To improve the visible light absorption and photocatalytic activity of titanium dioxide nanotube arrays(TONTAs), ZnFe_2O_4(ZFO) nanocrystals were perfused into pristine TONTA pipelines using a novel bias voltageassist...To improve the visible light absorption and photocatalytic activity of titanium dioxide nanotube arrays(TONTAs), ZnFe_2O_4(ZFO) nanocrystals were perfused into pristine TONTA pipelines using a novel bias voltageassisted perfusion method. ZFO nanocrystals were well anchored on the inner walls of the pristine TONTAs when the ZFO suspensions(0.025 mg m L^(-1)) were kept under a60 V bias voltage for 1 h. After annealing at 750 °C for2 h, the heterostructured ZFO/Fe_2 TiO_5(FTO)/TiO_2 composite nanotube arrays were successfully obtained. Furthermore, Fe^(3+)was reduced to Fe^(2+)when solid solution reactions occurred at the interface of ZFO and the pristine TONTAs. Introducing ZFO significantly enhanced thevisible light absorption of the ZFO/FTO/TONTAs relative to that of the annealed TONTAs. The coexistence of type I and staggered type II band alignment in the ZFO/FTO/TONTAs facilitated the separation of photogenerated electrons and holes, thereby improving the efficiency of the ZFO/FTO/TONTAs for photocatalytic degradation of methylene blue when irradiated with simulated sunlight.展开更多
To the Editor:Primary vaginal carcinoma is a rare malignant disease,which represents only approximately 1%to 2%of female genital malignancies.Vaginal adenosis is defined by the presence of metaplastic cervical or endo...To the Editor:Primary vaginal carcinoma is a rare malignant disease,which represents only approximately 1%to 2%of female genital malignancies.Vaginal adenosis is defined by the presence of metaplastic cervical or endometrial epithelium within the vaginal wall,and is associated with a high risk of vaginal carcinoma.In women prenatally exposed to diethylstilboestrol(DES),vaginal adenosis may arise in up to 90%,and these are often associated with vaginal clear cell adenocarcinoma.[1]DES is an orally active non-steroidal estrogen.The Food and Drug Administration began a clinical trial in 1943,and concluded that DES administration is beneficial for preventing premature deliveries and miscarriages.[2]In addition to primary vaginal clear cell carcinoma(PVCCC),in-uterus exposure to DES can also lead to T-shaped uterus anomaly.[3]In the Chinese population,PVCCC is an uncommon malignancy,and there are no reports on the relationship between PVCCC and DES exposure.[4]Given the rarity of PVCCC,it is significant to analyze relevant cases,and provide some valuable information for future clinical and basic studies.Therefore,the present study described ten cases of PVCCC,and summarized the characteristics of the diagnosis,management,and prognosis of these patients.展开更多
基金financially supported by National Nature Science Foundation of China(Grant No.51402247 and 41630646)Sichuan Province Education Department Innovation Team Foundation(16zd1104)+2 种基金Sichuan Province Science Foundation for Young Scientists(No.15zs2111)Open Project of State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials(No.13zxfk11)Doctoral Research Foundation of Southwest University of Science and Technology(No.14zx7119)
文摘To improve the visible light absorption and photocatalytic activity of titanium dioxide nanotube arrays(TONTAs), ZnFe_2O_4(ZFO) nanocrystals were perfused into pristine TONTA pipelines using a novel bias voltageassisted perfusion method. ZFO nanocrystals were well anchored on the inner walls of the pristine TONTAs when the ZFO suspensions(0.025 mg m L^(-1)) were kept under a60 V bias voltage for 1 h. After annealing at 750 °C for2 h, the heterostructured ZFO/Fe_2 TiO_5(FTO)/TiO_2 composite nanotube arrays were successfully obtained. Furthermore, Fe^(3+)was reduced to Fe^(2+)when solid solution reactions occurred at the interface of ZFO and the pristine TONTAs. Introducing ZFO significantly enhanced thevisible light absorption of the ZFO/FTO/TONTAs relative to that of the annealed TONTAs. The coexistence of type I and staggered type II band alignment in the ZFO/FTO/TONTAs facilitated the separation of photogenerated electrons and holes, thereby improving the efficiency of the ZFO/FTO/TONTAs for photocatalytic degradation of methylene blue when irradiated with simulated sunlight.
基金supported by a grant from the National Key R&D Program of China(No.2017YFC1001200)。
文摘To the Editor:Primary vaginal carcinoma is a rare malignant disease,which represents only approximately 1%to 2%of female genital malignancies.Vaginal adenosis is defined by the presence of metaplastic cervical or endometrial epithelium within the vaginal wall,and is associated with a high risk of vaginal carcinoma.In women prenatally exposed to diethylstilboestrol(DES),vaginal adenosis may arise in up to 90%,and these are often associated with vaginal clear cell adenocarcinoma.[1]DES is an orally active non-steroidal estrogen.The Food and Drug Administration began a clinical trial in 1943,and concluded that DES administration is beneficial for preventing premature deliveries and miscarriages.[2]In addition to primary vaginal clear cell carcinoma(PVCCC),in-uterus exposure to DES can also lead to T-shaped uterus anomaly.[3]In the Chinese population,PVCCC is an uncommon malignancy,and there are no reports on the relationship between PVCCC and DES exposure.[4]Given the rarity of PVCCC,it is significant to analyze relevant cases,and provide some valuable information for future clinical and basic studies.Therefore,the present study described ten cases of PVCCC,and summarized the characteristics of the diagnosis,management,and prognosis of these patients.
