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Gou R, Zhou S, Shi C, Sun Q, Huang Z, Zhao J, Xiao Y, Lei S, Cheng B. Control of positive and negative photo- and thermal-responses in a single PbI 2@CH 3NH 3PbI 3 micro/nanowire-based device for real-time sensing, nonvolatile memory, and logic operation. Mater Horiz 2024; 11:2258-2270. [PMID: 38439663 DOI: 10.1039/d4mh00070f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2024]
Abstract
CH3NH3PbI3 has shown great potential for photodetectors and photovoltaic devices due to its excellent positive response to visible light. However, its real-time response characteristics hinder its application in optical memory and logic operation; moreover, the presence of excessive PbI2 is a double-edged sword. Herein, we constructed a dual-terminal device using a single CH3NH3PbI3 micro/nanowire with two Ag electrodes, and then in situ introduced PbI2 quantum dots (QDs) as hole trap centres by thermal decomposition at 160 °C. An anomalous negative photoconductivity (NPC) effect for sub-bandgap light below the PbI2 bandgap is obtained. Importantly, an electrically erasable nonvolatile photomemory can be realized. Furthermore, the device also exhibits an abnormal positive thermal resistance (PTR)-related thermomemory effect, and the thermal-induced high-resistance state (HRS) can be erased by a large bias or an illumination of 365 nm super-bandgap UV light. Additionally, logical "OR" gate operations are achieved through a combination of 650 nm sub-bandgap light and a 70 °C temperature-induced HRS, as well as a large bias and 365 nm super-bandgap light-triggered low-resistance state. These effects are attributed to the excitation and injection of holes in QDs and structural defect traps. This multifunctional device, integrating real-time sensing, nonvolatile memory, and logical operation, holds significant potential for novel electronic and optoelectronic applications.
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Affiliation(s)
- Runna Gou
- School of Physics and Materials Science, Nanchang University, Jiangxi 330031, P. R. China.
- School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, P. R. China
| | - Shuanfu Zhou
- School of Physics and Materials Science, Nanchang University, Jiangxi 330031, P. R. China.
| | - Cencen Shi
- Institute for Advanced Study, Nanchang University, Jiangxi 330031, P. R. China
| | - Qinghua Sun
- School of Physics and Materials Science, Nanchang University, Jiangxi 330031, P. R. China.
| | - Zhikang Huang
- Institute for Advanced Study, Nanchang University, Jiangxi 330031, P. R. China
| | - Jie Zhao
- School of Physics and Materials Science, Nanchang University, Jiangxi 330031, P. R. China.
| | - Yanhe Xiao
- School of Physics and Materials Science, Nanchang University, Jiangxi 330031, P. R. China.
| | - Shuijin Lei
- School of Physics and Materials Science, Nanchang University, Jiangxi 330031, P. R. China.
| | - Baochang Cheng
- School of Physics and Materials Science, Nanchang University, Jiangxi 330031, P. R. China.
- Institute for Advanced Study, Nanchang University, Jiangxi 330031, P. R. China
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Li Z, Lei S, Zhou S, Zhang Z. Rheumatoid arthritis with chylothorax: a case report. Scand J Rheumatol 2024:1-2. [PMID: 38686821 DOI: 10.1080/03009742.2024.2342053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Accepted: 04/09/2024] [Indexed: 05/02/2024]
Affiliation(s)
- Z Li
- Department of Rheumatology, Gansu Provincial People's Hospital, Lanzhou, People's Republic of China
| | - S Lei
- Department of Rheumatology, Gansu Provincial People's Hospital, Lanzhou, People's Republic of China
| | - S Zhou
- Department of Rheumatology, Gansu Provincial People's Hospital, Lanzhou, People's Republic of China
| | - Z Zhang
- Department of Rheumatology, Gansu Provincial People's Hospital, Lanzhou, People's Republic of China
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Ke X, Tang C, Xiong R, Xiao Y, Cheng B, Lei S. Three-Dimensional Multihierarchical Hexagonal/Cubic ZnIn 2S 4 S-Scheme Heterophase Junction for Superior Photocatalysis. Inorg Chem 2024; 63:2157-2173. [PMID: 38206809 DOI: 10.1021/acs.inorgchem.3c04102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
It is an important strategy to design composite materials with a special microstructure and a tunable electronic structure through structural compatibility. In this work, a novel hexagonal/cubic ZnIn2S4 polymorphic heterophase junction with a three-dimensional multihierarchical structure is successfully constructed by in situ growth of hexagonal ZnIn2S4 nanosheets on the surface of cubic ZnIn2S4 flower-like microspheres prepared by topological chemical synthesis. On the one hand, the multihierarchical architecture provides large specific surface area, abundant active sites, and excellent light trapping capability. On the other hand, the construction of a direct S-scheme heterophase junction enables the formation of a special charge-transfer channel under the force of a built-in electric field, which not only improves the separation efficiency of carriers but also ensures the stronger reaction activity of charges. The prepared ZnIn2S4 heterophase junction composite photocatalyst exhibits greatly boosted photocatalytic efficiency in rhodamine B degradation, hexavalent chromium reduction, and water splitting for hydrogen production, which are 12.3, 6.5, and 3.1 times higher than that of pure hexagonal ZnIn2S4 and 8.1, 5.1, and 2.3 times higher than that of pure cubic ZnIn2S4, respectively, demonstrating its significant potential for applications in energy and environmental fields.
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Affiliation(s)
- Xiaoxue Ke
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, China
| | - Changcun Tang
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, China
| | - Renzhi Xiong
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, China
| | - Yanhe Xiao
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, China
| | - Baochang Cheng
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, China
| | - Shuijin Lei
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, China
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Wu L, Ying J, Jiang Z, Zhang L, Cai Y, Zhou C, Xu Y, Lei S. Risk factors in ICU patients with initial acquisition of carbapenemase-resistant Klebsiella Pneumoniae. Int J Tuberc Lung Dis 2023; 27:899-905. [PMID: 38042974 DOI: 10.5588/ijtld.23.0043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2023] Open
Abstract
OBJECTIVE: To identify the risk factors associated with antimicrobial use on the initial acquisition of carbapenem-resistant Klebsiella pneumoniae (CRKP) in elderly intensive care unit (ICU) patients.METHODS: Respiratory secretion, blood, urine, anal swab and peritoneal drainage samples from all elderly patients with non-colonised CRKP who had been hospitalised from January 2021 to December 2022 were collected, and screened for CRKP colonisation using surveillance culture at the time of the first ICU admission and weekly thereafter in Zhejiang Provincial Hospital of Chinese Medicine, Zhejiang, China. Cumulative antibiotic variables included duration of antibiotic use, total amount of antimicrobials received in grams, total antibiotic consumption (defined daily dose) and the types of antimicrobial exposure. A time-dependent model based on Cox regression analysis was used to investigate the effect of each variable on the initial acquisition of CRKP infection or colonisation.RESULTS: Of 214 patients, 44 were infected or had CRKP colonies and death rate was 34.1%. males were the risk factor for acquiring CRKP in culture (HR 2.12, 95% CI 1.06-4.21; P = 0.033). It is notable that the hazard of acquiring CRKP increased by 9% with every single-point increase in the APACHE II score (HR 1.09, 95% CI 1.01-1.18; P = 0.025). The hazard of acquiring CRKP doubled when carbapenems were administered (HR 1.81, 95% CI 1.42-2.30; P < 0.001), In contrast, exposure to quinolone antimicrobials had a smaller effect on acquiring CRKP (HR 1.07; 95% CI 1.01-1.14; P = 0.024).CONCLUSION: This study found that male sex, APACHE II score and exposure to quinolones and carbapenems were independent risk factors for acquiring CRKP.
