| 单词 | lead iodide |
| 释义 | > as lemmaslead iodide b. In names of chemical compounds, as lead carbonate, lead chloride, lead iodide, lead salts, etc. extracted from leadn.1 lead tetraethyl n. = tetraethyl lead n. at tetra- comb. form 2a(c)(ii). ΚΠ 1868 H. B. Jones & H. Watts Fownes's Man. Elem. Chem. (ed. 10) 451 Lead Chloride..separates as a heavy white crystalline precipitate. 1868 H. B. Jones & H. Watts Fownes's Man. Elem. Chem. (ed. 10) 452 Lead Iodide..dissolves in boiling water. 1868 H. B. Jones & H. Watts Fownes's Man. Elem. Chem. (ed. 10) 453 Lead Carbonate..is sometimes found..crystallized in long white needles, accompanying other metallic ores. 1868 H. B. Jones & H. Watts Fownes's Man. Elem. Chem. (ed. 10) 452 Lead Nitrate. 1887 Jrnl. Chem. Soc. 52 i. 572 Lead tetraethyl, Pb Ph4. 1926 Encycl. Brit. II. 127/2 The tendency to knocking is suppressed by adding to the motor spirit substances such as lead tetra-ethyl which, it is assumed, act by being adsorbed by the ferriferous carbon in the cylinder. 1971 Daily Tel. 28 May (Colour Suppl.) 16/2 The amounts of lead in the environment have increased dramatically since the introduction of lead tetraethyl as a petrol additive in the Twenties... By controlling the rate at which fuel burns, lead tetraethyl promotes smoother ignition. < as lemmas |
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