AKTIVITAS ENZIM AMILASE Rattus norvegicus PADA DIET TINGGI SERAT PANGAN : VARIASI pH DAN LAMA PEREBUSAN (AMYLASE ENZYME ACTIVITY Rattus norvegicus ON A DIET HIGH IN FIBER FOOD: VARIATION OF pH AND BOILING TIME) - MAHARDIKA NINGRUM, SESILIA; Jurusan Kimia FMIPA Universitas Negeri Surabaya (UNESA Journal of Chemistry, 2012)