Preparation and characterization of biodegradable polymer films from naturally occuring polymers by UV and Gamma radiation / Zinia Nasreen [PhD Thesis] Nasreen, Zinia Ultraviolet rays 535.014 NAP Thesis (Ph.D.) -- Department of Applied Chemistry and Chemical Engineering, 2005-2006 Includes bibliographical references. Dhaka : University of Dhaka, 2011. 2011. 2011 Text vii, 139 p. : eng