Results 251 to 260 of about 1,188,684 (285)

Amorphous calcium silicate as a chemisorbent for phosphate

Current Applied Physics, 2004
Abstract Amorphous calcium silicate (ACS), a novel silicate material developed as filler for use in paper manufacture, has shown an affinity for the chemisorption of orthophosphate from an aqueous solution obeying a Freundlich isotherm. Removal efficiencies of up to 100% were achieved at environmental- and waste-scale concentrations of phosphate of ...
D.C. Southam, T.W. Lewis, A.J. McFarlane, J.H. Johnston   +3 more
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Pressure induced amorphization in calcium phosphates

Journal of Materials Science, 1999
Polycrystalline hydroxylapatite (HA), hydrated tricalcium phosphate (HTCP), α tricalcium phosphate (α TCP), dicalcium phosphate dihydrate (DCPD) and dicalcium phosphate anhydrous (DCPA) were subjected to various pressures upto 10 GPa and the retrieved materials were examined by XRD and FTIR. These compounds showed amorphization at pressures upto 10 GPa,
S. N. Vaidya, V. Sugandhi
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State of water in amorphous calcium and calcium-magnesium phosphates

Russian Journal of General Chemistry, 2008
Fourier-transform infrared spectra of three samples of deposited amorphous phosphates, calcium monodiphosphate (orthopyrophosphate) with a molar ratio 2P/(2P + 1P) of ∼0.3, calcium magnesium monophosphate with an atomic ratio Mg/(Mg + Ca) of ∼0.3, and calcium-magnesium monodiphosphate with a molar ratio 2P/(2P + 1P) of ∼0.1 and atomic ratio Mg/(Mg + Ca)
V. A. Sinyaev, R. Z. Le Geros, L. V. Levchenko, E. S. Shustikova, R. A. Karzhaubaeva   +4 more
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Amorphous calcium phosphate (ACP) in tissue repair process

Microscopy Research and Technique, 2018
AbstractSynthetic biomaterials submitted to new structural technologies have become ideal for the recovery of traumatized bone tissues and some bone substitutes such as bioactive glass, β‐Tricalcium phosphate (β‐TCP) and amorphous calcium phosphate (ACP) are being used in areas of tissue defects.
Sergio Allegrini, Antonio Carlos da Silva, Maristela Tsujita, Marcos Barbosa Salles, Sergio Alexandre Gehrke, Francisco José Correa Braga   +5 more
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Amorphous calcium phosphate in casein micelles of bovine milk

Calcified Tissue International, 1983
The calcium phosphate remaining after hydrazine deproteination of casein micelles isolated from bulk skim milk exhibits under the electron microscope a very fine and uniform granularity being formed by small subunits with a true diameter of approximately 2.5 nm.
T C, McGann, R D, Kearney, W, Buchheim, A S, Posner, F, Betts, N C, Blumenthal   +5 more
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Comparative chemistry of amorphous and apatitic calcium phosphate preparations

Calcified Tissue Research, 1972
Unwashed samples of amorphous calcium phosphate (ACP) contain an irreplaceable labile fraction, rich in acid phosphate and low in Ca/P ratio, which is irreversibly lost during the washing process. Native ACP precipitated in the pH range 6.6–10.6 varied in Ca/P molar ratio from 1.18 to 1.50 and in HPO 4 2−
J D, Termine, E D, Eanes
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Amorphous Calcium Phosphates and Their Nanocomposites

The primary goal of the Thesis was to develop a wet chemical synthesis route for the synthesis of SOM-containing ACP and analyse the impact of SOM on ACP’s physiochemical properties (particle size, morphology, true density, specific surface area, and transformation kinetics) and cytocompatibility.
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Amorphous calcium phosphates for tooth mineralization.

Compendium of continuing education in dentistry (Jamesburg, N.J. : 1995), 2005
The destruction of tooth structure through caries and erosive processes is due to two types of acidic challenges that affect the tooth in different ways. Acidic attack by cariogenic bacteria initially produces subsurface lesions that weaken the enamel and, if left unchecked, can progress through the enamel and dentin and eventually into the pulpal ...
Ming S, Tung, Frederick C, Eichmiller
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Dental applications of amorphous calcium phosphates.

The Journal of clinical dentistry, 2000
Certain commercial materials and equipment are identified in this paper to specify the experimental procedure. In no instance does such identification imply recognition or endorsement by the National Institute of Standards and Technology or the ADA Health Foundation, or that the material or equipment identified is necessarily the best available for the
M S, Tung, F C, Eichmiller
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Calcium metal to synthesize amorphous or cryptocrystalline calcium phosphates

Materials Science and Engineering: C, 2012
Abstract Metallic calcium was never used before as the calcium source in synthesizing bioceramics. Amorphous calcium phosphate (ACP) powders were synthesized at room temperature, in synthetic mineralization solutions which contained Na+, K+, Mg2 +, Cl−, HCO3− and HPO42 − ions at concentrations similar to those found in human blood plasma, by using ...
openaire   +1 more source