查询词典 water structure

The Diels-Alder cycloadditions of [60] fullerene for preparation of optical limitingmaterials are discussed in chapter 3 and 6. Soluble cycloaddition derivatives of 〓aresynthesized by the reaction of 〓 with indene,1,1'-biindene andcyclopentadiene derivatives.〓Particular, the Diels-Alder cycloaddition of 〓 with1,1'-biindene under controlled conditions affords the stable monoadduct 〓〓of novel structure, which was confirmed by HPLC, FTIR, FD-MS,〓NMR,〓 NMR, HMQC and HMBC spectra, Its two bridgehead cage carbons resonate at70.91ppm, The 〓 NMR spectra showed 38 lines consistent with the 〓 symmetryassociated with [6,6] addition. The 〓 shows similar optical limitingproperties to that of 〓 in toluene for 8ns laser at wave length 532nm. Moreover, thehigh solubility of this adduct in polar solvents such as THF, acetone enables itsincorporation into sol-gel glass matrix. The thin films prepared via the sol-gel methodshow improved OL behaviour compared to those of 〓. The langmuir-Blodgett filmformation and uv-visible absorption of 〓 are also investigated. LBmonolayer of this compound is prepared on the air-water interface at 〓 mol/l. In chapter 4, three water-soluble derivatives of [60] fullerene: fullerol(1), theaddition product (2)of fullerol (1)with polyvinylpyrrolidone and fumaric acidderivative of 〓(3) are synthesized and characterized.

通过Diels-Alder环加成反应，用茚〓和1，1'-联茚〓及取代茂合成了一系列可溶性的〓环加成衍生物，发现可控制反应条件，使1，1'-联茚与〓反应，并高产率地得到具有新颖结构的单加成物，用HPLC、FTIR、FD-MS 及〓、HMQC、HMBC等多种波谱技术对其结构进行表征，测得它的两个〓杂化的桥头碳的化学位移为〓ppm，证明生成的衍生物为6∶6闭式环加成，〓NMR谱中共给出38个信号，表明〓联茚衍生物分子具有〓对称性；在波长532nm，脉冲宽度8ns的激光下，〓联茚衍生物的甲苯溶液的光限幅性能与〓的甲苯溶液相近，由于〓联茚单加成衍生物熱稳定性好，在四氢呋喃，丙酮等极性溶剂中溶解性好，能分别均匀地掺入溶胶-凝胶中，已发现它的溶胶(so1)光限幅性能优于纯〓的光限幅性能；使用Langmuir-Blodgett技术将〓联茚衍生物在空气和水的界面进行了LB单层膜和多层膜实验以及UV-Vis吸收谱研究，通过等温压缩曲线测试，证明浓度为〓〓时，〓联茚衍生物能够形成单层膜。

Comparing with water, the optimal heat transfer enhancement is achieved near the critical micelle concentrations of surfactants. The degree of heat transfer enhancement is different with different surfactants and is influenced by solubility characteristic, ionic nature and chemical structure of surfactants. Boiling in surfactant solutions, when compared with that in water, is observed to be more vigorous with smaller-sized, more regularly shaped and faster departure frequency bubbles, but the surfactant solutions of Triton X-100 and Triton X-114 become cloudy for the cloud point of surfactants.

和水相比，表面活性剂强化池内核态沸腾换热的最佳浓度为临界胶束浓度；不同种类表面活性剂强化换热程度不同，它们与表面活性剂的溶解特性、离子类型和化学结构有关；溶液沸腾时，沸腾汽泡的脱离直径变小，脱离频率变快和更不易聚集，但非离子表面活性Triton X-100和Triton X-114由于存在浊点其沸腾溶液变浑浊。

The memory effect of water magnetization may be maintained by the stable 3-molecule group structure of water.

水的稳定的3―分子集团结构可以维持水对磁化效应的记忆。

In the tunnel tunneling and in the process of the working surface mining, we can find out the water fault and the structure in advance, investigates thoroughly the hydrogeological conditions, and adopts seals off measure and some other reinforcement, it is a essential method that can realizes the under the water body and the bearing pressure aquatic security mining.

在隧道透纳和工作表面的采矿的程序中，我们能预先发现水过失和结构，彻底地调查 hydrogeological 情况，而且从尺寸和一些其他的增强收养印章，它是能了解的一个必要的方法那在水体和举止压力水生动物安全采矿之下。

The surface activity dose joins the queen, since jointly there is the water loving base group in the surface activity dose and detest the water base group in molecular structure , the pole is as a result easy to wind notable lessening menstruum surface tension from inside transition to interface in the solution.

液体分子在和空气等接触的表面会形成一层特殊的结构，表现为表面张力或表面能。表面活性剂加入后，由于表面活性剂分子结构中合有亲水基团和憎水基团，因而在溶液中极易从内部跃迁到界面上显著降低溶剂的表面张力。

Isooctane/sodium oleate/n-pentanol/water solution and liquid paraffin/Span 80-Tween 80/n-butanol/water solution both possess monocline crystal structure, and exhibit an even grain distribution. They have average particle size of 18nm and 5nm, respectively.

在四球长时抗磨损试验机上考察了分散于液体石蜡中Ag2S纳米颗粒的抗磨性能，通过扫描电子显微镜对钢球磨斑表面进行了形貌观测。

The structure is a nose-shape monocline that descents toward the center of hydrocarbon occurring from the northwest to southeast. The distribution of oil and water in the Zhaowa-Anpeng Oilfield is relatively complex. There is deep-basin oil pool that the oil/water contact occurs at the updip end of the accumulation in the horizontal continuous reservoir. It is a tight-sandstone oil pool, the reservoir has a low permeance, and the formational pressure is lower than normal.

构造呈现单斜背景上的鼻状，自西北向东南生油中心倾没；赵凹安棚油田深层系内油水分布较为复杂，在横向连续储层内，出现了油水关系倒置的深盆油；储层属非均质低渗透储层；从深盆油观点看，属一种动态致密砂岩油藏；地层压力异常低，甚至负异常压力。

The structure system of high performance submarine must have the ability to resist the high pressure under deep water and under water shock loading. Consequently, the aim of this research will be the capability of resisting high pressure, shock loading, and collision damage of pressure hull

高性能潜舰之结构系统，应具有极佳之抵抗潜深水压及水下爆震的能力，因此本文的研究为配合此目标之追求，将以潜舰压力壳之耐高压、耐爆震及耐冲撞的能力为研究重点。

This thesis first in detail introduced the basic knowledge of slope slip, including the classification of slip according to slope sliding surface, mechanical properties, the slipe time, slip reason, the slip stable degree and so on, also including the different influencing factors to the slope stability under these dissimilar conditions, i.e. the crag soil type and the nature, the geological structure, the ground water and the surface water, the earthquake, the human activity and so on.

本文首先详细介绍了滑坡的一些基本知识，包括按滑坡的滑动面、力学性质、滑坡的时代、滑坡的原因、滑坡的稳定程度等这些不同条件下对滑坡进行分类，也包括滑坡的岩土类型及性质、地质结构、地下水和地表水、地震、人类活动等不同的因素对滑坡的稳定性的影响。

Complicated working conditions, such as water-retaining structures to bear a lot of water pressure, Seepage from the osmotic pressure of building the strength and stability negative; sluiceway discharge structure, right bed and bank erosion has a strong role.

使工作环境复杂化，例如水保留的结构负担很多从建立力量和稳定阴性渗透压的水压，渗流；闸沟放电结构、正确的床和银行侵蚀有一个强的角色。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。