| 释义 |
oxal-
combining element in chemical terms, used in the sense ‘derived from or related to oxalic acid’, or ‘containing the radical oxalyl’.
oxalaˈcetic acid, a dicarboxylic acid, HOOC·CO·CH2·COOH, which crystallizes as an enol form and is produced in vivo by transamination from aspartic acid and in the Krebs cycle by oxidation of malic acid; so oxaˈlacetate, the anion, or an ester or salt of, oxalacetic acid. ‖ oxalæmia |ɒksəˈliːmɪə| Path. [mod.L., f. Gr. αἷµα blood]: see quot. oˈxalamide = oxamide. ˈoxalan [-an 2; cf. alloxan] = oxaluramide. oxaˈlantin [cf. alloxantin]: see quot. oxaˈlethyline, a poisonous oily liquid of composition C6H10N2; also, a general name for the series to which this belongs, as chloroxalethyline C6H9ClN2. oxalˈhydric acid, a former name for saccharic acid; hence oxalˈhydrate, a salt of this acid, a saccharate. ˈoxalite Min. = humboldtine. Also oxaluramide, oxalyl, etc.
1891Jrnl. Chem. Soc. LX. 1333 On mixing..a benzene solution of carbon oxychloride with copper *oxalacetate..the copper salt takes up an appreciable quantity of chlorine. 1969Oxalacetate [see glyoxylate].
1896Jrnl. Chem. Soc. LXX. i. 599 Nef's ethylic ethoxyfumarate..when hydrolysed with hydrochloric acid, gives *oxalacetic acid. 1939Ann. Reg. 1938 375 In the biological fixation of nitrogen by root nodule bacteria the formation of aspartic acid via the oxime of oxalacetic acid was confirmed. 1972Arch. Biochem. & Biophysics CLIII. 226/1 Oxalacetic acid..functions as a key substrate in metabolism as the keto form; however, the pure compound crystallizes as the cis enol of hydroxymaleic acid.
1892Syd. Soc. Lex., *Oxalæmia, the presence of oxalates in the blood; a doubtful condition.
1836–41Brande Chem. (ed. 5) 1181 When oxalate of ammonia is distilled..the liquid which passes over contains a flocculent substance,..to which M. Dumas has given the name of *oxalamide.
1866–77Watts Dict. Chem. IV. 248 *Oxalan, syn. with Oxaluramide.
Ibid., *Oxalantin, C6H4N4O5..is related to parabanic acid in the same manner as alloxantin..to alloxan.
1881Ibid. VIII. 1450 *Oxalethylines.
1838T. Thomson Chem. Org. Bodies 75 The *oxalhydrate of lead which fell was collected on a filter and thoroughly washed with water.
Ibid., The *oxalhydric acid is a new and peculiar acid.
1866–77Watts Dict. Chem. IV. 277 *Oxalite, native ferrous oxalate, also called Humboldtine. |