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目的：为了探讨桂皮类中药中草酸钙晶体的形态及分布特征。方法：应用光学显微镜和电子显微镜对１０种不同基源的４０件桂皮样品中草酸钙晶体进行了研究。结果：发现基源相同的样品中草酸钙晶体的形态变化不大，有一定的规律，但晶体的数量、大小及超微特征常常受多种因素影响。结论：草酸钙晶体的形态及分布规律完全可作为桂皮类中药鉴别的一个指标。
Objective: To investigate the morphology and distribution characteristics of calcium oxalate crystals in cinnamon Chinese medicine. METHODS: Calcium oxalate crystals in 40 samples of cinnamon from 10 different sources were studied using light and electron microscopes. RESULTS: It was found that the morphology of calcium oxalate crystals in the samples with the same basic source had little change and had a certain regularity. However, the number, size, and ultra-microscopic features of crystals were often affected by many factors. Conclusion: The morphology and distribution of calcium oxalate crystals can be used as an indicator for the identification of Chinese cinnamon medicines.