受腐蚀混凝土结构加固方法

1工程概况 某制药产业磺胺厂房建于20世纪60年代末,框架结构,已使用30多年.该厂房内常年受酸、碱气相和液相的腐蚀,板、梁、柱、框架均发生不同程度的损坏,局部钢筋也受到锈蚀,结构安全受到极大影响,已不能满足正常使用要求,急需加固处理.     

水-有机溶剂混溶体系中催化抗体催化拆分布洛芳脂

The asymmetric hydrolysis of racemic ibuprofen ester is one of the most important methods for chiral separation of ibuprofen. In this work, a catalytic antibody that accelerates the rate of enantioselective hydrolysis of ibuprofen methyl ester was obtained against an immunogen consisting of tetrahedral phosphonate hapten attached to bovine serum albumin (BSA). The catalytic activity of the catalytic antibody in the water-miscible organic-solvent system composed of a buffer solution and N, N-dimethylformamide (DMF) was studied. With 6% DMF in the buffer solution (containing catalytic antibody 0.25 μmol, 0.2 mol•L－1 phosphate buffer, pH 8) at 37°C for 10 h, a good conversion (48.7%) and high enantiomeric excess (>99%) could be reached. The kinetic analysis of the catalytic antibody-catalyzed reaction showed that the hydrolysis in the water-miscible organic-solvent system with DMF in buffer solution followed the Michaelis-Menten kinetics. The catalytic efficiency (Kcat/Km) was enhanced to 151.91 L•mmol－1•min－1, twice as large as that for the buffer solution only.