合成

Thesereagents were proved to be more efficient than the corresponding halophosphoniumand halouronium salts in terms of reaction speed and racemization.

与目前应用较广的卤代脲正离子型缩合剂和卤代磷正离子型缩合剂相比，这些缩合剂具有反应活性高、产物消旋小、收率高等诸多优点，既可以用于液相合成也可用于固相合成。

For instance, a compound can be synthesized with one of the atoms replaced by a radioactive isotope of the element.

例如，用某种放射性元素来代替原来的元素合成某一化合物，则放射性就可追踪这一化合物的合成过程。

The synthesis time was ^11min,and the radiochemical purity of the precursor was over 98%.

产物总合成时间11min，放化产率（90.2 2.5）%，放化纯度＞98%，合成成功率100%。

However, the low radiochemical yield of ~(18)F-FLT, long chemical reaction steps in the...

为了使~(18)F-FLT在科研及临床上得到广泛应用，本研究利用CTI公司生产的双管~(18)F-FDG合成模块进行~(18)F-FLT的半自动化生产；并探讨三种合成前体在不同温度和浓度下对~(18)F-FLT放化产率的影响。

Results The corrected yield was about 65% and radiochemical purity was over 99%.The rudimental water in reaction system affect the yield of 18F-FDG.

结果 Explora FDG4合成效率65%，18F-FDG放化纯度99% 18F-FDG其他指标符合药典质量要求，反应体系中残留的水等影响合成效率。

After the related researches on the arc spraying technology,it is quoted in the textthat arc spraying can be synthesized by the change of the elements of the manufacturingtechnology of Al_2O_3 millimian powder by reactively synthesized arc spraying has beenstudied experimentally.

本文在对电弧喷涂技术进行相关研究后，提出了改变电弧喷涂雾化气体成分，利用反应合成电弧喷涂的方法，试验研究了反应合成电弧喷涂制备Al_2O_3纳米粉体的技术。

Urea reactor is the core equipment of urea synthesis devices.

尿素合成塔是尿素合成装置的核心设备。

The test with the gravity anomalies and gravity gradiometry data of the synthesized Y-type dyke and multiple rectangular prism models shows that the method can image the spatial extension states and the distribution of equivalent excess masses of anomalous geological bodies with high resolution both longitudinally and transversely.

通过合成Y型岩脉模型和合成多个直立长方体组合模型的重力异常和重力梯度数据试验分析，验证了本文三维相关成像方法可显示出异常地质体的空间赋存状态和等效剩余质量分布，具有良好的纵向和横向分辨率。

Sharing synthesis process ; language recursiveness ; concurrent language ; concurrent composition of paths ; well path

共享合成；语言递归性；并发语言；路径并发合成；良径

The paper dyeing with natural pigment form flower of Chinese redbud was studied. The result indicated that the optimal pH value of dyeing was 3.5; the dyed paper was stable to heat and water by adding little amount of NaCl. The pigment can substitute the synthesized product in child product and food packaging paper partly to reduce the harm from synthesized product and meet the requirement of environmental protection.

本课题研究用天然紫荆花色素对纸进行染色是可行的，染色液适宜pH值为3.5，加入少量氯化钠可明显提高染色纸的色彩热稳定性，纸渗水的不褪色性好，染色效果好；天然紫荆花色素代替或部分代替合成色素生产儿童用品和食品包装用彩色纸可明显减少合成色素对人体造成的危害，符合环境对包装材料的要求。

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