CHARACTERISATION OF CHOLINESTERASE ACTIVITY FROM ASIAN SWAMP EEL; MONOPTERUS ALBUS, AND TESTING ITS CAPABILITIES AS A BIOSENSOR ON METAL ION CONTAMINATION / PENCIRIAN AKTIVITI KOLINESTERES DARI OTOT BELUT SAWAH; MONOPTERUS ALBUS, DAN PENGUJIAN KEUPAYAANNYA SEBAGAI BIOPENANDA TERHADAP PENCEMARAN ION LOGAM. Jurnal Teknologi (Sciences & Engineering), v. 82, n. 5, 17 Aug.2020.