采用酸溶碱沉法对三批来源不同的北豆根药材分别进行提取分离，所得有效部位采用冻干技术制成粉针剂。
The effective position are extracted and then they are prepared into powder injection by the technology of freezing.
方法：采用系统溶剂法提取，硅胶干柱层析法进行化学成分分离。
Method: Systematic solvent method is used to extract and silica gel dry column sheet gradation was used to separate the chemical composition.
指出炼油厂采用膜分离技术回收氢及用催化裂化干气中的乙烯生产苯乙烯，是合理利用石油副产物的有效途径。
Recovery of ethylene from dry gas and utilization of ethyl benzene are described, and it is pointed out that recovery of hydrogen by the membrane separation and production of styr...
指出炼油厂采用膜分离技术回收氢及用催化裂化干气中的乙烯生产苯乙烯，是合理利用石油副产物的有效途径。
Recovery of ethylene from dry gas and utilization of ethyl benzene are described, and it is pointed out that recovery of hydrogen by the membrane separation and production of styr...
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