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Affiliation(s)
- L Wu
- Departments of Respiratory and Critical Care Medicine, and
| | - J Ying
- Departments of Obstetrics and Gynecology, The Affiliated Cangnan Hospital of Wenzhou Medical University, Cangnan, Zhejiang
| | - Z Jiang
- Department of Emergency Medicine, The Affiliated Hospital of Hangzhou Normal University, Hangzhou Normal University, Hangzhou, Zhejiang
| | - L Zhang
- Departments of Respiratory and Critical Care Medicine, and
| | - Y Cai
- Departments of Respiratory and Critical Care Medicine, and
| | - C Zhou
- Departments of Respiratory and Critical Care Medicine, and
| | - Y Xu
- Department of Cardiology, Hangzhou Ninth People's Hospital, Hangzhou, Zhejiang
| | - S Lei
- Intensive Care Unit, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
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Gou R, Shi C, Zhou S, Huang Z, Ouyang Z, He S, Zhao J, Xiao Y, Lei S, Cheng B. Self-Powered Photodetector Based on Ag/CH 3NH 3PbI 3/C Asymmetric Dual-Terminal Device. ACS Appl Mater Interfaces 2023; 15:54863-54874. [PMID: 37966314 DOI: 10.1021/acsami.3c13839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
CH3NH3PbI3 is capable of exhibiting a superior photoresponse to visible light, but its self-powered devices are typically formed through p-n junctions. In this study, we fabricated a Ag/CH3NH3PbI3/C dual-terminal asymmetric electrode device using a single CH3NH3PbI3 perovskite micro/nanowire, enabling both the photoresponse and self-powered characteristics of CH3NH3PbI3 to visible light. Compared with traditional p-n junction devices, this simple device demonstrates enhanced interface photovoltaic effects by optimizing the combination of the Ag electrode with CH3NH3PbI3, resulting in superior self-powered characteristics. Under low bias voltage, the device achieves a significant on/off ratio of 103, with superior sensitivity and responsivity as well as a maximum rectification ratio of about 12. The photogenerated voltage and current reach approximately 0.8 V and 2 nA, respectively. This simple, compact, and self-powered asymmetric device exhibits great potential for applications in self-powered optoelectronics and wearable devices. This research provides a promising approach for recognizing and utilizing surface state effects in single nanoscale structures.
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Affiliation(s)
- Runna Gou
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, P. R. China
- School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, P. R. China
| | - Cencen Shi
- Nanoscale Science and Technology Laboratory, Institute for Advanced Study, Nanchang University, Nanchang 330031, P. R. China
| | - Shuanfu Zhou
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, P. R. China
| | - Zhikang Huang
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, P. R. China
| | - Zhiyong Ouyang
- Nanoscale Science and Technology Laboratory, Institute for Advanced Study, Nanchang University, Nanchang 330031, P. R. China
- School of Materials and Energy, Jiangxi Science and Technology Normal University, Nanchang 330038, P. R. China
| | - Song He
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, P. R. China
| | - Jie Zhao
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, P. R. China
| | - Yanhe Xiao
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, P. R. China
| | - Shuijin Lei
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, P. R. China
| | - Baochang Cheng
- School of Physics and Materials Science, Nanchang University, Nanchang 330031, P. R. China
- Nanoscale Science and Technology Laboratory, Institute for Advanced Study, Nanchang University, Nanchang 330031, P. R. China
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Xia GL, Xu X, You XB, Wang X, Feng DD, Lei S, Jiang RL. Efficacy and nephrotoxicity of polymyxin B in elderly patients with carbapenem resistant bacterial infection. Ann Clin Microbiol Antimicrob 2023; 22:101. [PMID: 37968642 PMCID: PMC10652515 DOI: 10.1186/s12941-023-00647-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 10/24/2023] [Indexed: 11/17/2023] Open
Abstract
BACKGROUND To study the efficacy and nephrotoxicity of polymyxin B in the treatment of elderly patients with carbapenem-resistant organism (CRO) infection. METHODS The clinical and microbiological data of patients with CRO-infected sepsis treated with polymyxin B were retrospectively analyzed. The effective rate, bacterial clearance, incidence and recovery rate of acute renal injury (AKI) and prognosis-related indicators in AKI at different stages were compared. RESULTS The effective rate of 215 elderly patients with CRO infection treated with polymyxin was 50.7%. The total bacterial clearance rate was 44.2%, the total incidence of AKI was 37.2%, the recovery rate of AKI was 35%, and the incidence range of polymyxin B-related AKI was 10.2-37.2%. Logistic multivariate regression analysis showed that the predictors of AKI in elderly patients were high APACHE II score, long duration of polymyxin, chronic renal insufficiency and ineffective outcome; the ROC curve showed that the cutoff value for predicting AKI was a serum creatinine concentration of 73 mmol/L before polymyxin B use, and the AUC was 0.931. CONCLUSIONS Rational use of polymyxin B is safe and effective in elderly patients with CRO infection, and its effective outcome can improve the recovery rate of AKI.
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Affiliation(s)
- G L Xia
- Department of Intensive Care Unit, The First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Traditional Chinese Medicine), NO.54 Youdian Road, Hangzhou, 310006, China
| | - X Xu
- The First School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - X B You
- The Third Affiliated Hospital of Zhejiang, Chinese Medical University, Hangzhou, 310009, China
| | - X Wang
- Department of Intensive Care Unit, The First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Traditional Chinese Medicine), NO.54 Youdian Road, Hangzhou, 310006, China
| | - D D Feng
- Department of Intensive Care Unit, The First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Traditional Chinese Medicine), NO.54 Youdian Road, Hangzhou, 310006, China
| | - S Lei
- Department of Intensive Care Unit, The First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Traditional Chinese Medicine), NO.54 Youdian Road, Hangzhou, 310006, China
| | - R L Jiang
- Department of Intensive Care Unit, The First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Traditional Chinese Medicine), NO.54 Youdian Road, Hangzhou, 310006, China.
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Chu YR, Chen Y, Lei S, Zhang YW, Yi B, Ma JM, Yan KD, Wang Y, Li BJ, Lyu MQ, Xu GZ, Zhang DL. [Epidemiological characteristics of reinfection of 2019-nCoV and influencing factors in Ningbo]. Zhonghua Liu Xing Bing Xue Za Zhi 2023; 44:1402-1407. [PMID: 37743273 DOI: 10.3760/cma.j.cn112338-20230301-00114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 09/26/2023]
Abstract
Objective: To analyze the epidemiological characteristics of reinfection of 2019-nCoV and influencing factors, and provide evidence for effective prevention and control of COVID-19 epidemic. Methods: The incidence data of COVID-19 in Ningbo from January 1, 2020 to November 30, 2022 were collected from the infectious disease surveillance system of Chinese information system for disease control and prevention. The incidence of reinfection of 2019-nCoV was investigated by using questionnaire. logistic regression analysis was used to analyze the influences of gender, age, time interval from the first infection, history of underlying disease, 2019-nCoV vaccination dose and disease severity on the reinfection. Results: A total of 897 previous 2019-nCoV infection cases were investigated, of which 115 experienced the reinfection of 2019-nCoV, the reinfection rate was 12.82%. The interval between the two infections M(Q1, Q3) was 1 052 (504, 1 056) days. Univariate analysis showed that age, 2019-nCoV vaccination dose, history of underlying disease, type of 2019-nCoV variant causing the first infection, time interval from the first infection and severity of the first infection were associated with the reinfection rate (all P<0.05). Multivariate logistic regression analysis showed that the risk for reinfection in age group 30- years was higher than that in age group ≥60 years (OR=2.10, 95%CI: 1.11-3.97). No reinfection occurred in those with time interval from the first infection of <6 months, and the risk for reinfection was higher in those with the time interval of ≥12 months than in those with the time interval of 6- months (OR=6.68, 95%CI: 3.46-12.90). The risk for reinfection was higher in the common or mild cases than in the asymptomatic cases (OR=2.64, 95%CI: 1.18-5.88; OR=2.79, 95%CI: 1.27-6.11). Conclusion: The time interval from the first infection was an important influencing factor for the reinfection of 2019-nCoV, and the probability of the reinfection within 6 months was low.
