氮化的

We have used GC to follow up the formation of epoxy acid and established the acidify condition; we have done series of parallel experiments to better the pivotal condensation reaction between acid and amine; In the cyclization step, we use cheap and available reagent-Lithium amide , rather than expensive LiHMDS, to proceed the reaction; and at last, we introduced green reagent-ozone to clear the phenyl group of nitrogen to avoid using heavy metal reagent-CAN. The total yield for this method is 29.8%.

通过GC监测，确定环氧酸的最佳酸化条件；对关键的酸和胺的缩合步骤，平行试验了多种条件；在环合一步，用价廉易得的氨基锂及催化量的HMDS代替昂贵的LiHMDS进行反应；氮上苯基的脱除采用臭氧，避免了重金属试剂-硝酸铈铵的使用，总收率为29.8％。

This paper introduced a set of brandnew mobile air lifting technology for acidulation and cleanup by using the mature matching skill of downhole air pumping with the mobile injection equipment of surface nitrogen gas generation system.

应用成熟的气举采油井下配套技术，结合可以移动的地面制氮注入设备，形成了一套全新的移动式气举酸化排液技术，从而发展了塔里木油田的气举采油技术，并在塔里木哈得油田试验和推广应用中见到了较好的经济效益。

The bimodal pattern of nutrient variation is characterized by consumption in spring, increase in summer and autumn, and accumulation in winter.

河流输送量的变化，对氮的影响最显著，对磷的影响次之，但硅对河流的响应并不强烈，这因为胶州湾的硅主要来自底矿化。

In order to explore the relationship between structure and properties of hydroxyalkyl cellulose ether nitrate, molecular structures of nitrate ester of hydroxylethyl cellulose ether, nitrate ester of hydroxylpropyl cellulose and nitrate ester of cellulose glycerol ether with molar substitution of 1 were simulated by using Synthia module of Materials Studio, and their performances of nitrogen content, glass transition temperature and Young's modulus were predicted.

为探索羟烷基纤维素醚硝酸酯的结构与性能关系，借助Materials Studio软件中的Synthia模块模拟了摩尔取代度为1的羟乙基纤维素醚硝酸酯、羟丙基纤维素醚硝酸酯和二羟丙氧纤维素醚硝酸酯的结构，并预测了它们的含氮量、玻璃化转变温度和杨氏模量。

It Was found that a complex ordered carbonitride is formed on hot-rolling and continuous cooling by the precipitation of Nb and V together with C and N in which the contents of Nb and V are changeable.

利用透射扫描电镜和能谱仪对Nb-V微合金化钢中Nb和V析出相进行了研究，发现Nb和V在高温形变和连续冷却中，与C，N形成一种复杂的有序碳氮化物，其中Nb与V的含量是可变的，其浓度比值C_(Nb/C_V随着析出颗粒尺寸的减小而递减，化学式可写成C_(1-x，N_(1-y)。

Biogenic amines are basic nitrogenous compounds formed mainly by decarboxylation of amino acids or by amination and transamination of aldehydes and ketones.

生物胺是一类含氮的脂肪族、芳香族或杂环类低分子化合物，主要是通过氨基酸的脱羧或醛和酮的胺化和转氨基作用形成的。

The artifical fillers are hung under the plant floating bed then the remedial system combined by plant and microorganism came into being. The remedial effectiveness of the system was visibly better than that of the phytoremediation alone. So when the temperature is higher the remedial system combined by plant and microorganism is the preferable remedial technique to remedy contaminated water. In autumnal end and winterly outset, the temperature is lower, the plants begin to fade and die, and the plant must be harvested lest the relict of plant should contaminate water again. At the same time the technique combined by immobilized nitrogen cycling bacteria and microorganism which already existed in the water was used to remedy contaminated water.

将人工填料悬挂于植物浮床下，形成植物和微生物相结合的修复系统，其修复效果明显好于单独植物修复技术，因此温度较高时用植物和微生物共同结合的生物修复技术修复水体污染；秋末冬初温度较低时，植物开始死亡，必须将植物收割，以免植物残体造成二次污染，此时用固定化氮循环细菌和水体中原有微生物相结合的技术来修复水体的污染。

Chiral ligands mentioned above and their complexes with acetate copper were used as enantio-selective catalysts in asymmetric cyclopropanation reactions of diazoacetate and 1,1-diphenyl ethylene. Investigations indicate that all of them reveal certain optical-selective capability, but chiral C2-symmetric 2,6-bispyridine ligands show better catalytic capability than chiral asymmetric schifF-base ligands.

选择了2个手性2，6-吡啶双噁唑啉配体和6个手性不对称席夫碱配体与醋酸铜形成的配合物作为催化剂，对重氮乙酸乙酯与1，1-二苯乙烯不对称环加成进行催化反应，发现这8个催化剂对1，1-二苯乙烯的不对称环丙烷化反应都表现出了一定的光学活性诱导能力，手性2，6-吡啶双噁唑啉-铜类具有比手性Schiff碱-铜类更好的催化性能。

In this thesis, we reported ZrCl_4 and BiCl_3 catalyzed hydroamination of alkenes and the synthesis of two titanium imido compounds.

本文报道了用ZrCl_4和BiCl_3催化的烯烃的氢胺化反应的研究和两个含钛氮双键络合物的合成，全文共分为三大部分： 1。

Compared with the bulk Si3N4/SiO2 composite electret film before planar technology, the effect of the microminiaturization on the charge stability of this kind of electret film is also studied.

借助与未经平面工艺处理的氮氧化硅复合膜大片的对比，研究了这类驻极体功能膜的微型化对其电荷寿命的影响。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。