A medical implant that delivers therapeutic via microtubes and a method of making the same is provided. In one embodiment a biologically implantable structure adapted to fit within the body of a patient is provided. This structure may have a plurality of individual microtubes in physical communication with its outer surface, the microtubes containing or carrying a therapeutic. In an alternative embodiment a method of manufacturing an implantable medical appliance is provided. This method includes placing a pliant stratum of microtubes onto a biologically implantable medical structure and then applying a therapeutic to the pliant stratum to cover or fill the microtubes.

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> Device and method for quantitatively determining an analyte, a method for determining an effective size of a molecule, a method for attaching molecules to a substrate, and a device for detecting molecules

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