合成地

From the starting material: propargyl alcohol, the building block was prepared easily by Jones oxidation, esterfication, bromination and selective trifluoromethylation.

第一部分：从丙炔醇出发，经过Jones氧化，甲酯化，顺式二溴化，再选择性地在酯基的β位实现三氟甲基化，合成了目标含氟砌块。

It is the first example to synthesize Z isomers of propenoic acids and their derivatives highly stereoselectively by the nucleophilic addition of a carbon- carbon triple bonds.

这种利用亲核试剂进攻碳-碳叁键以高立体选择性地合成丙烯酸及其衍生物的方法尚无前例。

Flocculants in wastewater treatment has become increasingly widely used, in which high-performance composite coagulant in water treatment technology occupies an important position, to that end, research synthesis of a new type of high-performance composite PFS purificant PISC, and dying, coal washing, paper and municipal sewage and other industrial wastewater purification experiments confirmed that the water purification agent with the exception of turbidity, detreated reduce COD, BOD5 and SS functions.

在废水处理方面絮凝剂已越来越广泛地被应用，其中高效复合混凝剂在水处理技术中占有十分重要的地位，为此，研究合成了一种新型的高效复合聚铁净化剂PISC，并对印染、洗煤、造纸和城市污水等工业废水进行净化实验，证实该净水剂具有除浊、脱色、降低COD、BOD5及SS的功能。

A half-sandwich complex (N1) with pendant quinolyl group was successfully synthesized. The 〓HNMR spectrum indicated that the nitrogen atom was coordinated to the titanium center in this complex in solvent.

成功地合成了一个侧链含喹啉基的半夹心茂钛络合物，〓HNMR显示此络合物上的N原子与钛金属中心配位。

It developed for military affairs first in Occident .It utilizes the characteristic of NUV spectrum (240-280nm) that UV spectrum of object is much greater than that of solar radialization in the aerosphere. Double spectrums imaging system gets UV and visible images to identify the object and background. Image infusion is a essential step of succedent image processing.

它利用中紫外区的&日盲&(240—280nm的中紫外)特性，即目标发出的紫外线远远强于太阳的紫外辐射，通过双光谱图像检测系统观察和检测该波段的紫外目标信号与背景可见光图像，并利用图像配准与融合技术，把紫外光图像准确地定位于背景图像，形成合成图像达到检测目的。

This paper is devoted to the research of the detection of small target buried shallowly.

本文主要研究合成孔径探地雷达浅地层探测应用中的浅埋小目标的探测的信号处理方法。

Silicofluoride acid radical of the mother liquor will be transformed into sodium silicofluoride if excess sodium chloride was added,and the mother liquor was refined.The refined hydrofluoric acid and various aluminum can compose the by-product-cryolite,which can improve the collection rate of fluorin,aluminum and silicon.

其关键技术为氯化钠脱硅：投入过量氯化钠，使母液中氟硅酸根转化成副产品氟硅酸钠，母液被精制；再加入精制氢氟酸与各形态铝合成冰晶石副产品，从而有效地提高了氟、铝和硅的收率。

The effect of dexamethasone on gene expression of spermidine synthase in regenerating rat hepatocytes was investigated by in situ hybridization.

采用原位杂交技术研究地塞米松对大鼠再生肝细胞亚精胺合成酶(spermidine syathase， SPDS)基因表达的影响。

Micrographs show that composed microspheres have spheric and large number property, which can be injected in formation easily.

显微图像表明，合成微球具有很高的圆球度和庞大的数量特征，可方便地在线注入油层。

The mian works are as follows:(1)By coprecipitation technique and coprecipitation- gel technique the nano zirconia powder was produced, factors affecting the properties of nano zirconia powder such as pH and the content of stabilizator are analyzed;(2)By the new pressless sintering process, the nano zirconia ceramic was produced, factors which can affecting the properties of nano zirconia sinter body such as moulding press and the sinter temperature are analyzed;(3)By the microtherm pressless sintering process, the nano copper added functional zirconia ceramic composite was produced, microscopic dimensionality and electric properties of such sinter body and the factors affecting such sinter body are analyzed;(4)By the self-invented "external albumen coating" technique the zirconia powder was successfully coated by carbon in the corresponding sinter body, which can help solve the traditional aggregation problem to some degree;(5)Based on analyze the characteristics in the nano powder sinter process, the "three-ball sinter model" was proposed, for the relationship between the relative density and porosity of sinter body, by mathematical fitting, such model was successfully verified.

本研究比较系统地研究了纳米氧化锆陶瓷的合成与成型机理，特别是讨论了纳米氧化锆陶瓷的稳定性，为防止纳米颗粒在外场作用下的团聚和长大提供了理论基础和实验数据，具体工作有以下几方面：(1)采用共沉淀法和共沉淀-凝胶法制备了纳米氧化锆粉体，并分析了pH值和稳定剂含量对粉体性能的影响；(2)采用新型无压烧结工艺制备了纳米氧化锆陶瓷，并分析了成型压力和烧结温度对烧结体性能的影响；(3)采用低温无压烧结工艺制备出添加纳米铜的功能性纳米氧化锆复合陶瓷，并分析了烧结体的微观尺度和电学性能的变化以及影响因素；(4)通过自创的&鸡蛋清外敷法&在真空镀膜台上对纳米氧化锆粉体进行包敷碳颗粒的表面处理，并采用真空烧结工艺制得相应烧结体，初步开始解决陶瓷烧结过程中团聚长大这一传统难题；(5)通过分析纳米颗粒在制备烧结体过程中的实际特点，提出了&三球烧结数学模型&，通过引入坯体相对密度和孔隙率的相对关系分析并通过自行编写的数学拟合软件，验证了这一数学模型。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失