Optimization of tannic acid extraxtion from Quercus infectoria Galls using aqueous decoction method - Iylia Arina Md. Zaki, 1992- author 644673; Harisun Ya'akob, supervisor 579290; Fakulti Kejuruteraan. Sekolah Kejuruteraan Mekanikal 619080 (Johor Bahru, Johor : Universiti Teknologi Malaysia, 2020)