Purdue researcher Fred Reginer (right) and Bing Ho, a doctoral student in chemistry, stand next to a liquid chromatograph, an instrument used to separate chemical compounds, as they examine a silicon wafer that contains a scaled-down version of the device. The mini-laboratory is capable of carrying out many of the same types of chemical separations as the full-sized instrument. Reginer has developed a way to place multiple mini-labs on a single silicon chip.(Purdue News Service Photo by David Umberger)