Dietary Reference Intakes for Calcium, Phosphorus, Magnesium, Vitamin D, and Fluoride. National Academies Press. 17 October ...
For example, NaCl is sodium chloride, and CaF2 is calcium fluoride. Cations of transition metals able to take multiple charges ... For example, in uranium(VI) fluoride the oxidation number of uranium is 6. Another example is the iron oxides. FeO is iron(II) ... Example: sodium chloride, potassium oxide, or calcium carbonate. When the metal has more than one possible ionic charge or ...
It can be coprecipitated with lanthanide fluorides. Radium fluoride has the same crystal form as calcium fluoride (fluorite). ... Radium fluoride (RaF2) is a highly radioactive compound. ... prepared by the reaction of radium metal and hydrogen fluoride ...
Crystals of calcium sulfate or calcium fluoride are doped with dysprosium. When these crystals are exposed to radiation, the ... Dysprosium fluoride and dysprosium oxide are non-flammable. Dysprosium nitrate, Dy(NO3)3, is a strong oxidizing agent and ... Fibers of dysprosium oxide fluoride can be produced by heating an aqueous solution of DyBr3 and NaF to 450 °C at 450 bars for ... "Rare Earth Oxide Fluoride: Ceramic Nano-particles via a Hydrothermal Method". Pacific Northwest National Laboratory. Archived ...
... and fluoride ions. MI varnish releases the most amounts of calcium ions and fluoride. Enamel Pro varnish releases the most ... For fluoride varnish treatment, the benefit to cost ratio 1.8:1, whereas fluoride mouth rinsing is 0.9:1. With fluoride varnish ... While most fluoride varnishes contain 5% sodium fluoride at least one brand of fluoride varnish contains 1% difluorsilane in a ... NJ Cochrane; P Shen; Y Yuan; EC Reynolds (Mar 2014). "Ion release from calcium and fluoride containing dental varnishes". ...
Dietary Reference Intakes for Calcium, Phosphorus, Magnesium, Vitamin D, and Fluoride (1997); Dietary Reference Intakes for ... and Dietary Reference Intakes for Calcium and Vitamin D (2011). Mckiernan, F. E.; Wiley, C. (2008). "Vitamin D, Vitamin D, and ...
... for calcium, phosphorus, magnesium, vitamin D, and fluoride. Washington, D.C: National Academy Press. p. 250. doi:10.17226/5776 ... Osteomalacia reduces calcium absorption and increases calcium loss from bone, which increases the risk for bone fractures. ... One of the most important roles of vitamin D is to maintain skeletal calcium balance by promoting calcium absorption in the ... Osteoporosis can be a long-term effect of calcium and/or vitamin D insufficiency, the latter contributing by reducing calcium ...
Fluorspar, or calcium fluoride, was mined in Hardin County until the early 1990s. In recent years, average temperatures in the ...
... and then calcium fluoride (CaF2). Christie found 20.43% (NH4)+ and 78.87% (SiF6)2−. Bararite is named after Barari, a locality ... Silicon fluoride is formed. Ammonia also comes from burning coal. From there, ammonium fluorosilicate can form. A slight excess ...
Lower-grade magnesium fluoride is inferior to calcium fluoride in the infrared range.[citation needed] Magnesium fluoride is ... Magnesium fluoride is prepared from magnesium oxide with sources of hydrogen fluoride such as ammonium bifluoride: MgO + [NH4] ... synthetic magnesium fluoride is one of two materials (the other being lithium fluoride) that will transmit in the vacuum ... "Magnesium Fluoride Material Safety Data Sheet". Science Labs. May 21, 2013. Retrieved October 13, 2017. "Magnesium fluoride". ...
His thesis was titled Two-photon absorption spectroscopy of the trivalent cerium ion in calcium fluoride. After finishing his ... Gayen, Swapan Kumar (1984). Two-photon absorption spectroscopy of the trivalent cerium ion in calcium fluoride (PhD thesis). ...
Hessel found this to be true with lead sulfide crystals inside calcium fluoride crystals. Hessel also found Euler's formula ...
"The Production of Uranium metal by Reduction of its Fluoride with Calcium and Magnesium". Pakistan Steel Journal. Karachi, Sind ...
Fluorides are reduced with calcium, magnesium or barium: 2 AmF 3 + 3 Ba → 1150 − 1350 ∘ C 3 BaF 2 + 2 Am PuF 4 + 2 Ba → 1200 ∘ ... chloride or fluoride by reacting it with calcium in an inert atmosphere: ThO2 + 2 Ca → 2 CaO + Th Sometimes thorium is ... same as in calcium fluoride. Thorium reacting with oxygen exclusively forms the dioxide: Th + O 2 → 1000 ∘ C ThO 2 ⏞ Thorium ... Fluorides of actinides are usually used because they are insoluble in water and can be easily separated with redox reactions. ...
For instance, calcium fluoride, CaF2, crystallizes in a cubic motif called the fluorite structure. The same crystal structure ...
... this proceeds via conversion to scandium fluoride followed by a reduction with metallic calcium. This process is in some ways ...
