四体

Studies on four novel classes of glycosyl donors for the stereoselective synthesis of 2-S-2-deoxy-β-glycosides, via 1, 2-migration and concurrent glycosidation.

一、发展了四种糖基给体，通过硫的1，2—迁移，并同时进行糖苷化的方法，立体专一的合成了一些2位硫代β糖苷。

According to their mineral assemblages, the granulite xenoliths entrained by Cenozoic Hannuoba basalts are divided into four groups: felsic granulites, noritic granulites, two-pyroxene two-feldspar granulites and two-pyroxene granulites, with the two-pyroxene granulites most common.

根据矿物组合特征，汉诺坝玄武岩中的麻粒岩捕掳体可划分为四种类型：长英质麻粒岩、苏长质麻粒岩、二辉二长麻粒岩和二辉麻粒岩，其中以二辉麻粒岩最为常见。

Frequent meteor impacts, fierce radiation, and harsh temperature fluctuations on Earth four billion years ago created an incredibly hostile environment for any half-formed, about-to-replicate complexity.

四十亿年前地球上频繁的陨石冲击，强烈的射线，大起大落的温差，给所有半成型、准备复制的复杂体造成了难以置信的恶劣环境。

AIM To study the direct effect of amiloride on recombinant human protein kinase CK2 holoenzyme and its kinetics. METHODS Recombinant human protein kinase CK2 α and β subunits were cloned,expressed and purified by gene engineering.

蛋白激酶CK2是一种真核细胞内普遍存在的信使非依赖性丝氨酸蛋白激酶，是由两个催化亚基和两个调节亚基组成的异源四聚体(α2 β2 、α′2 β2 或αα′β2 ) [1，2 ] 。

A novel lead ionselective polyvinyl chloride membrane electrode was prepared using 25,27di(2thiadiazolethiooxyethyl)26,28dihydroxyl5,11,17,23tetraptertbutylcalix[4]arene as the ionophore. The influences of the nature of plasticizers and the amounts of the incorporated ionophore and ionic additive on the response characteristics of the electrode were studied.

制备了以25，27二(2噻二唑基硫代乙氧基)26，28二羟基5，11，17，23四叔丁基杯\[4\]芳烃为载体的聚氯乙烯膜铅离子选择电极；研究了电极膜中增塑剂种类及载体和离子定域体含量对电极性能的影响。

Polymerase chain reaction: Laboratory technique used to make numerous copies of specific DNA segments quickly AND accurately.

聚合链反应：能快速、准确复制新大量特定去氧核糖核酸实验室技术。每一个核体不仅含有 DNA ，而且含有五种组织蛋白中的四种。

The forming process for the high-strength, steel-base modified polyformaldehyde composite material in five-laver structure is to melt modified polyformaldehyde by heating and roll to make the melt polyformaldehyde permeate into the gaps gaps between the large-grained spherical copper powder and screw copper nails.

四层结构的钢基铜塑复合材料的成型过程，是将改性聚甲醛加热熔化，经轧制，使熔融的聚甲醛渗透到大颗粒球形铜粉的间隙中，解决了三层材料复合过程中，熔融的聚甲醛水平流动性强过垂直方向的渗透性，造成了结合强度低的缺陷，使聚甲醛层与铜粉及基体结合更牢固，提高了其承载和抗剪切的能力。

It is flattened, short, and broad and is divided into two or four loculi valveso by a false septum, which bears the seeds.

形状扁平，体短且宽，果实内部被假隔膜分为二或四室，成为孕育种子的地方。

Keywords: polynuclear complexes; bridged-ligands; anti-cancer drug; 1,10-phenanthroline; dioxotetraamine macrocycle

中文关键词：多核配合物；桥联配体；抗癌药物； 1，10-菲罗啉；二氧四胺大环

Note: cyclophos phamide printing plate size to match the size with canducum; II suites have "+" words and which is the Basic Standard Edition; and aim at plates are usually marked with y, M.C, k (representing the yellow, red, blue, and black) four basic tags, and the Panel, which is directly above the \u25878-10％~ 100% of the screen to indicate their wish to color bar to show the network cable for sparse and dense pattern with the principal.

注：①印版尺寸给与铁皮尺寸相吻分；②版背给有&＋&字统及洋心线，这是尺度版的根基不本记；③印版凡是不本有Y、M.C、K（分别代表黄、赤、蓝、暗）四栽根基不本记，且版背侧上不圆均有－10％～100％的网线暗示彩条，以示网线的茂密与茂密与宾体图案的差照。

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。