| 单词 |
isoprenoid |
| 释义 |
isoprenoid, a. and n. Chem.|ˈaɪsəprɪnɔɪd, aɪsəʊˈpriːnɔɪd|
[f. prec. + -oid.]
A. adj. Containing or designating the isoprene unit; having a molecular structure composed of such units.
B. n. An isoprenoid compound.
1945Chem. Abstr. XXXIX. 5887/1 Other isoprenoid hydrocarbons, as isoprene, diterpenes, triterpenes, sesquiterpenes, are either entered at their trivial names or named systematically. 1958Proc. Nat. Acad. Sci. XLIV. 167 Squalene synthesis from branched-chain subunits will be treated as a two stage process, namely (a) the condensation of three ‘isoprenoid’ units to a sesquiterpene (C15) [etc.]. 1965New Scientist 24 June 867/2 The branched-chain compounds called isoprenoids, which have a branch every fourth carbon atom. 1971Nature 24 Dec. 449/1 Pristane (2,6,10,14-tetramethylpentadecane) and phytane (2,6,10,14-tetramethylhexadecane), isoprenoid hydrocarbons, which probably arise from diagenetic degradation of algal chlorophylls, were present [in the sediment] in trace amounts. 1972Science 9 June 1121/2 After 2 years, isoprenoids..and alicyclic and aromatic hydrocarbons remained prominent in the polluted sediments. |
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