金属环

This dissertation divides into seven chapters and the main contents and conclusions are listed as following:1. Three series binuclear lanthanide carboxylate coordination polymers 1～7 have been synthesized under hydrothermal conditions by altering the length of carbon chains between carboxyl group and phenyl ring on ligands, which are isophthalic acid, 1,3-phenylenediacetic acid and 1,3-phenoxydiacetic acid, and lanthanide ions such as Pr~(3+), Eu~(3+)and Ho~(3+).

论文共分七章，主要研究内容和结论如下：1、通过改变间苯二甲酸配体的羧基和苯环之间的碳链长度，从间苯二甲酸、间苯二乙酸到间苯二氧乙酸，以及改变稀土离子半径Pr~(3+、Eu~(3+)和Ho~(3+)出发，在水热条件下制备了三个系列双核金属单元的稀土羧酸二维配位聚合物1～7。

Many girls love a circlet of pearls.

许多女孩喜欢镶嵌珍珠的贵重金属冠环。

Cucurbit[6]uril adducts with metal cation and naphthylamine in the water, be a new supramolecular adducts.

在水溶液中，六元瓜环与金属阳离子及萘胺发生作用，形成一种新颖的超分子配合物。

Operation operation undertakes by convention, neck of the palace in art injects fragrance too the Buddhist nun 0.5~1mg. 2 results are used fragrance too after the Buddhist nun, 30 take out IUD smoothly: The muscularity that lug block is pulled outwards when?0 exemple ticks off annulus, the consideration has a part to embed, pull IUD lower edge forcibly appropriately to the mouth outside palace neck, two hemostatic clamp are fixed, the clipping between two clamp, pull straight hind take out; to 3 are probed feel without apparent metal, pull via after small curette blows the film inside the uterus gently, be being pulled take out; to because menopause time is too long,have 2, palace neck is beyond the mark atrophic, bougie not...

手术操作按常规进行，术中宫颈注射芬太尼0.5~1mg.2结果使用芬太尼后，有30例顺利取出IUD：有10例勾环时向外牵拉阻力大，考虑有部分嵌顿，适当用力将IUD下缘拉至宫颈外口，两把止血钳固定，两钳间剪断，拉直后取出；有3例探查无明显金属感，经小刮匙轻刮子宫内膜后牵拉取出；有2例因绝经时间太长、宫颈过分萎缩、探针不。。。

The influence of a transition metal acetylacetone catalyst on the behavior, mechanism and product structure of the co-curing of epoxy and cyanate was studied by DSC and FT-IR.

应用DSC、FT-IR对乙酰丙酮过渡金属络合物催化促进的环氧树酯与氰酸酯共固化反应行为、历程以及固化物的结构特征进行了研究探讨。

The influence of different metal ions on the cyclization of two different linear heptapeptides was studied.

首次系统地研究了不同金属离子对两个结构不同的线型七肽环化反应的影响。

The influences of solvent, reaction temperature, and time on the conversion of cyclohexane were examined.

以环己烷氧化为探针反应，考察了上述负载催化材料的催化性能并分析了不同金属离子或取代基对催化剂活性及选择性的影响。

A series of double metal cyanide complex catalysts were prepared in two different methods by using β-cyclodextrin, PEG-1000 or Tween-60 as an additional complex ligand respectively, and the effects of different kinds of additives and preparation methods on the appearance, particle diameters, crystal constitution and activity of DMC catalysts were also studied.

分别以PEG-1000、β-环糊精和吐温-60等为助络合剂，采用不同工艺方法制备了具有不同结构的双金属氰化物络合物催化剂，研究了不同助络合剂和不同制备方法对DMC催化剂的形貌、粒径、晶型结构和催化活性的影响。

In other part stood one who at the Forge Labouring, two massie clods of Iron and Brass [ 565 ] Had melted (whether found where casual fire Had wasted woods on Mountain or in Vale, Down to the veins of Earth, thence gliding hot To som Caves mouth, or whether washt by stream From underground) the liquid Ore he dreind [ 570 ] Into fit moulds prepar'd; from which he formd First his own Tooles; then, what might else be wrought Fusil or grav'n in mettle.

他们那飞快的弹拨，通过高低音阶的协和，得心应手地奏出奔腾浩荡回环激荡，余音袅袅的旋律。另一方，一个把铁在熔炉旁劳动和青铜熔合的汉子。那流动的矿水被注进备好的模子里。从模子里，他们首先造出自己的劳动工具，其次，铸造或雕刻其他各种金属物品。

Although underlying mechanisms ⑴ hae not been elucidated, eidence points to the participation of the nitric oxide and cyclic guanosine 3',5'-monophosphate system.

虽然根本的机制还没有阐明，但是证据显示一氧化氮和环鸟苷酸系统参与其中。这里，我们检测到在MC3T3-E1成骨细胞的分化中基质金属蛋白酶13的mRNA，蛋白和活性的升高，诱生一氧化氮合酶和一氧化氮产物的升高。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。