coli) system under certain conditions, establish purification technology of melittin-~(88)ArgIL-2 chimeric protein, obtain the melittin-~(88)ArgIL-2 with high purity and study the biological activities of it in vitro.

This dissertation includes four parts: summary of the related literatures; studies on the extraction and purification technology of Fangfeng chromone fraction; researches on the chemical constituents;establishment of the quanlity controlling methods.

Results:The best Purification technology of Sugarcane Wax is that sulphuric acid pH is 3-4,one eighth active carbon decolorize,to dissolve by alcohol and filter,assemble precipitation to get Sugarcane Wax.

The optimal purification method was evaluated by the main efficacy, the solid content, and the effective components content.

Purification techniques and blood enrichment effect of Siwu tang;

Studies on purification process of steroidal saponins from Paris polyphylla

Harvest medium was collected and purified with a three-step purification process[CD12]ion-exchanger, reverse phase and molecular sieve chromatography.

Because CF4 is difficult to be separated from NF3 by general method,the paper provided a new purification process—low temperature extractive distillation purification to solve the problem.