April 20 Chemical engineering, Vasilios Manousiothakis, Department of Chemical and Biomolecular Engineering, University of California, 3:30 p.m., Swearingen Engineering Center, Faculty Lounge.

April 21 Chemistry and biochemistry, "Molecular Plasmonics for Surface Enhanced Sensing and Spectroscopy," Richard van Duyne, Northwestern University, 4 p.m., Jones Physical Sciences Center, Room 006. Refreshments at 3:45 p.m.

April 20 Physics and astronomy, Daryl Bohning, Department of Radiology, Medical University of South Carolina, 4 p.m., Jones Physical Sciences Center, Room 409.

April 24 Biological sciences, "The untapped biology of marine plasmids: new insights into diversity, function, and horizontal gene transfer," Patty Sobecky, Georgia Tech, 4 p.m., Coker Life Sciences, Room 005.

April 25 Physics and astronomy, Manzar Ashtari, medical engineer and physicist, Albert Einstein College of Medicine, Long Island Jewish Medical Center, and Zucker Hillside Hospital, 4 p.m., Jones Physical Sciences Center, Room 409. Refreshments at 3:45 p.m.

April 27 Center for Public Health Preparedness, Lunch and Learn, "Emergency Preparedness in Nursing Homes: What Have We Learned from Hurricane Katrina?," Sarah Laditka, Carol B. Cornman, Courtney B. Davis. 12:30-1:30 p.m., Harper College, Gressette Room. Lunch will be provided.

April 27 Physics and astronomy, John Safko, professor in Department of Physics and Astronomy at USC, 4 p.m., Jones Physical Sciences Center, Room 409.

May 4 Chemical engineering, Cllifford L. Henderson, School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 3:30 p.m., Swearingen Engineering Center, Faculty Lounge.

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