查询词典 high molecular

Synthesis of super high molecular weight sodium polyacrylate by inverse suspension polymerization of acrylamide and sodium acrylate was studied.

以丙烯酸钠和丙烯酰胺为单体，采用反相悬浮聚合法制备了超高分子量的聚丙烯酸钠。

A new high-molecular-mass hydroxamic acid containing phenyl as high efficiency flocculant was synthesized by microemulsion polymerication.

摘 要：采用微乳液聚合法合成了一种带有苯环结构的新型氧肟酸类赤泥絮凝剂。

We explored many factors which influenced high efficient transformation of large DNA, such as prepartion of BAC invector and high-molecular-weight DNA, partial digestion, ligation, electroporation,,and provided a basis of construction of the whole library.

摸索了BAC载体制备、高分子量DNA制备、酶切、连接和电击转化等一系列环节对高效转化产生大片段DNA的BAC的影响，为整个文库的构建奠定了基础。

Exceed high molecular weight polyvinyl (English curtailment UHMW-PE )be thermoplastic engineering plastics it integrative all plastics's high-performance, but endure impulsive ,anti-abrasive ,endure chemistry eat away, oleiferous inhouse ,absorb impulsive energy this 5 piece behavioural is now deposit that is among plastics all tiptop numerical value.

超高分子量聚乙烯（英文缩写UHMW-PE）是热塑性工程塑料。它综合了所有塑料的优越性能，而耐冲击、耐磨性、耐化学腐蚀、自身润滑、吸收冲击能这五个特性乃是目前既存塑料中所有的最高数值。已成为一种引人注目的完全新型的产品。

In order to perform smooth cementing operations under high temperatures in deep wells, we developed an oil-well retarder WHJ with high molecular weight, which takes phosphatic compounds as its major raw materials.

为了确保深井高温条件下固井施工的顺利进行，以含磷化合物为主要原料研制出了高分子油井水泥缓凝剂WHJ。

A high molecular weight polyisobutenyl succinimide dispersant with high nitrogen content and good thermal and oxidative stabilities was developed.

采用氯化烃化工艺和后偶联反应技术开发了一种氮含量高、热稳定性和氧化稳定性好的高相对分子质量的聚异丁烯基丁二酰亚胺分散剂。

High molecular weight glutenin subunits 14+15 and 5+10 with good quality properties were introduced into the parents of high-yielding hybrid wheat XZ1 through biochemical marker assisted selection and greenhouse backcrosses breeding,and then gained hybrid wheat with 5+10,14+15,and pyramided 5+10 and 14+15 though cross-fertilize between parents with good HMW-GS.

随着社会的发展、人们生活水平的提高和消费意识的改变，品质育种已成为当今小麦育种的主攻目标之一。我国在十五&期间，提出了超级小麦育种&计划，力求产量、品质与环境的协调提高。杂种优势是生物界普遍存在的一种现象，是大幅度提高作物产量和品质的有效途径[1]。

It can be used to prepare polyethylene products with uniform granularity, high stack density, and uniform distribution of copolymerized monomers on high-molecular chain.

该催化剂具有制备过程简单。使用本催化剂可以制备颗粒均匀，堆密度高，共聚单体在高分子链上分布均匀的聚乙烯产品。

It is considered in this paper that the light and heat oxygen resistance ageings of silicone acrylate resin are better than those of normal acrylic and polyurethane resins, through the theoretic investigations into the reaction mechanisms of the light and heat oxygen ageings of high molecular polymer and contrasting, when exposed to light and under a high temperature, the changes in colour,shape, tensile strength and elongation of Silicone Acrylate Resin DX 8501 to the normal acrylic and polyur...

本文通过对高分子聚合物的光氧老化、热氧老化的反应机理的理论探讨和对DX8501硅丙树脂、普通丙烯酸树脂、普通聚氨酯胶膜在紫外光照射下和高温条件下的颜色、形态、抗张强度、伸长率的变化情况对比，认为硅丙树脂的耐光氧老化和耐热氧老化的性能优于普通的丙烯酸树脂和普通的聚氨酯。表3，参考文献8

Compared with the traditional method, this new method has some advantages:①centrifugation is not necessary, therefore, separation of high molecular weigh DNA is possible;②phenol, chloroform and other toxic organics are not needed;③separation is more efficient and less timeconsuming④the quality of DNA isolated in this way is very high.

当样品裂解液与杂交液1：1混合并用磁性微粒进行小麦黄化苗和种胚的DNA分离与纯化时，效果非常理想。与传统的纯化方法相比，该法具有①快速、简便；②无有机试剂污染；③无需离心分离；④得率和纯度均较高等优点。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。