calcium fluoride abstract

Efficacy of diode and CO2 lasers along with calcium and ...

Jun 19, 2019· To maintain this balance, an adequate amount of calcium, phosphate and fluoride ions must be present in the oral environment . Thus, several non-invasive methods have been suggested to provide these ions in the oral cavity [3, 4]. Calcium and phosphate ions form the main structural component of the enamel, i.e., hydroxyapatite .

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calcium fluoride abstract - tambinh.nl

Calcium Fluoride . Abstract: Preparation of the tundish coverture fluxes by the blast furnace slag can recycle utilization of solid wastes discharged from iron and steel industry. Calcium fluoride and magnesia can play an important role for the basic performance of tundish coverture fluxes.

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Ab initio calculations and reduced density gradient ...

Abstract. We studied microhydrated calcium fluoride, calcium carbonate and their ions at the MP2/6-311++G** level of theory due to the lack of basic thermodynamic information about solvation of these salts and of systematic analyses of hydrogen bonding in their solvated species. ... We studied microhydrated calcium fluoride, calcium carbonate ...

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Ion release from calcium and fluoride containing dental ...

At 24 hours the order of cumulative fluoride release was: 1>3>4>2=5 with 1 significantly higher (p < 0.05) than the rest. At 72 and 168 hours, the cumulative calcium release was: 1>4>3>2=5 with 1 significantly higher (p < 0.05) than the rest. Conclusions. MI Varnish containing CPP-ACP had the highest release of calcium and fluoride ions.

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Recycling of calcium fluoride sludge as additive in the ...

Recycling of calcium fluoride sludge as additive in the solidification of fly ash with cement or calcium hydroxide was studied. Fly ash solidified with calcium hydroxide and calcium fluoride sludge failed to achieve a target compressive strength of 200 kN/m2 over a reaction period of 10 d.

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Calcium Fluoride : Slip and Polygonization during Crystal ...

Sep 26, 1964· CALCIUM fluoride occurs in Nature as the crystal form known as fluorite. It can, however, be grown artificially as single crystals, and when …

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Calcium Fluoride Precipitation and Deposition From 12mmol ...

Calcium Fluoride Precipitation and Deposition From 12mmol/L Fluoride Solutions With Different Calcium Addition Rates ... Shozo Takagi, Laurence C. Chow, Stanislav A. Frukhtbeyn. Abstract . A model system was used to study the potential improved efficacy of fluoride (F) rinses with a built-in mechanism for continuous calcium (Ca) release. The ...

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Fluoride Adsorption by Calcium Carbonate, Activated ...

Jan 30, 2016· Adsorption of fluoride increased with increasing contact time and reached equilibrium at 100 min. Adsorption data were fitted with the Langmuir isotherms. The maximum fluoride adsorptions occurred as 12.5 mg/g, 1.2 mg/g, 10.99 mg/g for calcium carbonate, activated alumina and activated sugarcane ash, respectively.

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Calcium fluoride - Wikipedia

Calcium fluoride is the inorganic compound of the elements calcium and fluorine with the formula CaF 2. It is a white insoluble solid. It occurs as the mineral fluorite (also called fluorspar), which is often deeply coloured owing to impurities.

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Intrinsic Birefringence in Calcium Fluoride and Barium ...

Abstract . We have measured an intrinsic birefringence in calcium fluoride in the ultraviolet for wavelengths from 365 nm down to 156 nm, and compared these results with theory and calculations. The measured effect is largest for propagation in the [110] direction, increasing strongly (faster than 1/lambda^2) for shorter wavelengths, and is ...

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Ultra Pure Water

Abstract. Fluorides occur both naturally (e.g., rock weathering and volcanic emissions) as well as because of human activities (e.g., phosphate rock mining, steel industry, and drinking water fluoridation). In natural waters, the concentration of fluoride is low, ranging up to 5 parts per million (ppm).

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Carious lesion remineralizing potential of fluoride- and ...

abstract = "Background: The authors conducted a laboratory study to determine the carious lesion remineralization and fluoridation potential of fluoride (F)- and calcium-containing toothpastes.

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Effects of Casein Phosphopeptide Amorphous Calcium ...

Abstract. The effects of casein phosphopeptide amorphous calcium fluoride phosphate (CPP-ACFP) paste on the remineralization of white spot lesions, evaluated clinically (Nyvad Index) and by standard photography's. The aim of the study was analyses clinically, the effect of Tooth Mouse in orthodontic patients with active white scores. ...

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ChemInform Abstract: Calcium Fluoride: An Efficient and ...

A simple and effective synthesis of 3,4-dihydropyrimidinone derivatives from aldehydes, 1,3-dicarbonyl compounds, and urea/thiourea in ethanol by using calcium fluoride as catalyst has been described.

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Europium-doped, calcium-fluoride scintillator system for ...

