1. ; Advanced Oleochemical Technology Center; Malaysian Palm Oil Board, No. 6 Persiaran Institusi; Bandar Baru Bangi 43650 Kajang, Selangor Malaysia
2. ; Technical Advisory Services Unit; Malaysian Palm Oil Board; 43650 Kajang, Selangor Malaysia
3. ; Department of Chemistry; University of Malaya; 50603 Kuala Lumpur Malaysia