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| 1 | Low-dose real-time X-ray imaging with nontoxic double perovskite scintillators显示文摘X-rays are widely used in probing inside information nondestructively,enabling broad applications in the medical radiography and electronic industries.X-ray imaging based on emerging lead halide perovskite scintillators has received extensive attention recently.However,the strong self-absorption,relatively low light yield and lead toxicity of these perovskites restrict their practical applications.Here,we report a series of nontoxic double-perovskite scintillators of Cs_(2)Ag_(0.6)Na_(0.4)In_(1-y)Bi_(y)Cl_(6).By controlling the content of the heavy atom Bi^(3+),the X-ray absorption coefficient,radiative emission efficiency,light yield and light decay were manipulated to maximise the scintillator performance.A light yield of up to 39,000±7000 photons/MeV for Cs_(2)Ag_(0.6)Na_(0.4)In_(0.85)Bi_(0.15)Cl_(6) was obtained,which is much higher than that for the previously reported lead halide perovskite colloidal CsPbBr_(3)(21,000 photons/MeV).The large Stokes shift between the radioluminescence(RL)and absorption spectra benefiting from self-trapped excitons(STEs)led to a negligible selfabsorption effect.Given the high light output and fast light decay of this scintillator,static X-ray imaging was attained under an extremely low dose of ∼1μGy_(air),and dynamic X-ray imaging of finger bending without a ghosting effect was demonstrated under a low-dose rate of 47.2μGy_(air) s^(−1).After thermal treatment at 85℃ for 50 h followed by X-ray irradiation for 50 h in ambient air,the scintillator performance in terms of the RL intensity and X-ray image quality remained almost unchanged.Our results shed light on exploring highly competitive scintillators beyond the scope of lead halide perovskites,not only for avoiding toxicity but also for better performance. | Wenjuan Zhu Wenbo Ma Yirong Su Zeng Chen Xinya Chen Yaoguang Ma Lizhong Bai Wenge Xiao Tianyu Liu Haiming Zhu Xiaofeng Liu Huafeng Liu Xu Liu Yang(Michael)Yang | 2020 | Light(Science & Applications)2020，9，1： | 9 |
| 2 | Development and Application of a Novel Functional Marker for Fragrance in Rice显示文摘Fragrant rice is favored worldwide by consumers and rice breeders,due to its full aroma and high nutritional value.Loss of function of the betaine aldehyde dehydrogenase gene(OsBADH2)leads to aroma in rice.Our previous sequencing results showed that fragrant rice Chuan 7 belongs to badh2-E14 type,with a 1 bp insertion mutation in exon 14(Sun et al,2021),and this allele mutation is mainly distributed in Nepal and India(Kovach et al,2009). | SUN Pingyong ZHANG Wuhan ZHANG Li SHU Fu HE Qiang XU Na PENG Zhirong ZENG Jia FANG Pengpeng DENG Huafeng | 2023 | Rice science2023，30，3： | 0 |
| 3 | Weipixiao ameliorates gastric precancerous lesions in a rat's model by regulating GSK3β and C-myc显示文摘OBJECTIVE: To investigate the mechanism underlying the action of Weipixiao(WPX) in a rat's model with ameliorating gastric precancerous lesions(GPL).METHODS: HPLC analysis was performed to identify the chemical constituents of WPX preparation.Sprague-Dawley rats were randomly assigned into control group, model group, vitacoenzyme group,high-dose WPX group(H-WPX), medium-dose WPX group(M-WPX) and low-dose WPX group(L-WPX).After modeling, the treated rats were administrated WPX or vitacoenzyme intragastrically for consecutive 10 weeks. Gene and protein expressions ofGSK3β, C-myc, Cylin E were evaluated by quantitative real-time reverse transcription-polymerase chain reaction(RT-qPCR) and immunohistochemistry, respectively.RESULTS: WPX could efficiently attenuate the pathological alterations of 'non-progressive GPL' in rats.As expected, mRNA and protein levels of C-myc and Cylin E were up-regulated in model rats, while GSK3β expression down-regulated(P < 0.01). WPX treatment, especially at low dose, could significantly down-regulate the m RNA as well as protein levels of C-myc, and could lead to remarkable up-regulation of mRNA and protein levels of GSK3β in GPL rats(P < 0.05). However, no significant changes were observed in WPX-treated rats.CONCLUSION: Our findings suggested that WPX-mediated attenuation of GPL pathological alterations might be due to its regulatory effect on the expressions of GSK3β and C-myc, and on the dysregulation of Wnt/GSK3β pathway. | Zeng Jinhao Pan Huafeng Guo Jing Gong Daoyin Cai Tiantian Chen Xiaodong Zhang Yi You Fengming Chen Longhui Zhao Ziming Liang Chao | 2018 | Journal of Traditional Chinese Medicine2018，38，5： | 0 |
| 4 | Prediction of severe preeclampsia in machine learning显示文摘This study aimed to find out the blood data characteristics of patients and explore the correlation between severe preeclampsia and blood index value.Provide assistance for the early attention direction of severe preeclampsia diagnosis and treatment.19,653 pregnant women presenting to the West China Second University Hospital,Sichuan University from January 2017 to April 2019.After screening,a total of 248 patients,124 severe preeclampsia cases,and 124 controls were selected for this study.Forty-three blood examination variables were obtained from routine blood work,hepatic,renal and coagulation function examination.Light gradient boosting machine(light GBM),decision tree and random forest were used for date diving.We randomly divided 35%of the original data as a testing set to conduct internal validation of the performance of the prediction model.The area under receiver operating characteristic curve(AUC)was used as the main score to compare the three methods.Finally,a binary classification light GBM model based on aspartate aminotransferase,direct bilirubin and activated partial thromboplastin time ratio can predict severe preeclampsia with sensitivity of 88.37%,specificity of 77.27%,AUC of 89.74%and positive predictive value of 65.96%.We believe relevant quantifiable indicators can establish an effective prediction model,which can provide guidance for early detection and prevention of severe preeclampsia. | Xinyuan Zhang Yu Chen Stephen Salerno Yi Li Libin Zhou Xiaoxi Zeng Huafeng Li | 2022 | Medicine in Novel Technology and Devices2022，，3： | 0 |
| 5 | Forest Tenure Transfer and Assessment of Dayi County显示文摘According to analysis of basic situations and achievements of forest tenure transfer in Dayi County,this paper points out problems in the assessment of forest tenure transfer in Dayi County,including few specialized organizations and personnel of forest tenure transfer value assessment,outmoded forest tenure assessment operating specifications,low charges of forest tenure assessment,and weak awareness of forest tenure assessment. In line with these problems,it presents ideas of increasing specialized forest tenure assessment organization,strengthening training of specialized forest tenure assessment personnel,promoting guiding price of forest tenure transfer,and energetically developing forest tenure transfer market. It is hoped to promote development of forest tenure transfer in Dayi County. | Qinghao GAO Huafeng ZENG Ying NIE | 2013 | Asian Agricultural Research2013，5，7： | 0 |
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