TY JOUR TI BIOLOGICALLY ACTIVE SUBSTANCE ACCUMULATION IN CONEFLOWER (ECHINACEA PURPUREA L. MOENCH.) UNDER ARTIFICIAL CULTIVATION CONDITIONS KW coneflower (Echinacea purpurea) KW immune stimulant KW hydroxy-cinnamic acids KW biologically active substances JO Bulletin of KSAU AU Doyko, I.V. PY 2013 IS PB Krasnoyarsk State Agrarian University