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Affiliation(s)
- Y R Chu
- Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - Y Chen
- Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - S Lei
- Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - Y W Zhang
- Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - B Yi
- Ningbo Prefectural Health Commission, Ningbo 315010, China
| | - J M Ma
- Cixi County of Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315300, China
| | - K D Yan
- Zhenhai District of Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315200, China
| | - Y Wang
- Beilun District of Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315800, China
| | - B J Li
- Haishu District of Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
| | - M Q Lyu
- Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - G Z Xu
- Medical Department of Ningbo University, Ningbo 315211, China
| | - D L Zhang
- Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
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Yang M, Xin L, Li H, Lu X, Pan X, Lei S, Li Y, Zhu L, Zhu Q, Jiang R, Jia Z, Cheng G, Zeng L, Zhang L. Risk factors for bloodstream infection in paediatric haematopoietic stem cell transplantation: a systematic review and meta-analysis. J Hosp Infect 2023; 139:11-22. [PMID: 37308062 DOI: 10.1016/j.jhin.2023.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 06/01/2023] [Accepted: 06/02/2023] [Indexed: 06/14/2023]
Abstract
BACKGROUND Haematopoietic stem cell transplantation (HSCT), a standard treatment for paediatric haematological diseases, is highly associated with bloodstream infection (BSI), which may increase mortality. AIM To explore the risk factors for BSI in paediatric HSCT recipients. METHODS Three English databases and four Chinese databases were searched from inception to March 17th, 2022. Eligible studies included randomized controlled trials, cohort studies, and case-control studies that enrolled HSCT recipients aged ≤18 years and reported BSI risk factors. Two reviewers independently screened studies, extracted data, and assessed the risk of bias. Using the Grading of Recommendations Assessment, Development, and Evaluation (GRADE), certainty of body of evidence was assessed. FINDINGS Fourteen studies involving 4602 persons were included. The incidences of BSI and associated mortality in paediatric HSCT recipients were approximately 10-50% and 5-15%, respectively. Meta-analysis of all studies revealed that previous BSI before HSCT (relative effect (RE): 2.28; 95% confidence interval (CI) 1.19-4.34, moderate certainty) and receiving an umbilical cord blood transplant (RE: 1.55; 95% CI: 1.22-1.97, moderate certainty) were probably associated with an increased risk of BSI. Meta-analysis of studies with low risk of bias reassured that previous BSI before HSCT probably increased the risk of BSI (RE: 2.28; 95% CI: 1.19-4.34, moderate certainty), and revealed that steroid use (RE: 2.72; 95% CI: 1.31-5.64, moderate certainty) was likely a risk factor whereas autologous HSCT was probably a protective factor of BSI (RE: 0.65; 95% CI: 0.45-0.94, moderate certainty). CONCLUSION These findings could inform the management of paediatric HSCT recipients, helping identify who may benefit from prophylactic antibiotics.
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Affiliation(s)
- M Yang
- Department of Pharmacy, West China Second University Hospital, Sichuan University, Chengdu 610000, China; Evidence-Based Pharmacy Centre, West China Second University Hospital, Sichuan University, Chengdu 610000, China; NMPA Key Laboratory for Technical Research on Drug Products In Vitro and In Vivo Correlation, Chengdu 610000, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children, Sichuan University, Ministry of Education, Chengdu 610000, China; West China School of Medicine, Sichuan University, Chengdu 610000, China
| | - L Xin
- Department of Clinical Pharmacy, Affiliated Hospital of Yunnan University, Kunming 650000, China
| | - H Li
- Department of Pharmacy, West China Second University Hospital, Sichuan University, Chengdu 610000, China; Evidence-Based Pharmacy Centre, West China Second University Hospital, Sichuan University, Chengdu 610000, China; NMPA Key Laboratory for Technical Research on Drug Products In Vitro and In Vivo Correlation, Chengdu 610000, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children, Sichuan University, Ministry of Education, Chengdu 610000, China
| | - X Lu
- Key Laboratory of Birth Defects and Related Diseases of Women and Children, Sichuan University, Ministry of Education, Chengdu 610000, China; Department of Paediatric Haematology and Oncology, West China Second Hospital, Sichuan University, Chengdu 610000, China
| | - X Pan
- Department of Pharmacy, West China Second University Hospital, Sichuan University, Chengdu 610000, China; Evidence-Based Pharmacy Centre, West China Second University Hospital, Sichuan University, Chengdu 610000, China; NMPA Key Laboratory for Technical Research on Drug Products In Vitro and In Vivo Correlation, Chengdu 610000, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children, Sichuan University, Ministry of Education, Chengdu 610000, China
| | - S Lei
- West China School of Pharmacy, Sichuan University, Chengdu 610000, China
| | - Y Li
- West China School of Pharmacy, Sichuan University, Chengdu 610000, China
| | - L Zhu
- West China School of Pharmacy, Sichuan University, Chengdu 610000, China
| | - Q Zhu
- West China School of Pharmacy, Sichuan University, Chengdu 610000, China
| | - R Jiang
- West China School of Pharmacy, Sichuan University, Chengdu 610000, China
| | - Z Jia
- Department of Pharmacy, West China Second University Hospital, Sichuan University, Chengdu 610000, China; Evidence-Based Pharmacy Centre, West China Second University Hospital, Sichuan University, Chengdu 610000, China; NMPA Key Laboratory for Technical Research on Drug Products In Vitro and In Vivo Correlation, Chengdu 610000, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children, Sichuan University, Ministry of Education, Chengdu 610000, China; West China School of Pharmacy, Sichuan University, Chengdu 610000, China
| | - G Cheng
- Key Laboratory of Birth Defects and Related Diseases of Women and Children, Sichuan University, Ministry of Education, Chengdu 610000, China; Department of Paediatrics, West China Second University Hospital, Sichuan University, Chengdu 610000, China; Laboratory of Molecular Translational Medicine, Centre for Translational Medicine, Sichuan University, Chengdu 610000, China
| | - L Zeng
- Department of Pharmacy, West China Second University Hospital, Sichuan University, Chengdu 610000, China; Evidence-Based Pharmacy Centre, West China Second University Hospital, Sichuan University, Chengdu 610000, China; NMPA Key Laboratory for Technical Research on Drug Products In Vitro and In Vivo Correlation, Chengdu 610000, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children, Sichuan University, Ministry of Education, Chengdu 610000, China.
| | - L Zhang
- Department of Pharmacy, West China Second University Hospital, Sichuan University, Chengdu 610000, China; Evidence-Based Pharmacy Centre, West China Second University Hospital, Sichuan University, Chengdu 610000, China; NMPA Key Laboratory for Technical Research on Drug Products In Vitro and In Vivo Correlation, Chengdu 610000, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children, Sichuan University, Ministry of Education, Chengdu 610000, China; Chinese Evidence-based Medicine Centre, West China Hospital, Sichuan University, Chengdu 610000, China.
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Yu TP, Hou J, Yang TJ, Lei S, Yang M, Su YY, Chen YC, Wu Y, Chen XQ. [Cardiac amyloidosis: pathological classification and clinical analysis of 48 cases]. Zhonghua Bing Li Xue Za Zhi 2023; 52:671-677. [PMID: 37408396 DOI: 10.3760/cma.j.cn112151-20221230-01082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 07/07/2023]
Abstract
Objective: To investigate the histological features and clinical manifestations in different types of cardiac amyloidosis to improve diagnostic accuracy. Methods: The histopathological features and clinical manifestations of 48 patients diagnosed with cardiac amyloidosis by Congo red stain and electron microscopy through endomyocardial biopsy were collected in West China Hospital of Sichuan University from January 2018 to December 2021. Immunohistochemical stains for immunoglobulin light chains (κ and λ) and transthyretin protein were carried out, and a review of literature was made. Results: The patients age ranged from 42 to 79 years (mean 56 years) and the male to female ratio was 1.1 to 1.0. The positive rate of endomyocardial biopsy was 97.9% (47/48), which was significantly higher than that of the abdominal wall fat (7/17). Congo red staining and electron microscopy were positive in 97.9% (47/48) and 93.5% (43/46), respectively. Immunohistochemical stains showed 32 cases (68.1%) were light chain type (AL-CA), including 31 cases of AL-λ type and 1 case of AL-κ type; 9 cases (19.1%) were transthyretin protein type (ATTR-CA); and 6 cases (12.8%) were not classified. There was no significant difference in the deposition pattern of amyloid between different types (P>0.05). Clinical data showed that ATTR-CA patients had less involvement of 2 or more organs and lower N-terminal pro-B-type natriuretic peptide (NT-proBNP) than the other type patients (P<0.05). The left ventricular stroke volume and right ventricular ejection fraction of ATTR-CA patients were better than the other patients (P<0.05). Follow-up data of 45 patients was obtained, and the overall mean survival time was 15.6±2.0 months. Univariate survival analysis showed that ATTR-CA patients had a better prognosis, while cardiac amyloidosis patients with higher cardiac function grade, NT-proBNP >6 000 ng/L, and troponin T >70 ng/L had a worse prognosis (P<0.05). Multivariate survival analysis showed that NT-proBNP and cardiac function grade were independent prognostic factors for cardiac amyloidosis patients. Conclusions: AL-λ is the most common type of cardiac amyloidosis in this group. Congo red staining combined with electron microscopy can significantly improve the diagnosis of cardiac amyloidosis. The clinical manifestations and prognosis of each type are different and can be classified based on immunostaining profile. However, there are still a few cases that cannot be typed; hence mass spectrometry is recommended if feasible.
