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Transformation behaviour of calcium phosphate 2. Effects of various phosphorylated amino acids

✍ Scribed by A.T.-C. Wong; J.T. Czernuszka

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
950 KB
Volume
103
Category
Article
ISSN
0927-7757

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✦ Synopsis

A constant composition study of the effect of phosphorylated amino acids on the precipitation of calcium phosphate has been made. It has been shown that enhancement or inhibition of precipitation rates and transformation rates from precursor phases can occur depending on the phospho-amino acid. Enhancement was facilitated by sterically accessible organic molecules and by phosphoryl groups of enhanced electronegativity. A modified Avrami-Johnson-Mehl model has been used to explain this behaviour. The complexation tendencies of the phospho-amino acids with calcium ions increase with a decrease in molecular mass and steric accessibility. Precipitation was found to have involved interfacecontrolled growth without any saturation of potential nucleation sites.

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