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单词 reprecipitation
释义

reprecipitationn.

Brit. /riːprᵻˌsɪpᵻˈteɪʃn/, U.S. /ˌripriˌsɪpəˈteɪʃ(ə)n/, /ˌriprəˌsɪpəˈteɪʃ(ə)n/
Origin: Formed within English, by derivation. Etymons: re- prefix, precipitation n.
Etymology: < re- prefix + precipitation n., probably after reprecipitate v.
Chiefly Chemistry.
The action of precipitating or being precipitated again; precipitation following dissolution (cf. reprecipitate v.); an instance of this.
ΘΚΠ
the world > matter > chemistry > chemical reactions or processes > [noun] > chemical reactions or processes (named) > precipitation > reprecipitation
reprecipitation1819
the world > movement > motion in a certain direction > downward motion > falling > [noun] > steep or swift fall > again
reprecipitation1819
1819 Monthly Mag. 48 72/2 If not perfectly pure, it [sc. strychnine] may be rendered so by solution in acetic or muriatic acid, and re-precipitation by potash or magnesia.
1879 M. Oliphant Hist. Reign George II II. 383 The sudden fall and rising and reprecipitation into the abyss.
1922 F. W. Aston Isotopes 4 It may have been partly effected in geological ages by successive solutions and reprecipitations of the various earths.
1977 A. Hallam Planet Earth 81/2 When the water contains carbon dioxide..the calcium carbonate is converted into calcium bicarbonate..—this reaction is reversible, loss of carbon dioxide leading to reprecipitation of calcium carbonate.
1996 Hydrobiologia 317 1 Copper, Zn and Pb, which show an affinity for the organic component of the shell, may thus accumulate by repeated dissolution and reprecipitation of the shell during the lifetime of an individual organism.
This entry has been updated (OED Third Edition, December 2009; most recently modified version published online March 2022).
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n.1819
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