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The recent advances in olefins oligomerization catalyzed by metallocene catalyst have been reviewed. Emphasis is given to the catalytic reactions, cyclization and prospect of application of metallocene catalyst.
中文意思:
摘要本文介绍近年来国内外在茂金属催化剂烯烃剂聚与环化方面的研究进展,主要侧重于茂金属催化剂烯烃剂聚,α,ω-二烯的环化及应用前景。


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The receiving voice is converted into vibration and reaches the finger tip via bone conduction. 接收到的声音被转换为振动,通过骨骼传导至指尖。
The recent academic interest in Hermeneutics has protruded the relationship between Marxism and Hermeneutics. 摘要在学术界出现的解释学研究热,使马克思主义与解释学的关系问题凸显出来。
The recent advance in optically pumped organic semiconductor lasers is reviewed,and for demonstration of electrically pumped organic semiconductor lasers,the present great goal are also discussed. 叙述了光泵浦有机半导体激光器的最新研究进展,对实现电泵浦(电注入)有机半导体激光器也进行了评述。
The recent advances about laser microbeam in plant transformation of exogenous gene, key techniques and applications are introduced. And the prospects is anticipated. 摘要本文概述了近年来激光微束在植物外源基因转化上的最新进展,激光微束转化法的关键技术及应用。并对其今后的应用前景作了展望。
The recent advances in asymmetric autocatalysis are reviewed in this article. 本文综述了近年来不对称自催化反应的新进展。
The recent advances in olefins oligomerization catalyzed by metallocene catalyst have been reviewed. Emphasis is given to the catalytic reactions, cyclization and prospect of application of metallocene catalyst. 摘要本文介绍近年来国内外在茂金属催化剂烯烃剂聚与环化方面的研究进展,主要侧重于茂金属催化剂烯烃剂聚,α,ω-二烯的环化及应用前景。
The recent advances in ultrasonic guided wave testing technique are summarized. 摘要综述近年来超声导波检测研究的最新进展。
The recent advances of sustainable petrochemical production technologies in the following fields are reviewed, including the atom economy oxidation of hydrocarbons with H2O2 as oxidant, green chemical synthesis with non-toxic and harmless raw materials, c 摘要围绕过氧化氢作氧化剂的烃类“原子经济”氧化反应、取代有毒有害原料的绿色化工技术、使用环境友好催化剂的化学反应、在新兴绿色溶剂中进行的化学反应、废弃聚合物的回收利用及由生物质资源生产石油化工产品和生物柴油等内容,评述了绿色可持续发展石油化工生产技术的一些新进展。
The recent agreement clinched by the ECB to finalize the deadline for lowering the charges and commi ion rates for tra -border tra actio and capital tra fer can serve as a case in point. 一个现成的例子就是,在欧洲央行最近的一项协议中,跨国界交易和资本流动的成本和银行佣金率降低的最后期限被。
The recent agreement clinched by the ECB to finalize the deadline for lowering the charges and commission rates for trans-border transactions and capital transfer can serve as a case in point. 一个现成的例子就是,在欧洲央行最近的一项协议中,跨国界交易和资本流动的成本和银行佣金率降低的最后期限被。
The recent application of thionly chloride in organic synthesis is reviewed,mainly focusing on the preparation of chlorinated compounds,alkenes,esters,amides,nitriles,cyclic sulfites and sulfinyl chlorides. 综述了近年来氯化亚砜在有机合成中的应用进展,主要涉及氯代化合物、烯烃、酯及酰胺、腈、环式亚硫酸酯、亚磺酰氯等化合物的制备。
 
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