Max Rubner
| Max Rubner! | |
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Max Rubner
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| Born | 2 June 1854 Munich |
| Died |
27 April 1932 (aged 77) Berlin |
| Nationality | German |
| Fields | physiology |
| Institutions | University of Marburg |
| Alma mater | University of Munich |
| Doctoral advisor |
Adolf von Baeyer Carl von Voit |
| Known for | metabolism |
Max Rubner [ru:bner] (2 June 1854, Munich – 27 April 1932, Berlin) was a German physiologist and hygienist.
He studied at the University of Munich and worked as an assistant under Adolf von Baeyer and Carl von Voit (doctorate 1878). Later on, he taught as a professor at the University of Marburg (1885–91), and in 1891 succeeded Robert Koch as a professor of hygiene at the University of Berlin. In 1909 he succeeded Theodor Wilhelm Engelmann as chair of physiology at Berlin. Rubner was co-founder of the Kaiser-Wilhelm Institut für Arbeitsphysiologie, and became its director in 1913.
Rubner is remembered for his research in metabolism, energy physiology, hygiene and dietary thermogenesis. His best-known research centres on what he termed the "isodynamic law" of calories (demonstrated in 1873, and published a decade later), according to which the form of human calorie intake is irrelevant to its effect on energy balance, often paraphrased as "a calorie is a calorie". In 1902, Rubner expressed his belief that this was over-simplistic, stating "the effect of specific nutritional substances upon the glands" may modify the effect of specific foods on energy balance, a view that is now increasingly accepted. With Otto Heubner (1843-1926), he performed important studies involving energy metabolism in infancy.
In 1883 Rubner introduced the "surface hypothesis", which stated that the metabolic rate of birds and mammals that maintain a steady body temperature is roughly proportional to their body surface area.
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