UJI AKTIVITAS ANTIOKSIDAN FRAKSI ETIL ASETAT, KLOROFORM, PETROLEUM ETER, DAN N-HEKSANA HASIL HIDROLISIS EKSTRAK METANOL MIKROALGA Chlorella sp - Anggraeni, Ony Novia (Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan, 2014)