The Effect of Sodium Hydroxide on Drag Reduction using a Biopolymer. Harvin Kaur A/P Gurchran Singh, Dr. Azuraien Jaafar and Dr. Suzana Yusup MATEC Web of Conferences, 13 (2014) 02030 Published online: 17 July 2014 DOI: 10.1051/matecconf/20141302030