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Objective:To evaluate the toxic effect of 3 different gingival retraction cords.Methods:DMEMextraction of DL-adren-aline HCl,aluminium sulphate and non-drug retraction cords with the extraction time of 5,10,15 and 30 min were respectively pre-pared and were used to culture human gingival fibroblasts(HGFs)in vitro respectively.Cell proliferation was tested by MTT assay. Cell apoptosis was examined by Annexin/PI method.Results:The 3 gingival retraction cord extractions inhibited the roliferation,pro-moted the apoptosis of HGFs(P <0.05),the effects were related to the extraction time.Conclusion:The 3 retraction cords have time-dependant cytotoxity.
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Objective To discuss the application value of the capillary electrophoresis in detecting the glycosylation hemoglobin (HbA1c)level.Methods By utilizing the uncoated fused silica capillary column(30 cm in length and 25 μm in diameter)and the specific adsorption peak,the HbA1c levels in the healthy people,patients with diabetes mellitus(DM)and high risk people were de-tected by the photodiode array(PDA)method at the wavelength of 415 nm.During the research process,the precision and accuracy were perfomred the accuracy analysis.Results HbA1c could be effectively separated from non-HbA1c,with a sharp peak.And the relative quantity of HbA1c could be determined.Conclusion The capillary electrophoresis is characterized by specificity,high precision,and high accuracy.Therefore,it should be widely applied in clinic.