Donald J. Cram, a Nobel Prize-winning chemist who taught and conducted research at UCLA for more than 50 years and is remembered by thousands of undergraduates for singing and playing his guitar in class, died of cancer June 17 at his home in Palm Desert. He was 82. A renowned scientist who was as comfortable riding the waves with friends in the San Onofre Surfing Club as he was in his lab constructing complex molecular models, Cram won the Nobel Prize in 1987 and the National Medal of Science in 1993 for his work in host-guest chemistry, a field he helped to create. In 1998, he was ranked among the 75 most important chemists of the past 75 years by Chemical and Engineering News. His work opened broad new avenues for exploration across organic chemistry, with applications in basic research as well as in fields such as pharmaceutical production.

Traugott Heinrich Karl Frederking, an expert in the field of cryogenics and professor emeritus of chemical engineering, died June 2 in Los Angeles. He was 74. A native of Germany, Frederking received a Ph.D. in mechanical engineering from the Swiss Institute of Technology in Zurich in 1960. In 1962, he joined UCLA's engineering school. Frederking and his wife, Dorothea, were extremely active in the engineering school and founded the Endowed Fund for Cryogenics Research at UCLA in 1998.