It was found that under short wave UV light II is easy to be photolyzed to reproduce its monomer trans-1-(4-biphenyl)-2-(4-pyridyl)ethene, and then the new formed E-I transforms to its cis-isomer through trans-cis isomerization. Finally, the equilibrium of isomerization establishes between E-I and Z-I.
研究发现，在短波紫外光照射下，II容易发生光解开环反应生成其反式单体E-I，随后新生成的EI经反顺异构化反应转变为其顺式异构体，最后反顺异构化反应达到平衡。
The results show that the most stable P5 is the doublet state of b isomer evolved from regular tetrahedron P4 while the most stable P(superscript + subscript 5) and P(superscript - subscript 5) are the singlet state of e, j isomers evolved from square P4, respectively.
结果表明，最稳定的P5为由正四面体的P4演变来的b结构的二重态，P(上标+下标 5)和P(上标-下标 5)则为由正方形P4演变来的e结构和j结构的单重态。
Phosphorus pentachloride was replaced by thionyl chloride and N, N-dimethyl formamide as chlorinating reagent in chlorination. The effect of reaction temperature and solvent on the yield of Z-isomer and E-isomer was investigated.
氯代时以用亚硫酰氯和N，N-二甲基甲酰胺的混合物代替五氯化磷作氯化剂，并考察了温度和溶剂对氯代产物中Z-异构体和E-异构体收率的影响。
In vitro studies with analogs related to ENMD-1420 showed that the Z isomer is more potent than the E isomer for antiproliferative activity.
与ENMD-1420相关的类似物体外研究显示在抗增殖活性方面Z异构体强于E异构体。
Results: The method was proved to be selective for separation of cefdinir, its by-products, degradation products and E - isomer.
结果：头孢地尼与其副产物、降解产物及E异构体分离良好。
RESULTS The method was proved to be selective for the separation of cefepime hydrochloride, its degradation products and E-isomer.
结果盐酸头孢吡肟与其中间体、降解产物及E异构体分离良好。
Objective: An HPLC method for determination of E-isomer as impurity in Toremifene Citrate was established.
目的：建立HPLC法测定枸橼酸托瑞米芬杂质E-异构体的含量。
The title compound used as an amino acetylating reagent was further reacted to yield Cefepime hydrochloric acid, the crystals obtained has white pale color and is stable to temperature, and has no E-isomer too.
用其作为氨基酰基化试剂进一步合成盐酸头孢吡肟，也得到基本上白色的对温度稳定的不含E-异构体的晶态化合物。
A sensitive and specific identification method of E isomer impurity in raw drug of Z cefepime dihydrochloride was established with high performance liquid chromatography/tandem-time of flight (HPLC/(Q-TOF)) mass spectrometry technology.
采用高效液相色谱/串联质谱技术建立了快速鉴定Z型盐酸头孢吡肟原料药中E型异构体杂质的新方法。
The reactivity of Z, E isomer was detected. Result The reaction can be carried out under room temperature in the best solvent CH_3CN with a 5~6 times of EMAO (volume ∶ mass).
结果反应可在室温下进行，CH3CN作溶剂最好，用量是EMAO的5～6倍（体积与质量比）；
Objective: To establish the UV Spectrophotometry method of the determination of Prostaglandins E 1 for Injection by the method of isomer alkali.
目的：采用碱异构化法对注射用前列腺素E1进行含量测定。
OBJECTIVE: To establish a sensitive method for the determination of roxithromycin (E Rox) and its active metabolite, (9Z) epimeric isomer (Z Rox).
目的：建立灵敏专一的分析方法，测定人尿样中的罗红霉素（E－Rox）及其活性代谢产物Z－Rox。
CONCLUSION This observation also suggests that E-isomer has a stronger ability to quench radical than Z-isomer did.
结论反式异构体淬灭羟自由基的能力比顺式异构体强。
The structure of the E-isomer of Cilastatin sodium was confirmed by HPLC, LC-MS and NOSEY etc.
西司他丁钠的E构型异构体经HPLC、LC-MS、NOSEY谱等确证其结构。
Synthesis of Cilastatin Sodium and Its E-isomer
西司他丁钠及其E构型异构体的合成
For C~6~9Si, both the heat of formation and the HOMO-LUMO plitting suggest that the isomer E, in which the silicon atom is located in the equator, is in the ground state.
在C~6~9Si各异构体中，取代位置在赤道的异构体具有最低的能量和最大的前沿轨道能级差，也是最稳定的异构体。
The bioassays showed that the inhabitation rate of the mixture of two isomers, Z isomer and E isomer were reached 95%, 100% and 97% against Sphaerotheca fuliginea at 50 mg/L.
结果表明，当处理剂量为50mg／L时，氯苯肟唑、Z-氯苯肟唑和E-氯苯肟唑的防效分别为95％、100％和97％，三者活性基本相当，故在实际中无须将两个异构体分离，混合体可直接应用。
The bioassays showed that the inhabitation rate of the mixture of two isomers, Z isomer and E isomer were reached 95%, 100% and 97% against Sphaerotheca fuliginea at 50 mg/L. The inhabitation rate of them was similar, so the mixture of the two isomers can be used without separation.
结果表明，当处理剂量为50 mg/L时，氯苯肟唑、Z-氯苯肟唑和E-氯苯肟唑的防效分别为95%、100%和97%，三者活性基本相当，故在实际中无须将两个异构体分离，混合体可直接应用。