查询词典 retarding agent

Two times hydrolyzation of Fe~(3+) and Cr~(3+) was firstly pointed out in the process of pillar preparation with hydrothermal method. In order to improve the thermal stability, Fe/Cr-Si-pillaring agent solution was synthesized by hydrolyzing Fe~(3+) and Cr~(3+) solution on the surface of silica sol, and Fe/Cr-Si-pillared montmorillonite (Fe/Cr-Si-PILM) was prepared with conventional method and hydrothermal method. Because the technical innovation of preparation is the best way to improve the PILM properties, two novel methods (Microwave method and Ultrasonication method) have been studied to synthesize Fe/Cr-PILM.In order to expand PILMs new application in the field of coal conversion, catalytic activity of Fe/Cr-Si-PILM catalyst in LongKou lignite and ShenHua coal residue liquefaction was discussed and characterized in the last part of this paper.

研究证明：蒙脱石的预处理是可行的，我们以预处理后的Ca-M为原料，研究并优化了PILM的水热法制备工艺，提出了金属离子的二次水解法；为了提高PILM的热稳定性，我们自制了硅溶胶，合成了Fe／Cr-Si三元复合柱化剂，并制备了Fe／Cr-Si-PILM；在PILM合成中，制备技术的革新是改进PILM性能的重要方法，为此我们探索了微波合成法和超声波合成法在制备Fe／Cr-PILM中的应用；最后，我们选择龙口褐煤和神华煤液化残渣为研究对象，探索了Fe／Cr-Si-PILM催化剂在煤炭液化中的应用，希望能开拓PILM应用的新领域。

In addition, it was found that the presence of protic agent such as water would lead to the increase of pinacol byproducts.

本文还根据循环伏安实验和合成实验结果简要地讨论了反应机理。

Starting from chiral proline, pipecolinic acid, piperazine-2-carboxylic acid and 1,2-diphenyl amino alcohol, a series of structurally simple and easily prepared amides were developed as highly effective Lewis basic organocatalysts for the asymmetric reduction of imines with trichlorosilane as the reducing agent, which promoted the reduction of N-aryl imines with high yields and excellent enantioselectivities with an unprecedented substrate spectrum.

本文分别由手性脯氨酸、哌啶酸、哌嗪酸以及氨基醇出发，设计和合成了一系列结构新颖、合成简便、性能优良的酰胺类有机小分子路易斯碱催化剂，以廉价的三氯氢硅为氢源，用这些催化剂催化亚胺不对称还原，得到了非常优良的收率、对映选择性和前所未有的底物普适性。

Performance characteristics of self-prepared polycarboxylic acid formaldehyde free non-ironing finishing agent PC was investigated.

探讨自制聚羧酸型无甲醛免烫整理剂PC的应用性能。

The company was founded in June 2007, is Taiwan's polygram cosmetics company under the authority of the League of Spider King brand sole agent in China, responsible for online e-commerce to develop the Chinese market and international market.

本公司创建于2007年6月，是台湾宝丽金化装品联盟公司授权下蜘蛛王品牌产品在中国地区的总代理，负责开拓中国网上电子商务市场及国际市场。

Amphoteric surfactant ; monoalkyl phosphate ; polyphosphoric acid ; softness ; antistatic agent ; synthesis ; pro-perty

两性表面活性剂；磷酸单酯盐；聚磷酸；柔软性；抗静电性；合成；性能

Haemophilus parasuis is the etiological agent of porcine Glssers Disease, which can invade and cause severe systemic disease, characterized by fibrinous polyserositis, arthritis and meningitis.

副猪嗜血杆菌(Haemophilus parasuis，Hps)常引起猪的多发性浆膜炎、关节炎以及脑膜炎，由该菌引起的病又称为猪革拉斯氏病。

Study is made to treat non-chemical pulping paper-making wastewater with chemical process adopting polysilicate aluminium as coagulating agent.

用聚硅酸铝混凝剂处理非化学法制浆造纸废水，确定最佳混凝条件。

Poxy soft silicone agent EP-3 special soft touch.

P-3 特殊的柔滑手感。

POY and FDY oiling agent s on wetting, friction, heat-resisting, attrition-resisting properties, etc.

比较了国产和进口的适用于涤纶高速纺丝的预取向丝油剂及一步法牵伸丝油剂的润湿、摩擦、耐热、耐磨等性能，经实际生产应用证明二者的可纺性、上浆性、染色率基本相同。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"