A new synthetic method glyceryl monolaurate(GML) from glycerin and lauric acid via protected hydroxy groups by boric acid was studied.
研究了以甘油、月桂酸为原料，用硼酸保护羟基进行酯化反应合成甘油单月桂酸酯的新方法。
The chain extender is used to convert the low-activity hydroxy groups of both ends of the polydimethylsiloxane into high-activity isocyanate groups.
扩链剂是用来将聚二甲基硅氧烷两端活性较弱的羟基转变为高活性的异氰酸酯基。
An UV curable corrosion resistant coating consists of an epoxy-base monomer, combined active diluents with hydroxy groups, combined photoinitiators, an adhesion promoter.
所研究的UV固化防腐蚀涂料包括环氧类的单体，带羟基功能团的复合稀释剂，复合光引发剂和粘附力促进剂。
The experimental results show that the replacing of the hydroxy groups with acetoxy groups in the resin causes less water uptake, but increases the diffusibility of water in the resin.
实验结果表明，该树脂中的羟基改为乙酸基后可降低树脂的饱和吸水率，并增大水在树脂中的扩散能力。
Titanium dioxide has unique characteristics, such as the surface hydroxy groups involved, wetting properties, surface acidity or basicity, surface electrical properties and photochemical activity.
二氧化钛具有表面羟基、润湿性、表面酸碱性、表面电性、光化学活性等表面物理化学性质。
Suitable hydroxy-protecting groups are ether-forming groups that can be removed easily after completion of all other reaction steps.
任意基团在反应步骤完成后可以很容易地除去的基团都适合做羟基保护基团。
Lastly, of course, the main reaction of interest is the formation of urethane groups by reaction of isocyanate groups and hydroxy - groups of the polyester or polyether.
最后，当然，利息的主要反应是异氰酸酯基和羟基的聚酯或聚醚组反应形成聚氨酯组。
The results of the properties tests show that the adhesive has stronger adhering force when the reactive diluent has more hydroxy and carboxyl groups.
活性稀释剂中含有较多的羟基、羧基时，此胶粘剂对玻璃的粘接强度较高；
The groups in ring of benzaldehydes, no matter they are electron withdrowing or electron donating except of hydroxy, do not seem to have much effect on the yield.
羟基处于醛基邻位和对位的苯甲醛与几种苯乙酮衍生物的缩合，多数没有得到预期的产物，或收率极低；苯乙酮环上的羟基对缩合反应影响很大，羟基越多，缩合越困难。
The groups in ring of benzaldehydes, no matter they are electron withdrowing or electron donating except of hydroxy, do not seem to have much effect on the yield.
羟基处于醛基邻位和对位的苯甲醛与几种苯乙酮衍生物的缩合，多数没有得到预期的产物，或收率极低；苯乙酮环上的羟基对缩合反应影响很大，羟基越多，缩合越困难。
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