查询词典 cis-trans

In the asymmetric epoxidation of cis-β-methylstyrene, the selectivity and enantiometric excess for the epoxides reached 96% and 78%, respectively. The recyclability of the catalyst was also studied.

结果表明，该配合物对顺－β-甲基苯乙烯的不对称环氧化反应具有很好的催化性能，产物选择性达96%，ee值达78%，以顺－β-甲基苯乙烯为底物，m-CPBA为氧化剂，考察了该配合物催化剂的循环使用性能。

Structures of glycosyl ester of 13-cis-4-restinoic acid(5) and 6 were characterized by 1H NMR,13C NMR,IR and MS and confirmed to be β-configuration.

13-顺维甲酸与溴代-2，3，4，6-四-O-乙酰基-α-D-吡喃葡萄糖在4-二甲氨基吡啶催化下合成了13-顺维甲酸葡萄糖酯(5)，以二氧化锰为氧化剂，5经氧化成功地合成了新化合物13-顺-4-羰基维甲酸葡萄糖酯(6)。

Following dual titles in cross country at the end of 2007,the Gryphons repeated in the spring of 2008 winning track and field and track and field making Guelph the first school to win both men's and women's cross country and track CIS titles in one season.

下面的双冠军跨国家在2007年底， Gryphons多次在赢得2008年春季田径和田径决策圭尔夫大学的第一所学校获得两个男子和妇女的跨国家和跟踪独联体标题在一个赛季。

The geographic situation and membership in the CIS and in the South-Eastern Europe Stability Pact, in the framework of which Moldova has signed or is in process of signing free trade agreements, make the Republic of Moldova a jump-off ground for entering the ex-soviet and Balkan markets.

其在地理的位置良好，并且成为独联体和东南欧稳定公约成员国，因此，摩尔多瓦签署了或在签署过程自由贸易协定，这使摩尔多瓦到前苏国家和巴尔干市场

Moscow international security and fire equipment exhibition was established in 1995, the annual session is from the famous exhibition company ITE organized; The exhibition is Russia and the CIS region's largest professional exhibition event Security.

莫斯科国际安全及防火用品展成立于1995年，每年一届，是由著名的ITE展览公司主办；该展会属俄罗斯和独联体地区规模最大的安防专业展览盛会。

Moreover the synthetic inducing effect of mixed volatiles was more than the sum of individual volatiles.

从诱导酶活增加的效果来看，在这4种混合挥发物中，MeJA+cis-hexenal的诱导能力最高。

E. . The epoxidation of cis-allylic alcohols is difficult, and with 20％mol Ti 〓 and 30％mol tartrates, up to 80％e.

的对映选择性被得到；对难于环氧化的顺式烯丙基醇，使用20％mol四异丙氧基钛和30％mol酒石酸酯得到最高80％e.e。

TIS uses the basic mode for reference of CIS in management of corporation, and develops the theory to form the TIS that is made up of TMIS (Television Mind Identity System),TBIS (Television Behavior Identity System),TVIS (Television visual Identity System) and TAIS(Television Audio Identity System).

这一系统借鉴了企业形象识别系统的基本模式，并在此基础上进行了发展，建立了由电视理念识别系统、电视行为识别系统、电视视觉识别系统和电视听觉识别系统四个要素构成的形象战略系统，试图为电视媒体的形象建设实践提供有益的帮助。

The summary results are below:1. GUS expression under the driving of the BjCHI1 promoter (-1060/+17) was essentially undetectable in the young seedlings under normal growth conditions. GUS activity was first detected in the stigma of young flowers, peaked in the young siliques, and decreased when the siliques became older. No GUS expression was found in the mature siliques, seeds or root.2. The BjCHI1 promoter (-1060/+17) was inducible by NaCl, PEG, wounding and MeJA treatments. High levels of GUS expression were detected in the transgenic tobacco and Arabidopsis plants after wounding, NaCl, PEG, and MeJA treatment, indicating that the BjCHI1 promoter responses to both biotic and abiotic stresses.3. RT-PCR analysis confirmed that the expression of the BjCHI1 gene in B. juncea was inducible by PEG and NaCl.4. The transcription start site was determined by 5′-RACE, and was located at the 17th nucleotide upstream of the translation initiation codon of the BjCHI1 gene.5. A -805/+17 promoter fragment was enough to response to wounding and MeJA induction, which was proved in transgenic tobacco and Arabidopsis plants. The 397 bp region between -805 and -409 of the BjCHI1 promoter contains a cis-acting element that is essential for the wounding and MeJA inducibility.6. The -695/-620 region was necessary but not sufficient to confer MeJA-responsive expression. A T/G-box locates in -353 play an important role in the expression of the BjCHI1 gene in response to MeJA treatment. The 76 bp region is coupled with the T/G-box to confer full MeJA-inducible transcription of the BjCHI1 gene.

主要结果如下：1、利用转基因拟南芥植株分析表明，正常生长条件下，BjCHI1启动子(-1060/+17)驱动GUS基因主要在花柱中表达，幼嫩的荚也有表达，并随着果荚的成熟而减弱，成熟的果荚、种子和根没有显示GUS活性。2、BjCHI1启动子(-1060/+17)能驱动GUS基因在转基因烟草和拟南芥中响应伤害的诱导，转基因拟南芥的分析还证明BjCHI1启动子也受MeJA、NaCl和PEG的诱导，证明BjCHI1启动子是一个伤害、MeJA、NaCl和PEG等生物和非生物因素诱导启动子。3、RT-PCR进一步证明芥菜中BjCHI1基因也受NaCl和PEG的诱导表达。4、5′-RACE法鉴定了BjCHI1启动子的转录起始位点，位于翻译起始位点ATG上游第17个碱基A.5、转基因烟草和拟南芥分析证明，-805/+17的启动子片段足以响应伤害和MeJA的诱导，-805和-409之间397 bp的启动子片段含有对伤害和MeJA诱导必要的元件。6、本明烟叶片瞬时表达系统分析证明，一段76 bp的序列(-695/-620)对BjCHI1启动子响应MeJA的诱导是必要的，但不足以响应MeJA的诱导，位于-353的T/G-box也参与MeJA的诱导。76 bp的序列(-695/-620)与T/G-box协同起作用，赋予BjCHI1启动子MeJA诱导性。

The incorporation of selenocysteine needs a cis-acting element SECIS and four gene products: SelA, SelB, SelC and SelD.

研究表明硒代半胱氨酸的参入需要一个顺式作用元件SECIS和4个基因产物：SelA、SelB、SelC、SelD。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。