fluorine

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fluorine

 (F) [floor´ēn]
a chemical element, atomic number 9, atomic weight 18.998. (See Appendix 6.)
fluorine 18 a radioactive isotope of fluorine, atomic mass 18, having a half-life of 1.8925 hours; it has been used as a tracer in positron emission tomography.

fluor·ine (F),

(flōr'ēn), Avoid the mispronunciation fluorīne.
A gaseous chemical element, atomic no. 9, atomic wt. 18.9984032; 18F (half-life of 1.83 h) is used as a diagnostic aid in various tissue scans.
[L. fluere, flow]

fluor·ine

(F) (flōr-ēn')
A gaseous chemical element; atomic no. 9, atomic weight 18.9984032; 18F (half-life of 1.83 hours) is used as a diagnostic aid in various tissue scans.

fluor·ine

(F) (flōr-ēn')
A gaseous chemical element used as a diagnostic aid in various tissue scans.
References in periodicals archive ?
The traces of an unknown phase can be connected with fluorine compounds, because MicroXRF analysis confirms presence of fluorine in sintered samples (Fig.
7 Kyodo Stella Chemifa Corp., an Osaka-based maker of fluorine compounds, said Tuesday it will begin commercial production of enriched boron
Occidental ignored the toxic chemical safety recommendations spelled out in the Public Health Service/Centers for Disease Control publication, Occupational Diseases: A Guide to their Recognition, which states: "Attention should be given promptly to any burns from fluorine compounds due to absorption of the fluorine at the burn site." Gary and his coworkers were never afforded medical attention nor were they provided with adequate protective equipment.
The fluorine compounds are chiefly used as refrigerants, insulators, spray propellants and in the production of resins and plastics.
Throughout the early part of the 20th century, fluorine compounds were products of industrial processes, such as manufacture of aluminum and other metals, superphosphate fertilizers and ceramics.
Demand for fluorine compounds, in particular, is expected to grow in the coming years for various applications, including the etching process for semiconductor production.