c2h4

Plants are sensitive to the simple olefins , particularly C2H4 .

植物对简单烯烃是敏感的特别是乙烯。

Low humidity and C2H4 atmosphere go against the storage and the strawberry decay after 4 days .

低湿度及乙烯气氛不利于草莓的储存，仅4天就开始腐烂。

Ethylene ( ethane ) A gaseous hydrocarbon ( C2H4 ), produced in varying amounts by many plants , that functions as a plant HORMONE .

乙烯：是一种气态的碳氢化合物（C2H4），许多植物都可产生。

It can fix nitrogen from air , N-fix in g activity reaches 0 . 43 nmol C2H4 / vial .

同时培养料疏松，富有弹性。2.能固定空气中氮素，达到瓶小时0.43毫微克分子乙烯。

The reaction mechanism of atomic oxygen radical anion ( O - ) with ethylene ( C2H4 ) has been investigated at the G3MP2B3 level of theory .

在G3MP2B3理论水平下研究了氧负离子自由基（O-）与乙烯（C2H4）的反应机理。

For the purpose of recovering C2H4 from the vent gas of ethylene oxide ( EO ) plant , activated carbon ( AC ) selected as absorbent has been studied .

以活性炭为吸附剂，对工业环氧乙烷装置排放气中乙烯的回收进行了研究。

The gas yield increased with the increase of temperature . The low heating value ( LHV ) of pyrolysis gas would decrease because of the decomposition of CH4 and C2H4 at high temperatures .

升高热解温度有利于提高热解气的产量，但是高温会使CH4和C2H4裂解，从而造成热解气热值下降。

C2H4 , derived from natural gas and petroleum and used as a source of many organic compounds , in welding and cutting metals , to color citrus fruits , and as an anesthetic .

乙烯一种无色易燃气体，C2H4，可从天然气和石油中获得，用作许多有机化合物的来源，用于焊接和切割金属，柑桔属水果的着色，以及用作麻醉剂。

In this paper the carbon K-edge near edge X-ray absorption fine strucure spectra ( NE-XAFS ) of adsorption system C2H4 / Ni ( 100 ) are calculated by multiple-scattering cluster method .

本文用多重散射原子集团方法计算并分析了C2H4/Ni（100）系统的碳K边近边X射线吸收精细结构（NEXAFS）谱，确定了乙烯吸附在Ni（100）表面上的几何结构。

The SCC may be due to the superimposition of tensile stresses that take place during bending operation and working process of pure copper pipes , and the faint corrosion environment in CH4 + C2H4 liquid fraction .

分析认为，其原因是弯管加工和运行过程中产生了拉伸应力叠加，以及CH4＋C2H4液体馏份中微量腐蚀介质的联合作用。

Direct synthesis of crylic acid from CO2 with C2H4 is important one of the atom-economic reaction , and the technology of photo stimulated surface catalytic reaction ( PSSCR ) has been used to this reaction system at first time .

CO2和C2H4直接合成丙烯酸，是重要的原子经济型反应之一。

According to the simulations , the contributions to NOX reduction by HCN , C2H4 and char are compared , the reaction ways of HCN , C2H4 and char-N are analyzed in details .

根据计算结果，分析了再燃过程中HCN、C2H4及焦碳氮等重要物质的反应途径，及这些物质对还原NO的贡献。

In this paper , on-line monitoring and diagnosis system for traction transformer is designed based on DGA ( dissolved gas - in-oil analysis ) technology to realize the online monitoring the traction transformer oil dissolved gas H2 、 CO 、 CH4 、 C2H6 、 C2H4 、 C2H2 .

文章基于DGA技术的原理，设计了一套牵引变压器在线监测及故障诊断系统，实现了对牵引变压器油中溶解气体H2、CO、CH4、C2H6、C2H4、C2H2的在线监测。

With the lowest barrier heights and the significant transition states lower than the reactant , the dominant channel is a concerted step of involving H shift and C-O bond scission from the adduct C2H5OCN ( IM2 ) to give out the product C2H4 + HNCO .

考虑到最低的能垒高度和低于反应物的重要的过渡态，反应最主要的通道是从IM2开始涉及氢迁移和C-O键断裂协同步骤生成C2H4+HNCO的通道。