1. Malaysian Palm Oil Board 6, Persiaran Institusi, Bandar Baru Bangi, 43000 Kajang Selangor Malaysia
2. School of Chemical Sciences and Food Technology, Faculty of Science and Technology Universiti Kebangsaan Malaysia, UKM Bangi Selangor 43600 Malaysia
3. Department of Biosystems Engineering and Soil Science University of Tennessee 2506 EJ Chapman Drive, Knoxville TN 37996 USA