查询词典 first-order reaction

The thesis are divided into two parts. In the first part, we used 2,4,6-trichloro-1,3,5-triazine as the precursor to react with sodium which have been achieved by decomposing sodium hydrate at 623 K. At a low reaction temperature of 623 K, carbon nitride nanosphere、porous carbon nitride material and byproduct sodium chloride, would be produced.

本研究将分成两部份，第一部分是在低温下(623 K)将氢化钠粉末热裂解，生成表面积较大的熔融态金属钠，使气态的氰尿醯氯通入与熔融态金属钠在623 K反应，生成奈米氮化碳球、奈米孔洞性氮化碳材料及副产物氯化钠。

The first part of this research is to detect the mutation of hMR-1 gene by using non-isotopic polymerase reaction-based single-strand conformation polymorphism.

初步研究表明该蛋白是一种膜蛋白，这种膜蛋白与肌肉收缩调控以及细胞信息传导和凋亡过程相关。

In the present dissertation, a surfactant-templated mesoporous silica molecular sieve with high pore volume, high porosity and narrow bimodal mesopore size distribution was synthesized for the first time in a reaction system, which was used usually in the synthesis of mesoporous MCM-41 molecular sieves, by a judiciously controlled two-phase sol-gel processing under basic conditions.

在本论文中，我们通过对一个通常用于制备介孔MCM-41分子筛的反应体系中正硅酸乙酯水解与缩合反应相对速率的精确调控，首次在弱碱性体系中合成了一种具有高孔隙率、大孔体积和双介孔孔分布特征的新型二氧化硅分子筛材料，简记为BMS，并对BMS二氧化硅分子筛中双介孔结构形成的原因及各种可能对其结构和性质产生影响的合成因素如Ammonia／silica摩尔比、组分浓度的变化、表面活性剂烷基链长度的调节、辅助有机物均三甲苯的引入、催化剂的结构和性质、溶剂和助溶剂的极性和用量、老化和干燥条件的变化及合成后水热处理等，利用不同的测试手段如XRD，SEM，TEM，〓Si MAS NMR，TG-DTA，N〓吸附测试等进行了系统的表征研究。

ABSTRACT The self-propagating combustion reaction in Ti-W-C system has been studied systematically for the first time.

本文首次对Ti-W-C体系的自蔓延高温合成反应进行了系统的研究。

But in the condition when the first project is characters and the end project is pictures , the reaction time is faster when the end project is also characters , along with that the transformation speed of imagery presentation is faster than that of proposition presentation, the reason may be that imagery presentation can stimulate proposition presentation automatically, the transformation is self-moving processing and independent from will, but it is not self-motive but controlled processing and will needs when the proposition presentation transforms into imagery presentation.

但在首项目是字的时候，尾项目是图的条件下被试反应时快于尾项目是字的条件下，又表明图像表征比命题表征的转换速度快，原因可能是由于图像表征能够自动激活命题表征，其转化是自动加工的、几乎不信赖于意志努力的，而命题表征转化为图像表征却不是自动的，而是控制加工的、需要意志努力的过程。

Their first reaction is to go down to the field and start digging up the weed.

他们的第一个反应是，赶快到田里去拔出所有的稗子。

On the first time I had a huge allergic reaction to glasses actually.

在上第一次我实际上有了巨大的患过敏症的反应到杯子。

Panic was my first reaction to the multiple choice options which lay on my desk in front of me.

这么多的选择摆在我面前的桌子上，我的第一感觉便是恐慌。

In 1939, Drs. Philip Levine and Rufus Stetson published in a first case report the clinical consequences of non-recognized Rh factor, hemolytic transfusion reaction and hemolytic disease of the newborn in its most severe form.

1939年，菲利普列文博士和鲁弗斯斯泰特森博士发表了第一病例报告，临床结果中没有Rh因子，在最严重的形式是产生溶血性输血反应和溶血性疾病。

It was the first industrial process to use high pressure (200-400 atmospheres) for a chemical reaction.

这是第一个在化学反应中使用高压(200～400大气压)的化工方法。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。