结构体

For the production of reactive polyurethane cross-linkinger and curing agents,2,4-diisocyanate toluene terpolymer,which possesses the rigid structures of hexatomic ring and three reactive functional groups,was synthesized and characterized by the Fourier transform infrared,the gel permeation chromatography and the chemical analysis methods.

结果表明采用Cat-3作催化剂，在(60±2)℃下反应，可制得分子量为530~550，Mw/Mn=1.10，NCO质量分数为(25.0±0.5)%窄分子量分布的TDI三聚体；随着反应时间延长，TDI会进一步多元聚合生成多聚结构；而加入质量分数为0.4%的苯甲酰氯作为稳定剂，可有效抑制多元聚合的发生，所制备的TDI三聚体稳定性可在半年以上

On the basis of induced fibrillation theory, a mathematical model is developed to conduct a computer two-dimensional simulation under the consideration of short range repel and hydrokinetic obstruction.

在场致纤维理论基础上，考察短距离排斥力和流体动力学阻力，建立了基本模型，并对电流变效应进行二维计算机仿真分析；以库仑定律为理论基础，对电流变效应进行了三维计算机仿真分析；详细讨论了电流变体结构参数及外加电场对电流变体场致成链状况的影响。

For thecrystal in MeOH, X-ray single-crystal analysis reveals that each Schiff base provideone iminic N, one phenolic O and one hydroxylic O to chelate the four Cu andthus resulted in a pseudo-cubane structure. Different from the crystal obtained inMeOH, each Cu are tetra-coordinated not penta-coordinated.

充分证明了所设计的Schiff碱配体是一种桥联配体，不仅在配位形式上有多样性，而且在晶体排列方面也应具有多样性，是构建具有新颖物化性质及结构的超分子聚集体的良好前体。

A systematic convergence tests for hyperspherical potential curves, channel functions, are performed to assess the validity and efficiency. The challenging three-body problem with complex channel-coupling is solved efficiently and accurately. Accurate ground-state energy, structure parameters, and rotantion constants for Ar2Kr and Ar3 are obtained and compared to other theoretical values in the literatures.

系统研究了超球势曲线、道函数的特征与收敛性；实现了有复杂多通道耦合时重惰性原子三聚体的精确求解，得到了Ar2Kr和Ar3惰性原子三聚体精确的基态能量、结构参数及转动常数，并与文献结果进行了比较。

It is for the first time found that the liquid hypoeutectic Al-Fe alloy has a critical temperature of 920℃ in the curve of the cluster size to temperature. Below 920℃ the structural change is predominantly in the medium-range order, while in the short-range order above 920℃.

首次发现，亚共晶Al-Fe合金熔体的原子团簇尺寸等在920℃左右存在明显的变化。920℃以下熔体结构的变化以原子团簇尺寸即中程尺度参数的变化为主，而920℃以上则以配位数等短程序参数的变化为主。

Using Gassian98 with LANL2DZ basis sets, the quantum chemistry calculation of the model was performed.4. A series of ligands which all include imidazolyl group were designed and synthesized. The crystal structure of one of them was determined by X-ray diffraction.

设计并合成了一系列含有咪唑基的配体，应用X-射线衍射方法测定了其中一种配体的晶体结构，并用Gaussian98程序包进行了量子化学计算。

The test results show that the contact fatigued microstructure characters mainly the reduction of pearlitic interlamellar spacing, the formation of different type of substructures as well as the deformation and fracture of cementitic lamellar in pearlite.

结果表明，PD3钢轨钢接触疲劳变形组织的主要特征是：珠光体片层间距的减小；不同类型亚结构的形成；渗碳体的变形与断裂。

Reaction of α,α,α,α-tetra (o-aminophenyl) porphyrin with isonicotinic acid yields the ligand 1b bearing two coordination sites whose structure has been verified by IR、UV-Vis、〓H NMR and MS spectra.

以α，α，α，α-四卟啉为母体，经过与异烟酸缩合反应得到具有两个配位位置的配体1b，配体的结构经过IR、UV-Vis、〓H NMR、MS验证。

After HRP application, HRP labelled cells were distributed in the nucleus of trapezoid body , lateroventral periolivary nucleus , retrotrapezoid nucleus , lateral paragigantocellular nucleus and lateral reticular nucleus . The findings demonstrated the existence of neural structural relations between the chemosensitve areas and the Tz, LVPO, NRT, LPGi and LRt, and revealed that these nuclei might participate in the mechanism of central chemical regulation on respiration.

观察到用浸有HRP的滤纸局部敷贴于延髓腹外侧表面化学感受区后，在延髓斜方体核、外周橄榄腹外侧核、斜方体后核、巨细胞旁外侧核和外侧网状核等核团找到HRP标记的细胞，表明上述延髓内部核团与腹外侧表面化学感受区之间存在神经结构联系，提示延髓腹外侧表面化学感受区对H〓等物质的化学感受机制可能与上述核团神经元伸向该区的突起有关。

VPO catalyst precursor is prepared by adding sodium laurate,oleic acid,stearic acid and Tween 60 to study the effect of biosurface- active materials on the structure and properties of VPO catalyst precursor.

为了探讨生物表面活性物质对VPO催化剂前驱体结构和性能的影响，制备了月桂酸钠、油酸、硬脂酸和吐温60四种物质存在下的VPO 催化剂前驱体。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。