This volume contains the proceedings of Symposia LL and MM of the 2011 MRS Fall Meeting, held November 28-December 2 in Boston, Massachusetts. "Synthetic and Biological Gels" (Symposium LL) focused on advances made in the field and demonstrated the growing importance of these materials in a wide variety of applications. Insights were reported concerning the structural and dynamic properties of molecular and polymeric gels as well as dispersions in...