Dr. Harrison is one of the first authors with three co-authors of the highly acclaimed textbook 鈥淏ioseparations Science and Engineering鈥� which has been adopted for courses at more than 60 universities throughout the world. Before becoming a professor in the University of Oklahoma School of 91成人短视频, Biological and Materials Engineering, he worked at Phillips Petroleum Company and Upjohn where he focused on bioseparations.