Harold Urey | |
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.jpg) Urey in 1934 | |
| Born | Harold Clayton Urey April 29, 1893 Walkerton, Indiana, U.S. |
| Died | January 5, 1981 (aged 87) San Diego, California, U.S. |
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| Scientific career | |
| Fields | Physical chemistry |
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| Doctoral advisor | Gilbert N. Lewis |
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Harold Clayton Urey ForMemRS (/ˈjʊəri/ YOOR-ee; April 29, 1893 – January 5, 1981) was an American physical chemist whose pioneering work on isotopes earned him the Nobel Prize in Chemistry in 1934 for the discovery of deuterium. He played a significant role in the development of the atom bomb, as well as contributing to theories on the development of organic life from non-living matter.[1]
Born in Walkerton, Indiana, Urey studied thermodynamics under Gilbert N. Lewis at the University of California, Berkeley. After he received his PhD in 1923, he was awarded a fellowship by the American-Scandinavian Foundation to study at the Niels Bohr Institute in Copenhagen. He was a research associate at Johns Hopkins University before becoming an associate professor of chemistry at Columbia University. In 1931, he began work with the separation of isotopes that resulted in the discovery of deuterium.
During World War II, Urey turned his knowledge of isotope separation to the problem of uranium enrichment. He headed the group located at Columbia University that developed isotope separation using gaseous diffusion. The method was successfully developed, becoming the sole method used in the early post-war period. After the war, Urey became professor of chemistry at the Institute for Nuclear Studies, and later Ryerson professor of chemistry at the University of Chicago.
Urey speculated that the early terrestrial atmosphere was composed of ammonia, methane, and hydrogen. One of his Chicago graduate students was Stanley L. Miller, who showed in the Miller–Urey experiment that, if such a mixture were exposed to electric sparks and water, it can interact to produce amino acids, commonly considered the building blocks of life. Work with isotopes of oxygen led to pioneering the new field of paleoclimatic research. In 1958, he accepted a post as a professor at large at the new University of California, San Diego (UCSD), where he helped create the science faculty. He was one of the founding members of UCSD's school of chemistry, which was created in 1960. He became increasingly interested in space science, and when Apollo 11 returned Moon rock samples from the Moon, Urey examined them at the Lunar Receiving Laboratory. Lunar astronaut Harrison Schmitt said that Urey approached him as a volunteer for a one-way mission to the Moon, stating "I will go, and I don't care if I don't come back."[2]
- ^ Miller, S. L.; Oró, J. (1981). "Harold C. Urey 1893–1981". Journal of Molecular Evolution. 17 (5): 263–264. Bibcode:1981JMolE..17..263M. doi:10.1007/BF01795747. PMID 7024560. S2CID 10807049.
- ^ Harrison "Jack" Schmitt – 1903–1969 Wrights to Armstrong (YouTube video posted February 29, 2016, by the Florida Institute for Human & Machine Cognition)