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Hydroxyapatite crystal deposition disease (HADD) is a disease of uncertain etiology characterized by periarticular and intra-articular deposition of hydroxyapatite (HA) crystals. The shoulder is the most frequently involved site with classic calcific tendinitis presentation.
CANINE CALCIUM PHOSPHATE UROLITHS The most common forms of calcium phosphate observed in canine uroliths are hydroxyapatite and carbonate-apatite. The name carbonate-apatite is derived from the fact that carbonate ion may displace phosphate ion in some uroliths. Less common forms of calcium phosphate include calcium
Apatite is a group of phosphate minerals with high concentrations of OH −, F −, Cl − or ions, respectively, in the crystal. Apatite is characteristic of biological systems. It is one of a few minerals produced and used by biological micro-environmental systems. It hardness defines 5 on the Mohs scale.
Nano medical hydroxyapatite (
Hydroxyapatite (HAp) is a calcium phosphate similar to the human hard tissues in morphology and composition 1.Particularly, it has a hexagonal structure 2, 3 and a stoichiometric Ca/P ratio of 1.67, which is identical to bone apatite 2, 4, 5.. An important characteristic of hydroxyapatite is its stability when compared to other calcium phosphates.
Fluorapatite, often with the alternate spelling of fluoroapatite, is a phosphate mineral with the formula Ca 5 (PO 4) 3 F (calcium fluorophosphate). Fluorapatite is a hard crystalline solid. Although samples can have various color (green, brown, blue, yellow, violet, or colorless), the pure mineral is colorless as expected for a material lacking transition metals.
Nov 18, 2018· Apatite is a phosphate mineral that happens to be the main source of phosphorous to plants. It consists of three types depending on the predominant ion (OH -, F -, or Cl - ) present in the crystal lattice called Hydroxylapatite Fluorapatite and Chlorapatite.
Apatite definition, a common mineral, calcium fluorophosphate, Ca5FP3O12, occurring in individual crystals and in masses and varying in color, formerly used in the manufacture of phosphate …
Made from a common group of minerals containing a calcium phosphate base, Apatite reminds us that truly knowing oneself is the key to opening up the doors of the universe, a place where anything is possible. Speaking of possibilities…Here's the game changer in harnessing the full potential of Apatite.
So, majority apatite content or struvite presence in a stone correlated with a positive stone culture result, but note that 27% of struvite patients and 35% of apatite stone patients showed no culturable organism in their stones, so stone composition alone was not a perfect indicator of culturable organisms in the stones of PCNL patients.
Calcium phosphate kidney stones include apatite (carbapatite or hydroxyapatite), brushite and octacalcium phosphate with the occurrence rate of apatite, 4-10%; brushite, 2-6%; and rarely octacalcium phosphate . A recent study has reported that the occurrence of calcium phosphate containing stones is increasing over time .
Apatite is the most common phosphate mineral, and is the main source of the phosphorus required by plants. The bones and teeth of most animals, including humans, are composed of calcium phosphate, which is the same material as Apatite. (These biological Apatites are almost exclusively the Hydroxylapatite type.)
Berkeley Advanced Biomaterials (BAB) specializes in developing and manufacturing hydroxyapatite (HAP), tricalcium phosphate (TCP), and other calcium-based products.
Jun 12, 2018· Apatite Properties. Apatite is a calcium phosphate and quite a rare tourmaline variety. It comes in many colors and forms, and it's often confused with many other minerals, such as Aquamarine and Fluorite. It can be opaque, translucent, or transparent.
Apatite is the principal primary mineral, but a number of others are common in deposits formed during weathering of phosphate *In the trade the phosphate content of phosphate rock and fertilizer is commonly re ported as Ca3(PO4 >2, known as bone phosphate of lime (B.P.L.). To convert PjOs to
Calcium phosphate kidney stones are less common than those formed with calcium oxalate. ... The most important calcium and PO4 3-involved renal stones are carbonate apatite, hydroxyapatite, and brushite. The struvite calculi are formed of magnesium, ammonium and phosphate. The basic cause is the supersaturation of calcium compounds in the urine.