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Affiliation(s)
- T P Yu
- Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - J Hou
- Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - T J Yang
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - S Lei
- Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - M Yang
- Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Y Y Su
- Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Y C Chen
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Y Wu
- Department of Hematology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - X Q Chen
- Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, China
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10
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Tang C, Zhong L, Xiong R, Xiao Y, Cheng B, Lei S. Regulable in-situ autoredox for anchoring synergistic Ni/NiO nanoparticles on reduced graphene oxide with boosted alkaline electrocatalytic oxygen evolution. J Colloid Interface Sci 2023; 648:181-192. [PMID: 37301143 DOI: 10.1016/j.jcis.2023.05.179] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 05/23/2023] [Accepted: 05/29/2023] [Indexed: 06/12/2023]
Abstract
To develop ideal alternatives to noble metal catalysts, transition metal catalysts supported on graphene have been receiving extensive attention in the field of electrochemical energy. In this work, using graphene oxide (GO) and nickel formate as precursors, Ni/NiO synergistic nanoparticles with regulable composition are anchored on reduced graphene oxide (RGO) to prepare Ni/NiO/RGO composite electrocatalysts through in-situ autoredox. Thanks to the synergistic effect of Ni3+ active sites and Ni electron donors, the as-prepared Ni/NiO/RGO catalysts exhibit efficient electrocatalytic oxygen evolution performance in 1.0 M KOH electrolyte. The optimal sample has an overpotential of only 275 mV at a current density of 10 mA cm-2 and a small Tafel slope of 90 mV dec-1, which are very comparable to those of commercial RuO2 catalyst. Additionally, the catalytic capacity and structure remain stable after 2000 cyclic voltammetry cycles. For the electrolytic cell assembled with the best-performing sample as anode and commercial Pt/C as cathode, the current density can reach 10 mA cm-2 at a low potential of 1.57 V and remains stable after 30 h of continuous work. It would be expected that the as-developed Ni/NiO/RGO catalyst with high activity should have broad application prospects.
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Affiliation(s)
- Changcun Tang
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Longsheng Zhong
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Renzhi Xiong
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Yanhe Xiao
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Baochang Cheng
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Shuijin Lei
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China.
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11
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Yang H, Wang H, Li C, He X, Lei S, Li W, Meng P, Wang J, Liu J, Wang Y. [ Zuogui Jiangtang Jieyu Decoction promotes neural stem cell self-renewal and activates Shh signaling in the hippocampal dentate gyrus of diabetic rats with depression]. Nan Fang Yi Ke Da Xue Xue Bao 2023; 43:694-701. [PMID: 37313809 DOI: 10.12122/j.issn.1673-4254.2023.05.03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
OBJECTIVE To investigate the effect of Zuogui Jiangtang Jieyu Decoction (ZJJ) on Shh signaling and self-renewal of neural stem cells in the hippocampal dentate gyrus of diabetic rats with depression. METHODS Diabetic rat models with depression were randomly divided into model group, positive drug (metformin + fluoxetine) group, and low-, medium-, and high-dose ZJJ groups (n=16), with normal SD rats as the control group. The positive drugs and ZJJ were administered by gavage, and the rats in the control and model groups were given distilled water. After the treatment, blood glucose level was detected using test strips, and behavioral changes of the rats were assessed by forced swimming test and water maze test. ELISA was used to examine the serum level of leptin; The expressions of nestin and Brdu proteins in the dentate gyrus of the rats were detected using immunofluorescence assay, and the expressions of self-renewal marker proteins and Shh signaling proteins were detected using Western blotting. RESULTS The diabetic rats with depression showed significantly increased levels of blood glucose and leptin (P < 0.01) and prolonged immobility time in forced swimming test (P < 0.01) and increased stage climbing time with reduced stage seeking time and stage crossings in water maze test (P < 0.01). The expressions of nestin and Brdu in the dentate gyrus, the expressions of cyclin D1, SOX2, Shh, Ptch1, Smo in the hippocampus and the nuclear expression of Gli-1 were decreased (P < 0.01) while hippocampal Gli-3 expression was increased significantly (P < 0.01) in the rat models. Treatment of rat models with high-dose ZJJ significantly reduced the blood glucose (P < 0.01) and leptin level (P < 0.05) and improved their performance in behavioral tests (P < 0.01). The treatment also obviously increased the expressions of nestin, Brdu, cyclin D1, SOX2, Shh, Ptch1, and Smo and the nuclear expression of Gli-1 in the dentate gyrus (P < 0.01) and reduced hippocampal expression of Gli-3 (P < 0.05) in the rat models. CONCLUSION ZJJ can significantly improve the self-renewal ability of neural stem cells and activate Shh signaling in dentate gyrus of diabetic rats with depression.
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Affiliation(s)
- H Yang
- Centre for Medical Innovations, First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha 410007, China
- Centre for Medical Innovations, Science and Technology Innovation Center, Changsha, 410208, China
| | - H Wang
- Centre for Medical Innovations, First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha 410007, China
| | - C Li
- Emergency Department, 921th Hospital of Joint Logistics Support Force of the Chinese People's Liberation Army, Changsha 410153, China
| | - X He
- Hunan Provincial Drug Evaluation and Adverse Reaction Monitoring Center, Changsha 410013, China
| | - S Lei
- Centre for Medical Innovations, First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha 410007, China
| | - W Li
- Centre for Medical Innovations, First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha 410007, China
| | - P Meng
- Centre for Medical Innovations, Science and Technology Innovation Center, Changsha, 410208, China
| | - J Wang
- Centre for Medical Innovations, First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha 410007, China
| | - J Liu
- Centre for Medical Innovations, First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha 410007, China
| | - Y Wang
- Centre for Medical Innovations, Science and Technology Innovation Center, Changsha, 410208, China
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12
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Pangkanon W, Siu M, Salasnek R, Lei S, Wannaphut C, Puchongmart C, Thimphitthaya C, Wattanachayakul P, Lalitnithi P, Lopimpisuth C, Naunsilp P, Chaisrimaneepan N, Tantisattamo E. WCN23-1106 POLYOMAVIRUS TYPE BK-ASSOCIATED NEPHROPATHY IN A NON-KIDNEY TRANSPLANT RECIPIENT. Kidney Int Rep 2023. [DOI: 10.1016/j.ekir.2023.02.927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2023] Open
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13
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Xiong R, Zhou X, Chen K, Xiao Y, Cheng B, Lei S. Oxygen-Defect-Mediated ZnCr 2O 4/ZnIn 2S 4 Z-Scheme Heterojunction as Photocatalyst for Hydrogen Production and Wastewater Remediation. Inorg Chem 2023; 62:3646-3659. [PMID: 36765458 DOI: 10.1021/acs.inorgchem.2c04500] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
Photocatalysis has long been considered a promising technology in green energy and environmental remediation. Since the poor performance of single components greatly limits the practical applications, the construction of heterostructures has become one of the most important technical means to improve the photocatalytic activity. In this work, based on the synthesis of oxygen-vacancy-rich ZnCr2O4 nanocrystals, ZnCr2O4/ZnIn2S4 composites are prepared via a low-temperature in situ growth, and the oxygen-vacancy-induced Z-scheme heterojunction is successfully constructed. The unique core-shell structure offers a tight interfacial contact, increases the specific surface area, and promotes the rapid charge transfer. Meanwhile, the oxygen-vacancy defect level not only enables wide-bandgap ZnCr2O4 to be excited by visible light enhancing the light absorption, but also provides necessary conditions for the construction of Z-scheme heterojunctions promoting charge separation and migration and allowing more reactive charges. The reaction rates of visible-light-driven photocatalytic hydrogen production (3.421 mmol g-1 h-1), hexavalent chromium reduction (0.124 min-1), and methyl orange degradation (0.067 min-1) of the composite reach 3.6, 6.5, and 8.4 times those of pure ZnIn2S4, and 15.8, 41.3, and 67.0 times those of pure ZnCr2O4, respectively. This work presents a novel option for constructing high-performance photocatalysts.
