S.A. Lebedeva - Ph.D. (Biol.), Junior Research Sciences, JSC «All-Russian centre of science on safety of biologically active substances», Staraya Kupavna, Russia. E-mail: lebedeva502@yandex.ru
F.B. Litvin - Dr. Sc. (Biol.), Smolensk State Academy of Physical Culture, Sport and Tourism, Smolensk, Russia
A.Z. Shakhmardanov - Ph.D. (Biol.), Hiding Research Sciences, All-Russian scientific research Institute of physiology, biochemistry and nutrition of farm animals, Borovsk, Russia