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首页> 外文期刊>Crystal growth & design >Hydroxyapatite Crystal Formation in the Presence of Polysaccharide
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Hydroxyapatite Crystal Formation in the Presence of Polysaccharide

机译：多糖存在下羟基磷灰石晶体的形成

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摘要

Natural polysaccharides play an important role in the formation of nanohydroxyapatite (nHA) crystals in biological systems. In this study, we synthesized nHA crystals in the presence of four polysaccharides, i.e., pectin, carrageenan, chitosan, and amylose, referred as PeHA, CaHA, CsHA, and AMHA, respectively. X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, scanning electron microscope, and thermogravimetric analysis were used to investigate the formation of nHA crystals. The shape of prepared nHA crystals is needle/rod-like in all cases, whereas the size increases in the order of PeHA, CaHA, CsHA, and AmHA. The presence of polysaccharides induces the heterogeneous nucleation of nHA and further modulates the crystal growth. Our data suggest that the interaction intensity between nHA and polysaccharides is in the decreasing order of PeHA, CaHA, CsHA, and AmHA, resulting in the smallest nHA crystals; with pectin. It is also demonstrated that a high polysaccharide concentration and short reaction time are adverse to nHA crystal's, especially for the polysaccharides with carboxyl groups. This study can provide insight into the effects of polysaccharides with different chemical functional groups (COOH, -OSO3H, -NH2, -OH) on the formation of nHA crystals.
机译：天然多糖在生物系统中形成纳米羟基磷灰石（nHA）晶体中起重要作用。在这项研究中，我们在四种多糖（果胶，角叉菜胶，壳聚糖和直链淀粉）存在下合成了nHA晶体，分别称为PeHA，CaHA，CsHA和AMHA。 X射线衍射，傅立叶变换红外光谱，透射电子显微镜，扫描电子显微镜和热重分析被用于研究nHA晶体的形成。在所有情况下，制备的nHA晶体的形状均为针状/棒状，而尺寸则按PeHA，CaHA，CsHA和AmHA的顺序增加。多糖的存在诱导nHA的异质成核，并进一步调节晶体的生长。我们的数据表明，nHA和多糖之间的相互作用强度以PeHA，CaHA，CsHA和AmHA的降序排列，从而产生最小的nHA晶体。与果胶。还证明了高的多糖浓度和短的反应时间对nHA晶体不利，特别是对于具有羧基的多糖。这项研究可以深入了解具有不同化学官能团（COOH，-OSO3H，-NH2，-OH）的多糖对nHA晶体形成的影响。

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