| 单词 | osmic acid |
| 释义 | > as lemmasosmic acid osmic acid n. (a) osmium tetroxide, OsO4; a solution of this, used esp. as a biological stain for lipids and as a fixative for microscopy; (b) the acid H2OsO4, known chiefly in solution or in the form of its salts (osmates). ΘΚΠ the world > matter > chemistry > chemical substances > acids > [noun] > acids-named > containing osmium osmic acid1842 osmiamic acid1852 1842 T. Graham Elements Chem. ii. v. 692 Osmic acid, OsO4, or the volatile oxide of osmium is best obtained by the combustion of osmium in a glass tube through which a stream of oxygen gas is passed [etc.]. 1879 H. E. Roscoe & C. Schorlemmer Treat. Chem. II. ii. 458 In addition to these the salts of osmic acid, H2OsO4, are known, but neither the acid nor the corresponding oxide, OsO3, have been prepared. 1913 Proc. Royal Soc. 1912–13 B. 86 389 Many methods of fixation have been tried, principally with the view of obtaining a better fixation of blood parasites. The Method described below..is more faithful than even osmic acid. 1950 N. V. Sidgwick Chem. Elements II. 1499 Hexavalent osmium... There are two binary compounds..and a considerable number of complex salts, all of which are in some sense derivatives of osmic acid H2OsO4. 1991 Acta Neuropathologica 81 540/2 For the post-embedding method, specimens from the frontal lobe fixed in the same way were post-fixed with 2% osmic acid and processed for epoxy resin embedding. < as lemmas |
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