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- This bond is a weak electrostatic force of attraction between the pro ton of a hydrogen atom and the electron cloud of a neighboring electro-negative atom. 氢键是氢原子核及其相邻的负电荷原子的电子云之间的一种微弱的静电吸引力。
- When Mg2Al-CO3-LDHs was used the anion exchange reaction did not accur. 以Mg2Al-CO3-LDHs为前体，用离子交换的方法不能制备丙烯酸插层水滑石AA-LDHs。
- This complex reaction is characterized by a keto-enol tautomerism eqilibrium and ester exchange reaction. 此螯合反应是由酮一烯醇互变异构平衡过程和酯交换反应组成。
- There is close relation betweenthe ATP_b-Pi exchange reaction andenergy transduction of thylakoid mem-brane. ATP_b-Pi 交换反应与类囊体膜的能量转换有密切的关系。
- The catalytic gas liquid isotope exchange reaction is a good method to prepare tritiated triptolid. 采用催化气液同位素交换法制备了氚化雷公藤甲素,探讨了反应时间和反应介质对反应产额的影响。
- The alcohol producing in the exchange reaction reduces the yield of furan phenol by the further by-react... 探讨了呋喃酚环合反应质子酸催化机理。
- Butyl lactate was synthesized by the ester exchange reaction of D,L-lactide and n-butanol under the catalysis of sulfuric acid. 研究了D,L-丙交酯在浓硫酸催化作用下与正丁醇进行酯交换反应合成乳酸丁酯的条件。
- Quaternary ammonium salt of chitosan was synthesized starting from chitosan, triethylamine and ethyl chloroacetate by ester exchange reaction. 以三乙胺、氯乙酸乙酯和壳聚糖等为原料,采用酯交换法合成了壳聚糖季铵盐。
- Takeshi I,Masahiro K,Akihiro P.Process for preparation of glycidyl methacrylate by catalytic ester exchange reaction:JP08239372[P].1996-09-17. 刘亚康;毛优平;金关泰.;丙烯酸缩水甘油酯的合成工艺研究[J]
- After they go through the exchange reaction of macromolecule chain,we obtain polyester-amide hot melt adhesive for textile. 研究了以聚酯胶和聚酰胺胶为原料在催化剂作用下加热共熔,通过大分子链交换反应制备织物用聚酯酰胺热熔胶的方法。
- Preparing fatty acid methyl ester was achieved by reap oil ester exchange reaction by using new type solid alkali catalyst(LDH/LDO). 采用新型固体碱催化剂LDH/LDO进行菜油酯交换反应制备脂肪酸甲酯;产率达98.;5%25以上。
- Chemical Water Treatment Equipment: widely used to produce softened industrial water, desalted water, industrial pure water and urban drinking water through exchange reaction. 化学水处理设备：广泛应用于工业软化水、脱盐水、工业纯水及城市饮用水等方面。通过交换反应，达到水质软化或除盐的目的。
- In this paper,the properties and synthesis process of dimethyl carbonate are systematically reviewed, including ester exchange reaction and methonal carbonyaction. 介绍了碳酸二甲酯的性质及合成方法,包括光气法、酯交换法和甲醇氧化羰基化法及其它方法;
- The maximum load for this lorry is one ton. 这辆卡车最大载重量是一吨。
- This paper deals with a new synthesis process of organobentonite using highly purified sodium - based bentonite as raw material through ion exchange reaction. 研究了以高纯钠基膨润上为原料,通过离子交换反应合成有机膨润土的工艺,探索了温度、反应时间等对产品质量的影响。
- This arrangement will have to do pro tem. 暂时只好这样安排。
- No. we normally refer to metric ton. 不，我们通常指公吨。
- Much has been written on the subject pro and con. 对那问题已有很多赞成和反对的文章。
- The pirates captured the ship and a ton of gold at a blow. 海盗们闪电般取了船和一吨黄金。
- Put together the pre-esterified grease and the methanol; adopt secondary reaction to eliminate the glycerin engendered in the first reaction to continue the ester exchange reaction. 经预处理的油脂与甲醇一起，采用二步反应，除去初反应中生成的甘油，使酯交换反应继续进行。
