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 ?
Increased demand for air-conditioning units and vehicle-based fluorine gasses, particularly in the southern regions of China however has allowed the industry to make a strong comeback.
Two rhodium-catalyzed preparations of isoquinolines that incorporate fluorine and trifluoromethyl groups are shown in Scheme 16.
Although the plasma density would not be directly proportional to the atomic fluorine density, there would be a strong relation between them.
In the CHMs, fluorine components are introduced by firstly forming the SR-FVI and then concerning with cross-linking reactions.
Moreover, chloroform can potentially form hydrogen bonds with the fluorine in perfluoroalkyl iodide [58].
The contact angles of water with the DLC film surface before and after fluorine doping are presented in Figure 4.
Abstract Fluorine-containing poly-styrene-acrylate (PSA) latex with core-shell structure was successfully synthesized by seeded semicontinuous emulsion polymerization using fluorine monomer Actyflon-Go4 and reactive emulsifier DNS-86.
Geologists have found surprisingly high amounts of the elements fluorine and chlorine in Siberian lavas dating back 250 million years--when about 90 percent of marine species and 70 percent of terrestrial species went extinct.
International Isotopes Fluorine Products Inc., a wholly owned subsidiary of International Isotopes Inc., submitted an application Dec.
Alfa Aesar offers thousands of additional fluorine compounds from its catalogue of over 30,000 products.
Japanese researchers have studied and verified the presence of fluorine in tea beverages, saying that prolonged consumption of tea drinks could weaken human bones.
More than one reviewer has called this book almost a "who-done-it," with secret agendas, billions of dollars in profit, America's global military domination, the very industrial sinews of the United States' industrial power bound up irretrievably in the cheap and reckless use of an incredibly powerful and dangerous chemical: fluorine. With the stakes involved, it is easy to see that human lives, health, agriculture, livestock, the economies of countless towns and villages, to say nothing of families, would take a distant second place to interests far afield from the damage being caused.