PERUBAHAN AKTIVITAS ANTIOKSIDAN KOPI ARABIKA (Coffea arabica) DARI KABUPATEN MUARA ENIM, KABUPATEN OKU SELATAN, DAN KOTA PAGARALAM AKIBAT PENYANGRAIAN = CHANGE IN ANTIOXIDANT ACTIVITY OF ARABICA COFFEE (Coffea arabica) FROM MUARA ENIM DISTRICT, SOUTH OGAN KOMERING ULU DISTRICT, AND PAGARALAM CITYAS A RESULT OF ROASTING - ATHIRAFITRI, NADIA (2018)