Hakim Bangun obtained Ph.D. degree from Faculty of Pharmaceutical Sciences, The University of Tokushima, Japan on 1990. Since 1980 he has been working as academic staf at Faculty of Pharmacy, University of Sumatera Utara. He became Professor of Pharmaceutical Technolog/Physical Pharmacy on 1999. His research interest is about the application of alginate in pharmaceutical preparation, such as enteric capsules, gastroretentive drug delivery system, drug encapsulation, gastric delivery system, sustained release, nano capsules, peridental gel etc. He also interests about the biological activities of alginate.