| 单词 | sodium-flame |
| 释义 | > as lemmassodium-flame b. Miscellaneous, as sodium-compound, sodium-flame, sodium vapour (frequently attributive); sodium-amalgam n. a compound of mercury and sodium. sodium-cooled adj. that employs liquid sodium as a coolant; spec. of (a) an aero-engine exhaust valve, or (b) a nuclear reactor. sodium pump n. Physiology a pump (pump n.1 1g) which operates on sodium ions. sodium soap n. soda soap. ΘΚΠ the world > matter > chemistry > elements and compounds > metals > specific elements > sodium > [noun] > compounds soda1826 caustic soda1839 sodium-amalgam1862 the world > matter > physics > atomic nucleus > nuclear fission > nuclear reactor > [adjective] > cooled by liquid sodium sodium-cooled1934 society > occupation and work > equipment > machine > machines which impart power > engine > internal-combustion engine > [adjective] > heating or cooling system thermo-siphon1904 coolant1915 thermo-siphonic1920 sodium-cooled1934 the world > life > biology > biological processes > cellular processes > [noun] > pump pump1947 sodium pump1951 1862 W. A. Miller Elements Chem. (ed. 2) III. 219 The potassium and sodium compounds are more energetic than those of zinc. 1866 W. Odling Lect. Animal Chem. 138 Uric acid, by deoxidation with sodium-amalgam, yields a mixture of xanthine and hypoxanthine. 1879 J. Tyndall Fragm. Sci. (ed. 6) I. xiv. 391 We send our beam of white light through a sodium flame. 1933 Discovery Feb. 50/2 In the construction of sodium vapour lamps this difficulty is overcome by introducing a rare gas into the tube. 1934 Jrnl. Royal Aeronaut. Soc. 38 223 The Americans have attained and even exceeded [500 lbs. per sq. in.]..with a poppet valve (sodium cooled) engine. 1951 Jrnl. Physiol. 114 143 An active sodium pump cannot be ruled out on the grounds that it would require more energy than is available from the resting metabolism. 1954 Sci. Amer. Dec. 38/3 A sodium-cooled reactor, which can be operated at very high temperatures, has greater thermal efficiency than a water-cooled system. 1956 E. Molloy Automobile Engineer's Ref. Bk. iii. 242 In engines where exhaust-valve cooling is a serious problem, the sodium-cooled valve has been adopted. 1964 A. White et al. Princ. Biochem. (ed. 3) xxxvii. 727 In the ascending limb of the hairpin-shaped loop of Henle an outwardly oriented sodium pump..operates. 1968 M. S. Livingston Particle Physics iii. 39 A well-known example [of a multiplet] is the sodium D-line doublet which gives the yellow color to the light from a sodium-vapor lamp. 1971 New Scientist 11 Mar. 529/1 Rudzinski was mainly concerned about the immense complexity of the sodium-cooled technology. 1974 D. Webster & M. Webster Compar. Vertebr. Morphol. ix. 183 Instead of osmotically equilibrating, this imbalance of cations is maintained by the cell membrane's physical characteristics plus an enzyme system, called the sodium pump, which actively removes sodium from inside the cell. 1977 Time 15 Aug. 11/3 What worries them in particular is that Super Phénix will produce energy from a sophisticated sodium-cooled reactor eight times more powerful than smaller, water-cooled plants. < as lemmas |
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