Results 241 to 250 of about 1,188,684 (285)

Stabilization of amorphous calcium phosphate by Mg and ATP

Calcified Tissue Research, 1977
A synergistic effect has been demonstrated when magnesium and adenosine triphosphate (ATP) are used together in solution to delay the conversion of a slurry of amorphous calcium phosphate (ACP) to crystalline hydroxyapatite (HA). Conversion is delayed in some instances more than 10 times as long as with either ATP or Mg alone.
N C, Blumenthal, F, Betts, A S, Posner
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Thermochemical studies on amorphous calcium phosphate

Calcified Tissue Research, 1970
Previous 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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Fluoride and Casein Phosphopeptide-Amorphous Calcium Phosphate

Journal of Dental Research, 2008
Casein 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. Randomized, double-blind, cross-over studies involved
E C, Reynolds, F, Cai, N J, Cochrane, P, Shen, G D, Walker, M V, Morgan, C, Reynolds   +6 more
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Amorphous Calcium Phosphate: The Contention of Bone

Journal of Dental Research, 1997
whenheservedasa radar officer in the USArmyAir Corps in the Pacific,earningthreebronzebattle stars. In 1954, hereceivedhis PhDand went to the American Dental Association ResearchDivision at the National BureauofStandards in Washington,DC, for post-doctoral training.
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Amorphous Calcium Phosphate

2001
ACP is a unique calcium phosphate in that it lacks long-range crystalline order. Yet the constancy in the composition of ACP over a wide range of solution conditions suggests a well-defined local structural unit. Although this order within disorder is the most distinguishing feature of ACP, the solution instability of ACP and its ready transformation ...
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The Transformation of Amorphous Calcium Phosphate into Crystalline Hydroxyapatite

1976
Under conditions at which amorphous calcium phosphate (ACP)is the initial precipitate, the amorphous particles are intimately associated with the nucleation of the secondary, crystalline phase. The mechanism of conversion of ACP to a suitable template for secondary nucleation is very complex, involving both external, solution mediated processes, and ...
Brečević, Ljerka, Furedi-Milhofer, Helga   +1 more
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Synthesis of Amorphous Calcium Phosphate: A Review

Key Engineering Materials, 2020
The aim of this study is to summarize various synthesis routes of amorphous calcium phosphate (ACP), focusing on properties, especially Ca/P molar ratio and specific surface area (SSA) of obtained ACP. The effects of synthesis conditions on properties of final products are analysed and discussed.
Marika Mosina, Janis Locs
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The Reaction of Monofluorophosphate with Amorphous and Apatitic Calcium Phosphates

Caries Research, 2009
The interaction between solutions of commercial monofluorophosphate (FPO₃2––) and amorphous and apatitic calcium phosphates was investigated at pH’s 4, 5, and 7. The affinity between FPO₃2–– and apatite is minimal at pH 7 but materially increases with decreasing pH. Coupled with this greater uptake, however,
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Synthesis and Dehydration of Amorphous Calcium Phosphate

Inorganic Materials, 2001
Amorphous calcium polyphosphate was prepared by exchange reaction, and the variation in its molecular composition during dehydration was examined. During heating, the material is first hydrolyzed by its own hydration water to form calcium mono- and diphosphates, which again transform into calcium polyphosphate at higher temperatures.
V. A. Sinyaev, E. S. Shustikova, L. V. Levchenko, A. A. Sedunov   +3 more
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Nucleotide stabilization of amorphous calcium phosphate

Materials Research Bulletin, 1975
Abstract 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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