| 词汇 | fluorine |
| 释义 | fluorine noun[ U ] uk /ˈflɔː.riːn/ us /ˈflɔːr.iːn/(symbolF) a chemical element that is a poisonous, pale yellow gas氟 Chemical elements actinium alkali metal americium antimony astatine berkelium brimstone bromine calcium germanium lithium manganese nickel plutonium quicksilver selenium silicon sodium sulphur transition metal Arsenic combines with fluorine at the ordinary temperature with incandescence. Nitric acid vapor reacts with great violence with fluorine, a loud explosion resulting. Perhaps this may be explained by the fact that fluorine has no action at available temperatures upon carbon dioxide. The corresponding negative group consists only of fluorine and manganese, so far as our investigations have gone. The element fluorine has at last been successfully isolated, and its chief chemical and physical properties determined. Examples of fluorinefluorine Statistics and morphology of typical damages of the foil and its resistance to fluorine etching were investigated. A more potent device may be a mixture of liquid fluorine and hydrogen at very low temperatures. This can be seen as a continuum superimposed on fluorine ion lines. The compositions of magmatic phlogopite and apatite indicate the presence of water and fluorine in the melt. The continuum appearing at higher energy is mainly due to fluorine ions. However, fluorine and chlorine will be the easiest gases to use for any initial tests of available negative ion current densities from practical sources. Fluorine is highly mobile and can be rapidly flushed from the affected areas by rainfall. Fluorine-i8 labelled flurodeoxyglucose has been shown to be effective in differentiating malignant from benign tumours and in determining the extent of disease. It was also described as chronic dental fluorosis; that is to say, a disease of the teeth caused by fluorine. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Or, alternatively, are any benefits to health from better teeth cancelled out by other toxic effects of fluorine? From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 No one can doubt that fluorine is a very noxious and corrosive gas. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Fluorine is a natural environmental contaminant and both feeding stuffs and water for livestock contain fluorides. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 As for sulphur dioxide and fluorine compounds, they were doing studies on their influence on plant growth and crops. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 The obvious way out is to find some way of giving fluorine, with it admitted benefits, to children during their formative years. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 He came to the conclusion that a considerable number of deaths which then took place were due to fluorine poisoning. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 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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