The novel BaTiO3/BiFeO3/TiO2 multilayer heterojunction is prepared on a fluorine-doped tinoxide(FTO) substrate by the sol–gel method. The results indicate that the Pt/Ba TiO3/BiFeO3/TiO2/FTO heterojunction exhibits s...The novel BaTiO3/BiFeO3/TiO2 multilayer heterojunction is prepared on a fluorine-doped tinoxide(FTO) substrate by the sol–gel method. The results indicate that the Pt/Ba TiO3/BiFeO3/TiO2/FTO heterojunction exhibits stable bipolar resistive switching characteristic, good retention performance, and reversal characteristic. Under different pulse voltages and light fields, four stable resistance states can also be realized. The analysis shows that the main conduction mechanism of the resistive switching characteristic of the heterojunction is space charge limited current(SCLC) effect. After the comprehensive analysis of the band diagram and the P–E ferroelectric property of the multilayer heterojunction, we can deduce that the SCLC is formed by the effect of the oxygen vacancy which is controlled by ferroelectric polarizationmodulated change of interfacial barrier. And the effective photo-generated carrier also plays a regulatory role in resistance state(RS), which is formed by the double ferroelectric layer Ba TiO3/BiFeO3 under different light fields. This research is of potential application values for developing the multi-state non-volatile resistance random access memory(RRAM) devices based on ferroelectric materials.展开更多
Background: Follicular variant papillary thyroid carcinoma (FVPTC) is the most common subset of papillary carcinoma. Lymph-node metastasis (LNM) is one of the main predictors of survival in PTC patients, but we found ...Background: Follicular variant papillary thyroid carcinoma (FVPTC) is the most common subset of papillary carcinoma. Lymph-node metastasis (LNM) is one of the main predictors of survival in PTC patients, but we found few data related to the correlation between LNM and FVPTC. We therefore aimed to elucidate the relationship between LNM and survival in patients with FVPTC. Methods: Logistic regression models were used to determine the factors associated with LNM. The Cox proportional-hazards model was applied to assess the association between LNM and disease-specific mortality. Kaplan-Meier survival analysis and the log-rank test were used to estimate the disease-specific survival rates in patients with and without LNM. Results: In total, 1418 FVPTC patients were identified. The multivariate logistic regression model showed that age, female sex, being married, tumor size > 4cm and extrathyroidal extension and radiation were predictors of LNM. The multivariate Cox regression model showed that age, multifocality and radiation were risk factors of diseasespecific mortality. Especially, LNM (p=0.271) did not independently predict disease-specific mortality. Kaplan-Meier survival analysis and the log-rank method also showed that LNM did not impact survival in FVPTC (p=0.235). Conclusion: Using data in the SEER database from 2004 to 2014, and after multivariate model correction, we found that age, multifocality and radiation were strongly related to disease-specific mortality. It is worth noting that LNM does not impact the survival of FVPTC patients.展开更多
Background:Data on the incidence,mortality,and other burden of oral cancer as well as their secular trends are necessary to provide policy-makers with the information needed to allocate resources appropriately.The pur...Background:Data on the incidence,mortality,and other burden of oral cancer as well as their secular trends are necessary to provide policy-makers with the information needed to allocate resources appropriately.The purpose of this study was to use the Global Burden of Disease(GBD)2017 results to estimate the incidence,mortality,and disability-adjusted life years(DALYs)for oral cancer from 1990 to 2017.Methods:We collected detailed data on oral cancer from 1990 to 2017 from the GBD 2017.The global incidence,mortality,and DALYs attributable to oral cancer as well as the corresponding age-standardized rates(ASRs)were calculated.The estimated annual percentage changes in the ASRs of incidence(ASRI)and mortality(ASRM)and age-standardized DALYs of oral cancer were also calculated according to regions and countries to quantify the secular trends in these rates.Results:We tracked the incidence,mortality,and DALYs of oral cancer in 195 countries/territories over 28 years.Globally,the incidence,mortality,and DALYs of oral cancer increased by about 1.0-fold from 1990 to 2017.The ASRI of oral cancer showed a similar trend,increasing from 4.41 to 4.84 per 100,000 person-years during the study period.The ASRM remained approximately stable at about 2.4 per 100,000 from 1990 to 2017,as did the age-standardized DALYs,at about 64.0 per 100,000 person-years.ASRI was highest in Pakistan(27.03/100,000,95%CI=22.13-32.75/100,000),followed by Taiwan China,and lowest in Iraq(0.96/100,000,95%CI=0.86-1.06/100,000).ASRM was highest in Pakistan(16.85/100,000,95%CI=13.92-20.17/100,000)and lowest in Kuwait(0.51/100,000,95%CI=0.45-0.58/100,000).Conclusions:The ASRI of oral cancer has increased slightly worldwide,while the ASRM and age-standardized DALY have remained stable.However,these characteristics vary between countries,suggesting that current prevention strategies should be reoriented,and much more targeted and specific strategies should be established in some countries to forestall the increase in oral cancer.展开更多
基金Project supported by the Scientific Research Program of Hunan Provincial Education Department,China(Grant No.18C0232)the International Cooperative Extension Program of Changsha University of Science and Technology,China(Grant No.2019IC35)
文摘The novel BaTiO3/BiFeO3/TiO2 multilayer heterojunction is prepared on a fluorine-doped tinoxide(FTO) substrate by the sol–gel method. The results indicate that the Pt/Ba TiO3/BiFeO3/TiO2/FTO heterojunction exhibits stable bipolar resistive switching characteristic, good retention performance, and reversal characteristic. Under different pulse voltages and light fields, four stable resistance states can also be realized. The analysis shows that the main conduction mechanism of the resistive switching characteristic of the heterojunction is space charge limited current(SCLC) effect. After the comprehensive analysis of the band diagram and the P–E ferroelectric property of the multilayer heterojunction, we can deduce that the SCLC is formed by the effect of the oxygen vacancy which is controlled by ferroelectric polarizationmodulated change of interfacial barrier. And the effective photo-generated carrier also plays a regulatory role in resistance state(RS), which is formed by the double ferroelectric layer Ba TiO3/BiFeO3 under different light fields. This research is of potential application values for developing the multi-state non-volatile resistance random access memory(RRAM) devices based on ferroelectric materials.
