The Department of Homeland Security is backing research on lab-on-a-chip sensors that might guard the nation’s food supply better than the current system of tamper-resistant lids and freshness dates. Whitaker investigator David Beebe, Ph.D., of the University of Wisconsin-Madison has developed a process to make on-demand, miniature sensors for a wide variety of poisons, including naturally occurring contaminants and intentionally introduced toxins.
