化学家们在实验室合成有机化合物的时候，常常会得到一堆分子：一半右旋，一半左旋。

When chemists synthesize organic compounds in the lab, they often wind up with a mix of molecules: half are right-handed, and half are left.

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目的建立适用于纳米铁包合物中铁及右旋糖酐含量测定的方法。

Objective to establish an optimal method to determine the contents of Fe and dextran in the nanometer iron compound.

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结果：在止痒实验中，地肤子醇提物能明显降低右旋糖酐诱导的小鼠瘙痒发作次数及瘙痒持续时间，并可增加豚鼠耐受磷酸组织胺的致痒阈。

Results:In antipruritus assay, Kochia acoparia-alcohol extract could decrease scratching frequency and duration induced by dextran , and increase itch-threshold of cavy caused by histamine phosphate.

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