Methods: α - Bromo - 4 - benzyloxy acetophenone is synthesized with 4 - hydroxy acetophenone and bromonium as materials and methanol as solvent.方法: 以甲醇为溶剂,以对羟基苯乙酮和溴为原料制备了α - 溴-4-苄氧苯基苯乙酮.Thus , this reduced temperature of...
Thus , this reduced temperature of reaction and increased the rate of acetophenone.降低反应温度,提高了苯乙酮的收率.Objective: A new approach to prepare α - bromo - 4 - benzyloxy acetophenone was introduced.目的: 报道一种合成α - 溴-4-苄氧苯基乙酮的新方法....
所有四价配位体对铜都有钝化效果,能与铜形成平面的四价配位络合物.All the tetraderadentate ligands were found to be effective with copper, which forms planar four - coordination complexes.可以通过形成络合物的方法来破坏氰离子发生钝化作用.The destruction on inactivation of cyanid...
Removal of the emboli was performed smoothly under TEE monitoring.在术中,我们使用经食道心脏超音波随时监看血栓和心脏功能.The emboli are divided into 4 kinds according to the shapes.根据肺动脉内栓子形态分4类.The heart a common source for such emboli.心脏是这种拴子的常见...
If these drugs are stopped abruptly then some withdrawal symptoms may occur.如果突然停服这些药，则可能出现一些戒断症状。If you take these drugs continuously, withdrawal must be tapered.如果你一直在服用这些药，停药时一定要逐渐停。The security forces had made a tact...