查询词典 triple bond

The result showed that Si--Si covalent bond eAsts in the melt of eutectic and hyper--eutectic alloy and Sr has capability to weaken the coto bond.

结果表明，在共晶及过共晶的合金的液态结构中，存在着Si—Si共价键，Sr有削弱这些共价键的倾向。

Compared with the double bond of cyclopentene ring, the double bond of the norbornene ring has much more lower activation energy in the hydrogenation and the main intermediate product is 14,15-DHTCPD.

非晶态合金催化剂晶化过程的原位分析结果表明，在热处理温度低于150°C条件下其结构基本保持稳定，而高于450°C条件下热处理后晶化度大于90%，600°C以上热处理后完全晶化。

The double bond in norbornene ring of TCPD was easily saturated at a low temperature, and an intermediate 12,13-dihydrotricyclopentadiene (12,13-DHTCPD) was formed. Higher temperature and hydrogen pressure were required for the saturation of remaining double bond in cyclopentene ring to generate a completely hydrogenated compound tetrahydrotricyclopentadiene.That is to say, the reaction occurred via the TCPD→12,13-DHTCPD→THTCPD route.

采用气质联用、红外光谱和核磁共振对加氢产物进行表征，发现在加氢反应中TCPD的降冰片烯双键首先被饱和，生成中间产物12，13-二氢三环戊二烯(12，13-DHTCPD)，残留的环戊烯双键需要在更高的温度和氢压下反应生成四氢三环戊二烯，即反应按照TCPD→12，13-DHTCPD→THTCPD的途径进行。

Plasma sprayed dicalcium silicate bond tightly to Ti-6Al-4V substrate, its bond strength is up to 38.9 MPa.

等离子喷涂硅酸二钙涂层与 Ti-6Al-4V 基体结合强度较高，其值可达38.9 MPa 。

Since the improper blue-shifted H-bond and dihydrogen bond were found,the unusual phenomena have attracted more and more attentions of scientists.

特别是反常蓝移氢键和双氢键的发现，更加引起了科学家们的广泛关注。

In chapter four, the preperation of ytterbium diiodide was examined. The reductive cleavage of Se-Se bond and S-S bond induced by ytterbium diiodide was investigated. The reaction of diselenides and disulfides with allylic bromide promoted by ytterbium diiodide was also examined. The intermolecular Barbier-type reaction induced by ytterbium diiodide was studied. In the last section of this chapter, the intermolecular reductive coupling of nitriles with azides induced by samarium diiodide was investigated.

第四章，研究了二碘化镱的制备方法，以及二碘化镱作为一种优良的单电子转移试剂在有机合成中的应用：二硒醚的Se--Se键和二硫醚S-S键的还原断裂，及其在合成烯丙基硒醚，硒代酯和烯丙基硫醚，硫代酯中的应用，实验结果表明二碘化镱也能促进分子间的Barbier反应，而文献认为二碘化镱不能促进分子间的Barbier反应；最后研究了二碘化钐促进的叠氮化合物与腈的交叉还原偶联反应，一步高收率地制备脒的方法。

for preparing n-boc or n-cbz derivatives of chiral alpha,alpha'-disubstituted pyrrolidines containing olefinic bond and acetylene bond

一种制备含烯键和炔键取代基的手性α，α'-二取代吡咯烷的n-boc或n-cbz衍生物的方法

The enzymolytic products identified were:diisopro-pylaminoethanethiol through the breakdown of P-S bond, and its oxidized product, N, N'-dithiodiethylene-bis ; and diisopropyla-minochloroethane through the breakdown of S-C bond.

VS与电鳐乙酰胆碱酯酶作用的主要产物是： P—S键断裂产物二异丙氨基乙硫醇，该化合物在水溶液中不稳定，可进一步氧化为N，N＇-双二异丙氨基乙基二硫醚；S—C键断裂产物二异丙氨基氯乙烷。

Beginning from the viewpoint that corporation bond is a kind ofcredit tool essentia lly, the paper designs the transverse thread by credit lega l system,which is property right foundation, credit service, oneself credit, credit disclosure ofcorporation bond's credit.

因此公司债券契约是其纵向结构的起点。为此，论文首先分析公司债契约以统领该纵向结构，然后依次探讨公司债发行转让、公司债存续期间的公司债管理途径和公司债与公司治理问题。

Thiol groups were good to be used in functionalizing gold nanoparticles, and ester bond formation and breakage played the major role in this research. Thioctic acid and 11-mercapto-1-undecanol were used to functionalize the gold nanoparticles and form ester bond by using the carboxylic acid group on thioctic acid and the hydroxyl group on 11-mercapto-1-undecanol. Concentrated sulfuric acid was used to be the catalyst in this reaction, and sodium hydroxide was added for the proceeding of the reverse reaction.

硫醇官能基在金奈米粒子的修饰有很好的效果，利用带有硫醇官能基之tioctic acid 与11-mercapto-1-undecanol (11-MUDO)分子修饰在金奈米粒子上，并使TA上之羧基和11-MUDO上之羟基脱水生成酯化键，浓硫酸则是反应中的催化剂，而氢氧化钠则可促使系统进行逆反应。

Wenxing consistently adheres to the principle of "trict Management,All Member Participation,Quality First,Users Foremost" and follows the business philosophy of excellent quality,highly active and pursue excellence,thus outdoing its counterparts in terms of technology,production scale and administration.

文兴一贯秉承&严格管理、全员参与、质量第一、用户至上&的企业方针，遵循优质、高效和追求卓越的经营理念，从而实现在技术上、规模上、管理上处于同行领先地位。

The left atrium of the guinea pigs was innervated by the two afferent system.

豚鼠左心房受心脏的两个传入系统的双重支配。