Clearly abnormity can be obtained when using the radon and its daughters survey in prospecting for sandstone-type uranium deposits.
氡及其子体测量用于寻找砂岩型铀矿床上能够形成清晰的异常,但氡及其子体测量方法较多且各具有不同的特点。
SSH of Porphyra haitanensis for analyzing the expression profile differences between sporophyte and gametophyte;
坛紫菜孢子体和配子体世代之间的SSH分析
Combination of non-thermal plasma and heterogeneous catalysis for removal of low concentration benzene hydrocarbons in air;
非热等离子体与催化相结合去除气相低浓度苯系物
Extraction and separation of intermediates in plasma degradation of benzene;
苯等离子体降解中间产物的萃取与分离
Effects of energy injection on removal of benzene hydrocarbons in the air by discharge plasma;
能量注入对放电等离子体去除气相苯系物的影响
A novel MgCl_2-supported Ziegler-Natta catalyst using poly(propylene glycol)dibenzoate (PPGDB) as the internal electron donor for propylene polymerization was prepared.
采用聚丙二醇二苯甲酸酯(PPGDB)为内给电子体制备了一种新的丙烯聚合催化剂MgCl2/PPGDB/TiCl4。
Propylene polymerization was studied with TiCl4/MgCl2/1,3-diol dibenzoate(LLX)/diisobutyl phthalate(DBP) as catalyst,in which LLX/DBP was used as internal electron donor compounds.
对TiCl4/MgCl2/1,3-二醇酯(LLX)/邻苯二甲酸酯(DBP)复配内给电子体催化剂的丙烯聚合行为进行了研究。
This paper summarized research and development status of Ziegler-Natta catalyst for polymerization of ethylene and propylene,and focusing on the progress of propylene polymerization catalyst with a new diether compounds as internal electron donor.
综述了ziegleer-Natta催化剂在乙烯聚合和丙烯聚合方面的研究开发现状,重点介绍了采用新型二醚化合物作为内给电子体的丙烯聚合催化剂的进展。
Based on the analysis of current woman shape classification standards abroad and the indicators applied in domestic woman shape classification,this paper proposes some measures for the purpose of improving the classification of woman shape in China.
文章分析了国外现行的几种女子体型分类的标准及我国处于研究阶段的几种女子体型分类指标,提出我国女子体型分类的改进措施。
Service status of several common checker was introduced,some open questions on checker in China were pointed out and computational method of checker volume was presented.
介绍了最常用的几种格子砖使用情况,指出国内一些熔窑格子体存在的问题,提出了以熔窑所需的单位助燃空气量(Nm3/s)来计算格子体体积的方法。
It is pointed out that the clearing of regenerator checkers by liquefied petrol gas can give the following advantages : easy operating, cost saving,product quality improving and furnace campaign prolonging.
通过用底烧液化石油气法疏通蓄热室格子体,既简单方便又节约了成本,使产质量得到了提高,又延长了窑炉寿命。
The blockage of semi-connection regenerator from collapse of checker-work brick lead exhaust gas to leave out and increase furnace pressure, which intensify furnace damage.
半连通式蓄热室格子体倒塌堵塞严重,引起废气难排出,造成窑压增大,窑炉烧损加剧,采用局部疏通法热修格子体,可取得良好的效果。
The functions of electron donors in the Ziegler-Natta catalyst system for polypropylene;
丙烯聚合Ziegler-Natta催化剂中给电子体的作用
Overviews development situation of Basell Z-N catalyst for polypropylene production,emphasizing on the latest development of internal and external electron donors.
综述Basell公司聚丙烯Z-N催化剂进展情况,特别介绍了内、外给电子体的最新进展。
Evaluation of New Highly Activity Donor in Industrial Application;
几种高活性外给电子体工业应用评价
The Application of Domestically-made Electron Donor in PP Plant of Daqing;
国产给电子体在大庆聚丙烯装置上的应用
1 MPa for 2 hours, which tested the crystallized properties of polypropylene by separately using the combination of catalyst X1,catalyst X2,import catalyst TK260,domestic catalyst YH842 with three other kinds of outer-donors.
1 MPa、时间2 h条件下进行实验,测试了催化剂X1、X2、进口催化剂TK260、国产催化剂YH842与3种外给电子体组合所制备的聚合物的结晶性能;讨论了外给电子体、Al／Si对催化剂活性、聚合物结晶性能的影响;指出外给电子体的种类及Al／Si是制备高结晶聚丙烯(HCPP)的关键因素。