Propyl glycidyl ether ( PGE ) was obtained from propyl alcohol and epichlorohydrin by phase - transfer catalysis.以环氧氯丙烷和正丙醇为原料,通过相转移催化法合成了正丙基缩水甘油醚.The FBC ( fluorous biphase catalysis ) is a new nonaqueous immobilization...
In specific acid catalysis, the undissociated acids do not contribute.在特殊的酸催化中, 不离解的酸不起作用.The corresponding reaction of acetaldehyde is subject to general base catalysis.乙醛相应的反应服从广义的碱催化.Catalysis has increased the rate o...
The ability to impart knowledge and command respect is the essential qualification for teachers...具备传授知识并赢得尊敬的能力是对教师的基本要求。The ability to impart knowledge and command respect is the essential qualification for teachers.具备...
Objective : To evaluate the wind - damage effects on quality of heartwood of Lignum Santali Albi.目的: 评价风害损伤对檀香药材质量的影响.Heartwood from dark brown to purple brown, alternating stripes.心材暗红褐至紫褐色, 具深浅交替条纹.Sapwood contains xyl...