Russel Henry Chittenden (1856-1943) After graduation, Chittenden
traveled to Heidelberg, where he worked with the notable enzyme
chemist Wilhelm Kühne (1837-1900; first to refer to organic
catalysts as "enzymes" in 1878). Surprisingly, Kühne had read
Chittenden's article on glycogen in scallops. In his memoirs,
Chittenden recalled: Chittenden attended classes in advanced
chemistry (given by Professor Robert W. Bunsen--the Bunsen
burner bears his name), anatomy, surgery, and pathology, and
visited German laboratories where he met distinguished
researchers. The year's experience at Heidelberg resulted in
three publications and influenced his approach to science. In
1880, Chittenden received the first PhD degree in physiological
chemistry from an American university (Yale). Two years later,
he became Professor of Physiological Chemistry at Sheffield, a
post he held for the next 40 years. Chittenden published 144
scientific papers, including a text on nutrition with special
reference to protein requirements (Chit