Bioengineering Home   http://www.bioe.psu.edu/ Members   Peter Butler Ryan Clement Cheng Dong Roger Gaumond William Hancock Ahmed A. Heikal Herbert Lipowsky Nadine Barrie Smith John Tarbell Jeffrey Zahn Joint members   Tao Lu Lowe Gerson Rosenberg Christopher Siedlecki Alan J. Snyder Akif Undar William J. Weiss