For explaining the reason why the pufferfish can adapt and enrich the Tetrodotoxin,from the angle of molecular genetics,the next introduces the enrichment types and the gene mutation to adapt the Tetrodotoxin,and this is the result of natural selection for a long time evolution.

Three CBM richness model were given basis on the analysis of coalreservoir, some potential targets will be the emphases for the next exploration stage inthe future.

Because silicon and iron separation,desiliconization and iron conservation are the essence of forming rich ore,the thery of passive enrichment and active enrichment is used to explain the formation principle of Anshan-type iron deposit banding lean ore.

Because silicon and iron separation,desiliconization and iron conservation are the essence of forming rich ore,the thery of passive enrichment and active enrichment is used to explain the formation principle of Anshan-type iron deposit banding lean ore.

This paper has studied the application of eluant online generated method, gradient elution and concentrated method to meet the requirement of accurate measurement of super trace chloride and sulfate in water quality of the nuclear power plant, under the condition of using the separate column which has high selection of hydroxide.