步法

Using Hexamethylenetetramine as the catalyst and P-Hydroxyanisole as the inhibitor, glycidyl methacrylate were prepared by two-step method successfully.

本论文以六次甲基四胺为催化剂，对羟基苯甲醚为阻聚剂，采用酯化闭环两步法制备出甲基丙烯酸缩水甘油酯。

With oxalic acid and hexamethylenetetramine as the catalysts, and phenolic resin and tetraethoxysilane as the starting materials, a two-step sol-gel processing is developed for preparing Si〓N〓/SiC precursors with homogeneous microstructure composed of nanometer sized particles.

用草酸和六次甲基四胺为催化剂，酚醛树脂和正硅酸乙脂为原料，探索出了制备结构均匀而精细的Si〓N〓／SiC前驱体的溶胶—凝胶两步法。

To minimize the contamination of detrimental elements such as sulfurand chlorine, a two-step sol-gel process was successfully developed to synthesize SiC precursors with oxalic acid and hexamethylenetetramine HMTA as the catalysts, which are free of sulfur and chlorine. Tetraethoxysilane TEOS and phenolic resin were used as the silicon source and carbon source, respectively.

为了尽量减少硫、氯等有害元素的含量，本文用不含有害元素的草酸和六次甲基四胺HMTA为催化剂，正硅酸乙酯TEOS为硅源，酚醛树脂为碳源，成功探索出了制备SiC前驱体的两步法溶胶-凝胶工艺。

hhc filling process of RT M for the two step 3D braid shell prcform with a varying section.

采用分段一集合计算方法，对二步法三维编织变厚度变截面薄壁壳体RTM充模工艺过程进行了较深

The two—step sulfomethy lation and the reaction with HOCH〓SO〓Na in sulfite cooking were illustrated in this paper. The optimum technological conditions were determined on the basis of suitable amount of HCHO in sulfite pulping. The differences of delignification and paper properties of wheat straw were also studied in SFP—AQ and alkaline sulfite and AQ cooking .

对麦草粉的两步法磺甲基化反应以及与羟甲基磺酸钠的反应进行了研究，解释了甲醛在亚硫酸盐蒸煮中脱木素作用机理，从理论上确定了甲醛在SFP—AQ蒸煮中的适宜用量，并据此提出了合理的蒸煮工艺和最佳工艺条件。

The walk is a four-beat gait in which each hoofbeat is heard separately.

慢步是一种四拍的步法，每一个蹄音听起来都是分开的。

In this paper, initiator is dissolved in 1-bromopropane which is solvent. Then the propene and hydrogen bromide that can be dissolved in 1-bromopropane are inlet in l-bromopropane when initiator is decomposing. The reaction occurs in fluid phase and high-purity 1-bromopropane is synthesized by one step method. In this paper, the material HBr is synthesized with NaBr and sulfuric acid at the presence of hydrobromic acid.

本论文以1-溴丙烷为溶剂，将引发剂溶于其中，加热到引发剂开始分解时再通入丙烯和HBr，使二者溶解于1-溴丙烷中，在液相中进行反应，实现丙烯"一步法"合成高纯1-溴丙烷利用NaBr与硫酸在氢溴酸存在下反应制备HBr气体，以作为合成1-溴丙烷的原料。

The results also indicate that the Ph stability and the concentration of N exert a great influence on the growth of C reinhardtii- se and the acetic acid is the key substance for hydrogenase induction.

综合考虑两步法产氢对细胞生长周期和细胞密度的要求以及最终厌氧诱导获得的氢酶活性，最终选择seTA培养基作为莱茵衣藻- se 产氢用培养基。

Preparation of ZnO micro-nano composite hydrophobia film via three-step method ;2. In this paper basic steps of structural dynamic damage detection are discussed and a three-step method for structure damage diagnosisis proposed.

以位于广东新会的崖门桥(双塔刚构体系预应力单索面混凝土斜拉桥)为工程背景，探讨了结构动力损伤识别的基本步骤以及利用结构动力损伤识别三步法对大型工程结构进行损伤识别的有效性。

So developing technique of synthesizing IBA in one-step has very important meaning.

因此开发研究一步法合成异丁醛具有十分重要的意义。

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