instrumental in the discovery of several of the most successful pharmaceutical products including Zocor for high cholesterol; Trusopt, for glaucoma; Aggrastat, for unstable angina; and Crixivan and Sustiva, for HIV/AIDS. Dr. Anderson obtained his B.S. in chemistry from the University of Vermont and a Ph.D. from the University of New Hampshire.

Louis E. Brus (NAS) is a professor of chemistry at Columbia University. He has been a pioneer in the synthesis, size control, and spectroscopy of nanometer-scale semiconductor crystallites. His elucidation of quantum-size effects in these materials is central to our understanding of the transition between molecular and bulk behavior. He received a B.S. in chemical physics from Rice University and his Ph.D. in chemical physics from Columbia University.

Sylvia T. Ceyer (NAS) is the J. C. Sheehan Professor of Chemistry at the Massachusetts Institute of Technology. Dr. Ceyer is a physical chemist with research interests in the area of molecule-surface reaction dynamics as related to heterogeneous catalysis, chemical vapor deposition, and plasma etching chemistry. She has uncovered sources of the apparent lack of surface reactivity under ultrahigh-vacuum conditions and then used that knowledge to effect high-pressure heterogeneous catalytic reactions in an ultrahigh-vacuum environment where microscopic reaction steps can be discerned. She received a B.A. from Hope College and a Ph.D. from the University of California, Berkeley.

Gregory R. Choppin joined the faculty at Florida State University in 1956 and from 1968 to 1976 served as chairman of the Department of Chemistry. He is a Robert O. Lawton Distinguished Professor of Chemistry at Florida State University. He received his B.S. degree in chemistry from Loyola University of the South and his Ph.D. from the University of Texas in Austin. His major research interests are inorganic and nuclear chemistry with emphasis on the lanthanide and actinide elements. Potentiometry, calorimetry, Nuclear Magnetic Resonance, and optical spectroscopy are among the methods used in his laboratory to study the thermodynamics and kinetics of complexation and redox behavior of these elements. A major focus of his laboratory is on the separation science of actinides and the environmental speciation of actinides by inorganic and organic ligands.

Catherine C. Fenselau is a professor of chemistry and biochemistry at the University of Maryland, College Park. She has been a pioneer in the application of mass spectrometry in biomedical research. Her current interests include the use of proteomic strategies to investigate cellular mechanisms of acquired drug resistance and as the basis for detection and analysis of

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