The limits of solid solutions and thermal deformations in the L-alanine–L-serine (L-ala–L-ser) amino acid system have been determined. Thirteen amino acid mixtures with various proportions of the components L-ser/L-ala were studied using powder X-ray diffraction techniques. It was found that the regions of solid solutions in the system are rather limited and cover less than 10 mol. % from each component side. The thermal behavior of the components L-ser and L-ala and the composition L-ser/L-ala = 90/10 were studied by temperature-resolved powder X-ray diffraction. The heating of L-ser and L-ala only causes thermal deformations, while two-phase mixtures with the 90/10 L-ser/L-ala ratio form solid solutions at elevated temperatures. Additionally, the parameters of the thermal deformation tensor for L-ser and L-ala were calculated, and the figures of their thermal expansion coefficients were plotted and analyzed. The study conducted is of high applicability, since amino acids are active components of various biological, geological, and technological processes, including those at elevated temperatures, and have numerous applications in life-science industries.

中文翻译：

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L-丙氨酸-L-丝氨酸氨基酸体系中固溶体和热变形的极限

确定了L-丙氨酸-L-丝氨酸（L-ala-L-ser）氨基酸系统中固溶体和热变形的极限。使用粉末X射线衍射技术研究了具有不同比例的组分L-ser / L-ala的十三种氨基酸混合物。发现该系统中固溶体的区域相当有限并且覆盖小于10mol。每个组件侧的％。通过温度分辨粉末X射线衍射研究了组分L-ser和L-ala的热行为以及组成L-ser / L-ala ＝ 90/10。L-ser和L-ala的加热只会引起热变形，而具有90/10 L-ser / L-ala比的两相混合物会在高温下形成固溶体。此外，还计算了L-ser和L-ala的热变形张量的参数，绘制并分析了它们的热膨胀系数。进行的研究具有很高的适用性，因为氨基酸是各种生物，地质和工艺过程（包括高温过程）的活性成分，并且在生命科学行业中具有许多应用。