1. The sensibilization due to extraction preconcentration on dropping mercury electrode are discussed.

2. Methods To analyse the conditions of the infected regions, distribution, etiology and drug sensibilization in all the 73 cases of hospital infection.

3. The results are helpful to develop immunodetection assays for detection A1a acidic peptide and research its sensibilization mechanism.

4. The surface oxygen inhibition could be effectively restrained through the sensibilization system of the cationic photo-initiator DPI· BF_4.

5. It has less side effect and strong actions on sensibilization of radiotherapy and killing tumor.