Congratulations to Craig and Derek on Passing Their Oral Preliminary Exams! January 30, 2017January 30, 2017 in News. Congratulations to Craig and Derek on passing their Oral Preliminary Exams! Derek’s research is focused on the development of sustainable polymers and Craig’s research is focused on the incorporation of natural products into polymers for gene delivery applications. Recommended PostsJuly 1, 2013 Congrats to Mammad on passing his prelim!May 12, 2013 Congrats to Haley, Dustin, Will, She, James, and Jeff on passing their prelims!January 25, 2019 Congratulations to Anatolii for Successfully Defending His Thesis!