fluorapatite वाक्य
उदाहरण वाक्य
मोबाइल
- The presence of fluorapatite helps prevent tooth decay or dental caries.
- Fluorapatite as a mineral is the most common phosphate mineral.
- In fluorapatite, fluoride takes the place of a hydroxide.
- Fluorapatite can be synthesized in a three step process.
- Fluorapatite is found in the teeth of sharks and other fishes in varying concentrations.
- Fluorapatite crystallizes in a hexagonal crystal system.
- This produces the stronger and more acid-resistant fluorapatite, rather than the natural hydroxyapatite.
- Three minerals exist that are industrially relevant sources of fluorine : fluorite, fluorapatite, and cryolite.
- Fluoride reduces the decay of tooth enamel by the formation of fluorapatite and its incorporation into the dental enamel.
- In the guano deposit it occurs with carbonate-fluorapatite, calcite, dolomite, quartz and clay minerals.
- It occurs associated with turquoise, chalcosiderite, cyrilovite, torbernite, libethenite, sampleite, saleeite and fluorapatite.
- Fluorapatite resists attacks by acids better than apatite itself, so the tooth enamel resists decay better than enamel containing no fluoride.
- During digestion of apatite with sulfuric acid to make phosphoric acid, hydrogen fluoride is produced as a byproduct from any fluorapatite content.
- The presence of fluoride in saliva speeds up crystal precipitation forming a fluorapatite-like coating which will be more resistant to caries.
- It is found in association with fluorapatite, wavellite, phosphosiderite, strengite, aldermanite, cacoxenite, variscite, turquoise, fluorite and quartz.
- Initially, researchers hypothesized that fluoride helped by converting tooth enamel from the more acid-soluble mineral hydroxyapatite to the less acid-soluble mineral fluorapatite.
- Fluorapatite as a naturally occurring impurity in apatite generates hydrogen fluoride as a byproduct during the production of phosphoric acid, as apatite is digested by sulfuric acid.
- Fluorapatite ( Ca 5 ( PO 4 ) 3 F ) is mined along with other apatites for its phosphate content and is used mostly for production of fertilizers.
- The mineral was named apatite by the German geologist Abraham Gottlob Werner in 1786, although the specific mineral he had described was reclassified as fluorapatite in 1860 by the German mineralogist Karl Friedrich August Rammelsberg.
- The " biomimetic hydroxylapatite " is intended to protect the teeth by creating a new layer of synthetic enamel around the tooth instead of hardening the existing layer with fluoride that chemically changes it into fluorapatite.
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