फ्लूरिन हिंदी उपयोग और उदाहरण

ख़जूर में फ्लूरिन भी पाया जाता है जिससे दांतों के क्षय होने की प्रकिया धीमी हो जाती है।

इसी प्रकार 9-फ्लूरिनोन को भी विभिन्न प्रयोगों में लिया जा सकता है।

चित्र जोड़ें 9-फ्लूरिनोन एक कार्बनिक यौगिक है।

"" ख़जूर में फ्लूरिन भी पाया जाता है जिससे दांतों के क्षय होने की प्रकिया धीमी हो जाती है।

फ्लूरिन इसके अंग्रेजी अर्थ का उदाहरण

In 1979 the publication of a patent filed by the pharmaceutical arm of Kyorin Seiyaku Kabushiki Kaisha disclosed the discovery of norfloxacin, and the demonstration that certain structural modifications including the attachment of a fluorine atom to the quinolone ring leads to dramatically enhanced antibacterial potency.

Geography of Surat Thani Province Trifluoroacetic acid (TFA) is an organofluorine compound with the chemical formula CF3CO2H.

It is a structural analogue of acetic acid with all three of the acetyl group's hydrogen atoms replaced by fluorine atoms and is a colorless liquid with a vinegar like odor.

TFA is a stronger acid than acetic acid, having an acid ionisation constant that is approximately 34,000 times higher, as the highly electronegative fluorine atoms and consequent electron-withdrawing nature of the trifluoromethyl group weakens the oxygen-hydrogen bond (allowing for greater acidity) and stabilises the anionic conjugate base.

Chemically, it is 2-deoxy-2-[18F]fluoro-D-glucose, a glucose analog, with the positron-emitting radionuclide fluorine-18 substituted for the normal hydroxyl group at the C-2 position in the glucose molecule.

Anhydrous fluoride salts, which are easier to handle than fluorine gas, can be produced in a cyclotron.

After [18F]FDG decays radioactively, however, its 2-fluorine is converted to 18O−, and after picking up a proton H+ from a [ion] in its aqueous environment, the molecule becomes glucose-6-phosphate labeled with harmless nonradioactive "heavy oxygen" in the hydroxyl at the C-2 position.

Although in theory all [18F]FDG is metabolized as above with a radioactivity elimination half-life of 110 minutes (the same as that of fluorine-18), clinical studies have shown that the radioactivity of [18F]FDG partitions into two major fractions.

Another fraction of [18F]FDG, representing about 20% of the total fluorine-18 activity of an injection, is eliminated renally by two hours after a dose of [18F]FDG, with a rapid half-life of about 16 minutes (this portion makes the renal-collecting system and bladder prominent in a normal PET scan).

This short biological half-life indicates that this 20% portion of the total fluorine-18 tracer activity is eliminated pharmacokinetically (through the renal system) much more quickly than the isotope itself can decay.

This reaction produces free excited fluorine radicals.

The atomic fluorine was provided by dissociation of SF6 gas using a DC electrical discharge.