| 词汇 | benzene |
| 释义 | benzene noun[ U ] uk /ˈben.ziːn/ us /ˈben.ziːn/ a clear liquid made from petroleum, from which plastics and many chemical products can be made苯 Chemicals, chemical compounds & gases acetic acid acrolein acrylamide activated charcoal adenine agglomerate cyanide ethyl alcohol glyphosate H2O HCFC HFC hyaluronic acid hydrochloric acid laughing gas limescale meths oxyacetylene prussic acid tartaric acid Benzene, a substance compounded of carbon and hydrogen, obtained by destructive distillation from coal-tar and other organic bodies, used as a substitute for turpentine and for dissolving grease. If you are after the greatest yield of tar products, you impoverish the gas by taking out the benzene and get a blue instead of a bright yellow flame. It is very soluble in water, easily soluble in boiling alcohol, much less in cold alcohol, and insoluble in ether, chloroform and benzene. Remove paint stains with benzene or turpentine, machine oil with cold water and Ivory soap, vaseline with turpentine. Six atoms of carbon and six of hydrogen put together in a certain way make benzene. benzene | American Dictionarybenzene noun[ U ] us/ˈben·zin/ chemistry a colorless liquid made from petroleum (= thick oil from under the ground), from which plastics and many chemical products can be made Examples of benzenebenzene Apart from the benzene alcohols, theaspirene was the compound with the highest concentration in the wines of all three varieties in 2003 vintage. This sample also contained elevated levels of benzene, ethylbenzene, toluene, and xylenes. Solvent removal during curing process of highly spheric and monodispersed-sized polystyrene capsules from densitymatched emulsions composed of water and benzene/1, 2-dichloroethane. This breakthrough came about through the availability of the benzene ring theory. In surface soils, the ratio of formic acid to benzene increases with decreasing precipitation, suggesting a high degree of oxidation at the driest site. In a classic example, they used an organic solvent called pazoxyanisole and benzene as a solute. For example, we are informed by the researchers that people with lung cancer tend to exhale a mixture of alkanes and benzene derivatives. The combined benzene solutions were washed five times with 2 ml of water. Thousands of people will have seen such images without ever connecting this to the chemical structure of benzene. Indications were also found of the anaerobic biodegradation of benzene within the aquifer. In a real experiment obvious candidates for such molecules are benzene, other aromatic compounds, or even nanotubes. Once benzene is produced, the synthesis of more complex compounds occurs via simple substitution or addition reactions. For example, benzene measurements were made but high cross-sensitivity to carbon monoxide meant that the results were invalid. Closely related to the benzene ring were its condensed forms, naphthalene and anthracene. The lower, middle, and upper layers were a sodium hyposulfite -glycerin solution, a water-glycerin solution, and benzene, respectively. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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