基金National Social Science Foundation of China (No.16BGL183)Natural Science Foundation of Shaanxi Province (No.2015JM8415)+2 种基金Fundamental Research Funds for the Central Universities of China (No.2011jdhz55)Clinical Research Award of the First Affiliated Hospital of Xi’an Jiaotong University of China (No.XJTU1AF-CRF-2016-021)Research Fund of Health Bureau of Xi’an (No. QFO1330).
文摘Background: Follicular variant papillary thyroid carcinoma (FVPTC) is the most common subset of papillary carcinoma. Lymph-node metastasis (LNM) is one of the main predictors of survival in PTC patients, but we found few data related to the correlation between LNM and FVPTC. We therefore aimed to elucidate the relationship between LNM and survival in patients with FVPTC. Methods: Logistic regression models were used to determine the factors associated with LNM. The Cox proportional-hazards model was applied to assess the association between LNM and disease-specific mortality. Kaplan-Meier survival analysis and the log-rank test were used to estimate the disease-specific survival rates in patients with and without LNM. Results: In total, 1418 FVPTC patients were identified. The multivariate logistic regression model showed that age, female sex, being married, tumor size > 4cm and extrathyroidal extension and radiation were predictors of LNM. The multivariate Cox regression model showed that age, multifocality and radiation were risk factors of diseasespecific mortality. Especially, LNM (p=0.271) did not independently predict disease-specific mortality. Kaplan-Meier survival analysis and the log-rank method also showed that LNM did not impact survival in FVPTC (p=0.235). Conclusion: Using data in the SEER database from 2004 to 2014, and after multivariate model correction, we found that age, multifocality and radiation were strongly related to disease-specific mortality. It is worth noting that LNM does not impact the survival of FVPTC patients.
基金This study was supported by The Interdisciplinary Program of Shanghai Jiao Tong University(ZH2018QNA08)(Zhang Zhiyuan)Academician Workstation Scientific Research Fund(2019)+2 种基金The SHIPM-mu fund No.JC201902 from the Shanghai Institute of Precision Medicine,Ninth People’s Hospital Shanghai Jiao Tong University School of MedicineThe Shanghai Anticancer Association Eyas Project(SACA-CY1B06)the National Social Science Foundation of China(No.16BGL183).
文摘Background:Data on the incidence,mortality,and other burden of oral cancer as well as their secular trends are necessary to provide policy-makers with the information needed to allocate resources appropriately.The purpose of this study was to use the Global Burden of Disease(GBD)2017 results to estimate the incidence,mortality,and disability-adjusted life years(DALYs)for oral cancer from 1990 to 2017.Methods:We collected detailed data on oral cancer from 1990 to 2017 from the GBD 2017.The global incidence,mortality,and DALYs attributable to oral cancer as well as the corresponding age-standardized rates(ASRs)were calculated.The estimated annual percentage changes in the ASRs of incidence(ASRI)and mortality(ASRM)and age-standardized DALYs of oral cancer were also calculated according to regions and countries to quantify the secular trends in these rates.Results:We tracked the incidence,mortality,and DALYs of oral cancer in 195 countries/territories over 28 years.Globally,the incidence,mortality,and DALYs of oral cancer increased by about 1.0-fold from 1990 to 2017.The ASRI of oral cancer showed a similar trend,increasing from 4.41 to 4.84 per 100,000 person-years during the study period.The ASRM remained approximately stable at about 2.4 per 100,000 from 1990 to 2017,as did the age-standardized DALYs,at about 64.0 per 100,000 person-years.ASRI was highest in Pakistan(27.03/100,000,95%CI=22.13-32.75/100,000),followed by Taiwan China,and lowest in Iraq(0.96/100,000,95%CI=0.86-1.06/100,000).ASRM was highest in Pakistan(16.85/100,000,95%CI=13.92-20.17/100,000)and lowest in Kuwait(0.51/100,000,95%CI=0.45-0.58/100,000).Conclusions:The ASRI of oral cancer has increased slightly worldwide,while the ASRM and age-standardized DALY have remained stable.However,these characteristics vary between countries,suggesting that current prevention strategies should be reoriented,and much more targeted and specific strategies should be established in some countries to forestall the increase in oral cancer.
