;Al Bakri Abdullah, Mohd Mustafa, PTech, MMSET, AAE (Faculty of Chemical Engineering Technology, Universiti Malaysia Perlis (UniMAP), Taman Muhibbah, Jejawi, Perlis, Malaysia),Binti Abd Razak, Rafiza
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Abdullah, Ahmad Zuhairi (Universiti Sains Malaysia, Malaysia),Osman, Azlin Fazlina (Universiti Malaysia Perlis, Malaysia)
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