Modification method for preperation of the active species is proposed on the basis of the effection of water in solution polymerization of butadiene in Ni catalyst systen.
结合我国BR用镍系催化剂活性种制备技术的研究和进展过程,讨论了各种活性种制备(催化剂陈化)方式对聚合活性的影响,根据水在镍催化体系丁二烯溶液聚合过程中的作用和粒子碰撞原理,提出了活性种制备技术的改进方向。
On the basis of 1H NMR and 51 V NMR, it was suggested that the peroxovanadate was the active species for the epoxidation of olefins, and the reaction mechanism was proposed.
根据烯烃环氧化控制实验中 1HNMR和 51VNMR谱的研究结果 ,提出了过氧钒物种是烯烃环氧化反应的主要活性物种 ,并假设了H15Li4V12 B3 2 O84催化烯烃环氧化反应的机理 。
Experimental results showed that the active species of the catalyst in methanol carbonylation differed from [Rh(CO)2I2]-reported in other literature.
研究证明,该类配合物在催化甲醇羰基化反应过程中,其活性物种区别于文献报道的[Rh(CO)2I2]-阴离子。
On the base of grasping the preparation technical of the high active crystal seed,it is very easy to manufacture the super-fine aluminum hydroxide products through controlling the appropriate conditions of precipitaion in the lab and the industrial manufacture.
根据铝酸钠溶液络和-聚合理论和结晶学的原理,我们提出了超细氢氧化铝种分分解理 论,在掌握高活性晶种制备技术的基础上,在试验室和工业生产上,控制适当的分解条件 很容易生产出超细氨氧化铝产品,经过一年多的工业生产,技术成熟,工艺先进,产品指标 达到国际同类产品水平,具有良好的市场前景。
The surface active oxygen species have been characterized by means of XPS, O2-TPD, etc.
同时,利用XPS,O2-TPD等方法对该体系催化剂的表面活性氧种进行了表征与研究,结果表明:催化剂的表面晶格氧与C2 选择性有关,表面吸附氧与甲烷转化(包括偶联和深度氧化)有关。
This paper developed a non steady state theory for imperfect living polymerizations with various equilibria between active and dormant species giving expressions of various molecular parameters, such as the number and the weight average degrees of polymerization and the polydispersity index.
数值计算的结果表明，在链增长反应速率比休眠物种和活性物种之间的相互转化速率大很多时，聚合反应不易达到稳态；当上述两种反应速率比较接近时，体系较快即能达到稳态，只有在反应开始的阶段，稳态和非稳态的理论结果有所差别。
The Variation of PPO Activity in Wheat Varieties and the Selection of Low PPO Activity of Wheat Germplasms;
小麦品种多酚氧化酶活性的变异及低PPO活性种质资源的筛选
Special surfactants and functional surfactants(Ⅳ)--Application of organic silicone surfactants
特种表面活性剂和功能性表面活性剂(Ⅳ)——有机硅表面活性剂的应用
pursue a creative activity; be engaged in a creative activity.
从事一种创造性的活动；投身于创造性的活动。
The techniques of activation and modification are overviewed.
本文概述了活性炭的各种活化和改性处理技术。
An effective method of measuring the activity of higher microorganisms in activated sludge
一种测定活性污泥中高等微生物活性的方法
Two models for estimating activation energy of phenol desorption on modified activated carbons
二种估算苯酚在改性活性炭上脱附活化能模型
Comparative of biological activities of skin peptides from four amphibians
4种蛙皮肤活性肽的提取及生物活性比较
Research on the Wheat Seed Viability and Its Relevance with Dehydrogenase Activity
小麦种子活力及其与脱氢酶活性的相关性研究
Study on Seed Germination Charictaristic and Seed Vigor Changes of Three Elm Species
三种榆属树种种子萌发特性及活力变化的研究
The Research on Changing Characteristics of Microbe Population in Activated Sludge;
活性污泥微生物种群变化特性的研究
The activity and oviposition behavior in common four necrophagous fly specie.;
四种常见尸食性蝇类活动与产卵习性
ADSORPTION PERFORMANCE OF THREE DIFFERENT ACTIVATED CARBONS FOR INDOLE AND PYRIDINE
三种活性炭对吲哚和吡啶的吸附性能
The Effect of Fiber Species on the Performance of Activated Carbon Filter Paper
纤维种类对活性炭过滤纸性能的影响
Effect of carbon substrates on the characteristics of activated sludge flocs
基质种类对活性污泥絮体性状的影响
Studies on the Bioactive Components of Two Species and Volatile Constituents of Eight Species;
两种植物活性成分及八种植物挥发性成分研究
Depletion of this small molecule is a common consequence of increased formation of reactive oxygen species during increased cellular activities.
细胞活性增加时活性氧物种生成增多经常导致这种小分子的损耗。
This serious mental exercise of necessity draws us to reflect upon our own lives.
这种严肃的灵性的活动让我们反思自己的生活。
The dehydrogenase activity, acid phosphoesterase activity and seed vigor were improved by N fertilizer application.
施氮肥提高了结缕草种子脱氢酶活性和酸性磷酸酯酶活性和种子活力。