Chang Lu (IMAGE) Purdue University Caption Purdue researcher Chang Lu, from left, and Hsiang-Yu Wang demonstrate a low-powered laser used to view a microchip through a microscope. Wang, a graduate student in chemical engineering, is a member of Lu's research team. Lu's research could lead to advances in drug and gene screening and early disease diagnosis. Credit Purdue Agricultural Communication photo/Tom Campbell Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.