对映体过量,enantiomeric excess
1)enantiomeric excess对映体过量
1.The data indicated thatenantiomeric excess of isophorone oxide was able to be caused by the external centrifugal .结果表明离心力场能够诱导产物的对映体过量,在顺时针和逆时针旋转力场中得到的产物CD230信号相反并随转速的增大而增大。
2.In this paper, a method using one time injection to determineenantiomeric excess and conversion of the stereoselective esterification of racemic ibuprofen with n butanol catalyzed by lipase was developed with a commercially available HPLC CSP column Regis(S, S) Whelk 01.以脂肪酶在正己烷中催化消旋布洛芬与正丁醇的立体选择性酯化反应为例，研究了用手性ＨＰＬＣ法进行分析时产物及底物的峰面积变化与转化率的关系，确定了布洛芬丁酯与未反应布洛芬的峰面积－浓度响应因子的比值，从而可通过一次进样用峰面积直接测定布洛芬的转化率和对映体过量。
3.The quantitative relationship betweenenantiomeric excess of substract ee (S) and conversion c for the enzymatic irreversible kinetic resolution has been derived and verified experimently.本文从理论上讨论了酶催化不可逆动力学拆分反应中底物的对映体过量ee(S)与转化率c的定量关系式并通过实验数据对以上关系式进行了验证。
英文短句/例句
1.Theory and Applications of Kinetic Method for Chiral Recognition and Enantiomeric Excess Measurement质谱动力学方法在手性识别及对映体过量值方面的原理及应用
2.an inappropriate and excessive reaction to an allergen (as pollen or dust or animal hair or certain foods); severity ranges from mild allergy to severe systemic reactions leading to anaphylactic shock.对变态反映元过度反映。
3.Study of Chiral Separation of Tryptophan Enantiomers and Process Simulation;色氨酸对映体的手性拆分及过程模拟
4.Synthesis of a New Cyclodextrin Derivative and Its Application as CGC Chiral Stationary Phase in Determination of Enantiomeric Excess一种新的环糊精衍生物手性固定相的合成及其在对映异构体过量值测定中的应用
5.Separation and Quantitation of Theanine Enantiomer by High Performance Liquid Chromatography;茶氨酸对映体的高效液相色谱拆分与定量
6.NP-HPLC Separation and Determination of Amlodipine EnantiomersNP-HPLC分离氨氯地平对映体及其含量测定
7.OBJECTIVE: To study chiral pharmacokinetics process of amlodipine enantiomers of rabbits in vivo.目的:研究氨氯地平对映体在家兔体内的手性药动学过程。
8.It analyses the production, development of effective information and their converging procedure.有效信息的整合与内化是认知主体对客体的能动的反映过程。
9." Racemate: Mixture of equal quantities of two enantiomers, substances whose molecular structures are mirror images of one another."外消旋体: 两种分子结构互为镜像的对映体的等量混合物。
10.Chiral separation of cidofovir by reversed-phase high performance liquid chromatography西多福韦对映体的拆分及异构体含量分析方法研究
11.Abstract: Good order parameter can reflect the symmetry changes perfectly during phase transition.文摘:好的序参量能很好地反映相变过程中对称性的变化。
12.Too much alcohol is bad for the system.过量的酒对身体有害。
13.The enantiomer that rotates the plane to the right is referred to as the dextrorotatory.使平面向右旋转的对映体，称为右旋对映体。
14.Determination of venlafaxine and it′s enantiomers in rat brain by HPLCHPLC法测定大鼠脑组织中文拉法辛及其对映体的含量
15.The presence of wolves has meant that much more meat is available on the ground.各路食腐动物从灰熊到鹊鸟等，都依赖这些尸体过活，各物种的数量增加，反映著这笔新的财富。
16.The neutron log is primarily resposive to the amount of hydrogen in the formation.中子测井对岩层的氢含量有显著反映。
17.Semantic Information Integration and Ontoloty Mapping Process Based on Ontology;基于本体的语义信息集成及本体映射过程
18.The film is run through a projector.影片通过放映机放映。
相关短句/例句
enantiomer excess对映体过量
3)enantiomeric excess对映体过量值
1.Theenantiomeric excess was calculated by the peak area of the diastereoisomers.利用Ｒ－（＋）－苯乙基异氰酸酯与外消旋２－辛醇反应，产生相应的异氰酸酯非对映体 衍生物，在气相色谱上得到分离，根据色谱图中两异构体峰面积差值，计算出对映体过量值， 且与利用旋光仪测得的旋光纯度比较，结果相一致。
2.Theenantiomeric excess(e.得到的N-苯乙酰-(R)-BPA的对映体过量值(e。
3.The ratio of the two competitive dissociation rates was related to the absolute configuration of the chiral analyte,and that was the basis for both chiral recognition andenantiomeric excess measurement.近年来电喷雾质谱被越来越多地应用于手性分析研究中,本工作综述了质谱中的动力学方法在手性识别和对映体过量值测量中的应用,并对该方法在这些主要应用中存在的关键问题进行讨论。
4)diastereomeric excess非对映体过量
5)enantiomeric excess对映体过量百分率
6)enantioselectivty对映异构体过量率
延伸阅读
对映体过量分子式：CAS号：性质：通常用％e. e.表示。系指两种对映关系的异构体R和S的百分含量之差。对映体过量百分率(％e. e.)=100％=R%-S%。式中，[R]为主要对映体产物的量，[S]为次要对映体产物的量。例如，R和S两对映体重量分别为60和40，则该化合物的对映体过量为20％。
