查询词典 elasticity of substitution

The results of genetic analysis, such as GC content, transition/transversion rate ratios, synonymous substitution rates, indicated that the br fragments with high level of genetic divergence are faced with both purifying selection and bias mutation pressure.

随后的遗传分析，包括GC含量、转换与颠换的比率、同义突变率分析，表明br基因间具有较高的遗传分歧程度，并面临着净化选择和偏倚突变压的双重抑制。

The substitution of a purine for a pyrimidine, or vice versa is a transversion

嘌呤为嘧啶取代或嘧啶为嘌呤所取代，叫做颠换。收藏反馈

3,6-Bis(1 H -1,2,3,4-tetrazol-5-yl-amino)-1,2,4,5-tetrazine was synthesized by triamino- guanidinium nitrate with 2,4-pentanedione of condensation, followed by oxidation and substitution reaction. The product was characterized by elemental analysis, IR, NMR and DSC.

以三氨基胍硝酸盐、戊二酮为起始原料，经缩合、氧化、取代等反应合成了3，6-双(1 H -1，2，3，4-四唑-5-氨基)-1，2，4，5-四嗪，并通过元素分析、红外、核磁、差示扫描量热法等分析手段对其进行了表征。

Two analogues of Trichosanthes trypsin inhibitor I with the Cys14- Cys26 or Cys8- Cys20 disulfide bonds replaced by Tys or Phe and two negative control analogues substitution serine for cysteine at 14 and 26 or 8 and 20 positions were synthesized, respectively. The C14F-C26Y mutant had 1/140 inhibitory activity of native Trichosanthes trypsin inhibitor I to trypsin.

第二章是对天花粉胰蛋白酶抑制剂的两对二硫键的作用进行了研究，二硫键在蛋白质的折叠和功能中有重要的作用，芳香族氨基酸的芳环之间形成π-π共轭能否部分补偿二硫键的作用？

Methods 2-(piperazin-1-yl)-1-(pyrrolidin-1-yl)ethanone (2) was synthesized from pyrrolidine via amidation and substitution, followed by treating with chloroacetyl chloride and triphenylphosphine in a "one pot" manner to give the corresponding phosphonium chloride 3 in a stable and pure form after crystallization from isopropanol.

以四氢吡咯为原料，先与氯乙酰氯成酰胺，再与哌嗪发生取代反应制得中间体［（1-四氢吡咯基）甲基］哌嗪(2)；化合物2与氯乙酰氯和三苯基膦反应，经异丙醇重结晶得到稳定的有机鏻盐(3)；化合物3与3，4，5-三甲氧基苯甲醛发生Wittig反应，再与马来酸成盐得目标化合物马来酸桂哌齐特(1)。

A linear de brushless motor considered in this paper is troubleproof because of substitution of semi-conductor switches for the brushes and commutators.

一在这纸中考虑线的从不刷的马达(LDM由于为刷子和交换者半导体转辙器的代用是无烦恼的。

An error in substitution is a technical foul and shall be charged to the team coach as an unsportsmanlike conduct by himself.

替补出现错误，视做教练本身违反体育精神的行为，而判予一次技术犯规。

The present invention relates to a water-soluble associative cellulose ether having a DP viscosity from 250 to 20,000 mPa's, measured at a concentration of 1 % by weight, and a molecular substitution, MS, from 0.0001 to 0.005 of a hydrophobic substituent containing an unsubstituted or substituted hydrocarbon group of 8-24 carbon atoms.

本发明涉及一种水溶性缔合纤维素醚，其在1重量％的浓度下测量的DP粘度为250-20，000mPa's，并且含有未取代或取代的C8-C24烃基的疏水取代基的分子取代度MS为

Another prevalent idea in magic is that of substitution: the person or thing to be affected by the spell is replaced by his image, or, like the "ushabtiu" figures in Egyptian tombs, images replace the protective powers invoked, or lastly some part hair, nailparings, garments, etc.

另一种流行的观点是，魔术替代：人或事物受到拼写所取代他的形象，或如& ushabtiu &的数字在埃及墓穴，图像取代援引保护的权力，或最后部分（头发， nailparings ，服装等）代替整个人。

The correlation between the vibronic spectrum of Eu〓 and the site substitution of other co-doped ions was first studied, and many useful data can be derived from the vibronic spectrum.

首次研究了Eu〓振动光谱与其它掺杂离子格位取代的关系，发现从振动光谱的研究可以获得许多有用的信息。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48