查询词典 synthesis method

In this thesis, we developed a new method to construct 2, 3, 6-trisubstituted piperidines using enantiopure -amino acid derivatives as the starting material and applied them to the synthesis of some piperidine alkaloids which showed interesting physiological activities.

本论文中，我们从非手性原料出发，通过手性胺对、(-不饱和酯的Michael加成来获得光学纯的-氨基酸酯，发展了一种构建2、3、6-三取代哌啶环的方法，并利用这种方法合成了一些具有重要生理活性的生物碱类天然产物。

Which doesn't pollute environmen t.This method for synthesis of 4-(1,3-benze-dioxole)-3-buten-2-one uses Claison -Schmidt reaction of piperonal and acetone between wate r phase and organic phase.

这种不污染环境的合成方法是用洋茉莉醛 [1 2 0 - 57- 0 ]与丙酮 [6 7- 6 4 - 1 ]在水相和有机相之间进行克莱森-施密特反应；产物分离后有机层循环再用，水层经过活性炭吸附处理后也循环使用，做到了无试验废水排放。

The method for pitchblende synthesis in temperature range of 17 to 115℃ and its identification are described.

本文介绍了17—115℃沥青铀矿合成的方法及对产品的鉴定结果。

Good results show that the genetic algorithm is an effective method to solve plane wave synthesis problem.

遗传算法[2]作为一种强鲁棒性的基于随机搜索的算法，在复杂的电磁场计算中体现了越来越突出的潜力，正成为人们关注的一个热点[3]。

Several factors affecting the synthesis of urea-formaldehyde resin adhesive,including formaldehyde to urea molar ratio,urea adding method,pli value,reaction temperature,reaction time,were discussed and several modifications of urea-formaldehyde resin were also compared.

介绍了脲醛树脂胶粘剂的研究现状与进展方向。探讨了影响脲醛树脂胶粘剂合成的主要因素，包括甲醛-尿素摩尔比、加料方式与顺序、pH值、反应温度和反应时间等，并比较了不同的改性方案。

For a series spatial and planar mechanism synthesis, synthetic equation set can be established according to the kinematics requirement and characters of the mechanism. Then trigonometric functions are rationalized so as to create a polynomial system =0 , and the polynomial solution=0 is obtained with synthetic elimination method.

对于平面机构与空间机构的各类综合问题，根据各种机构的运动综合要求和机构的特点，建立机构的综合方程组，然后通过三角函数的有理化，将综合方程组化成多项式方程组=0，并采用综合消元法求得其多项式解=0，进而求得待定的机构参数。

And includes the following aspect: 1 The synthesis of dendritic polyvalent glycol-conjugates ligand were concluded which can provide a new method to find new medicine.

本文包括以下几个部分： 1 合成树枝状多效价糖苷配体是找到新的抗感染、抗病毒、抗HIV药物以及人体疫苗等的重要途径。

Based on above research, the synthesis evaluation method of reliability for pyrotechnics was given.

在以上研究的基础上，论文应用序贯试验数据和计数数据，给出了火工品可靠度的综合评估方法。

A new method of solvent-thermal synthesis of Meso-tetra(4-carboxyphenyl) zincporphyrin complexs, using the propionic acid and the DMF as solvents and the salt of zinc, catalyst-;pyrrol,4-carboxybenzaldehyde, as reagents.

报道了用丙酸和DMF作溶剂和催化剂，直接用吡咯，4 羧基苯甲醛，锌盐合成Meso 5，10，15，20 四锌卟啉配合物的新型方法———溶剂热合成。

The characteristics of quinazoline epidermal growth factor receptor inhibitors were briefly described in this paper, and the mechanism of receptor-tyrosine kinase inhibitor was also introduced. The synthesis of this kind of new compound was studied, and the synthetic route was redesigned and the method was modified.

本论文简述了受体酪氨酸激酶小分子抑制剂的发展概况，详细介绍了新型喹唑啉类表皮生长因子受体抑制剂，着重研究了该类化合物的合成，设计并打通了合成路线，同时又合成了25个新化合物。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。