Baltimore, MD (Sept. 10)???Researchers at Johns Hopkins University (JHU, <a href="http://www.jhu.edu/)">http://www.jhu.edu/)</a> have devised a new controlled-delivery system that applies an electrical pulse to release drug molecules, nanoparticles, biopolymers such as peptides and proteins, and protein assemblies such as viruses from thin fabricated gold electrodes.