| 释义 |
dioxin Chem.|daɪˈɒksɪn|
[f. dioxy-, diox- + -in1.]
a. Any of three unsaturated heterocyclic compounds, two having the formula C4H6O2 and the third C4H4O2; spec. p-dioxadiene, C4H4O2, a liquid.
1919Chem. Abstr.: Decennial Index I–X 2841/2 Dioxin. 1939Jrnl. Amer. Chem. Soc. LXI. 3020/1 Dioxadiene, although hitherto unknown, has long been listed in chemical abstracts under the name of Dioxin. It is used as the fundamental or parent nucleus for the cataloging of dioxane, dioxene, and their derivatives.
b. Any of numerous derivatives of dioxin; spec. = tetrachlorodibenzo(-p-)dioxin s.v. tetra- 2 a.
1970, etc. [see tetrachlorodibenzoparadioxin s.v. tetra- 2 a]. 1970New Yorker 14 Mar. 124/3 Extensive teratogenic, or fetus-deforming, effects were discovered in chick embryos when the dioxin, or a distillate predominantly consisting of it, was present at concentrations of little more than a trillionth of a gram per gram of the egg. 1974Sci. Amer. Apr. 50/1 The committee found no hard evidence of human illness or of congenital malformations attributable to the herbicides, although 2,4,5-T in particular, and its contaminant, dioxin, have been seriously implicated in animal studies. 1976Nature 19 Aug. 637/1 The dioxin TCDD is a contaminant present in 2,4,5-T at levels variously estimated at between 0.07 and 50 p.p.m. 1978, etc. [see tetrachlorodibenzoparadioxine s.v. tetra- 2 a]. 1980Science 24 Oct. 386/2 The term chlorinated dibenzo-p-dioxins, or more simply chlorinated dioxins, refers to 75 compounds or any combination of the 75. 1986St. Louis (Missouri) Post-Dispatch 28 May 7a/3 The Illinois court reversed a multi-million-dollar verdict in a suit over a spill of dioxin in Sturgeon, Mo. |