S. Aronoff, A. Benson, W. Hassid & Melvin Calvin, "Distribution of Carbon-14 in Photosynthesizing Barley Seedlings", 1947.
, Melvin Calvin and colleague Andrew Benson used radioactive carbon-14 to study photosynthesis. The metabolism of carbon dioxide fixation was discovered. Carbon-14 usage in the plant kingdom for the Calvin-Benson cycle discovery. The opposite, carbon-14 usage in the discovery of respiration metabolism by Joseph Katz of Warburg respiration. Respiration and photosynthesis made fundamental usage carbon-14. Continue reading S. Aronoff, A. Benson, W. Hassid & Melvin Calvin, "Distribution of Carbon-14 in Photosynthesizing Barley Seedlings", 1947.