Solutions of calcium hydroxide can also be used in this context yielding harmless calcium fluoride. (14) 5-Hydroxyhistamine ... Intramolecular delivery of fluoride is possible here and has been observed in some other cases of fluorination with SF4. SN1 ... Liquid hydrogen fluoride can be used as a solvent and catalyst with SF4 to selectively fluorinate alcohols. SF4's reactivity ... Intramolecular delivery of fluoride has been invoked to explain the formation of difluoromethyl cations. Attack of a molecule ...
Meanwhile, the minerals in saliva (calcium and phosphate) together with fluoride are repairing the enamel. Dental caries is a ... Fluoride treatments benefit the teeth by strengthening while sealants help chewing surfaces to not decay. Severe cases can lead ...
In the production of hydrogen fluoride, calcium fluoride is treated with sulfuric acid, precipitating calcium sulfate. In the ... Calcium sulfate (or calcium sulphate) is the inorganic compound with the formula CaSO4 and related hydrates. In the form of γ- ... So, to dissolve the maximum amount of calcium sulfate or calcium hydroxide in water, it is necessary to cool the solution down ... Another calcium compound, calcium hydroxide (Ca(OH)2, portlandite) also exhibits a retrograde solubility for the same ...
The mineral also has a dark black color, perhaps from free calcium (not bonded to fluoride). In 2012, a study reported ... Fluoride is not significant in seawater or brines, unlike the other halides, because the alkaline earth fluorides precipitate ... In space, fluorine commonly combines with hydrogen to form hydrogen fluoride. (This compound has been suggested as a tracer to ... Several other minerals, such as the gemstone topaz, contain fluoride. ...
The exact range is classified, but they said it fired "miles not yards". Uranium-doped calcium fluoride was the second type of ...
Some of his claims on fluoride and calcium have been challenged by the Australian Medical Association. Evans has written the ... His claims that the "calcium from dairy can remove the calcium from your bones" and that "most doctors do not know about this" ... Paleo Pete' Evans tells osteoporosis sufferer to ditch dairy because it 'removes calcium' from bones". News.com.au. 29 August ...
... hydrated sodium calcium uranyl sulfate carbonate fluoride. Schröckingerite crystallizes in the orthorhombic system, occurring ...
Other low shear strength materials: fluorides of calcium, lithium, barium, and rare earths; sulfides of bismuth and cadmium; ...
Before their availability, calcium fluoride in the form of fluorite crystals were used as material for these lenses; however ... A good high-refraction replacement for calcium fluoride as a lens material can be a fluorophosphate glass. Here, a proportion ... the low refraction index of calcium fluoride required high curvatures of the lenses, therefore increasing spherical aberration ... of fluorides is stabilized with a metaphosphate, with addition of titanium dioxide. Several of the mentioned high-performance ...
The element has been isolated through the reduction of its anhydrous chloride or fluoride with metallic calcium. Its estimated ... Holmium(III) fluoride is a yellowish powder that can be produced by reacting holmium(III) oxide and ammonium fluoride, then ... Holmium(III) chloride can be prepared in a similar way, with ammonium chloride instead of ammonium fluoride. It has the YCl3 ... Holmium-doped yttrium iron garnet (YIG) and yttrium lithium fluoride have applications in solid-state lasers, and Ho-YIG has ...
The acid can be prepared by mixing quartz powder (silicon dioxide), calcium fluoride, and concentrated sulfuric acid; the acid ... Available from art supply stores, it consists of fluoride compounds, such as hydrogen fluoride and sodium fluoride. As the ...
This is treated with 93% sulfuric acid to produce calcium sulfate, hydrogen fluoride (HF) and phosphoric acid. The HF is ... calcium sulfate}} \atop {\text{dihydrate}}}{{\ce {5 CaSO4*2H2O}}}}+{\ce {HF + 3 H3PO4}}} Ammonium sulfate, an important ... 2 H 2 O calcium sulfate dihydrate + HF + 3 H 3 PO 4 {\displaystyle {\underset {\text{fluorapatite}}{{\ce {Ca5(PO4)3F}}}}+{\ce { ...
Calcium triggers the secretion of histamine from mast cells after previous exposure to sodium fluoride. The secretory process ... can be divided into a fluoride-activation step and a calcium-induced secretory step. It was observed that the fluoride- ... It was also confirmed that the second, but not the first, step in sodium fluoride-induced histamine secretion is inhibited by ... Alm PE (April 1983). "Sodium fluoride evoked histamine release from mast cells. A study of cyclic AMP levels and effects of ...
Instead calcium fluoride, fused silica, and magnesium fluoride are used as they are transparent to shorter wavelengths. An ...
Dietary Reference Intakes for Calcium, Phosphorus, Magnesium, Vitamin D, and Fluoride. Washington, DC: National Academy Press. ... "Magnesium", pp.190-249 in "Dietary Reference Intakes for Calcium, Phosphorus, Magnesium, Vitamin D, and Fluoride". National ... Mg2+ ions close certain types of calcium channels, which conduct positively charged calcium ions into neurons. With an excess ... Biology and pharmacology of chemical elements Calcium in biology - Use of calcium by organisms Iodine in biology - Use of ...