- 更多网络例句与外消旋性相关的网络例句 [注：此内容来源于网络，仅供参考]
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The direct incorporation of U-13C glucose was estimated by the intensity increase of m/z to F(F was parent fragment, and n was the carbon number in the fragment), while the total isotope incorporation from the added 13C could be calculated according to the abundance ratio increment summation from m/z (Fa+1) through (Fa was the fragment containing all original skeleton carbons, and T was the carbon number in the amino acid molecule). The 13C enrichment in the target compound was expressed as atom percentage excess, and that of D-amino acid needed to be corrected by the coefficient of hydrolysis-induced racemization. The 13C enrichment reflected the carbon turnover velocity of individual amino acid enantiomers, and was powerful to investigate the dynamics of soil amino acids.
外加葡萄糖直接合成氨基酸的比例可利用质谱碎片的相对强度变化来评价（n为质谱碎片F中含有的碳原子数目）；而源于葡萄糖的13C同位素在氨基酸分子中的富集程度是所有同位素峰相对强度变化的总和。13C在目标化合物中的富集比例用原子百分超评价，D氨－基酸的APE还需进一步利用水解诱导的外消旋化系数校正。13C在目标化合物中的富集程度可反映各氨基酸手性异构体的碳循环速率大小，是研究土壤氨基酸动态变化的有力工具。
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The kinetic resolution of raceme is one of the important ways in the synthesis of chiral compounds.
外消旋体的动力学拆分反应是制备手性化合物的重要方法之一。
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In this thesis, a totally new type of chiral heteropolyanion, [Sb_5_(10)Mo_5O_(26)]~(7-), has been isolated as racemic compound 1. The racemate was further resolved into enantiomerically pure crystals L-2 and R-2 by addition of organic units.
本文我们得到了一个由新的手性多阴离子[Sb_5_(10)Mo_5O_(26)]~(7-)构筑的外消旋体1，通过向外消旋体1的溶液中加入有机基团，实现了对外消旋体1的拆分得到了纯旋光活性化合物2，即L-2和R-2。
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The effects of racemate initial concentration, volume ratio of surfactant to organic solvent, pH value in internal or external phase, pH gradient from external to internal phase, ligand metallicion and system temperature on the performances of chiral separation were discussed.
摘 要：研究在含有Cu2+和N-n-十二烷基-L-脯氨酸手性配体的乳状液膜体系中手性萃取分离氧氟沙星对映体的效果，以及外消旋体的初始浓度、表面活性剂与有机溶剂的体积配比、内外水相pH值、从外水相到内水相pH值梯度变化以及配位金属离子与体系温度对液膜手性分离性能的影响。
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Chiral aminoalcohol is an important kind of chiral substance in the asymmetric synthesis, meanwhile, it is widely used in the field of medicine synthesis and the resolution of raceme.
手性氨基醇在不对称合成领域中是一类重要的手性源，同时，手性氨基醇在药物合成、外消旋体拆分等领域也具有广泛的用途。
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To an asymmetric synthesis of (1), we applied a type of Roush addition in the first step to introduce the C4 stereocenter, and then the chair substance -122 are readily transformed into the title compound -aphanorphine using the same route as to the racemic target molecular.
aphanorphine分子的不对称合成是在第一步通过对甲氧基苯乙醛（119）发生Roush反应引入手性，得到手性高烯丙醇-122，然后利用与合成外消旋目标分子相同的方法，光学纯化合物-122经一系列转化可得到光学纯中间体化合物139；化合物139发生分子内傅—克反应的过程中，由C4位手性立体特异地控制C1位手性的生成，从而解决-aphanorphine分子中的手性问题。
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This requirement may be satisfied by the submission of information such as the following: name (generic name, chemical name, code number ); Chemical Abstracts Service number if available; description (e.g., appearance, color, physical state ); molecular formula and molecular weight; structural formula (including ionic state if applicable ); stereochemistry identifying chiral centers, cis-trans isomerism, etc.
有的话、描述（如：外观、颜色、物理状态）、分子式和分子重量、结构式、立体化学（找出手性中心、顺式贯穿异性等）、对映结构体或固态形式比率（如：外消旋物、规定的异构体、对映异构物和固态形式的混合物）、溶解性档案、分隔系数、溶液pH值、解离常数、熔点和沸点、拆射率、精确重力。
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Separation of racemic mixtures of thirty-eight secondary aromatic alcohols and arylethanediols with different substituting group was achieved with HPLC by using Chiralcel OD and Chiralcel LJ as chiral stationary phase and hexane/2-propanol mixtures of different ratios as eluents. The chromatographic parameters of these racemates on OD and OJ columns were examined.
在ChiralcelOD和ChiralcelOJ两支多糖类手性固定相上，以各种不同配比的正己烷-异丙醇为洗脱剂对38种带有不同取代基的芳香仲醇及芳香乙二醇类手性化合物的对映体进行拆分，考察了这些外消旋体在这两支手性柱上的色谱行为。
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The hydrogen bonding and π-π interactions between the chiral stationary phase and the polar group of racemates may be responsible for the chiral recognition.
手性固定相与外消旋样品上的极性基团之间的氢键作用和π-π作用可能是进行手性识别的主要原因。
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Some compounds possessing chiral center themselves may be racemates and appear racemic phenomenon in the extraction and separation from medicine herbs, structure modification and chemical synthesis.
但是，由于含有手性中心的中药有效成分本身可能是消旋体、或者在分离提取、结构改造及化学合成时会出现外消旋化现象，使新药研制与开发中面临对映体成分的分离制备、体内手性药物分析及对映体特异性药代动力学研究等重大难题。
- 更多网络解释与外消旋性相关的网络解释 [注：此内容来源于网络，仅供参考]
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raceme：外消旋体
外消旋体(raceme) 一种具有旋光性(见旋光异构)的手性分子(见手征性)与其对映体的等摩尔混合物. 它由旋光方向相反、旋光能力相同的分子等量混合而成,其旋光性因这些分子间的作用而相互抵消,因而是不旋光的. 外消旋体常用D,L-标记,
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racemism：外消旋性
racemic modification 外消旋体 | racemism 外消旋性 | racemization 外消旋
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racemism：<外>消旋性;<外>消旋现象
racemic modificaion 消旋变体;消修饰体 | racemism 消旋性;消旋现象 | racemization 消旋化
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chiral drug：手性药物
后来研究发现,反应停是一种手性药物,手性药物(chiral drug)是指其分子立体结构和它的镜像彼此不能够重合,将互为镜像关系而又不能重合的一对药物结构称为对映体(enantiomer),对映体各有不同的旋光方向:左旋、右旋、外消旋,
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racemic mixture：外消旋混合物
此外,还有内消旋体(racemize)和外消旋体(mesomeride),一个混合了相同份量的一对(两种)光学异构体被称为外消旋混合物(racemic mixture),外消旋混合物是没有折光性的(甚至当两种异构体被分开来,两部分都仍旧没有折光性因为外消旋体的光学异构体可以相互转化,
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racemic modification：外消旋体
racemic mixture 外消旋混合物 | racemic modification 外消旋体 | racemism 外消旋性
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racemiform：总状花序形的
racemiferous 有串状花的 | racemiform 总状花序形的 | racemism 外消旋性