二分子

The cis-decalin 79 was obtained from 2-methoxy-4-methylphenol (77) via a sequence of reactions involving intermolecular Diels-Alder reaction of masked o-benzoquinone derived from 77 and ethyl vinyl ketone, silyl enol ether formation and Cope rearrangement.

第一部份：以2-甲氧基-4-甲基酚(77)为起始物，经由二乙醯基亚碘苯氧化、分子间Diels-Alder反应、烯醇矽醚的形成及Cope重排反应得到具有十氢萘骨架化合物79。

Sarsolenone, a novel diterpenoid with [9. 3. 1] carbon skeleton, was isolated from the marine Sarcophyton solidum Tixier-Durivault in South China sea.

Sarsolenone是从我国南海软珊瑚(Sarcophyton solidum Tixier-Durivault)中分离出来的一种结构独特的二萜类化合物，分子基本骨架为[9.3.1]桥环双环结构。

So far, nsLTP was proposed to promote the spreading of systemic acquired resistance signal in arabidopsis, and induce the adhesion of the pollen tube to an artificial stylar matrix in vitro, suggesting a receptor-like molecule likely exists in the cell membranes.

三级结构主要由四个α-螺旋组成，四个α-螺旋由四对二硫键相连，形成一个能结合各种脂质分子的疏水性孔穴。

The electroluminescence devices (ITO/NPB/emitting layer /BCP/Mg : Ag) based on 1, 4-bis (4-N, N-methylamino styryl) naphthalene as emitting layer have been designed by the energy band matching principle.

以自制的&D-π-D&对称型有机绿色发光分子1，4-双（4'-N，N-二甲基氨基苯乙烯基）萘为发光层，在结构为ITO/NPB/BMABN/BCP/Mg： Ag的器件中，研究了空穴阻挡层厚度对器件发光性能的影响。

A high molecular weight polyisobutenyl succinimide dispersant with high nitrogen content and good thermal and oxidative stabilities was developed.

采用氯化烃化工艺和后偶联反应技术开发了一种氮含量高、热稳定性和氧化稳定性好的高相对分子质量的聚异丁烯基丁二酰亚胺分散剂。

Succinimide ; Density functional theory ; Ah initio method ; Molecular geometry ; Infrared spectrum ; Thermodynamic property

丁二酰亚胺；密度泛函理论；从头计算方法；分子几何构型；红外振动频率；热力学函数

In Chapter 2, the study on PET of the donor/acceptor pair via the rigid bridge, heptacyclo [6.6.0.02,6.03,13.04,11.05,9.010,14] tetradecane, is presented. By using the GMH method, the electronic coupling matrix elements between ground and excited states are predicted.

在第二章，我们研究了对七环十四烷连接儿茶酚和二氰基乙烯构建的分子内光诱导电子转移体系；考察了吸收光谱随溶剂极性变化的影响，预测了该体系的电子转移机理，并利用广义的Mulliken-Hush公式，计算了基态和各激发态之间的电子转移耦合矩阵元。

Objective To evaluate the effect of corneal topograph guided enhancement after photorefractive keratectomyin myopia.

目的：探讨在角膜地形图引导下的PRK术后二次准分子激光手术疗效。

Objective To evaluate the effect of corneal topograph guided enhancement after photorefractive keratectomyin myopia.

导读：探讨在角膜地形图引导下的PRK术后二次准分子激光手术疗效。

Based on the complexes Nd3 2H2O, the crystal of [Nd32] (HMPA = hexamethylphosphoric triamide) has been prepared and its structure has been unequivocally established by an X-ray crystallographic study.

结果显示稀土元素Nd位于配合物分子的中心，分别与六个硫原子和两个氧原子结合，组成了具有扭曲十二面体构型的配合物。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新