1. Nanotechnology and Catalysis Research Center, Institute of Graduate Studies, University of Malaya, Kuala Lumpur, Malaysia
2. Faculty of Pharmacy, Universitas Gadjah Mada, Yogyakarta, Indonesia
3. Department of Animal Products Technology, Faculty of Animal Science, Universitas Gadjah Mada, Yogyakarta, Indonesia
4. Centre for Research in Biotechnology for Agriculture, University of Malaya, Kuala Lumpur, Malaysia