What's the difference between apatite and francolite?
Apatite
Definition:
(n.) Native phosphate of lime, occurring usually in six-sided prisms, color often pale green, transparent or translucent.
Example Sentences:
(1) Thirty-eight fluids were found to have crystals (monosodium urate (MSU) in 15, calcium pyrophosphate dihydrate (CPPD) in 5, CPPD plus apatite-like crystals in 9, apatite-like clumps alone in 8 and lipid liquid in 1).
(2) Collagen and apatite have been extracted from full bone using well known methods.
(3) These results show that Mg-containing apatites dissolve to a greater extent than Mg-free apatites with the subsequent reprecipitation of Mg-poor apatites.
(4) Both in the HA and the dental mineral systems, the results are consistent with the precipitation of another carbonate-containing apatitic phase during equilibration.
(5) Pure monoclinic or triclinic calcium pyrophosphate dihydrate (CPPD) crystals, apatite crystals or mixtures of these crystals were injected into the synovial-like space created by the rat air pouch to compare the acute inflammation induced by these crystals.
(6) The findings in X-ray analysis had the best correlation with chemical analysis, which was applied mainly to the detection of apatite.
(7) Three presented atypically with calcific periarthritis (due to apatite) in the absence of osteopenia; two had classical presentation with osteopenic fracture; and one was the asymptomatic father of one of the patients with calcific periarthritis.
(8) The radiographic feature is characteristic, and the examination of the material removed from synovial sheath or from calcific deposits allows apatite crystals to be identified.
(9) The findings evidence changed ratio and concentrations of chemical elements and complexes (apatite phases) in the mineral component structure.
(10) The results of the present constant composition (CC) studies show that defect apatites may be formed under conditions of sustained supersaturation with a non-stoichiometric coefficient dependent on the pH of the growth medium.
(11) On histologic examination, the one and two-day-old infarcts exhibited subendocardially located central zones and surrounding peripheral zones, both of which showed distinctive histopathological and histochemical features, including the selective occurrence in the peripheral zones of calcified muscle cells with ultrastructurally demonstrable apatite-like crystals in mitochondria.
(12) The surface is stabilized, i.e., leaching is retarded, by the rapid Ca,P-accumulation within the silica structure before apatite crystals are observed on the surface.
(13) On the other hand, synchrotron X-ray diffraction data clearly indicate that apatite lattice parameters do not change as the crystals get larger.
(14) The present study was undertaken to determine the adsorption isotherms of Mg ions onto synthetic apatites and biominerals in tooth and bone tissues in the presence of other ions of natural occurrence.
(15) The loss of the organic phosphate groups significantly increased the operational lag time, but did not abolish nucleation of apatite crystals by the bone collagen fibrils essentially devoid of Ser(P) and Thr(P).
(16) Synthetic hydroxyapatite has long been used in chromatography because of the bonding capacity apatite surface has for certain proteins and polynucleotides.
(17) A large number of trace elements has been found in calcium stones (whewellite, weddellite, and apatite) and in struvite.
(18) The heats of adsorption of small molecules on bone and apatite surfaces show that these materials have polarizing surfaces which form strong bonds with polar and polarizable molecules.
(19) Fe-containing fluoridated apatites were less well crystallized than Fe-free fluoridated apatites.
(20) The results of kinetic studies are presented for two forms of soluble 3':5'-AMP-dependent protein kinase, obtained by DEAE-cellulose and hydroxyl apatite chromography.
Francolite
Definition:
(n.) A variety of apatite from Wheal Franco in Devonshire.
Example Sentences:
(1) X-ray diffraction patterns show that the mature denticles of three extant chiton species are composed of the mineral lepidocrocite and an apatite mineral, probably francolite, in addition to magnetite.
(2) The " mineral" composition of teeth from the Joggins microsaur Hylerpeton dawsoni is crystallochemically identical with francolite, a carbonate fluorapatite.
(3) X-ray diffraction showed that these bodies consisted of carbonate apatite from the group Francolite-Dahllite.