| 释义 |
Millon, n. Biochem. and Chem.
(ˈmɪlən, ‖ mijɔ̃)
[The name of Auguste Nicolas Eugène Millon (1812–67), French chemist.]
Used attrib. and in the possessive in Millon's base, a yellow basic powder, Hg2NOH.2H2O , produced by the action of aqueous ammonia on mercuric oxide (as reported by Millon in Ann. de Chim. et de Physique (1846) XVIII. 393); Millon('s) reaction, the characteristic reaction of Millon's reagent with phenolic compounds, in which a white precipitate is produced which becomes pink or reddish on heating (described by Millon for a phenolic protein in Compt. Rend. (1849) XXVIII. 40); Millon's reagent, a clear solution of mercuric nitrate containing some nitrous acid, used in Millon's test; Millon's test, Millon's reaction employed as a test for phenols, esp. for proteins containing tyrosine.
1872Chem. News 2 Aug. 59/1 (title) Estimation of urea by means of Millon's Reagent. 1875A. Gamgee tr. Hermann's Elem. Human Physiol. i. 32 Mercuric nitrate, in the presence of a little nitrous acid, at 60°C., colours the albuminous bodies red (Millon's reaction). 1883Encycl. Brit. XVI. 34/1 The product is a yellow solid base (‘Millon's base’) of the composition N2H6 + 4HgO + H2O = N2Hg4O.2H2O + 2H2O . 1891Larkin & Leigh Outl. Pract. Physiological Chem. (ed. 2) 11 Millon's test. No reaction if pure. 1951Acta Crystallogr. IV. 156 The structure of Millon's base, Hg2NOH.2H2O , consists of a three-dimensional framework Hg2N+ in an idealized cristobalite type of arrangement. 1960Jrnl. Histochem. & Cytochem. VIII. 4/2 The Millon reaction has been criticized because of the low pH to which tissues are necessarily subjected. 1978Acta Chimica Acad. Sci. Hungaricae XCVIII. 329 Millon's reagent was prepared from mercury (II) nitrate and potassium nitrite. 1987G. & S. Toole Understanding Biol. for Advanced Level iii. 32/2 Millon's Test detects the amino acid tyrosine and will therefore only give a positive result with proteins possessing it. |