TY JOUR TI RESEARCH ON THE CHEMICAL COMPOSITION OF FRUIT AND BERRY RAW MATERIALS IN THE NORTH CAUCASUS REGION AS A PROMISING SOURCE OF FOOD AND BIOLOGICALLY ACTIVE SUBSTANCES KW fruit and berry raw materials KW sea buckthorn fruits KW viburnum and blackberries KW biologically active substances KW nutrients KW chemical composition KW quick freezing KW North Caucasus Region JO Bulletin of KSAU AU Hmelevskaya, A.V. AU Sorokopudov, V.N. AU Tetcoeva, D.T. PY 2023 IS 0 PB Krasnoyarsk State Agrarian University