TY JOUR TI Changes of antioxidant activity and active compounds content in selected teas KW Tea infusion KW FRAP KW DPPH KW polyphenols KW flavonoids KW brewing time JO Foods and Raw Materials AU Kolodziej, B.. AU Danuta, S.. AU Katarzyna, L.. PY 2020 IS 8 PB Кемеровский государственный университет