| 单词 |
polyethylenic |
| 释义 |
polyethylenic, a. Chem.|ˌpɒlɪɛθɪˈliːnɪk|
[ad. F. polyéthylénique (A. Wurtz 1860, in Compt. Rend. L. 1195), f. poly- poly- + éthylène ethylene + -ique -ic.]
†1. Used to designate polymeric compounds prepared from derivatives of ethylene. Cf. polyethylene a. Obs.
1860A. Wurtz in Chem. News 25 Aug. 121/1 Glycolic, lactic, and oxalic acids..are acids of very simple constitution; but such is not the case with those obtained by oxidising the complex glycols, which I have called polyethylenic alcohols. 1878C. M. Tidy Handbk. Mod. Chem. xxiii. 574 By heating glycol with ethylenic oxide in sealed tubes, a series of compounds called polyethylenic glycols (or alcohols) are formed. 1895Jrnl. Chem. Soc. LXVIII. i. 320 Ethylenic oxide and sodium ethoxide..give a product which boils at 110–120°..; this..must therefore be regarded as a complex ethylic polyethylenic oxide.
2. Polyunsaturated; of the nature of polyunsaturation.
1928Proc. R. Soc. A. CXXII. 564 Two polyethylenic acids.., namely, linoleic acid of soya bean or cotton-seed oil..linolenic acid of linseed oil. 1958Jrnl. Sci. of Food & Agric. IX. 777 The polyethylenic C20 and C22 acids, so characteristic of the animal glycerophosphatides. 1964Oceanogr. & Marine Biol. II. 176 The pattern of polyethylenic unsaturation in the fatty acids of marine invertebrates is probably the same as that in fish lipids. 1965E. F. Jansen in Bonner & Varner Plant Biochem. xxv. 655 The hexahydromatricaria ester is included to illustrate the occurrence of homologous polyethylenic compounds. |
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