RADNOR, Pa.--(BUSINESS WIRE)--PolyMedix, Inc. (OTC BB: PYMX, www.polymedix.com), an emerging biotechnology company developing acute care products for infectious diseases and acute cardiovascular disorders, and the University of Massachusetts at Amherst, Department of Polymer Sciences and Engineering, announced today that they have received a NIH grant to support the development of antimicrobial defensin-mimetic compounds for biodefense and emerging food-borne infectious diseases.