Daniel I. Arnon

Daniel Israel Arnon ( born November 14, 1910 in Warsaw, † December 20, 1994 in Berkeley, California, USA) was an American biologist, biochemist and plant physiologist of Polish descent.

Life

Arnon studied at the University of California at Berkeley with Dennis Robert Hoagland (BS 1932, PhD 1936). He became Assistant Professor in 1941 and 1946 Assoc. Professor of Cell Physiology at the University of California.

Attempt by Arnon

He first separated on the chloroplast and then separated by centrifugation and stromal thylakoids: the thylakoids he was in the aqueous phase light, NADP , ADP, phosphate and Magnesium2 ions. After the reaction, NADPH / H , ATP, and oxygen were present. Arnon discovered in 1954, the photophosphorylation, ie the light-dependent formation of ATP in photosynthesis. In addition, he showed that the oxygen formed during photosynthesis from the oxygen atoms of the water is formed ( the water photolysis ). The stroma he was now to the substances formed in the thylakoid reaction ATP and NADPH / H and CO2. This resulted in glucose, ADP, and NADP . The was a proof that the CO2 is fixed into glucose.

( Publ together with Mary Belle Allen and Frederick Robert Whatley: Photosynthesis by isolated chloroplasts. In: Nature 174 (1954 ): 394-196. )