Macleod, John James Rickard

Macleod, John James Rickard (rĭk`ərd), 1876–1935, Scottish physiologist, educated at Aberdeen and Leipzig. He was a professor at Western Reserve Univ. (1903–18) and at the Univ. of Toronto (1918–28) and later taught at the Univ. of Aberdeen. For the discovery of insulin and the studies of its use in treating diabetes he shared with F. G. Banting the 1923 Nobel Prize in Physiology or Medicine. His works include Diabetes (1913), Physiology and Biochemistry in Modern Medicine (with others, 1918; 9th ed. Macleod's Physiology in Modern Medicine, 1941), and Carbohydrate Metabolism and Insulin (1926).

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Macleod, John James Rickard 

Born Sept. 6, 1876, in Cluny, Perth, Scotland; died Mar. 16, 1935, in Aberdeen. British physiologist.

Macleod studied at Marischal College in Aberdeen and the University of Leipzig. From 1903 to 1918 he worked in the USA; from 1918 he was professor of physiology at the University of Toronto (Canada). He studied the functions of the respiratory center of the brain, experimental glycosuria, the formation of lactic acid, and the sugar content in the blood. Together with F. G. Banting and C. H. Best, Macleod discovered insulin while studying diabetes. He was awarded the Nobel Prize in 1923, jointly with F. G. Banting.