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He, Yu Hai and Ahmad Ziad, Sulaiman and Azilah, Ajit (2015) Effect of Ultrasound and Enzyme on The Extraction of Eurycoma Longifolia (Tongkat Ali). International Journal of Chemical and Molecular Engineering, 9 (4). pp. 1-21. (Published)
He, Yu Hai and Ahmad Ziad, Sulaiman (2015) Optimization Of Eurycomanone Yield Using Response Surface Methodology By Water Extraction. In: National Conference on Postgraduate Studies (NCON-PGR 2015) , 24-25 January 2015 , Kuantan, Pahang. pp. 1-20..
Chong, Fui Chin and He, Yu Hai and Syed Mohd Saufi, Tuan Chik (2014) Purification of Papain from Unclarified Papaya Juice using Reversed Phase Expanded Bed Adsorption Chromatography (RP-EBAC). Journal of Industrial and Engineering Chemistry, 20 (6). pp. 4293-4297. ISSN 1226-086X. (Published)
He, Yu Hai (2013) Direct recovery of papain from papaya juice using expanded bed adsorption chromatography. Masters thesis, Universiti Malaysia Pahang (Contributors, Thesis advisor: Chong, Fui Chin).