6-s-cis ？ 6-s-trans？ - 实验交流 - 生物秀
标题: 6-s-cis ？ 6-s-trans？
摘要: [6-s-cis ？ 6-s-trans？] As mentioned above, 1,25-dihydroxyvitamin D3 is a very flexiblecompound capable of a rotation around its 6–7 carbon bond
Therefore the compound can achieve all possible shapes extending from 6-s-cis
关键词:[]……
As mentioned above, 1,25-dihydroxyvitamin D3 is a very flexiblecompound capable of a rotation around its 6–7 carbon bond .Therefore the compound can achieve all possible shapes extending from 6-s-cis to 6-s-trans position. A series of analogs locked in either 6-s-cis or 6-s-transposition was synthesized in the laboratory of Norman et al.有谁能告诉我这段话里的6-s-cis 和6-s-trans 是什么意思吗？是基团？谢谢赐教了！！
在6位上由于碳链旋转，形成的两个顺式、反式异构体。
6-s-cis locked analogs这个是什么意思呢？谢谢了！！！是没有旋光性？
相关热词：
生物秀是目前国内最具影响力的生物医药门户网站之一，致力于IT技术和BT的跨界融合以及生物医药领域前沿技术和成功商业模式的传播。为生物医药领域研究人员和企业提供最具价值的行业资讯、专业技术、学术交流平台、会议会展、电子商务和求职招聘等一站式服务。
官方微信号：shengwuxiu
电话：021-s-cis-s-trans conformation的用法和样例：
The Tm and Ti of compounds 18 is higher than the compounds 16.The Tm and Tj of compounds 18 II and 16 II which have the trans conformation is higher than those of compounds 18 I and 16 I having cis conformation.
化合物 16和 18中，反式构型的化合物 16II和 ISll的熔点和液晶态的清亮点均高于顺式构型的化合物 161和 ISI。
It is concluded that the polymethylene is in full extended trans conformation both in the crystalline and in the liquid crystalline phases when the spacer units are longer than 8.
结果表明,芳香共聚酯热致性液晶中液晶基元之间的相互作用很强而柔性间隔链之间的相互作用很弱。柔性间隔链段主要是伸直的反式构象。
To detect the glutathione S－trans ferase(GST) activity in the fluid of the larvae of Taenia solium(Cysticercus c ellulosae).
目的：探讨猪带绦虫囊尾蚴囊液内谷胱甘肽S转换酶(gst)的活性。
THE ELECTRONIC STRUCTURES AND BIOLOGICAL? ACTIVITIES OF METHOMYL'S CIS? ?AND TRANS?ISOMERS
灭多威顺、反异构体的电子结构和生物活性
Keywords Ppoly-proline type II;su
脯氨酸;肽键;反式构象;顺式构象;多聚脯氨酸II型;同义密码子;神经网络;支持向量机;隐马尔可夫模型;模拟退火;
An Analysis of the Mitigating Effect of Russia's "Soft Power" on the CIS'S Centrifugal Tendency
浅析俄罗斯“软实力”对独联体国家离心力的缓解作用
s-cis-s-trans conformation的海词问答与网友补充：
s-cis-s-trans conformation的相关资料：
相关词典网站：&&&trans cis
的翻译结果:
查询用时：0.148秒
&在分类学科中查询
Synthesis of
cis,trans,cis 1,2,3,4Cyclobutanetetracarboxylic Dianhydride
顺,反,顺-1,2,3,4-环丁烷四甲酸二酐的合成研究
The crystal structure of 2a was determined. The double function of 2a,
isomerization of the azo group, and the torsion angle between the benzene and the coumarin ring suggested that azocoumarins might be uesful as efficient molecular devices.
同时用X射线单晶衍射测定了化合物 2a的晶体结构 ,其特殊的双功能分子键连、偶氮基的顺反异构和苯环与香豆素环平面间的扭转夹角 ,使之可能成为有效的分子器件材料
E-4,5-Disubstituted-2-Pyrrolichinones was synthesized under phase transfer catalysis,trans:cis was 97:3,The yield of the product was 74%,Structures of product was confirmed by
1 HNMR and MS.
采用PTC法合成了E - 4,5 -二取代苯基 - 2 -吡咯烷酮 ,反式异构体与顺式异构体之比为 97∶3,产率高达 74% ,其结构用1HNMR和MS表征。
Disubstituted
Pyrrolichinones was highly stereoselective synthesized under phase transfer catalysis, trans:cis was 97:3; the yield of the product was 74%; structures of product was confirmed by HNMR and MS.
