a kilometre and a half of bitumen一公里半的柏油路面contain bitumen含沥青The irradiation stability of bitumen and bituminized producthas been investigated.本文研究了沥青及沥青固化产品的辐照稳定性.The article introduced the category of natural bitumen an...
应提倡温和碱性洗脱剂方法的探索.The development of Methods: That involve moderately alkaline eluents should be encouraged.脱脂奶粉是廉价的蛋白质洗脱剂.Nonfat dry milk is an inexpensive proteinaceous eluent.早期纯化这类抗体是用稀酸或稀碱洗脱.In early purifications of ...