18% by using a solution of NaOH with 40g/L consistence;in the combination methods,the combination of hot water method and alkali method in succession can get more crude an.

Study of extracting gold from copper bearing gold concentrate by roasting aqueous leaching cyaniding process;

Introduction the super a water immerses principle, equipments, technique parameter etc.

By using water immersion focusing method in an ultrasonic C-scan inspection system,the quality of Cu/steel surfacing weld was evaluated.

Allelopathic effect of aqueous extract from alfalfa leaf on test weeds;

and the results showed that aqueous extracts of stem,leaf and flower inhibited the root growth and shoot length of cucumber and this increased became strong as the concentration of the extraction increased,the root growth and shoot length of queous extracts from leaf and flower can be inhibited up to 100.