biological molecules

Gold 'Nanoplugs' Wire Up Enzymes

Researchers have devised a way to use gold nanoparticles as tiny electrical wires to plug enzymes into electrodes. The gold “nanoplugs” help align the molecules for optimal binding and provide a conductive pathway for the flow of electrons. The research, described in the March 21, 2003, issue of Science, may yield more sensitive, inexpensive, noninvasive detectors for measuring biological molecules, including, potentially, agents of bioterrorism.

Miniature spectrometer can detect biological hazards

Researchers at the Department of Energy’s Oak Ridge National Laboratory have developed a miniature device that can identify as little as a fraction of a spore of anthrax and other biological hazards within 30 milliseconds. Such prompt detection and identification of hazardous materials could greatly enhance the protection of first-responder emergency personnel and the capabilities of early warning systems.