1. Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
2. Integrated Chemical BioPhysics Research, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
3. Centre of Foundation Studies for Agricultural Sciences, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia