1. Dept. of Food Science; Faculty of Food Science and Technology; Univ. Putra Malaysia; 43400 Serdang Malaysia
2. Biotechnology Research Centre; MARDI Headquarters; Serdang P.O. Box 12301 50744 Kuala Lumpur Malaysia
3. Laboratory of Natural Products; Inst. of Bioscience; Univ. Putra Malaysia; 43400 Serdang Malaysia
4. Dept. of Pharmaceutical Chemistry; Faculty of Pharmacy; Intl. Islamic Univ. Malaysia; 25200 Kuantan Malaysia