合浦珠母贝贝壳珍珠层EDTA可溶性基质蛋白对无定形碳酸钙稳定性的影响

The effect of nacreous EDTA soluble matrix protein of Pinctada fucata on the stabilization of amorphous calcium carbonate

通过红外光谱、扫描电镜、能谱等方法探讨了合浦珠母贝贝壳珍珠层EDTA可溶性基质蛋白(ESM)对无定形碳酸钙(ACC)晶型转化的影响。试验结果显示,合浦珠母贝贝壳珍珠层ESM在镁离子存在的条件下能够显著抑制ACC的转化,并减少最终诱导形成的方解石中的镁离子含量。同时,珍珠层ESM具有调节方解石晶体晶貌的作用。

We investigated the effects of EDTA soluble matrix proteins（ESM） from nacreous layer of the shell of Pinctada fucata on the transformation of ACC using a variety of testing methods like FTIR, SEM and EDS. We found that nacreous ESM could inhibit ACC transformation in the presence of magnesium and reduce the content of magnesium in the formed calcite. Moreover, the morphology of the calcite was controlled by nacreous ESM during ACC transformation.