查询词典 tertiary amine

Our calculations suggest that this class of non-classical transplatin analogues with one nonplanar heterocyclic amine decreases the equatorial steric effect and the hydrolysis reaction barriers.

计算表明，这些含有非平面杂环胺反铂的配合物减小了赤道面上的立体效应和水解势垒。

With the addition of octadecyl amine, the pore sizes and thespecific surface area of the samples are increased evidently.

添加十八铵与CTAB共同作用，可以使产物的孔径和比表面积有明显增加。

Octylene was synthesized via tetramerization of ethylene at the presence of a catalyst system consisted of chromium acaet as primary catalyst, methylaluminoxane as cocatalyst, bis amine as ligand under high pressure. The effects of different PNP ligands on catalyst activity and selectivity to 1-octene were investigated.

在乙酰丙酮铬、甲基铝氧烷、配体三元催化体系中，以乙烯为原料在高压下齐聚生成1-辛烯，主要考察N原子上取代基不同的PNP配体对催化剂活性及1-辛烯选择性的影响。

For very long time, many research groups focus on using more than a stoichiometric amount of a chiral auxiliaries to obtain high enantioselectivity. There were mainly two sorts of processes reported on highly catalytic asymmetric addition of Grignard reagents to aldehydes. The former case was to transform Grignard reagent RMgX into other organometal reagents such as R_2Zn and R-Ti derivatives via complicated procedures at extremely low temperature. The later case was to link a chiral ligand to Mg in the form of organomagnesium amides or use chiral amine ligand catalyzing the alkylation of aldehydes.

格氏试剂对醛的不对称加成的报道大多需要大量的手性助剂以获得高的光学活性，而高度催化的格氏试剂对醛的不对称加成主要通过两种途径进行：一种是把格氏试剂转化成其他的有机金属试剂如R_2Zn和R-Ti化合物再对醛进行加成，反应通常在低温下进行；另一种是利用手性镁胺作为中间体或直接用手性胺催化来完成此反应。

Products have good thermal stability anddecomposition temperature above 200℃; Selected lauryl amine as a case, then optimizedthe synthesis conditions by orthometric trial, and obtained the best synthesis technichs: themolar ratio of 1: 2.1, the reaction temperature was controlled at 80℃and the reaction timeof 16 h, reaction to the solvent n-propanol.

并对其热稳定性进行了分析，合成产物具有较好的热稳定性，分解温度都在200℃以上；以十二胺为例，用正交实验法优化合成条件，获得最佳合成工艺为：摩尔配比为1：2.1，反应温度控制在80℃，反应时间为16h，反应所用的溶剂为正丙醇。

Methyl nitrate, N-nitrobis (2-hydro- xyethyl)-amine dinitrate, nitroglycerine and pentaerythrite tetranitrate, it is found that AM1 method is better than the other methods for predicting molecular geometry.

三种方法的计算结果与已报道的四个化合物(硝酸甲酯、吉纳、硝化甘油和太安)的实验结果相比， AM1法较好。

The additives including tricresyl phosphate, dibutyl phosphite, dodecylamine and a phosphated amine salt were used.

采用X射线光电子能谱仪分析铝试磨痕表面边界润滑膜中的P和N元素的化学状态。

The additives including tricresyl-phosphate,dibutyl phosphite,dodecylamine and a phosphated amine salt were used.

采用SRV摩擦磨损试验机评价了磷酸三甲酚酯、磷酸二丁酯、十二胺和磷酸胺盐抗磨添加剂在液体石蜡中对钢-铝摩擦副摩擦磨损性能的影响。

In this paper,the method for synthesis of 5 new phosphonic acid products,from the reactions of 2-amine thiadiazole and different aldehydes with phosphorous acid by the melting method or the solvent method,was introduced.

用2-氨基噻二唑、醛与亚磷酸反应，应用融熔法与溶剂法合成了一系列新的噻二唑膦酸，并用IR、1HNMR、31PNMR等方法对化合物进行了表征。

In the fermentation material properties, loose 24-48 hours, days, 15 days of deodorization into fat, not only speed than the planimetric fermentation, and still more effectively prevents the fermentation of hydrogen sulphide, amine such harmful gas and bio-degradability of odorous gases, accord with environmental protection requirement, namely, and can produce good biological fertilizer.

发酵物料在这种松散物料性状下，24-48小时升温、三天除臭、15天左右成肥，不仅比深槽发酵速度快的多，还有效防止了发酵过程中硫化氢、胺气、吲哚等有害、恶臭气体的产生，即符合环保要求，又能生产上好的生物有机肥。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。