螯合作用

The results are following:(1)We investigated the influence of the positional isomeric effect on structures.Due to the less space-crowding,it is easier for 3-pytpy to behave as bridging ligand than 2-pytpy under the same reaction conditions,while,it is easier for 2-pytpy to function as tridentate chelating ligand to construct supramolecular structures.

研究结果如下：(1)研究了两个吡啶取代三联吡啶配体的位置异构效应对配合物结构的影响。3-pytpy配体比2-pytpy具有更小的空间位阻，在相同的合成条件下容易以单-三齿桥联方式配位；而2-pytpy更易以三齿螯合形式配位，通过π…π堆积作用形成超分子结构。

It is shown from study results that the soluble iron has a strong controlling effect on the phytoplanktonic growth, and most of soluble iron is chelated with ligand such as siderophore with high affinity to Fe 3+.

研究表明，可溶性铁对浮游植物生长有很强的控制作用，大部分可溶性铁是同具有极强铁亲和力的配位体螯合在一起的，如铁载体。

Most attention has centered on detoxification of heavy metals by sequestering excess amounts of certain metal ions.

许多关于MT的研究是集中在它与某一过量重金属离子的螯合而起到重金属解毒作用。

Method］To synthesize the chelate iron using glycin and Fe2+ and measure the constructor of Ferrous Glycine Sulfate by IR spectrum and atomic absorption spectroscopy.

方法］用甘氨酸和Fe2+合成螯合铁，同时用红外光谱和原子吸收光谱对甘氨酸亚铁结构进行测定；并用大鼠贫血模型，观察甘氨酸亚铁补血作用。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。