1. Centre for Sustainable Technology and Environment (CSTEN), Universiti Tenaga Nasional (UNITEN), Jalan IKRAM-UNITEN 5, 43000 Kajang, Selangor, Malaysia, Tel. ; Fax: , Tel. ; Fax:
2. Food Technology Programme, School of Industrial Technology, Universiti Sains Malaysia, 11800 Gelugor, Penang, Malaysia, Tel. ; Fax:
3. River Engineering and Urban Drainage Research Centre (REDAC), Higher Institution Centre of Excellent (HICoE) for Service, Engineering Campus, Universiti Sains Malaysia, Seri Ampangan, 14300 Nibong Tebal, Penang, Malaysia, Tel. ; Fax: