Biological evaluation of the modified nano-amorphous phosphate calcium doped with citrate/poly-amino acid composite as a potential candidate for bone repair and reconstruction.

5A , it was not hard to see that the cell proliferation rate of appropriate concentration of the leach liquor showed an increasing trend with the extension of culture time.

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The pH values of PAA and the composite degradation solution showed a trend of decreasing firstly and then increasing (Fig. 3B ).

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