Time-dependent crosstalk effects for image sensors with different isolation structures

Photo-generated carriers may diffuse into the adjacent cells to form the electrical crosstalk, which is especially no- ticeable after the pixel cell size has been scaled down. The electrical crosstalk strongly depends on the structure and electrical properties of the photosensitive areas. In this work, time-dependent crosstalk effects considering different isola- tion structures are investigated. According to the different depths of photo-diode （PD） and isolation structure, the transport of photo-generated carriers is analyzed with different regions in the pixel cell. The evaluation of crosstalk is influenced by exposure time. Crosstalk can be suppressed by reducing the exposure time. However, the sensitivity and dynamic range of the image sensor need to be considered as well.

Impact of Taurine on the proliferation and apoptosis of human cervical carcinoma cells and its mechanism

Background:Cervical cancer has the fourth highest incidence and mortality rate of all cancers in women worldwide;让seriously harms their physical and mental health.The aim of this study was to observe the roles and preliminary mechanism of Taurine(Tau)-induced apoptosis in cervical cancer cells.Methods:Cells from the human cervical cancer cell line SiHa were transfected with the recombinant plasmid pEGFP-N1-MST1(mammalian sterile 20-like kinase 1);then,the cell proliferation activity was analyzed by the MTT assay,cell apoptosis by flow cytometry,and the related protein levels by Western blotting.Results:Tau inhibited the proliferation of SiHa cells and induced apoptosis in these cells(the apoptotic rate was 21.95%in the Tau 160 mmol/L group and 30%in the Tau 320 mmol/L group),upregulated the expression of the MST1(control,0.53;Tau 40-320 mmol/L groups,0.84-1.45)and Bax(control,0.45;Tau 40-320 mmol/L groups,0.64-1.51)proteins(P<0.01),and downregulated the expression of Bcl-2(control,1.28,Tau 40-320 mmol/L groups,0.93-0.47)(P<0.01).The overexpression of MST1 promoted the apoptosis of SiHa cells,enhanced the apoptosis-inductive effects of Tau(P<0.01),upregulated the expression of the proapoptotic proteins p73,p53,PUMA(p53 upregulated modulator of apoptosis),and caspase-3,and promoted the phosphorylation of YAP(Yes-associated protein).Conclusions:Tau inhibited the proliferation and induced the apoptosis of cervical cancer SiHa cells.The MST1 protein plays an important role in the Tau-induced apoptosis of cervical cancer cells.