Objective: To investigate the content of trace element in serum and the condition of cell-mediated immunity in patients with recurrent aphthous ulceration (RAU).

目的：探讨复发性口腔溃疡(RAU)患者血清中微量元素含量及细胞免疫功能状态。

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AIM: To investigate the influence of changes of serum trace element and oxygen free radical levels on the impairment degree of brain tissue in patients with acute cerebral ischemia.

目的：探讨脑梗死患者急性期血清微量元素和氧自由基水平变化对脑组织损害程度的影响。

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Methods: Trace element zinc in serum was determined by the atom absorption spectrum method.

方法：用原子吸收光谱法测定银南地区儿童微量耳垂血血清微量元素锌。

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