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Herrick L. Johnston : ウィキペディア英語版
Herrick L. Johnston

Herrick Lee Johnston (29 March 1898- 6 October 1965) was an American scientist specializing in cryogenics, born in Jacksonville, Ohio.
==University of California==
Johnston was a researcher at the University of California at Berkeley 1925-28 and an associate of cryogenics pioneer William Giauque when his experiments proved the existence of oxygen isotopes with atomic masses 17 and 18. Previously it had been believed that oxygen only existed as 16O; as atomic masses of other elements were calculated on the basis of 16.0 not 16.0035, this was a significant discovery. The work, published in 1929, also led to the discovery in 1939 of heavy hydrogen (deuterium) by Harold C Urey. Giauque was awarded the 1949 Nobel Prize for chemistry for this work, and did not forget to recognize Johnston's contribution.

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