A method to recycle tetramethyl guanidine from the cefradine waste;
从头孢拉定母液中回收四甲基胍的方法
Multiphoton ionization spetroscopy and mass spectral study of tetramethylsilane with violet laser radiation;
紫激光作用下四甲基硅的光谱和质谱研究
These results indicated thattetramethylsilane had different MPI process under the different laser rebation.
本文采用超声分子束技术,以飞行时间质谱仪,在396~387nm内的紫激光作用下对四甲基硅进行了多光子电离飞行时间质谱的研究,在较高的激光能量作用下检测到了Si(CH3)(n=1,2,3,)、Si+及等多种离子的信号,在较低的激光能量作用下只检测到了Si+、等离子的信号,表明四甲基硅在不同激光能量作用下经历了不同的多光子电离过程。
The high purity 1,2,4,5 tetramethyl benzene was obtained from the crude feed through crystallization bubbling and static mixer fractional crystallizer.
在气泡分步结晶工艺基础上 ,开发了静态混合气泡结晶技术来提纯均四甲苯。