Formation of composites by calcium phosphates with chondroitin sulfate and gelatin obtained at excess content of calcium ion in solution is studied by the methods of X-ray phase analysis, IR spectroscopy and electron microscopy. Inclusion to the crystals of hydroxyapatite as the main phase and the absence of chemical interaction of biopolymers with calcium phosphate is proved and some features of the effect of reagents addition order to the studied system calcium-ammonium hydrogen phosphate-organic component are elucidated.
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Ponomareva et al. (2009) studied this question.
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