(1884–1971). A Swedish chemist who won the Nobel Prize in 1926. Author of Die Methoden zur Herstellung Kolloider Losungen anorganischer Stoffe. His work included research in colloidal chemistry, molecular size determination, and methods of electrophoresis, as well as the development of the ultracentrifuge for separation of colloidal particles in solution. His education was in Sweden with later work done at the University of Wisconsin before returning to Uppsalla.