二聚的

The reaction of tetrachloromethane with magnesium under general Grignard reaction condition was studied.

林海霞，徐良衡，黄乃聚，四氯化碳与镁的反应及其反应机理的研究──产生二氯卡宾的新方法

A series of new poly polyamines have been synthesized and characterized by means of element analysis and FT-IR etc. The tough effect of these PPAs on epoxy resin/diethylene triamine systems was examined.

合成了一系列新型的聚氧化丙烯多胺，并对其结构进行了表征，同时研究PPA添加到双酚A环氧树脂-二乙烯三胺体系中对环氧树脂固化过程的影响以及对固化环氧树脂的增韧效果。

Using trimeric surfactant C_(14-2-14-2-14) as templating agent, the low cost and facile inorganic species sodium aluminate and sodium silicate as inorganic precursors, highly ordered 2D hexagonal aluminosilicate MCM-41 with high Al content were successfully synthesized.

利用廉价易得的硅酸钠和偏铝酸钠作为无机前驱体，以低聚季铵盐表面活性剂C_(14-2-14-2-14)为模板剂合成了高铝含量，高有序性的二维六方结构介孔硅铝酸盐材料，并对材料的结构、表面性质、形貌以及酸性进行了研究。

Extracted DNA by CTAB, in proportion to the additions of PVP and β-mercap toethanol to the extraction buffer were capable of preventing browning from taking place in the extraction, Tris-Phenol (Stabilized with 0.1M Tris, pH 8.0)/Chloroform/isoamyl alcohol were used to remove protein and impurity in the second extraction, during crude DNA used to Isopropanol DNA and deterged by DNA detergent, without using RNase remove RNA, we detected the quality and concentration of DNA respectively for normal leaves and drought stress leaves by Agarose gel electrophoresis of genomic DNA and ultraviolet spectrometry photo.

用20%聚乙二醇(polyethylene glycol，PEG6000)模拟干旱，采取CTAB提取缓冲液，按一定比例加入PVP和β-巯基乙醇，用Tris平衡酚－氯仿－异戊醇除去蛋白质及杂质，在粗提时用异丙醇沉淀DNA，并用DNA洗液（10mmol/L醋酸铵，75%乙醇）洗涤DNA，在纯化时用乙醇沉淀DNA，且没有加入RNase去除RNA的方法，分别提取2个品种正常和干旱胁迫的苹果属叶片总DNA，并对提取的DNA进行琼脂糖凝胶电泳和紫外分光光度计检测。

Polyarylene sulfide is disclosed, of which extract with methylene chloride is in an amount of not more than 0.7 % by weight, a melt viscosity V6 is 20 to 15,000 poises and a content of -SX groups is at least 15 micro moles/g, wherein X represents an alkali metal or a hydrogen atom.

被公开的是聚芳硫醚，其具有二氯甲苯提出物的最为不大于0.7％重量，熔体粘度V6为20～15000泊和－SX基的含量至少为15微摩尔／克，其中X代表碱金属或氢原子。

A wisecracking professional matchmaker breaks the ice as 40 people aged in their twenties and thirties gather at a hotel for a blind date .

40名二三十岁的年轻男女聚在一个酒店参加一场相亲会，一位俏皮的专业媒人打破了现场的沉默。

Acetate Substitution, A benzene solution (10 mL, 20% w/v) of alkyl halide also containing 0.5 g of PEG or tergitol was added to 1.5 g of solid, dry potassium acetate and the resulting suspension heated to reflux.

醋酸换人，苯液（ 10毫升， 20 ％瓦/五）烷基卤化物还含0.5 g的聚乙二醇或tergitol添加以1.5克的固体，干燥醋酸钾和由此产生的悬浮加热回流。

The carrier gas is nitrogen, headspace plate temperature is 70℃.

方法使用配置顶空进样的气相色谱仪，以水为溶剂，色谱柱为 Agilent DB-624毛细管色谱柱（6%氰丙基苯基-94%二甲基聚硅氧烷），柱温：40℃，保持 12min ，以30℃· min-1 的速度升温至100℃，保持 5min ，再以40℃· min-1 的速度升温至240℃，保持 5min ；以氮气为载气，柱流速0.7mL · min-1 ；氢火焰离子化检测器；顶空加热盘温度70℃。

Low molecular weight liquid polyethylene glycols as a novel green solvent for organic reactions have been attracting great attention.

低分子量的液态聚乙二醇作为一种新型的绿色有机反应溶剂正受到人们的极大关注。

The development of molecular-based therapies for the treatment of chronic hepatitis C virus infection is an area of intense clinical research, driven by the inability of the current standard of care, combination therapy with pegylated interferon alfa (PEG-IFNalpha) and ribavirin, to achieve a sustained virologic response in a large proportion of patients and by the lack of approved alternative therapies for PEG-IFNalpha/RBV nonresponders and relapsers.

目前慢性丙肝的标准治疗，聚乙二醇干扰素联合利巴韦林可以使大部分人群获得持续病毒学应答，但对无应答者和复发者缺乏获批准的治疗，这一现象驱动了基于分子的治疗发展成为临床研究方面热门领域。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。