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Hydroxyapatite (IMA name: hydroxylapatite [5]) (Hap, HAp, or HA) is a naturally occurring mineral form of calcium apatite with the formula Ca 5 (PO 4) 3 (OH), often written Ca 10 (PO 4) 6 (OH) 2 to denote that the crystal unit cell comprises two entities. [6] It is the hydroxyl endmember of the complex apatite group.
As such, soil type plays a role, because it will affect the water content of the environment. For example, some soils, like clay soils, retain water better than others, like sandy or silty soils. Further, acidic soils are better able to dissolve the inorganic matrix of hydroxyapatite than basic soils, thus accelerating the disintegration of ...
Amorphous calcium phosphate in combination with casein phosphopeptide has been used as a dental treatment to treat incipient dental decay. ACP sees its main use as an occluding agent, which aids in reducing sensitivity. Studies have shown that it does form a remineralized phase of hydroxyapatite consistent with the natural enamel.
The addition of fluoride to the water does not alter the taste or smell of the drinking water [citation needed] Fluoride therapy is often used to promote remineralization. This produces the stronger and more acid-resistant fluorapatite, rather than the natural hydroxyapatite. Both materials are made of calcium.
Fluorapatite (or fluoroapatite) is more resistant to acid attack than is hydroxyapatite; in the mid-20th century, it was discovered that communities whose water supply naturally contained fluorine had lower rates of dental caries. [14] Fluoridated water allows exchange in the teeth of fluoride ions for hydroxyl groups in apatite.
A naturally occurring mineral: Salt – sodium chloride or NaCl- has been used for millennia to preserve and flavor food. It comes from the ocean or landlocked salt deposits left by dead seas ...
Quicklime has a high affinity for water and is a more efficient desiccant than silica gel. The reaction of quicklime with water is associated with an increase in volume by a factor of at least 2.5. [10] Hydroxyapatite's free CaO content rises with increased calcination temperatures and longer times.
To avoid this, stir in either 1/8 teaspoon of salt or 1½ teaspoons of corn syrup before freezing, the American Egg Board recommends. The salt-mixed eggs can be used for savory dishes, and the ...