使酸化

Sinochem owns independent IPR for the 20,000-ton/year PTMEG equipment and 180-ton/year polyacid catalyst equipment and fills the gap in technology in China. The commencement of its operation makes Sinochem one of the major manufacturers of PTMEG and THF in China.

2万吨/年PTMEG装置和配套的180吨/年杂多酸催化剂装置，是中化太仓拥有自主知识产权并填补国内技术空白的项目，该项目的投产运营，使中化成为国内最主要PTMEG、THF生产商之一。

It showed that carboxylic saline in the molecule of zinc norfloxacine produced negative electric charge average distribution because of carboxylic saline forming carboxylic radicel.

说明氟哌酸锌中羧酸的盐类因形成羧酸根负离子，使负电荷平均化。

PKA can phosphorylate many proteins at serine and/or threonine residue to regulate cell metabolism and gene expression.

PKA被cAMP激活后，能在ATP存在的情况下使许多蛋白质特定的丝氨酸和/或苏氨酸残基磷酸化，从而调节细胞的物质代谢和基因表达。

The invention relates to a process for producing polyethylene terephthalate 1, 3-propanediol, which comprises the following steps: using titanic acid ester as major catalyst, using germanium compounds and cobalt compounds as synergic catalyst, conducting esterification reaction for poly terephthalic acid and 1, 3-propanediol according to the molar 1:1.05-2.2 under the nitrogen pressure of 0.1-0.4MPa and 230-265 DEG C, or conducting ester exchanging reaction for poly terephthalic acid and 1, 3-propanediol according to the molar ratio 1:1.8-2.2 in 160-220 DEG C, decompressing reaction to high vacuum 10-150Pa, wherein the final temperature of reaction is 265-275 DEG C, recovering to normal pressure with nitrogen to obtain the PTT product.

本发明涉及一种生产聚对苯二甲酸1，3-丙二醇酯的方法，采用以钛酸酯为主催化剂，锗化合物和钴化合物为协同催化剂，对苯二甲酸二甲酯和1，3-丙二醇按摩尔1∶1.05-2.2，在0.1-0.4MPa氮气压力和230-265℃下进行酯化反应，或对苯二甲酸二甲酯和1，3-丙二醇按摩尔比1∶1.8-2.2，在160-220℃进行酯交换反应，将反应减压至高真空10-150Pa，反应终温在265-275℃，用氮气恢复到常压，得到本PTT产品；大大缩短了反应时间，直接聚合制备特性粘度在0.7-1.05dL/g的PTT切片，使反应产物色相良好，PTT产品可用于纤维加工及工程塑料领域。

High content glutamic acid of human finger nail relate with efficacy of human ungual hematischesis,cure decay;fibrous keratin of human finger nail contain rich cystine to provide strongdisulfide bond to finger nail which has biology characteristic of tension and rigidity.

人指甲中高含量的谷氨酸与人指甲的止血、化腐功效有关；人指甲中纤维性角蛋白中富含的胱氨酸提供了牢固的二硫键，使指甲具有张力和硬度的生物学特性。

Using castor oil as material, this paper reported a two-step reaction combined with saponification and oxidation for azelaic acid synthesis.

本文以蓖麻油为原料，经过皂化、氧化两步反应合成了壬二酸，该合成工艺使反应条件变得比较温和，后处理大为简化，产品纯度明显提高，总收率提高到80％。

When the coverage is increased,the aspartic acid molecules can finally form an overlayer with uniform contrast but could never form any ordered structures.

随着覆盖度的提高，天冬氨酸分子最终在Cu(0 0 1)表面形成一均匀衬度的吸附层，但并不形成有序吸附结构，也不能使台阶发生小面化。

Zn-La alloys increase the overpotential ofhydrogen evolution, Tafel slope 〓 and polarization, decrease the corrosion current density, inhibitthe corrosion of zinc electrode in alkaline solution, decrease anode Tafel slope 〓, promotedischarge reaction of zinc electrode, have higher passivation current density, inhibit thepassivation of zinc electrode, avoid the oversaturation of zincate in electrolyte, greatly increase〓 diffusion coefficient, decrease Tafel slope 〓, polarization and the overpotential of deposition,inhibit the dendrites formation and improve the electrodepostion of Zn.

实验结果表明，Zn-La合金电极显著改善了锌电极的各项电化学性能：提高析氢过电位、析氢过程Tafel斜率〓和极化，减小腐蚀电流密度，抑制锌电极在碱液中的腐蚀；降低阳极Tafel斜率〓，促进了锌电极的放电反应；具有较高的维钝电流密度，抑制锌电极的钝化；有效避免了溶液中锌酸盐的过饱和现象：使〓的扩散系数明显增大：降低Zn沉积过程的Tafel斜率〓、极化和沉积过电位，明显抑制锌枝晶的生长，改善了锌的电沉积性能。

In acid pulp, the depressing abilities of reagents on diaspore are in the order of hydroxamic acid starch＞dialdehyde starch＞carboxymethyl starch＞cationic starch＞primary starch. In addition, hydroxamic acid starch and carboxymethyl starch can activate kaolinite without influence on the recoveries of pyrophyllite and illite, so the two reagents have great potential and prospect to be the depressant of diaspore and the activator of kaolinite in bauxite reverse flotation.(3) By oximation of the copolymer of acrylamide and methyl acrylate, hydroxamic acid polyacrylamide is synthesized.

3对丙烯酰胺和丙烯酸甲酯的共聚物肟化制得氧肟酸聚丙烯酰胺，将它同非离子聚丙烯酰胺、阴离子聚丙烯酰胺、阳离子聚丙烯酰胺和两性聚丙烯酰胺分别应用于四种矿物的单矿物浮选试验，结果显示，改性聚丙烯酰胺对一水硬铝石、高岭石和伊利石均具有活化作用，其中，药剂对高岭石的活化最强，使它的回收率在整个pH值范围达到80％左右，在一定pH条件下超过一水硬铝石的回收率，解决了高岭石难浮选的问题。

Pentanediol reacted with phosphorus tribromide to make it mono-bromination, under the catalytic action of PPTs it reacted with 2,3-dihydropyran to protect another hydroxy group, then to react with triphosphine, produced quarterphossal.

再以1，5-戊二醇为原料，三溴化磷使之单溴代，得到5-溴-1-戊醇，在对甲苯磺酸吡啶盐的催化下与2，3-二氢吡喃反应保护其另一端的羟基，与三苯基膦反应生成季磷盐。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。