DAYTON, Ohio, Sept. 20 (TNSres) -- University of Dayton issued the following news: A University of Dayton researcher will lead a nearly half-million-dollar National Science Foundation project with the goal of developing a low-cost, hand-held device to test for and identify diseases and biohazards. "Current benchtop equipment retails for more than $100,000 and you can probably have only one in a clinic," said Swapnajit Chakravarty, associate professor of electro-optics and photonics. "We're try  more