| 单词 |
carboxylate |
| 释义 |
▪ I. carboxylate, n. Chem.|kɑːˈbɒksɪleɪt|
[f. carboxyl n. + -ate1.]
a. A salt or ester of a carboxylic acid.
b. The ion {b1}COO- derived from the carboxyl group; an ion R·COO- derived similarly from a carboxylic acid.
[1881Jrnl. Chem. Soc. XL. 266 Ammonium resocarboxylate forms concentric needles, very soluble in water.] 1884Roscoe & Schorlemmer Treat. Chem. III. ii. 627 Potassium Carboxylates. The normal salt, C10H4O10 , is red in colour and is obtained by the oxidation of the black potassium dihydrocarboxylate. 1913Jrnl. Soc. Dyers & Colourists XXIX. 172/1 (heading) The application of β-naphthol carboxylates in dyeing and printing. 1951C. R. Noller Chem. Org. Compounds x. 152 In the carboxylate ion the primary bonds between the carbon atom and the three groups to which it is attached are formed by the presence of two electrons in each of three σ-type orbitals. 1970R. W. McGilvery Biochem. xiv. 282 Carbon dioxide may be attached to a biotinyl group on an enzyme with a concomitant cleavage of ATP, followed by transfer of the resultant carboxylate group to another compound. 1983Norman & Waddington Mod. Org. Chem. (ed. 4) iv. 64 The carboxylate ion, RCO2- , in which the charge is delocalised, is relatively more stable.
▪ II. carboxylate, v. Biochem.|kɑːˈbɒksɪleɪt|
[Back-formation from *carboxylation n.]
trans. To introduce a carboxyl group into (a molecule or compound); to convert into by carboxylation.
1934in Webster. 1981Dugas & Penney Bioorganic Chem. vii. 469 The urea carboxylase component of ATP-amidolyase..reversibly carboxylates urea to form N-carboxyurea. 1988L. Stryer Biochem. (ed. 3) xx. 484 ATP is used to carboxylate acetyl CoA to malonyl CoA.
Hence carˈboxylating ppl. a.
1962Calvin & Bassham Photosynthesis of Carbon Compounds 51 (table) Carboxylating enzyme. 1982M. J. Dring Biol. Marine Plants iii. 65 In red, brown and green seaweeds..RuBP-Case is the dominant carboxylating enzyme. |
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