Results 301 to 310 of about 64,811 (353)
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Chemistry – A European Journal, 2016
AbstractCrystallization from amorphous phases is an emerging pathway for making advanced materials. Biology has made use of amorphous precursor phases for eons and used them to produce structures with remarkable properties. Herein, we show how the design of the amorphous phase greatly influences the nanocrystals formed therefrom.
Casper J. S. Ibsen +2 more
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AbstractCrystallization from amorphous phases is an emerging pathway for making advanced materials. Biology has made use of amorphous precursor phases for eons and used them to produce structures with remarkable properties. Herein, we show how the design of the amorphous phase greatly influences the nanocrystals formed therefrom.
Casper J. S. Ibsen +2 more
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Amorphous Calcium Phosphate Coatings
2022Amorphous calcium phosphate (ACP) is unique among calcium phosphates because it lacks the long-range, periodic atomic-scale order observed in crystalline calcium phosphates. In addition, ACP exhibits a high dissolution rate in vitro and in vivo. In this chapter, the fabrication processes of ACP coating films, based on wet and dry processes, are ...
Kyosuke Ueda, Takayuki Narushima
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Fluoride and Casein Phosphopeptide-Amorphous Calcium Phosphate
Journal of Dental Research, 2008Casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) slows the progression of caries and remineralizes enamel subsurface lesions. The aim of this study was to determine the ability of CPP-ACP to increase the incorporation of fluoride into plaque and to promote enamel remineralization in situ.
E C, Reynolds +6 more
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Amorphous calcium (ortho)phosphates
Acta Biomaterialia, 2010Amorphous calcium phosphates (ACPs) represent a unique class of biomedically relevant calcium orthophosphate salts, having variable chemical but essentially identical glass-like physical properties, in which there is neither translational nor orientational long-range ordering of the atomic positions.
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Characterization of calcium phosphate cements modified by addition of amorphous calcium phosphate
Acta Biomaterialia, 2010In this study the influence of amorphous calcium phosphate (ACP) on the setting of, and the formed apatite crystallite size in, a calcium phosphate cement (CPC) based on alpha-tricalcium phosphate (alpha-TCP) or tetracalcium phosphate (TTCP)/monocalcium phosphate monohydrate (MCPM) was investigated.
Natasja M F, Van den Vreken +4 more
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Hydrogen phosphates play a critical structural role in amorphous calcium phosphates
Chemical Communications, 2022Amorphous calcium phosphate (ACP) prepared by different dehydration methods have different speciation of phosphate ions.
Shu-Li Li +4 more
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Journal of Biomimetics, Biomaterials and Tissue Engineering, 2010
Amorphous calcium phosphates (ACPs) represent a unique class of biomedically relevant calcium orthophosphate salts, in which there are neither translational nor orientational long-range orders of the atomic positions. Nevertheless, the constancy in their chemical composition over a relatively wide range of preparation conditions suggests the presence ...
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Amorphous calcium phosphates (ACPs) represent a unique class of biomedically relevant calcium orthophosphate salts, in which there are neither translational nor orientational long-range orders of the atomic positions. Nevertheless, the constancy in their chemical composition over a relatively wide range of preparation conditions suggests the presence ...
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Pressure induced amorphization in calcium phosphates
Journal of Materials Science, 1999Polycrystalline 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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Nucleotide stabilization of amorphous calcium phosphate
Materials Research Bulletin, 1975Abstract Amorphous calcium phosphate granules, containing substantial amounts of magnesium and adenosine triphosphate (ATP) have been found in the hepatopancreas of the blue crab. These stable amorphous deposits are similar in local atomic order to synthetic amorphous calcium phosphate (ACP), which, in contrast, converts to hydroxyapatite in an ...
N.C. Blumenthal, F. Betts, A.S. Posner
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Thermochemical studies on amorphous calcium phosphate
Calcified Tissue Research, 1970Previous studies have indicated that synthetically-precipitated amorphous calcium phosphate, even though not a periodically regular structure, possesses a chemically definable local unit of structure. The present paper is a report of thermochemical studies performed to more clearly define this local chemical unit. Upon ignition in the absence of water,
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