July 27, 1962: Conrad Elvehjem, University of Wisconsin president, died on this date after suffering a heart attack in his Bascom Hall office. Elvehjem, born on May 27, 1901 in McFarland, was a distinguished biochemist, gaining prominence for his research in nutrition and vitamin B complex work. He isolated nicotinic acid which lead directly to the cure for human pellagra in the late 1930s.