[The intraspecific differentiation of Przhewalski's horse and the domestic horse by 5 molecular genetic markers]. / Vnutrividovaia differentsiatsiia loshadi Przheval'skogo i domashnei loshadi po piati molekuliarno-geneticheskim markeram.

Analysis of albumin, transferrin, receptor to vitamin D, esterase, alpha 1-beta glycoprotein polymorphisms in Przhewalski's horse, Orlov's and Russian trotters, Guzul and Yakutian domestic horse breeds was carried out. The data about similarity of intraspecies differentiation of Przewalski's horse's populations and interbreed distinctions were obtained. Locus-specific particularities of genetic structures of investigated animal groups were revealed.

[Study of the possibility of stabilizing a levorin microbiological standard]. / Izuchenie vozmozhnosti stabilizatsii mikrobiologicheskogo standarta levorina.

The effect of a number of factors, providing increased stability of the levorin microbiological standard was studied. It was shown that air-tight packing and inert gas atmosphere (antibiotic storage in ampoules sealed under nitrogen) significantly increased the antibiotic stability. It was also shown that hydrochinone had the highest positive effect on levorin stability.