coupling reactions造句

• Progresses in research on asymmetric hydrocyanation , asymmetric hydroformylation , asymmetric cross - coupling reaction and asymmetric hydrosilylation catalized by palladium - chiral phosphine - catalyst systems are reviewed with 36 references
  摘要综述了钯手性膦配体催化剂在烯烃的不对称氢氰化、不对称羰基化、不对称交叉偶联、不对称氢化硅氢化等方面的研究进展。参考文献36篇。
• The optimum conditions of coupling sde ligands through its - cooh to paam beads by edc are : ph of coupling is 4 . 6 - 4 . 8 ; the concentration of edc in reaction system must be higher than the concentration of sde ligands ; the time of coupling reaction is at least 12 hours
  Edc固定化sde配体的最适条件为：偶联时的ph值应保持在4石4 8 ；浓度要大大超过sde配体的浓度；反应时间不少于12小时。
• Carboxyanilineazo salt and 2 - hydroxyanilineazo salt were synthesized , and new azo reagent 4 - ( 2 - carboxyanilineazo ) - pyrogallol and 4 - ( 2 - hydroxyanilineazo ) - pyrogallol were synthesized through coupled reaction of 2 - carboxyanilineazo salt and 2 - hydroxyanilineazo salt with pyrogallol
  摘要合成了2 -羟基苯胺重氮盐和2 -羟基苯胺重氮盐，它们与连苯三酚偶联，得到新的偶氮试剂4 - ( 2 -羟基苯偶氮) -连苯三酚和4 - ( 2 -羟基苯偶氮) -连苯三酚。
• The results show that unbalance force of atmospheric motion and the coupling reaction among convective cloud cluster and moisture frontal zone and low level jet lead to the continuation of strong convergence in low layer and the maintenance of torrential rain
  分析结果发现，大气运动非平衡强迫、凝结降水的非均匀分布与强烈垂直风切变的耦合作用、 “湿度锋”与低空急流的耦合相互作用通过促进低空辐合流的维持，导致了对流云团和暴雨天气的持续。
• And then the sde ligands were immobilized on the spacer arms - containing paam beads by glutaraldehyde or edc to prepare the bionic adsorbents . the factors that can influence the immobilized ligand density were also studied . the optimum conditions of coupling sde ligands through its - nh to paam beads by glutaraldehyde are : the initial concentration of 5mg / ml ( 8g wet paam beads ) of sde gives more efficient results than the higher ones ; the concentration of glutaraldehyde which activated paam beads is 5 % ; ph of activation is 7 . 0 ; the coupling reaction time is at least 4 hours
  同时对影响sde配体固定化量的各种因素也做了初步的探讨，结果如下：戊二醛固定化sde配体的最适条件为： sde配体的初始浓度为sing ml （载体用量为sg ，湿重）时，效率最高；活化载体时的ph值为7刀；戊二醛的活化浓度为5 ：偶联时的ph值为7刀；偶联时间不少于4小时。