多水的

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。

Pharmacopeia specification for phenol includes (1) purity is to be no less than 98 wt %,(2) clear solubility of 1 part of phenol in 15 parts of water,(3) a congealing temperature to be not lower than 39°C, and (4) a content of nonvolatiles of no more than 0.05 wt %.

给酚的美国药典规格包括(1)纯度是多达 98个重量%，(2)结清酚的 1个部分的溶解度在水的 15个部分中，(3)使冻结温度不是比 39个° C 低的，和(4)不超过 0.05个重量的非挥发性的内容%。

According to the unique characteristics of the pit edge top-down construction, this dissertation gives a lot of key nodes structural design and construction technique. It solves the problem of steel beam position to be through and local design of such structures as elevator hoistway or stair tunnel and one-column-multi-pile design and construction.

分别解决了梁柱节点位置钢筋穿越的难题；电梯井道或楼梯洞口等位置由于无法合理传递水平力所需做的结构局部补缺设计；一柱多桩的设计和施工方法；支护墙体与主体结构之间的连接所带来的如水平力传递、二次浇筑接缝、支撑穿越墙板止水方法等一系列技术问题。

Both niobic acid and niobium oxide can be used as either catalyst,promoter or support in the heterogeneous catalytic reactions,such as selective oxidation,hydration,hydrolysis,alkylation,dehydrogenation and hydrogenation,because of their acidic and redox properties.

作为一种新型的催化材料，铌酸-氧化铌由于其独特的酸性和氧化还原性正受到越来越多人的关注。它可以作为催化剂的活性组分、助剂或载体使用，在烃类转化、选择性氧化、水解、水合、缩合、加氢脱氢等若干酸碱和氧化还原反应中得到广泛的应用。

Bamboo charcoal able to sbsorb bad chemistry matter in the air, as chlorid, sulfid, formaldehyde, remove bad smelly and adjust humidity. If you but them into water, they also will adsorb aquatic chlorin and impurity.

这些微细的孔道具有超强的吸附能力，可以吸收空气中有害的化学物质如氯化物、硫化物、甲醛，除去臭气异味并可调节空气中的水分子，达到除溼和调湿的功能，若置於自来水中则可以吸附多馀的氯和杂质而使水质更加甘甜爽口。

But this probability might be counteracted by shortage of water due to more evaporation.

气候变暖使得农业生长的潜在生长季有所延长，为多熟种植制度的增加带来了可能，但是气温升高的同时，蒸发量增大，热量资源增加的有利因素可能由于水的匮乏而无法得到充分利用

When the underground water percolates through a soluble rock sequence along its fissure it will dissolve large amount of calcium carbonates and seep out from the sidewalls and the roof. Due to the changes in temperature and pressure, water evaporated and carbon dioxide escaped and the dissolved calcium carbonate in the water precipitated in various forms.

地下水沿着可溶性岩石和裂隙渗透，溶解了岩石中的较多的碳酸钙，通过洞顶或洞壁滴流出来，因为温度、压力的改变，水的蒸发，二氧化碳散失，使溶解在水中的碳酸钙沉淀下来形成各种形态。

For the cheating thing, make sense to me since I think the game gave people a great inspiration, not how much force to stone floating in the water floating and lifeless, like the Bureau of the Council are engaged in, water and air on the stone again and again deception, it will finally sink to the bottom.

对于欺骗的事情，我自认为打水漂的游戏给了人莫大的启示，不用多大的力让石片在水中浮浮沉沉，搞的像局中局，水和空气对石片一次又一次的欺骗，最终又将它沉入水底。

Furthermore, according to the Worldwatch Institute, each pound of grain-fed steak results in 35 pounds of eroded topsoil, and sustaining a meat-eater's diet requires more than 4,000 gallons of water daily versus 300 for vegetarians.

此外，根据世界观察协会的报告，每生产一磅以谷类饲养的牛排肉，就会造成35磅的表土遭到侵蚀。另外，为了生产一位肉食者的三餐饮食，每天需用掉4000多加仑的水，而素食者则只需300加仑。

Those researchers, led by Wajih Naqvi and Victor Smetacek, created a bloom of phytoplankton by fertilising an area of 300 square kilometres with six tonnes of iron sulphate, which dissolves in water. In two weeks the bloom's mass doubled.

这些由Wajih Naqvi和维克多·斯莫塔希克领导的研究者给300平方公里的海域里面投加了6吨的可溶于水的硫酸铁作为浮游生物的肥料已让他们生长。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。