M.V. Shaykhelislamova - Dr.Sc. (Biol.), Professor, Department of Human Health, Kazan (Volga Region) Federal University, Kazan, Tatarstan. E-mail: bettydn@mail.ru N.B. Dikopolskaya - Ph.D. (Biol.), Associate Professor, Department of Human Health, Kazan (Volga Region) Federal University, Kazan, Tatarstan. E-mail: bettydn@mail.ru F.G. Sitdikov - Dr.Sc. (Biol.), Professor, Department of Human Health, Kazan (Volga Region) Federal University, Kazan, Tatarstan. E-mail: fgsitdikov@mail.ru G.A. Bilalova - Ph.D. (Biol.), Associate Professor, Department of Human Health, Kazan (Volga Region) Federal University, Kazan, Tatarstan. E-mail: g.bilalova@mai.ru