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Affiliation(s)
- Renzhi Xiong
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, P. R. China
| | - Xiaoheng Zhou
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, P. R. China.,Institute for Advanced Study, Nanchang University, Nanchang, Jiangxi 330031, P. R. China
| | - Keqin Chen
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, P. R. China.,School of Arts and Sciences, New York University Shanghai, Shanghai 200126, P. R. China
| | - Yanhe Xiao
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, P. R. China
| | - Baochang Cheng
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, P. R. China
| | - Shuijin Lei
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, P. R. China
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14
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Li K, Tang C, Xiong R, Xiao Y, Cheng B, Lei S. Vacancy-Mediated Z-Scheme Heterostructure in SnO 2-Decorated Spinel In 3-xS 4 with Boosted Photocatalytic Activity. Inorg Chem 2023; 62:543-556. [PMID: 36534974 DOI: 10.1021/acs.inorgchem.2c03776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The widespread application of dyes and heavy metals causes increasing environmental pollution. One effective way to mitigate environmental pollution is to use semiconductor photocatalysts for redox purification of pollutants. Heterostructured photocatalysts can reduce the electron-hole recombination rate and improve light utilization. In this work, a novel SnO2/In3-xS4 composite with oxygen vacancy defect-mediated Z-scheme heterostructure is constructed for the first time by a one-pot method, in which SnO2 ultrasmall nanocrystals are decorated on nanopetals of flower-like In3-xS4. Material analyses show that the as-built three-dimensional hierarchical architecture is able to essentially increase the specific surface area and thus the active sites of the products. More importantly, the formation of Z-scheme heterojunction between the oxygen vacancy-induced SnO2 defect level and the In3-xS4 band structure not only promotes the separation of photogenerated charges but also makes them more reactive. Through the optimization of the composition ratio between the two phases, the visible-light-driven photocatalytic reaction rates of rhodamine B degradation and Cr(VI) reduction for the developed SnO2/In3-xS4 composite photocatalyst are 12.8 and 6.3 times of bare In3-xS4 and 32.0 and 76.0 times of bare SnO2, respectively. This work should provide a promising implication for designing new high-performance composite photocatalysts.
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Affiliation(s)
- Kunjiao Li
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Changcun Tang
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Renzhi Xiong
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Yanhe Xiao
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Baochang Cheng
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Shuijin Lei
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
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15
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Lin Y, Li J, Xie W, Ouyang Z, Zhao J, Xiao Y, Lei S, Cheng B. FeCoNi Ternary Nano-Alloys Embedded in a Nitrogen-Doped Porous Carbon Matrix with Enhanced Electrocatalysis for Stable Lithium-Sulfur Batteries. ACS Appl Mater Interfaces 2022; 14:51001-51009. [PMID: 36318543 DOI: 10.1021/acsami.2c15918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The application of composite materials that combine the advantages of carbonaceous material and metal alloy proves to be a valid method for improving the performance of lithium-sulfur batteries (LSBs). Herein iron-cobalt-nickel (FeCoNi) ternary alloy nanoparticles (FNC) that spread on nitrogen-doped carbon (NC) are obtained by a strategy of low-temperature sol-gel followed by annealing at 800 °C under an argon/hydrogen atmosphere. Benefiting from the synergistic effect of different components of FNC and the conductive network provided by the NC, not only can the "shuttle effect" of lithium polysulfides (LiPS) be suppressed, but also the conversion of LiPS, the diffusion of Li+, and the deposition of Li2S can be accelerated. Taking advantage of those merits, the batteries assembled with an FNC@NC-modified polypropylene (PP) separator (FNC@NC//PP) can deliver a high reversible specific capacity of 1325 mAh g-1 at 0.2 C and maintain 950 mAh g-1 after 200 cycles, and they can also achieve a low capacity fading rate of 0.06% per cycle over 500 cycles at 1 C. More impressively, even under harsh test conditions (the ratio of electrolyte to sulfur (E/S) = 6 μL mg-1 and sulfur loading = 4.7 mg cm-2 and E/S = 10 μL mg-1 and sulfur loading = 5.9 mg cm-2), the area capacity of batteries is still much higher than 4 mAh cm-2.
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Affiliation(s)
- Yang Lin
- Nanoscale Science and Technology Laboratory, Institute for Advanced Study, Nanchang University, Jiangxi 330031, P. R. China
| | - Jianchao Li
- School of Physics and Materials, Nanchang University, Jiangxi 330031, P. R. China
| | - Wenju Xie
- Nanoscale Science and Technology Laboratory, Institute for Advanced Study, Nanchang University, Jiangxi 330031, P. R. China
- College of Ecology and Resources Engineering, Fujian Provincial Key Laboratory of Eco-Industrial Green Technology, Wuyi University, Fujian 354300, P. R. China
| | - Zhiyong Ouyang
- Nanoscale Science and Technology Laboratory, Institute for Advanced Study, Nanchang University, Jiangxi 330031, P. R. China
| | - Jie Zhao
- School of Physics and Materials, Nanchang University, Jiangxi 330031, P. R. China
| | - Yanhe Xiao
- School of Physics and Materials, Nanchang University, Jiangxi 330031, P. R. China
| | - Shuijin Lei
- School of Physics and Materials, Nanchang University, Jiangxi 330031, P. R. China
| | - Baochang Cheng
- Nanoscale Science and Technology Laboratory, Institute for Advanced Study, Nanchang University, Jiangxi 330031, P. R. China
- School of Physics and Materials, Nanchang University, Jiangxi 330031, P. R. China
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16
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Conroy D, Sholklapper T, Lawlor M, Cantalino J, Zwart A, Ayoob M, Danner M, Yung T, Collins B, Lei S, Rashid A, Kumar D, Suy S, Aghdam N, Collins S. Correlation between Obesity and Treatment Failure Following Stereotactic Body Radiation Therapy (SBRT) for Clinically Localized Prostate Cancer. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.1159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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17
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Repka M, Sholklapper T, Zwart A, Danner M, Ayoob M, Yung T, Lei S, Collins B, Kumar D, Suy S, Hankins R, Kishan A, Collins S. Prognostic Utility of Biopsy-Based PTEN and ERG Status on Biochemical Progression and Overall Survival after SBRT for Localized Prostate Cancer. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.2130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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18
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Zhang DL, Chen Y, Yi B, Wang AH, Ma X, Chu YR, Lei S, Zhang YW, Li MY, Xu GZ. [Epidemiological characteristics of a local cluster epidemic caused by 2019-nCoV Delta variant in Ningbo, 2021]. Zhonghua Liu Xing Bing Xue Za Zhi 2022; 43:1376-1380. [PMID: 36117342 DOI: 10.3760/cma.j.cn112338-20220214-00119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To understand the epidemiological characteristics of a local clustered epidemic caused by 2019-nCoV Delta variant in Ningbo and provide reference for the improvement of COVID-19 epidemic prevention and control. Methods: Case finding was conducted based on case definitions, and field epidemiological investigation of COVID-19 cases was carried out. In which Nasal and oropharyngeal swabs of the cases were collected for pathogen testing, and the results were analyzed with descriptive epidemiological methods. Results: A total of 74 COVID-19 cases were reported in this epidemic, and the cases were mainly mild ones, accounting for 87.84% (65/74), and there were no severe or critical cases. The epidemic curve showed a human-to-human transmission mode, indicating that a transmission for at least six generations had occurred. The age of the COVID-19 patients ranged from 2 years to 80 years, and 27.03% (20/74) of the cases were older than 60 years. The cases were mainly workers (55.41%, 41/74) and housework/the unemployed (27.03%, 20/74). The COVID-19 epidemic was limited, and no further spread to other areas occurred. The transmission chain among the cases was clear, and the gene sequencing results confirmed that the current epidemic was caused by 2019-nCoV Delta variant, which was highly homologous to the strains from other province. Conclusion: The local COVID-19 epidemic in Ningbo was caused by imported cases of COVID-19 from other province, and local community spread occurred through daily contacts between cases and contacts.
