关环转换反应是形成碳碳双键的重要反应之一,即双烯化合物在金属碳烯催化下关环得到环烯类化合物。
Ring closing metathesis (RCM) of dienes to cycloalkene provides an important tool for C-C double bond formation catalyzed by metal carbene.
本文概述了关环转换反应所用催化剂体系及其在天然产物合成中的应用,内容涉及到碳环及含氧、含氮杂环天然产物的合成。
This paper reviews the catalyst system in RCM reaction and RCM application in the synthesis of natural products including carbon ring, oxygen heterocycles and nitrogen heterocycles, etc.
一些青少年已经转换了一个特定的基因——糖皮质激素受体(GR)——帮助调节体内荷尔蒙对于压力的反应。
Some of the teens had changed to one particular gene—the glucocorticoid receptor (GR)—that helps regulate the body's hormonal response to stress.
你无法改变既定的事实,但是你可以转换你对这件事的反应。
You can't change what happened, but you can change how you react to it.
反应副产物是水和氧化镁,而氧化镁然后又可通过使用太阳能激光法转换成镁。
The byproducts are water and magnesium oxide, which can then be converted back into magnesium using the solar laser.
所有的受试者会定期会见他们各自的医生,并且患者的治疗后的反应会纪录在一张疼痛量表上,并被转换成所需止疼药的总量。
All the study participants met regularly with their doctors, and each patient's response to treatment was measured on a pain scale, as was the amount of pain medication required.
迅速地再次应用修改了的转换,从而生成将变更反应到实现架构上的解决方案工件。
A modified transformation is rapidly reapplied to generate solution artifacts that reflect a change to the implementation architecture.
对于大多数网络用户来说,网站设计者长期以来一直设立内容的重要性、快速的反应时间和下载速度、更高的转换率、更高的感知可信度、并降低用户受挫等制作网站的标准。
The importance of download speed, for most Web users, has long been established (King 2008).
您的信息技术(IT)反应能力必须足够快,以基于所检索到的信息转换您的设计元素。
Your information technology (IT) reflexes must be quick enough to transform elements of your design based on the information you retrieve.
一致性意味着事务代表应用程序状态的正确转换——即事务不能违反应用程序中固有的任何完整性限制。
Consistency means that the transaction represents a correct transformation of the application state — that any integrity constraints implicit in the application are not violated by the transaction.
我认为敏捷实践引入了文化的改变,这引发了很多针对敏捷转换的强烈反应。
I think that Agile practices induce a culture shift and that's what creates a lot of backlash against Agile transformations.
第二种方法也被称作“反应炉裂解法”:利用高温和压力将纤维素生物质转换成长烃链,这种长烃链和汽油、柴油、喷气式发动机燃料相类似。
A second process, called thermochemical pyrolysis, USES high temperatures and pressures to convert cellulosic biomass into long hydrocarbon chains that are similar to gas, diesel or jet fuel.
在将固体燃料转换为合成气时,二氧化碳也会与正在形成的焦炭反应。
The CO2, as it's converting a solid fuel to a gas, also has the ability to react with the carbon char that is forming.
连锁反应释放出来的能被转换成热。
The energy released by the chain reaction is transformed into heat.
日本在1999年就曾发生过一次4级核事故(又称“东海村核事故”——译注),当时在日本核燃料转换公司(Japan NuclearFuel Conversion)的一个燃料厂内,三名正在为反应堆准备燃料的工人引发了一次链式核反应,使反应堆达到临界状态。
Japan itself had a Level 4 accident in 1999, when three workers preparing fuel for a reactor at a Japan Nuclear Fuel Conversion plant triggered a nuclear chain reaction, called a criticality.
Harris指出,世界上几乎95%的氢是由天然气生产的,其方法是使甲烷与水蒸气在化石燃料转换器中发生反应生成氢和二氧化碳。
Harris points out that around 95 per cent of the world's hydrogen is already sourced from natural gas, using fossil fuel reformers that react methane with steam to produce hydrogen and carbon dioxide.
预先的准备,可以转换那反应敏捷的能量格栅,缓和预期的回应。
Preparation in advance can shift the responsive energetic grid and alleviate what can be expected responses.
对甲苯不同的反应条件的影响转换是研究和讨论。
The influence of different reaction conditions on toluene conversion is examined and discussed.
完善地震加速度时程曲线与反应谱曲线之间转换的有限元程序。
Complete the finite element procedure of conversion between epoch curve and reaction curve of earthquake acceleration.
析氢反应在电化学能量转换、电化学工业、金属腐蚀和防护以及金属的电沉积等方面都具有重要的意义。
Hydrogen evolution reaction is significant to apply to electrochemical energy conversion, electrochemical industry, metallic corrosion and protection and metal electrodeposition.
近年来研究较多的执行功能包括:双任务协调、注意转换、抑制优势反应、记忆刷新等。
In recent years, several executive functions have been studied, including dual-task coordination, inhibition of prepotent responses, attention switching, and memory updating, etc.
这里光能被转换成化工能量和被存放在AT P里,将参加化学反应发生在第二阶段。
Here light energy is converted into chemical energy and stored in ATP, which will participate in chemical reactions which occur in the second stage.
在太阳能转换与储存体系中,降冰片二烯光异构化合成四环烷是非常重要的一个反应。
In the solar energy transfer and storage system, the isomerization of norbornadiene and quadricyclane is an important reaction.
如果它是一个在电子反应中,的好捐赠者,如果相同电子发现他在共价电子里,它将成为一个好的捐赠者,虽然没有完全转换。
Well, if it is a good electron donor in an electron transfer reaction, if the same element finds itself in a covalent bond, it is going to be a good electron donor, although it is not full transfer.
为减小长周期反应谱的计算误差,本文提出一个计算长周期反应谱的转换模型和与之相应的精确计算方法。
The transition model and relevant precise method for calculation of the long period portion of response spectrum is proposed to reduce the calculating errors.
机械化学反应是指将化学能与机械能直接相互转换的过程。
Mechanical chemical reaction refers to the course of exchangement between chemical energy and mechanical energy.
通过化学反应和柱层析,AA转变为PGG_2和PGH_2的转换率大约为34%,前列腺素内过氧化物的纯度可达90%以上。
The conversion rate from AA into PGG2 and PGH2 by chemical reaction and column chromatography was about 34%. The purity of endoperoxide products was more than 90%.
这样的人会对每一个印象反应强烈,但印象转换得很快。
Such an individual responds strongly to every impression, but impressions pass quickly.
生物质气化技术,就是生物原料在缺氧状态下加热反应的能量转换过程。
Lives the material gasification technology, is biological raw material heats up the response under the anoxic condition the energy conversion process.
生物质气化技术,就是生物原料在缺氧状态下加热反应的能量转换过程。
Lives the material gasification technology, is biological raw material heats up the response under the anoxic condition the energy conversion process.
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