采用PTC法高立体选择性合成了E 4.5
吡咯烷酮 ,反式异构体与顺式异构体之比为 97∶3,产率高达 74% ,其结构用1HNMR和MS表征 .
Lipoxygenase (LOX) contains a nonheme iron in it’s catalytic center. It can catalyze the oxidation of polyunsaturated fatty acids containing the cis,cis-1,4-pentadiene moiety to the corresponding hydroperoxides (HPOD) of conjugated (trans, cis)-dienes, which are important intermediates of synthesizing drugs and chemicals.
脂肪氧合酶(LOX)的结构中含有非血红素铁,能专一催化具有cis,cis-1,4-戊二烯结构的多元不饱和脂肪酸加氧形成具有共轭双键的脂肪酸氢过氧化物(HPOD)。
Lipoxygenase (LOX) contains a nonheme iron in its catalytic center. It can catalyze the oxidation of polyunsaturated fatty acids containing cis,cis-1,4-pentadiene moiety to the corresponding hydroperoxides (HPOD) of conjugated (trans, cis)-dienes, which are important intermediates for synthesizing drugs and chemicals.
脂氧酶(LOX)的结构中含有非血红素铁,能专一催化具有cis,cis-1,4-戊二烯结构的多元不饱和脂肪酸加氧形成具有共轭双键的脂肪酸氢过氧化物(HPOD)。
From 1982 to 1984 for monitoring a sexual lure reagent for this specie (trans, cis) -3, 13 octadecadienol was used during the emerging stage. It is possible to predict, in Beijing district, that the initial stage of emergence is in first ten days of May, to the middle of December. This stage is prolonged for 5 months.
年采用白杨透翅蛾性引诱剂反3、顺13-十八碳二烯醇对成虫发生期进行监测,可准确地预测成虫发生期在北京地区5月上旬为成虫羽化初期,直至10月中旬结束,历期可长达5个月之久,并测到有第二代成虫的出现。
CIS-TRANS PHOTOISOMERIZATION OF OCIMENE
罗勒烯的光化学顺反异构化反应
The cis-trans configuration of the compounds was analysed.
对化合物的顺反构型作了分析。
查询“trans cis”译词为用户自定义的双语例句&&&&我想查看译文中含有：的双语例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法，我们为您准备了出自英文原文的大量英语例句，供您参考。&&&&&&&&&&&& Azoxybisbenzo-15-crown-5 was synthesized.Photoinduced trans-cis iso-merization as well as its ability to extract alkali metals and rare earth metals' were dis-cussed. 合成了一种新的双冠醚,氧化偶氮双苯并15-冠-5。初步探讨了它的光异构现象及其对稀土和碱金属离子的萃取能力。 The catalysis of trans-cis isomerizationof trans-diaquobis (oxalato) -chromate(Ⅲ) byCoSO_4 was investigated at ionic strength 1.5mol·L~(-1), pH 3 and 25, 35 and 45℃, respe-ctively.Linear behavior is observed betweenthe rate and the concentration of Co~(2+) ionuntil ca. 0. 15 mol·L~(-1), after the ratebecomes much faster. If no CoSO_4 ion pair catalysis exists,the rate constant of isomerization k_(obs) willhave the formk_(obs)=k_(H_2O)+k_(Na~+)[Na~+] + k_(H~+) [H~+] ++ k_(Co~(2+)[Co~(2+)]= k_1+... The catalysis of trans-cis isomerizationof trans-diaquobis (oxalato) -chromate(Ⅲ) byCoSO_4 was investigated at ionic strength 1.5mol·L~(-1), pH 3 and 25, 35 and 45℃, respe-ctively.Linear behavior is observed betweenthe rate and the concentration of Co~(2+) ionuntil ca. 0. 