglobulin preparations produced according to the same technological procedure (modified Cohn's method). The fractionation of immunoglobulins on different carriers with the use of different methods has yielded similar results confirmed by the statistical processing of the data.

[A gel filtration study of the fractional composition of tetanus antitoxic sera].

The fraction composition of tetanus antitoxic sera has been studied by the method of gel filtration in columns packed with Sephadex G-200. Differences in the fraction composition of preparations manufactured by different enterprises have been revealed. The specific activity of antitoxic sera has been found to depend on the degree of their fragmentation.

[Cytotoxic action of the chemical substances found as admixtures in medical immunobiological preparations].

The cytotoxic action (CTA) of chemical substances contained as admixtures in medical immunobiological preparations on human diploid cells has been studied. Such chemical substances as rivanol and merthiolate in admissible concentrations show the highest degree of CTA. The results obtained in this investigation indicate that different concentrations of chemical substances may produce equal CTA; thus, thiolate in toxic in a dose of 0.

[Molecular composition of the fractions of immunoglobulin preparations studied by gel filtration].

The method of gel filtration in columns permitted the separation of aggregated fractions into polymers whose content did not exceed 10% and dimers, their content ranging from 3.6% to 22.11%.

[Physicochemical and biological properties of an allergen from Trichomonas vaginalis].

The chemical and biological characterization of the preparation, found to be strictly specific, is presented. The allergen is nontoxic and has sensitizing properties. The active principle of the preparation is protein.

[Dependence of the specific activity of an immunoglobulin against tick-borne encephalitis on the degree of its fragmentation].

Immunoglobulin preparations against tick-borne encephalitis with the increasing content of Fab-fragments (from 16% to 45%) have been experimentally obtained. As revealed by testing these samples in vivo for specific activity (in the biological neutralization test), the preparations containing 16% of Fab-fragments show no perceptible decrease of specific activity; its sharp decrease (2-16 times) can be observed in preparations with a high degree of fragmentation (the content of Fab-fragments being equal to 30-45%).

[Dependence of the specific activity of antistaphylococcal immunoglobulin on the degree of its fragmentation].

In vitro experiments have revealed no perceptible decrease in the content of antitoxic antibodies to alphastaphylolysin in the preparations of antistaphylococcal immunoglobulin, containing 13-50% of Fab-fragments. These data confirm the necessity of controlling the molecular composition of the preparations of antistaphylococcal IgG by physico-chemical methods with the aim to evaluate their quality, as the fragmented preparations are rapidly eliminated from a human body.

[Dependence of the specific activity of antitetanus immunoglobulin on the degree of its fragmentation].

Antitetanus immunoglobulin preparations with the increasing content of Fab-fragments (15, 30, 53%) have been obtained under specific experimental conditions. Tests for specific activity have revealed an insignificant decrease (13%) in this activity in the preparation containing 15% of Fab-fragments and its sharp drop in the preparations containing 30-50% of Fab-fragments. The specific activity of antitetanus immunoglobulin has been found to be related to the degree of its fragmentation.

[Fractionation of Neisseria allergenic preparations by a gel chromatographic method on sepharose 4B].

The fraction composition of allergens obtained by different methods from the microbial mass of N. meningitidis, N. gonorrhoeae and N.

[Sensitizing properties of bacterial fractions of different chemical compositions].

The sensitizing activity of meningococcal cells and their fractions has been studied. Only protein-containing preparations have been shown to be capable of inducing delayed hypersensitivity, while polysaccharide fractions do not induce it.

[Possibility of using jet injector BI-3 to administer gamma globulin].

Various forms of interaction between diphtheria exotoxin and the continuous L and HeLa cell lines were revealed, depending on its doses: toxic, subtoxic and small (following the subtoxic dose). Cells of the same origin, treated with these doses, develop similar changes in some of their properties, differing only in their "survival" time, the period of adaptation and the time of entering the phase of active proliferation. The systems of cells, having simultaneously low susceptibility to infection with some RNA-containing viruses (L cells with low susceptibility to vesicular stomatitis virus and HeLa cells with low susceptibility to Coxsackie B5 virus) and high susceptibility to repeated treatment with diphtheria exotoxin, hve been obtained.

[Biological and chemical characteristics of allergen preparations from Neisseria (N. meningitidis, N. gonorrhoeae, N. perflava)].

Various methods of isolating allergen fractions from N. meningitidis, N. gonorrhoeae and N.

[Comparative study of allergenic fractions extracted from different strains of staphylococci].

Various methods for obtaining staphylococcus allergens were approbated. Biological activity of the preparation proved to depend on the method of obtaining it determining the chemical compostition of the preparation, and on the properties of the strain used. A method of alkaline extraction and a strain with marked pathogenicity signs (strain 209) can be recommended for the preparation of staphylococcus allergen.

[Characteristics of the biological activity of staphylococcal allergens obtained from various strains laboratory animals].

The authors suggest an optimal scheme of guinea pig sensitization for the assessment of specific activity of staphylococcal allergens. On milliard cells of killed staphylococcal culture are injected to the animals into the paws of the limbs; two and a half weeks later an intradermal test with an allergen in a dose of 10 microgram by protein was made. Differences in the specific activity of staphylococcal allergens prepared of various strains were revealed.

[Effect of chemical action on the biological activity of staphylococcal allergen].

The authors present the results of study of chemical action on the specific properties of staphylococcus allergen showing that deamination, iodation, and formalinization was accompanied by reduction of the allergenic capacity of the preparation; as to acetylation -- it produced an insignificant reduction of the allergen activity.

[Protein sorption with mineral colloids].

A study was made of the effect on sorption of the molecular weight of model proteins (ribonuclease with a molecular weight of 12 10(3), trypsin with a molecular weight of 24-10(3), bovine albumin with a molecular weight of 64-10(3) and gamma-globulin with a molecular weight of 160-10(3)) and dispersity of suspensions of aluminium hydroxide, aluminum phosphate and calcium phosphate used as biopreparation sorbents. The expediency of using phosphate and calcium phosphate used as biopreparation sorbents. The expediency of using for effective sorption of a definite area of sorption surface necessary and adequate for the distribution of protein macromolecules with the best degree of conformational liberty was revealed.

[Fractionation of staphyococcal allergens on sephadex].

Allergens obtained from seven strains of staphylococcus cultures (with and without any toxigenic and hemolytic properties) were subjected to fractionation on Sephadexes. It was shown that allergens from strains 209, 3a, 977 contained one protein-polysaccharide, component with molecular weight of 600 000--900 000. Allergens from strains Wood-46, 150a, r-7, O15 were characterized by the presence of two protein-polysaccharide fractions with molecular weight of 800 000--900 000 (I) and 20 000--100 000 (II).