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]

fluorine

/flu·o·rine/ (F) (floor´ēn) a chemical element, at. no. 9.

fluorine (F)

[floo͡r′ēn, flo̅o̅′ərēn]
Etymology: L, fluere, to flow
an element of the halogen family and the most reactive of the nonmetals. Its atomic number is 9, and its atomic mass is 19.00. It occurs in nature only as a component of substances such as fluorspar, cryolite, and phosphate rocks. It can be prepared by the electrolytic decomposition of hydrogen fluoride and in its pure form is a pale yellow toxic gas 1.6 times heavier than air. It is also a component of very stable fluorocarbons used in the manufacture of resins and plastics. As a component of fluorides, it is widely distributed throughout the soils of the earth, enters plants, is ingested by humans, and is absorbed from the GI tract. Fluorides in the atmosphere and industrial dust are absorbed by the lungs and the skin. Relatively soluble compounds, such as sodium fluoride, are almost completely absorbed by humans. The relatively insoluble compounds, such as cryolite, are poorly absorbed. Small amounts of sodium fluoride are added to the water supply of many communities to harden tooth enamel and decrease dental caries. Excessive amounts of fluoride can mottle tooth enamel and cause osteosclerosis. Acute fluoride poisoning and death can result from the accidental ingestion of insecticides and rodenticides containing fluoride salts.

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.

fluorine

(flŏŏr´ēn),
n an element of the halogen family and the most reactive of the nonmetals. Its atomic number is 9, and its atomic weight is 19. Small amounts of sodium fluoride added to the public water supply will reduce the incidence of dental caries, particularly among children. Excessive amounts of fluoride can mottle tooth enamel and cause osteosclerosis. Acute fluoride poisoning can cause death.

fluorine

a chemical element, atomic number 9, atomic weight 18.998, symbol F. See Table 6.

fluorine poisoning
References in periodicals archive ?
Not to say light fluorocarbon is problematic--many professional anglers on the top bass circuits fish nothing else, but if you have casting difficulties with fluoro in heavier tests, a switch to quality mono will often solve them.
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This new production facility combines with the Yo-dogawa Plant in Japan (Settsu, Osaka Prefecture) and Daikin Fluoro Coatings (Shanghai) Co.
6-ounce reel with 150 yards of 15-pound braid and 3 1/2 feet of 30-pound fluoro and clamped on a 7-foot Fenwick HMG AV 10-20 rod--a bit heavy, but with water temps at 90, I wanted to keep fish fights short.
Silastic 100% fluoro liquid silicone rubber (F-LSR) is a fully fluorinated two-part injection moldable elastomer designed to meet increasingly stringent automotive engine temperature, fuel and oil resistance specifications, while improving environmental sustainability during manufacturing, according to the company.
The Fluoro polymer-booted insert holder bolts between standard ANSI pipe flanges.
075Mm X 12Mm X 12Mr Poly Tetra Fluoro Ethylene (Ptfe) Tape To Bp22898.
The present global amount of fluoro chemical products(including inorganic fluoro-products) is around 2,500,000 tons, which amounts to $21 billion in sales.
Fluoro is a big trend this season and one of the hardest to wear.
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