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为了解中药中微量元素的含量与其药物的作用机制关系,用原子吸收分光光度计测定了玄参、生地黄、紫草、水牛角、牡丹皮、赤芍中铁(Fe)、镁(Mg)、铜(Cu)、钙(Ca)、锌(Zn)、铬(Cr)、钼(Mo)等7种微量元素的含量.结果表明,Ca的含量最高,Cu的含量几乎最低.这6种中草药含有多种对人体有益的微量元素,与它们的药... 相似文献
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Three time scales of a fissioning nucleus starting from the ground state to the scission point are defined and calculated by the Monte Carlo method. The result shows that the time of oscillating around the saddle point is longer than both the mean first passage time from the ground state to the saddle point and the time of descent from the saddle to scission points. Thus it is suggested that more neutrons could be emitted from a hot heavy fissioning nucleus during the period of the stretching and contracting of the deformation process. 相似文献
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