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Affiliation(s)
- D L Zhang
- Department of Communicable Disease Control and Prevention, Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - Y Chen
- Department of Communicable Disease Control and Prevention, Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - B Yi
- Department of Communicable Disease Control and Prevention, Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - A H Wang
- Department of Communicable Disease Control and Prevention, Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - X Ma
- Department of Communicable Disease Control and Prevention, Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - Y R Chu
- Department of Communicable Disease Control and Prevention, Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - S Lei
- Department of Communicable Disease Control and Prevention, Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - Y W Zhang
- Department of Communicable Disease Control and Prevention, Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - M Y Li
- Department of Communicable Disease Control and Prevention, Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - G Z Xu
- Department of Communicable Disease Control and Prevention, Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
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Gou R, Ouyang Z, Xu C, He S, Cheng S, Shi C, Zhao J, Xiao Y, Lei S, Cheng B. Actual origin and precise control of asymmetrical hysteresis in an individual CH 3NH 3PbI 3 micro/nanowire for optical memory and logic operation. Nanoscale Horiz 2022; 7:1095-1108. [PMID: 35913084 DOI: 10.1039/d2nh00209d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Although CH3NH3PbI3 can present an excellent photoresponse to visible light, its application in solar cells and photodetectors is seriously hindered due to hysteresis behaviour. Moreover, for its origin, there exist different opinions. Herein, we demonstrate a route to realize precise control for the electrical transport of a single CH3NH3PbI3 micro/nanowire by constructing a two-terminal device with asymmetric Ag and C electrodes, and its hysteresis can be clearly identified as a synergistic effect of the redox reaction at the interface of the Ag electrode and the injection and ejection of holes in the interfacial traps of the C electrode rather than its bulk effect. The device can show superior bias amplitude and illumination intensity dependence of hysteresis loops with typical bipolar resistive switching features. Thus, an excellent multilevel nonvolatile optical memory can be effectively realized by the modulation of the illumination and bias, and moreover a logic OR gate operation can be successfully implemented with voltage and illumination as input signals as well. This work clearly reveals and provides a new insight of hysteresis origin that can be attributed to a synergistic effect of two asymmetrical electrode interfaces, and therefore precisely controlling its electrical transport to realize an outstanding application potential in multifunctional devices integrated with optical nonvolatile memory and logic OR gate operation.
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Affiliation(s)
- Runna Gou
- School of Physics and Materials, Nanchang University, Jiangxi, 330031, P. R. China.
| | - Zhiyong Ouyang
- Nanoscale Science and Technology Laboratory, Institute for Advanced Study, Nanchang University, Jiangxi, 330031, P. R. China
| | - Changsen Xu
- Nanoscale Science and Technology Laboratory, Institute for Advanced Study, Nanchang University, Jiangxi, 330031, P. R. China
| | - Song He
- School of Physics and Materials, Nanchang University, Jiangxi, 330031, P. R. China.
| | - Shouduan Cheng
- School of Physics and Materials, Nanchang University, Jiangxi, 330031, P. R. China.
| | - Cencen Shi
- Nanoscale Science and Technology Laboratory, Institute for Advanced Study, Nanchang University, Jiangxi, 330031, P. R. China
| | - Jie Zhao
- School of Physics and Materials, Nanchang University, Jiangxi, 330031, P. R. China.
| | - Yanhe Xiao
- School of Physics and Materials, Nanchang University, Jiangxi, 330031, P. R. China.
| | - Shuijin Lei
- School of Physics and Materials, Nanchang University, Jiangxi, 330031, P. R. China.
| | - Baochang Cheng
- School of Physics and Materials, Nanchang University, Jiangxi, 330031, P. R. China.
- Nanoscale Science and Technology Laboratory, Institute for Advanced Study, Nanchang University, Jiangxi, 330031, P. R. China
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20
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Yi B, Chu YR, Chen Y, Zhang DL, Zhang YW, Lei S, Hong L, Li QF, Gu XM, Lao XY, Wang HB, Lin JF, Xu G. [Analysis on infection risk in secondary close contacts of COVID-19 patients]. Zhonghua Liu Xing Bing Xue Za Zhi 2022; 43:1237-1240. [PMID: 35981985 DOI: 10.3760/cma.j.cn112338-20220314-00186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To study the infection rate of secondary close contacts of COVID-19 patients, and assess the infection risk in the contacts. Methods: COVID-19 patients' close contacts (with a clear exposure time to index case) with negative nucleic acid test results and secondary close contacts were surveyed in continuous isolation and medical observation in this prospective study. The dynamic nucleic acid test results of the close contacts and secondary contacts of COVID-19 patients were collected to assess their risk of infection. Results: A total of 4 533 close contacts were surveyed, in whom 14 were confirmed as COVID-19 patients with overall secondary attack rate of 0.31%, and 4 201 secondary contacts were tracked, in whom no subsequent infections occurred. Conclusion: Close contacts of COVID-19 patients entered in centralized isolation for medical observation with negative nucleic acid tese results,the secondary close contacts of COVID-19 patients have no risk of infection.
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Affiliation(s)
- B Yi
- Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - Y R Chu
- Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - Y Chen
- Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - D L Zhang
- Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - Y W Zhang
- Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - S Lei
- Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - L Hong
- Zhenhai District Center for Disease Control and Prevention, Ningbo 315200, China
| | - Q F Li
- Beilun District Center for Disease Control and Prevention, Ningbo 315800, China
| | - X M Gu
- Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - X Y Lao
- Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - H B Wang
- Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
| | - J F Lin
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - Guozhang Xu
- Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China
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Xiong R, Tang C, Liu S, Xiao Y, Cheng B, Lei S. Unique multi-hierarchical Z-scheme heterojunction of branching SnIn4S8 nanosheets on ZnIn2S4 nanopetals for boosted photocatalytic performance. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121267] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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22
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Bian Q, Liao H, Tang C, Li K, Wan J, Xiao Y, Cheng B, Lei S. Sulfur-source-dependent phase-selective preparation of Cu 3NiInSnS 6 nanocrystals and their optical and magnetic properties. Dalton Trans 2022; 51:11416-11426. [PMID: 35822345 DOI: 10.1039/d2dt01643e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Multifunctional multinary metal chalcogenides have long been a research hotspot in the field of materials chemistry due to their rich composition, flexible structure, excellent properties and wide range of applications. However, the exploration of complex quinary chalcogenides is still challenging. In this work, for the first time, we have developed the controlled synthesis of quinary Cu3NiInSnS6 nanocrystals, realizing the selective preparation of hexagonal wurtzite and cubic zinc blende metastable phases by simply tuning the sulfur source. The phase structure analysis reveals that both metastable phases possess a disordered structure with a random distribution of metal atoms in the unit cells. The fabricated wurtzite and zinc blende-structure Cu3NiInSnS6 nanocrystals have a direct band gap of 1.82 and 1.94 eV, respectively, and both exhibit superparamagnetic behavior at low temperatures. This work is of great significance for the development of novel multifunctional materials based on metastable multinary metal chalcogenide phases.
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Affiliation(s)
- Qinghuan Bian
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, P. R. China.
| | - Huanxi Liao
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, P. R. China.
| | - Changcun Tang
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, P. R. China.
| | - Kunjiao Li
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, P. R. China.
| | - Jiabao Wan
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, P. R. China.
| | - Yanhe Xiao
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, P. R. China.
| | - Baochang Cheng
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, P. R. China.
| | - Shuijin Lei
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, P. R. China.
