| 单词 | uranium isotope |
| 释义 | > as lemmasuranium isotope (a) General attributive, as uranium atom, uranium compound, uranium isotope, uranium mine, uranium mining, etc.Some of the more established compounds of this type are treated separately. ΚΠ 1802 T. Thomson Syst. Chem. IV. 39 (table) Ord. XIX. Uranium ores. 1850 H. Watts tr. L. Gmelin Hand-bk. Chem. IV. 160 Many uranium compounds exhibit peculiarities which seem to favour this view. 1868 Proc. Royal Soc. 17 255 The yellow solutions of uranium salts exhibit two absorption-bands in the blue. 1878 W. de W. Abney Treat. Photogr. 155 Printing with iron and uranium compounds. 1908 Science 15 May 799/2 The water in the Austrian uranium mines contains radium of medical value. 1915 G. Martin Mod. Chem. & its Wonders vi. 144 Thus the atomic weight..of the uranium isotope should be 208·4. 1918 Jrnl. Chem. Soc. 114 ii. 346 Assuming that 8% of the uranium atoms disintegrating produce ‘protoactinium’. 1940 G. H. J. Adlam & L. S. Price Higher School Certificate Inorg. Chem. (ed. 2) lvii. 592 Pitchblende..was found to have greater radioactivity than pure uranium salts. 1947 Ann. Amer. Acad. Sci. 249 1/2 The discovery of methods of releasing atomic energy has upset the uranium mining situation. 1964 M. Gowing Brit. & Atomic Energy 1939–45 i. 40 The possibility of producing a nuclear chain reaction depended upon the separation of the uranium isotopes. 1989 Philadelphia Inquirer 17 Dec. a2/2 Battles pointed out the gray scars left on the sandstone mountains by uranium mining. 1997 M. Perutz in N.Y. Rev. Bks. 20 Feb. 40/1 An element of only a little more than half the weight of uranium, which could have formed only by the splitting of the irradiated uranium atoms. 2010 Age (Melbourne) (Nexis) 21 Dec. 17 Paladin already operates two uranium mines in Namibia and Malawi. < as lemmas |
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