Immobilization of candida rugosa lipase on biogenic silica/magnetite/graphene oxide ternary nanocomposite for esterification synthesis of ethyl valerate - Adikwu Gowon Jacob, 1980-, Gowon Adikwu Jacob, author 643485; Roswanira Ab. Wahab, supervisor 608904; Fakulti Sains 8004 (Johor Bahru, Johor : Universiti Teknologi Malaysia, 2022)