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John S. Wishnok is a principal research scientist and director of mass spectrometry at the Massachusetts Institute of Technolo gy's Division of Toxicology. Wishnok re ceived a B.A. degree in chemistry from the College of Wooster (Ohio) and earned an M.A.T. degree and a Ph.D. in chemistry from Brown University. He then spent two years as a postdoctoral fellow with Paul Schleyer at Princeton University, after which he taught organic chemistry at Bos ton University for four years. He has been at MIT since 1974.
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