Abstract. An in-line detector and electronic system for low-level tritium detection have been built and tested. Tritium betas are detected with a europium- doped calcium-fluoride CaF 2 (Eu) scintillatorphotomultiplier combination. An inexpensive, fully integrated circuit, amplifying pulse shape analyzer, was designed and built for detecting low ...

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OSA | Ytterbium calcium fluoride waveguide laser

Abstract. Calcium fluoride is a well-known material for optical components. It is also suited for doping with rare-earth ions, e.g., ytterbium ones. Yb:CaF 2 is an efficient gain medium for high-power and ultrashort-pulse bulk lasers around 1 μm. We report on the first Yb:CaF 2 planar waveguide laser.

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(PDF) CaF2 nanoparticles: Synthesis and characterization

PDF | The aim of the present study was to prepare nano-sized calcium fluoride (CaF 2). Calcium fluoride nanoparticles were synthesized by CaCl 2 .6H 2 O and ammonium fluoride. Nanoparticles were ...

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Ab initio calculations and reduced density gradient ...

We studied microhydrated calcium fluoride, calcium carbonate and their ions at the MP2/6-311++G** level of theory due to the lack of basic thermodynamic information about solvation of these salts and of systematic analyses of hydrogen bonding in their solvated …

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Basic study on Ultraprecision machining of Single-crystal ...

Basic study on Ultraprecision machining of Single-crystal Calcium Fluoride. ... open access. Abstract. Calcium fluoride (CaF2) has a wide range of change of refractive index and permeability of wavelength from vacuum ultraviolet range to infrared range so that it is utilized for lenses or prisms. ... (2012) 000â€"000 ...

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Calcium, phosphate, and fluoride deposition on enamel ...

Abstract. Concurrent calcium, phosphate and fluoride depositions, and the rate of hydrogen ion production, during formation on acid etched enamel surfaces were kinetically measured in a closed system. The deposition rate of calcium and phosphate from solution was dependent on the fluoride concentrations and pH.

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Fluoride Removal from Water by various techniques : Review

Fluoride Removal from Water by various techniques : Review . ... Abstract . This paper depicts the fluoride removal from drinking water can be accomplished by different methods, for example, coagulation-precipitation, membrane separation process, ion ... of calcium fluoride precipitates in combination with

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Efficacy of diode and CO2 lasers along with calcium and ...

To maintain this balance, an adequate amount of calcium, phosphate and fluoride ions must be present in the oral environment . Thus, several non-invasive methods have been suggested to provide these ions in the oral cavity [3, 4]. Calcium and phosphate ions form the main structural component of the enamel, i.e., hydroxyapatite .

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Fluoride: Uses, Side Effects, Interactions, Dosage, and ...

Learn more about Fluoride uses, effectiveness, possible side effects, interactions, dosage, user ratings and products that contain Fluoride ... View abstract. American Dental Association ...

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Calcium fluoride - Substance Information - ECHA

Substance Information. The properties of concern of substances have extensively been improved and extended. ... CAS (Chemical Abstract Service) registry number ... Calcium fluoride (CaF2) Other . IUPAC names . calcium difluoride . Registration dossier, Other .

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Dietary Calcium and Fluoride Interactions in Swine ...

Abstract. The effects of diets containing 0.5% calcium and 0.4% phosphorus or 1.2% calcium and 1.0% phosphorus and 0, 30, 150, or 450 ppm additional fluoride o We use cookies to enhance your experience on our website.

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Method for the Analysis of Total Fluoride in Fluoride ...

Sample Preparation. The method was evaluated by measurement of total fluoride in six types of commercially available fluoride-releasing dental varnishes that contained difluorosilane or sodium fluoride either alone or in combination with calcium phosphate salts.

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Fluorite | CaF2 - PubChem

Gas chromatography was used to measure the maternal and fetal plasma inorganic fluoride values at term in 91 women. They were assigned to one of four groups: group A were untreated controls; group B received a single daily dose of 1.5 mg of fluoride (as calcium fluoride) during the final trimester of pregnancy; group C was given a single dose of 1.5 mg of fluoride (as sodium fluoride) and ...

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OSA | Approximate Normal Emissivity Spectra in the ...

A single-beam ir spectroradiometric system has been used to measure the normal spectral emissivity of specimens of single-crystal and polycrystalline calcium fluoride in the ir at elevated temperatures. The wavelength range was 2–12 μ, and data were taken at sample temperatures of 500°C and 600°C. Room temperature data on the index of refraction of single-crystal calcium fluoride and its ...

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Ultra Pure Water

Abstract. Fluorides occur both naturally (e.g., rock weathering and volcanic emissions) as well as because of human activities (e.g., phosphate rock mining, steel industry, and drinking water fluoridation). ... The additives evaluated for calcium fluoride were also tested for calcium carbonate and calcium sulfate scale control.

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Calcium fluoride - Substance Information - ECHA

Substance identity Substance identity. The 'Substance identity' section is calculated from substance identification information from all ECHA databases. The substance identifiers displayed in the InfoCard are the best available substance name, EC number, CAS …

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