查询词典 metathesis

In this paper, TiC\TiN\TiCN nanocrystals were successfully prepared at low temperature via chemical metathesis method.

寻求简单而经济的合成方法来制备这些材料具有重要的理论和现实意义。

Olefin metathesis opens up new industrial processes for the production of important olefins in the field of petrochemicals.

烯烃交叉复分解反应作为石油化工领域一种重要过程，为各种单烯烃间的互相转化提供了一条有效的途径。

Therefore, it isthe emphasis to enhance the thermal stability and improve their tolerance of rutheniumcarbene complexes in olefin metathesis at present.

因此，提高钌卡宾配合物的稳定性，改善其对较强配位能力官能团容忍性是目前烯烃交互置换反应研究的重点。

In particular, the production of propylene and other important olefins via olefin metathesis reaction from n-butenes feedstock has received considerable attention.

特别是在利用正丁烯生产丙烯和其它重要单烯烃方面，复分解反应受到越来越多的重视。

It is be- lieved that ring-closing metathesis has wide scope of application and excellent activity under mild con- ditions and is suitable for the synthesis of complex molecules.

在这些应用中，RCM具有底物范围宽、良好的反应活性、反应条件温和的优点，是一种合成复杂分子的有效手段。

Historically, metathesis reactions were limited to molecules without important functional groups.

在此之前，置换反应通常只局限于非重要功能团的分子之间。

Synthesis and structure of double and multi-calix [4] arenes via ring closing metathesis .

2通过RCM方法设计合成外沿以冠醚链桥连的杯[4]芳烃衍生物。

Studying the sol-thermal and chemical metathesis synthesis of nanomaterial powder is the main task.

在课题研究期间，分别对溶剂热合成和化学交换法进行了研究与应用。

The chemical strategies for preparing magnetic iron oxide nanoparticles are reviewed and generalized in metathesis strategy and pyrolytic decomposition strategy in this paper.

本文对铁的氧化物磁性纳米颗粒的化学制备方法进行了综述，将其归结为复分解和热分解两种策略；总结了近期含铁的氧化物纳米颗粒组装体的研究进展，并对未来的发展做了展望。

Several kinds of ruthenium-catalyzed organic reactions were reviewed: hydrogenation ,oxidation,isomerization,metathesis.

综述了钌催化剂催化的主要几类有机合成反应，包括氢化、氧化、异构化、复分解。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。