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Chen Y, Yan KD, Zhang DL, Yi B, Wang AH, Lei S, Hong H, Chu YR, Xu GZ. [Transmission chains of local epidemic of COVID-19 caused by 2019-nCoV Delta variant in Zhenhai district, Ningbo]. Zhonghua Liu Xing Bing Xue Za Zhi 2022; 43:1044-1048. [PMID: 35856197 DOI: 10.3760/cma.j.cn112338-20220214-00116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To investigate the local epidemic of COVID-19 caused by 2019-nCoV Delta variant in Zhenhai district of Ningbo, identify the transmission chain and provide reference for the prevention and control of COVID-19 epidemic. Methods: The incidence data of COVID-19 in Zhenhai from 6 to 18 December, 2021 were collected in field investigation. Field epidemiological investigation was conducted to understand the epidemiological characteristics of COVID-19 cases and analyze the transmission chains. Results: The first case might be infected with 2019-nCoV through direct or indirect exposure when passing through a medium-risk area, then a family cluster was caused, and the epidemic spread through close contacts of family members with others such as work, daily life, and moxibustion. The epidemic lasted for 14 days, and 74 confirmed COVID-19 cases were reported. The median incubation period was 4.0(3.0,5.8)d. All the cases were in a chain of transmission for more than 6 generations, and the intergenerational interval was 3.5(2.0,5.3)d. The gene sequencing result indicated that the pathogen was Delta AY.4 variant of 2019-nCoV. Both the epidemiological investigation and the gene sequencing results supported that the local COVID-19 epidemic in Zhenhai was associated with the COVID-19 epidemic in Shanghai. Conclusions: The transmission chain of this epidemic was clear. Delta AY.4 variant has obvious characteristic to cause case clusters in families, places with poor ventilation, and residential communities. It is suggested to strengthen the health management in key areas and key populations, and increase the frequency of nucleic acid testing.
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Affiliation(s)
- Y Chen
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
| | - K D Yan
- Zhenhai District of Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315200, China
| | - D L Zhang
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
| | - B Yi
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
| | - A H Wang
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
| | - S Lei
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
| | - H Hong
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
| | - Y R Chu
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
| | - G Z Xu
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
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Chu YR, Zhang YW, Lei S, Chen Y, Zhang DL, Gu XM, Lao XY, Wang HB, Shen XD, Hu QX, Yi B, Chen EF, Xu G. [Analysis on infectivity of COVID-19 patients before and after last negative nucleic acid test]. Zhonghua Liu Xing Bing Xue Za Zhi 2022; 43:841-845. [PMID: 35725339 DOI: 10.3760/cma.j.cn112338-20220301-00164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To investigate the infection rate in close contacts of COVID-19 patients before and after the last negative nucleic acid test, evaluate the effect of dynamic nucleic acid test in determining the infectivity of COVID-19 patients. Methods: Dynamic nucleic acid test results of COVID-19 cases were collected in a retrospective cohort study. COVID-19 cases with negative nucleic acid test results before their first positive nucleic acid tests were selected as study subjects. Close contacts of the index cases and the secondary close contacts were kept isolation for medical observation to assess their risk of infection. Results: This study included 89 confirmed cases from two local COVID-19 epidemics in Ningbo. A total of 5 609 close contacts were surveyed, the overall infection rate was 0.20%. No close contacts of the COVID-19 cases before the last negative nucleic acid test were infected, and the infection rate in the close contacts of the COVID-19 cases after the last negative nucleic acid test was 1.33%, all of these close contacts lived together with the index cases. No secondary close contacts were infected. Conclusion: COVID-19 patient becomes infectious after the last nucleic acid is negative, and has no infectivity before the last nucleic acid negative.
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Affiliation(s)
- Y R Chu
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
| | - Y W Zhang
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
| | - S Lei
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
| | - Y Chen
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
| | - D L Zhang
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
| | - X M Gu
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
| | - X Y Lao
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
| | - H B Wang
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
| | - X D Shen
- Zhenhai District of Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315200, China
| | - Q X Hu
- Beilun District Center for Disease Control and Prevention, Ningbo 315800, China
| | - B Yi
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
| | - E F Chen
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - Guozhang Xu
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
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Zhao L, Lei S, Tang C, Tu Q, Rao L, Liao H, Zeng W, Xiao Y, Cheng B. Self-supported electrode based on two-dimensional NiPS3 for supercapacitor application. J Colloid Interface Sci 2022; 616:401-412. [DOI: 10.1016/j.jcis.2022.02.089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 02/11/2022] [Accepted: 02/19/2022] [Indexed: 12/22/2022]
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Luo Y, Ouyang Z, Lin Y, Song X, He S, Zhao J, Xiao Y, Lei S, Yuan C, Cheng B. Revealing the synergistic mechanism of multiply nanostructured V 2O 3 hollow nanospheres integrated with doped N, Ni heteroatoms, in-situ grown carbon nanotubes and coated carbon nanolayers for the enhancement of lithium-sulfur batteries. J Colloid Interface Sci 2022; 612:760-771. [PMID: 35030347 DOI: 10.1016/j.jcis.2021.12.193] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Revised: 12/31/2021] [Accepted: 12/31/2021] [Indexed: 11/16/2022]
Abstract
Lithium sulfur (Li-S) batteries are regarded as one of the most promising future energy storage candidates on account of high theoretical specific capacity of 1675 mAh g-1 and energy density of 2600 Wh kg-1. However, their practical application is seriously hindered due to the poor conductivity and volume expansion of sulfur, the weak redox kinetics of lithium polysulfide (LPS), and the severe shuttle effect of LPS. Herein, V2O3@N,Ni-C nanostructures, multiply integrated with zero-dimensional (0D) V2O3 nanoparticles, 1D carbon nanotubes, 2D carbon coating layers and graphene, 3D hollow spheres, and doped N and Ni heteroatoms, were synthesized via a solvothermal method followed by chemical vapor deposition. After being used as a modifier for traditional commercial separator of Li-S batteries, the shuttle effect of LPS can be effectively suppressed owing to the abundant active physical and chemical adsorption sites derived from large specific surface area, rich porosity, and tremendous polarity of the V2O3 nanoparticles with multiple secondary nanostructure integration. Meanwhile, the transfer of Li+ ions and electrons can be effectively enhanced by the highly conductive 2D carbon network, and the kinetics of redox reaction (Li2Sn ↔ Li2S) can be accelerated by the doped N and Ni heteroatoms, leading to a synergistic promotion on the reutilization of the adsorbed LPS. Additionally, the unique 3D hollow structure can not only enhance the penetration of electrolyte, but also buffer the volume expansion of sulfur to some extent. Therefore, the rate capacity and cycling performance can be significantly enhanced by the multifunction synergism of adsorption, conductivity, catalysis, and volume buffering. An initial discharge capacity of 1590.4 mAh g-1can be achieved at 0.1C, and the discharge capacity of 803.5 mAh g-1can be still exhibited when increasing to 2C. After a long period of 500 cycles, additionally, the discharge specific capacity of 1142.2 mAh g-1 and capacity attenuation of 0.0617% per cycle can be obtained at 1C.
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Affiliation(s)
- Yahui Luo
- School of Materials Science and Engineering, Nanchang University, Jiangxi 330031, PR China
| | - Zhiyong Ouyang
- Nanoscale Science and Technology Laboratory, Institute for Advanced Study, Nanchang University, Jiangxi 330031, PR China
| | - Yang Lin
- Nanoscale Science and Technology Laboratory, Institute for Advanced Study, Nanchang University, Jiangxi 330031, PR China
| | - Xueyou Song
- School of Materials Science and Engineering, Nanchang University, Jiangxi 330031, PR China
| | - Song He
- School of Materials Science and Engineering, Nanchang University, Jiangxi 330031, PR China
| | - Jie Zhao
- School of Materials Science and Engineering, Nanchang University, Jiangxi 330031, PR China
| | - Yanhe Xiao
- School of Materials Science and Engineering, Nanchang University, Jiangxi 330031, PR China
| | - Shuijin Lei
- School of Materials Science and Engineering, Nanchang University, Jiangxi 330031, PR China
| | - Cailei Yuan
- Jiangxi Key Laboratory of Nanomaterials and Sensors, School of Physics, Communication and Electronics, Jiangxi Normal University, Jiangxi 330022, China
| | - Baochang Cheng
- School of Materials Science and Engineering, Nanchang University, Jiangxi 330031, PR China; Nanoscale Science and Technology Laboratory, Institute for Advanced Study, Nanchang University, Jiangxi 330031, PR China.
