Ruzicka, << ROO zheech kah, >> Leopold (1887-1976), a Swiss chemist, shared the 1939 Nobel chemistry prize for his work on the structure of important vegetable products known as higher terpenes. He found that they consist of large rings of carbon atoms. Chemists use his methods in many synthetic and analytical procedures. Ruzicka was born in Vukovar, then part of Austria-Hungary and now in Croatia, and was educated in Zurich, Switzerland. He taught at the University of Utrecht and at the Federal Polytechnic Institute in Zurich.