Abstract

The thermodynamic and experimental modeling of calcium carbonate crystallization in a model solution of human bile is performed. CaCO₃ samples are synthesized in the presence of additives with variable additive concentrations. The phase and group-structure composition of the synthesized samples is determined by X-ray powder diffraction (XRD), Fourier-transform IR spectroscopy, and optical microscopy. Amorphous calcium carbonate and calcite are found to be primarily formed in the human bile model solution in the presence of glycine, glutamic acid, and albumen separately. When twenty amino acids and albumen are present in the highest concentrations permissible in the human body, vaterite is formed as the major phase. Distinctions in phase and group-structure compositions of samples are shown to occur depending on synthetic parameters. An effect is suggested to be caused by the compositions and concentrations of the additives used on the formation of a certain calcium carbonate polymorph.

中文翻译：

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胆汁，蛋白和氨基酸存在下碳酸钙的合成

摘要

在人胆汁的模型溶液中进行碳酸钙结晶的热力学和实验模型。碳酸钙₃在具有可变添加剂浓度的添加剂存在下合成样品。合成样品的相和基团结构组成通过X射线粉末衍射（XRD），傅立叶变换红外光谱和光学显微镜确定。发现无定形碳酸钙和方解石主要在人胆汁模型溶液中分别存在甘氨酸，谷氨酸和白蛋白的情况下形成。当二十种氨基酸和白蛋白以人体允许的最高浓度存在时，球v石便成为主要相。样品的相和组结构组成的区别显示出取决于合成参数。