TY JOUR TI RESEARCH ON THE TECHNOLOGY OF BLACK AND GREEN TEA EXTRACTS WITH ANTIOXIDANT ACTIVITY PRODUCTION: DETERMINATION OF THE EFFECT OF THE DEGREE OF GRINDING OF THE INITIAL RAW MATERIAL ON THE REMOVAL OF ANTIOXIDANT SUBSTANCES KW antioxidant activity KW black tea KW green tea KW phenols KW flavonoids KW tannins KW free radicals KW solvent KW water KW degree of grinding. JO Bulletin of KSAU AU Karpova, M.O. AU Makarova, N.V. AU Budylin, D.V. AU Ignatova, D.F. PY 2021 IS 0 PB Krasnoyarsk State Agrarian University