In this paper the four indexes of two mussels-Mytilus edulis and Mytilus coruscus were measured. The four indexes were protein, amino acids,unsaturated fatty acids and inorganic elements. The contents of protein and crude fats in Mytilus coruscus were higher than those in Mytilus edulis. The contents of essential amino acids have no difference between the two mussels. Mytilus coruscus is a heavy seafood,as there are much more glutamic acid, glycine and aspartic acid in it. The content of docosahexenoic acid (DHA)in M. coruscus was much more than that of M. edulis. Except for Aluminium and Selenium,the other 12 kinds of elements in M. edulis were higher than those in M. coruscus. The contents of polyunsatu-rated fatty acids(PUFAs) were much more than those of monounsaturated acids (MUFAs)in M. coruscus. There is little difference of the content between PUFAs and MUFAs in M. edulis.

Objective To discuss the clinical value of improved percutaneous lung biopsy under CT guidance.Methods Reviewed the clinical data of 80 cases of improved percutaneous lung biopsy under CT guidance,which were confirmed by surgery or pathology.When took the operation,18 G semi-automatic cutting biopsy needle (made in American Cook's company) was used to improve the ways of positioning scan,two-step method of insert the needle,and the cutting technique of coaxial in each direction.Results All of the 80 patients were successfully completed pathological biopsy,successful rate was 100.0％ (80/80),and diagnosis rate was 98.8％ (79/80),incidence of complication was 10.0 ％ (8/80),all of these patients were recovered after treatment 2-5 d.Conclusion The method of improved percutaneous lung biopsy under CT guidance is safe,effective,simple and practical,which has high successful rate and low complication rate,the generalizability is certain.