Polymeric materials are now playing an increasingly important role in pharmaceuticals, as well as in sensing devices, in situ prostheses and probes, and microparticle diagnostic agents. This new volume consists of twenty-two recent research-based reports on the developments in these areas of pharmaceutical and biomaterials technology. The reports were prepared by top scientists in the field and are based on current research conducted at leading laboratories in the U.S.A., Europe, and Asia. These 22 chapters report the latest information in the application of polymers to biological systems.