化学纯

Comparison of the surface spectrum and normal spectrum suggests that the dye molecules are chemically adsorbed on the surface of the GaP nanoparticles.

通过将吸附碱性品红与纯碱性品红晶体样品的拉曼光谱进行对比、分析可知，碱性品红在纳米GaP粉体表面发生了化学吸附。

The mineral chemistry, trace elements and Sr-Nd isotopic geochemistry of different types of deep-seated inclusions indicate that Group Ⅰinclusions in western Shaudong could be the relicts of high degree of partial melting of the mantle-derived peridotites and then subjected to mantle metasomatism; the dunite and harzburgite in Group Ⅱ inclusions could be resulted from the metasomatism of silica-rich melts in the upper mantle; the olivine-pyroxenite and pyroxenite in Group Ⅱ and Group Ⅲ inclusions could be magmatic cumulates derived from magma underplating in the upper mantle.

不同结构类型深源岩石包体的矿物化学、元素和同位素地球化学研究表明，鲁西具有变质变形结构特征的橄榄岩类岩石包体为岩石圈地幔橄榄岩部分熔融后的残留体，其后又遭受了地幔交代作用的改造；具有变质变形结构，并叠加有矿物反应结构的纯橄岩和方辉橄榄岩类包体为古老岩石圈地幔被富硅质熔体改造的结果；具有残留岩浆结晶结构的橄榄岩、橄辉岩类岩石包体以及具有变晶结构或堆晶结构的辉石岩类包体为地幔更早期岩浆作用的在上地幔的堆积体。

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。

It has characteristics of chemical inertness , high-whiteness, high purity and equal particle size.

具有粒度分布均匀，化学性能稳定，色白、质纯特点。

The amorphous formation and non-formation region can be divided by a straight line in pure Miedema coordinates or a plane in three dimension chemical coordinates.

发现在纯Miedema坐标中非晶形成区与不形成非晶区能够用一直线分开，在三维化学坐标中用一平面分开。

Twenty-four compounds with a new constitute have been isolated and identified from Acropora pulchra collected from the North Sea , Porites Compressa Dana and Laurencia majuscule Lucas collected from Xisha Islands.

本课题对采自中国北海的佳丽鹿角珊瑚和南海西沙群岛的扁缩滨珊瑚、略大凹顶藻的化学成分进行分离，从中分离鉴定了24个化合物，其中一个为新化合物，7个为纯化合物，经GC-MS鉴定了14个化合物。

The mean activity coefficients of Li_2SO_4 and Li_2B_4O_7 for Li_2SO_4- Li_2B_4O_7-H_2O system at 298.15K and for Li2SO4-H2O and U2B4O7-H2O at 273.15K respectively were calculated using Pitzer model and the results reveal the rules of the mean activity coefficients of U2SO4 and U2B4O7 in the mixing solutions changing with the ion strengths and the molality fractions.

本文以化学计量形式计算获得的Pitzer离子相互作用参数，计算了273.15K下Li_2SO_4、Li_2B_4O_7在纯盐体系和298.15K下Li_2SO_4、Li_2B_4O_7在Li_2SO_4-Li_2B_4O_7-H_2O体系中的平均活度系数，揭示了Li_2SO_4、Li_2B_4O_7的平均活度系数随离子强度及不同yb值的变化规律。

Carbon and associated rare element gas isotopic compositions indicate that the genesis of the CO_(2 )is mainly by petrosal chemical reaction.

热力学分析表明，盆地7000～8000m深度段的地层远远没有达到纯钙质碳酸盐岩热分解所需的温度，碳同位素和伴生稀有气体氦同位素组成指示CO2主要为壳源岩石化学成因。

Chemometric method were used to analyze UV spectrum of TCAS-heavy metal complex, pure UV spectrum of TCAS-heavy metal complex and TCAS-heavy metal complex distribution curves toward concentration of heavy metals in solution were gained. Finally, complex constants of TCAS towards Cu, Zn, Cd and Pb were got to be 9.79、8.72、6.87 and 5.00, respectively.

采用化学计量学分析TCAS络合重金属的紫外光谱，获得了TCAS－重金属络合物的纯紫外光谱，以及TCAS、TCAS－重金属络合物随重金属浓度变化的分布曲线，并最终解析得到TCAS与Cu、Zn、Cd和Pb的络合常数分别为9.79、8.72、6.87和5.00。

The whole process is completed within 200 s. The 91Sr product is radioactively pure, with an overall recovery better than 90%. The decontamination factor is greater than 10^2 for 92Sr, and better than 10^3 for other radionuclides. The quality of 91Sr specimens thus prepared can meet the requirements for its decay data measurements.

用辐照235U的裂变产物溶液进行了全流程验证，得到的91Sr溶液为放化纯，Sr的化学回收率大于90%，对92Sr的去污因子大于10^2，对其它主要核素的去污因子大于10^3，结果满足衰变数据测量的要求。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。