15 mol·L~(-1), after the ratebecomes much faster. If no CoSO_4 ion pair catalysis exists,the rate constant of isomerization k_(obs) willhave the formk_(obs)=k_(H_2O)+k_(Na~+)[Na~+] + k_(H~+) [H~+] ++ k_(Co~(2+)[Co~(2+)]= k_1+ k_(Co~(2+)[Co~(2+)]and a linear relation between(k_(obs)- k_1)and[Co~(2+)] should be observed over the entirerange of Co~(2+) ion concentration. Failure ofthis observation indicates that a term k_(CoSO_4)[CoSO_4] should be added to the k_(obs)equation, thus the following equation shouldhold(k_(ObS)-k_1)/ [Co~(2+)] = k_(Co~(2+) + k_(CoSO_4)k_(AI) [SO_4~(2-)]in which k_(IA) stands for the constant of ionassociation of CoSO_4. By our experimentaldata,a plot of (k_(obs)-k_1/ [Co~(2+)] vs. [SO_4~(2-)]is indeed linear except for the highest[SO_4~(2-)]values where large errors arisebecause of small values of (k_(obs)-k_1) and[Co~(2+)]. From the intercept and slope ofthe line, the catalytic rate constants can becalculated. The catalytic rate constants thus obtainedat 25℃ are k_(Co~(2+))=2.13×10~(-2) (mol·L~(-1)·s)~(-1),k_(CoSO_4)=5.77×10~(-3) (mol·L~(-1)·s)~(-1) and theactivation paramaters obtained for Co~(2+) andCoSO_4 are ΔS≠=-26.4 and -96, 2 J·K~(-1).mol~(-1), ΔH≠= 74. 9 and 56. 9 kJ·mol~(-l), ΔE≠_(293)=77.4 and 59.0 kJ mol~(-1), respectively,from which the ring-opening mechanism ofthe reaction is reconfirmed.用硫酸钴催化反式-二水·二草酸根络铬(Ⅲ)的顺反异构化反应,当离子强度为1.5mol·L~(-1)、pH为3及温度分别为25、35和45℃时,发现Co~(2+)浓度不大时和反应速度成直线关系。Co~(2+)浓度大于0.15mol·L~(-1)时,25℃的反应速度大于直线关系。表明Co~(2+)和CoSO_4离子对,同时具有催化作用。测得25℃时k_(Co~(2+))=2.13×10~(-2)(mol·L~(-1)·s)~(-1),k_(CoSO_4)=5.77×10~(-3)(mol·L~(-1)·s)~(-1),并测得Co~(2+)和COSO_4的活化参数分别为 △S?=-26.4和-96.2J·K~(-1)·mol~(-1),△H?=74.9和 56.9kJ·mol~(-1)。△E?_(298)=77.4和59.4kJ·mol~(-1)。根据活化参数推论该反应为开环机理。 In this paper,the polyphenylacetylene(PPA)is synthesised by the poly-merization of phenylacetylene with two kinds of catalysts,anhydsous AlCl_3and(Ph_3P)_2PdCl_2.Using anhydrous AlCl_3 as catalyst,the cis-trans PPA isobtained.And using(Ph_3P)_2PdCl_2,the trans-cis PPA is found.Therefore,thepolymerization of phenylacetylene may follow complex catalysis mechanismwhen anhydrous AlCl_3 is used as a catalyst and it may follow metathesiscatalysis mechanism when(Ph_3P)_2PdCl_2 is used. 本文用无水AlCl_3和(Ph_3P)_2PdCl_2二种催化剂催化苯乙炔聚合,得到共轭聚合物聚苯乙炔(PPA)。对PPA 的微结构分析表明:用无水AlCl_3催化苯乙炔,得到顺-反式PPA;用(Ph_3P)_2PdCl_2催化苯乙炔得到反-顺式PPA.因此,作者认为用无水AlCl_3催化苯乙炔聚合时可能按络合催化机理反应;用(Ph_3P)_2PdCl_2催化苯乙炔聚合时可能按易位催化机理反应。&nbsp&&&&&相关查询
在英文学术搜索中查有关的内容
在知识搜索中查有关的内容
在数字搜索中查有关的内容
在概念知识元中查有关的内容
在学术趋势中查有关的内容
2008 CNKI－中国知网
北京市公安局海淀分局 备案号：110 1081725
&2008中国知网(cnki)
中国学术期刊(光盘版)电子杂志社 上传我的文档
 下载
 收藏
该文档贡献者很忙，什么也没留下。
 下载此文档
正在努力加载中...
6-s-cis-11-sicis
下载积分：300
内容提示：6-s-cis-11-sicis
文档格式：PDF|
浏览次数：4|
上传日期： 13:57:35|
文档星级：
该用户还上传了这些文档
6-s-cis-11-sicis
官方公共微信