N. S. Johari, I. Ahmad, and N. Halib b,c,* School of Chemical Science and Food Technology, Faculty of Science and Technology, University Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, Malaysia Medical Technology Division, Malaysian Nuclear Agency, Bangi, 43000 Kajang, Selangor, Malaysia Faculty of Dentistry, Universiti sains Islam Malaysia (USIM), 15 Floor, Menara B, Persiaran MPAJ, Pandan In...