Silver - coated carbonyl iron powder was prepared by using electroless plating method.用化学镀法,甲醛为还原剂,制备镀银羰基铁粉.The p - chlorophenyl isocyanate is synthesised by carbonyl chloride and p - chloroaniline . The yield is 90 %.采用...
Is the Pearl River Delta economic circle in the oasis.也是珠江三角洲经济圈中的绿洲.Computer simulation of water movement and heat transfer in groundwater - soil - vegetation - atmosphere continuum at oasis - desert ecotone.绿洲 - 荒漠交错带潜...
用高效液相色谱法测定麦白霉素片中麦迪霉素A含量.Objective : To establish a method of determination of midecamycin A 1 in meleumyin tablets.目的建立比浊法测定麦白霉素制剂效价的方法.OBJECTIVE To establish a turbidimetric method for the content determination of meleu...