Phosphate was also formerly mined in Lincoln County, Wyoming. Geology. Although some igneous rocks have economic grades of phosphate, no igneous phosphate rock is mined in the US. Small amounts of phosphate were mined from igneous apatite …
And unlike their more unitary counterpart, calcium phosphate stones can be one of two different kinds – brushhite or hydroxyapatite, and to this time no one knows why. Note that 'carbonate apatite is often used interchangeably with hydroxyapatite. You might think this kind of technical detail too precious for serious attention, but it is not.
The Scientific World Journal is a peer-reviewed, Open Access journal that publishes original research, reviews, and clinical studies covering a wide range of subjects in science, technology, and medicine. The journal is divided into 81 subject areas.
Apatite (Ca 10 (PO 4) 6 (OH,F,Cl) 2) is the most common mineral for phosphates production, particularly for fertilizers and phosphoric acid.Apatite can be igneous or sedimentary. Almost all apatite ores contain rare earth elements, but igneous apatite has a higher concentration than sedimentary apatite.
Phosphate ore (apatite) is converted into fertilizer with sulfuric acid and phosphogypsum is a by-product of this process. Approximately 5 tons per ton of P 2 O 5 is produced. Rock phosphate is a naturally occurring source for P 2 O 5. Production of rock phosphate in India is shown in Fig. 14.3.
Apatite is a family of minerals centered around fluorapatite, or calcium phosphate with a bit of fluorine, with the formula Ca 5 (PO 4) 3 F. Other members of the apatite group have chlorine or hydroxyl that take the place of the fluorine; silicon, arsenic or vanadium replace the phosphorus (and carbonate replace the phosphate group); and strontium, lead, and other elements substitute for the ...
Hydroxyapatite has minimal resorbability and acts as a scaffold for bone ingrowth by providing a fixed structure for calcification to occur. 20,21 When used as a combination of hydroxyapatite and beta-tricalcium phosphate, it has the ability to dissolve, break down, and allow new bone formation and remodeling required to attain optimal ...
THE GEOCHEMISTRY OF URANIUM IN APATITE AND PHOSPHORITE By Z. S. ALTSCHULEK, K. S. CLAKKE, JR., and E. J. YOUNG ABSTRACT Apatite contains only traces of uranium, yet as apatite is a minor constituent in most rocks and the major constituent of a few very large deposits, it accounts, paradoxically, for both
A Phosphate is a chemical derivative of phosphoric acid.The phosphate ion (PO 4) 3− is an inorganic chemical, the conjugate base that can form many different salts.In organic chemistry, a phosphate, or organophosphate, is an ester of phosphoric acid. Of the various phosphoric acids and phosphates, organic phosphates are important in biochemistry and biogeochemistry (and, consequently, in ...
Hydroxyapatite | Ca5HO13P3 | CID 14781 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities ...
As nouns the difference between phosphate and apatite is that phosphate is (chemistry) any salt or ester of phosphoric acid while apatite is (mineral) a calcium fluoride phosphate of variable composition, sometimes used in the manufacture of fertilizer. As a verb phosphate is to treat or coat with a …
Phosphate rock solubility tests Apatite solubility. The three solutions commonly used to measure the solubility (reactivity) of direct application phosphate rock (DAPR) are neutral ammonium citrate (NAC), 2-percent citric acid (CA), and 2-percent formic acid (FA). The methods used to measure the solubility of PR rock stem from procedures used ...
Sep 16, 2004· Hydroxyapatite (HA) is prepared by precipitation and subsequent sintering at temperatures above 1000°C (Ca‐to‐P ratio is 1.67). Beta‐tricalcium phosphate (β‐TCP), which possesses stoichiometry similar to amorphous biologic precursors to bone mineral, displays a Ca‐to‐P molar ratio of 1.5. 1-3
lazur-apatite : variété bleu-ciel d'apatite décrite par le minéralogiste finnois Nordenskiöld en 1857 sur des échantillons de Bucharia (Turkestan oriental ou chinois (actuel Xinjiang)) . moroxite : variété bleu-vert d'apatite décrite par le minéralogiste norvégien Abildgaard en 1798 à Arendal, Norvège .
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