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Yu JJ, Lei S, Li FL, Chen SS, Tang XL. [Effects of Porphyromonas gingivalis injected through tail vein on the expressions of biomarkers in neural stem cells and neurons of wild-type rats hippocampus]. Zhonghua Kou Qiang Yi Xue Za Zhi 2022; 57:375-383. [PMID: 35359079 DOI: 10.3760/cma.j.cn112144-20220214-00059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Objectives: To study the effects of Porphyromonas gingivalis (Pg) injected through tail vein on the molecular expression levels of biomarkers of neural stem cells (NSC) and neurons in the hippocampus of wild-type adult rats, and the effects on hippocampal neurogenesis. Methods: Eighteen male Sprague-Dawley (SD) rats were randomly divided into 3 groups based on the table of random numbers (n=6 in each group). In low-intensity group and high-intensity group, rats were injected intravenously through tail vein with 200 μl Pg ATCC33277 [1.0×103 and 1.0×108 colony forming unit (CFU), respectively] 3 times per week for 8 weeks. In the sham group, 200 μl of phosphate buffer saline (PBS) was given instead. Behavioral tests: the navigation and the exploration tests using Morris water maze (MWM) were applied to evaluate learning and memory ability of rats. Immunohistochemistry was performed to detect cells positively expressing nestin, doublecortin (DCX) and neuronal nuclei (NeuN) in the subgranular zone (SGZ) of rats in each group. Western blotting was used to evaluate the expression levels of nestin, DCX and NeuN in rat hippocampus. Results: Learning and memory abilities: on day 5 of navigation test, the lagency time was 22.83 (16.00, 38.34) s in the high-intensity group, significantly longer than the sham group [5.59 (5.41, 6.17) s] (t=-11.17, P<0.001). There were no significant differences between the low-intensity group [9.85 (8.75, 21.01) s] and the sham group (t=-6.83, P=0.080). Results in the exploration test showed that, in the high-intensity group, the number of fime crossing over the previous platform area within 60 s was 1.50 (1.00, 2.00), significantly less than the sham group [4.00 (2.75, 4.00)] (t=9.75, P=0.003); no significant differences between the low-intensity group [2.50 (2.00, 3.00)] and the sham one (t=4.50, P=0.382). Immunohistochemistry showed that the nestin+ cell density in the low-intensity group [(35.36±4.32) cell/mm2] and high-intensity group [(26.51±5.89) cell/mm2] were significantly lower than the sham group [(59.58±14.15) cell/mm2] (t=24.21, P=0.018; t=33.07, P=0.005); as for the mean absorbance of DCX+ cells, the low-intensity group (0.007±0.002) and the high-intensity group (0.006±0.002) were significantly lower than the sham group (0.011±0.001) (t=0.004, P=0.018; t=0.006, P=0.005); compared with the sham group [(1.13±0.14)×103 cell/mm2], the density of NeuN+ neurons in the high-intensity group [(0.75±0.08)×103 cell/mm2] was significantly reduced (t=0.38, P=0.017), and was not significantly changed in the low-intensity group [(0.88±0.19)×103 cell/mm2] (t=0.25, P=0.075). Western blotting results showed that, compared with the sham group, the expression levels of nestin, DCX, and NeuN were significantly reduced in the high-intensity group (t=0.74, P<0.001; t=0.18, P=0.014; t=0.35, P=0.008), but were not statistically changed in the low-intensity group (t=0.18, P=0.108; t=0.08, P=0.172; t=0.19, P=0.077). Conclusions: Pg injected through tail vein may reduce learning and memory abilities of wild-type rats, and may reduce the number of nestin, DCX, and NeuN-positive cells, and the protein expression levels of the above molecules in the hippocampus.
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Affiliation(s)
- J J Yu
- Department of Periodontics, School and Hospital of Stomatology, China Medical University, Liaoning Provincial Key Laboratory of Oral Diseases, Shenyang 110002, China
| | - S Lei
- Department of Periodontics, School and Hospital of Stomatology, China Medical University, Liaoning Provincial Key Laboratory of Oral Diseases, Shenyang 110002, China
| | - F L Li
- Department of Periodontics, School and Hospital of Stomatology, China Medical University, Liaoning Provincial Key Laboratory of Oral Diseases, Shenyang 110002, China
| | - S S Chen
- Department of Periodontics, School and Hospital of Stomatology, China Medical University, Liaoning Provincial Key Laboratory of Oral Diseases, Shenyang 110002, China
| | - X L Tang
- Department of Periodontics, School and Hospital of Stomatology, China Medical University, Liaoning Provincial Key Laboratory of Oral Diseases, Shenyang 110002, China
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Wang Y, Yang G, Xu H, Zhang S, Yang Y, Xu F, Lei S, Ai X, Li H, Hao X, Li J. 15P Preliminary results of histone deacetylase inhibitor tucidinostat combined with PD-1 inhibitor sintilimab in non-small cell lung cancer failed to standard therapies. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.02.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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29
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Zheng X, Ji Q, Sun Y, Ge M, Zhang B, Cheng Y, Lei S, Shi F, Zhang W, Gao M. 29P LIBRETTO-321, a phase II study of the efficacy and safety of selpercatinib in Chinese patients with advanced RET-altered thyroid cancer (TC). Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.01.038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Lin Y, Ouyang Z, He S, Song X, Luo Y, Zhao J, Xiao Y, Lei S, Yuan C, Cheng B. An individual sandwich hybrid nanostructure of cobalt disulfide in-situ grown on N doped carbon layer wrapped on multi-walled carbon nanotubes for high-efficiency lithium sulfur batteries. J Colloid Interface Sci 2021; 610:560-572. [PMID: 34838317 DOI: 10.1016/j.jcis.2021.11.102] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 11/17/2021] [Accepted: 11/18/2021] [Indexed: 02/03/2023]
Abstract
Binding and trapping of lithium polysulfide (LPS) are being conceived as the most effective strategies to improve lithium-sulfur (Li-S) battery performance. Therefore, exploiting a simple but cost-effective approach for the absorption and conversion of LPS and the transfer of electrons and Li+ ions is of paramount importance. Herein, sandwich structure MWCNTs@N-doped-C@CoS2 integrated with multiple nanostructures of zero-dimensional (0D) CoS2 nanoparticles, 1D carbon nanotubes (CNTs), and 2D N-doped amorphous carbon layer was obtained, where MWCNTs was firstly uniformly attached with a polydopamine (PDA) of excellent adhesion, followed by hydrothermal method, the Co2+ nanoparticles were in-situ grown on the PDA by the formation of complex compound of Co2+ and N atoms in PDA, and then the CoS2 nanoparticles were in-situ grown on CNTs in a point-surface contact way by a bridging of N-doped amorphous carbon layer derived from the carbonization of attached PDA after the vulcanization at 500 °C under Ar atmosphere. The multifunction synergism of absorption, conductivity, and the kinetics of LPS redox is significantly improved, consequently effectively suppressing the shuttle effect and tremendously increasing the utilization rate of active substance. For the Li-S battery assembled with MWCNTs@N-doped-C@CoS2-modified separator, its rate capacity and cycling performance can be greatly enhanced. It can exhibit a high initial discharge capacity of 1590 mAh g-1 at 0.1 C, a stable long-term cycling performance with a relatively low capacity decay of 0.07% per cycle during 500 cycles at 1 C, and a reversible capacity of 772 mAh g-1 and a capacity decay of 0.04% per cycle during 250 cycles at 2 C. Even at a large current density of 4 C, an initial specific discharge capacity of 634 mAh g-1 can still be delivered. With a high sulfur loading of 5.0 mg cm-2, additionally, an outstanding cycling stability can also be well maintained at 685 mAh g-1 at 0.1 C after 50 cycles. This work provides a novel and simple but effective strategy to develop such sandwich hybrid materials comprised of polar metal sulfides and conductive networks via an effective bridging to help realize durable and stable Li-S battery.
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Affiliation(s)
- Yang Lin
- School of Materials Science and Engineering, Nanchang University, Jiangxi 330031, PR China; Nanoscale Science and Technology Laboratory, Institute for Advanced Study, Nanchang University, Jiangxi 330031, PR China
| | - Zhiyong Ouyang
- Nanoscale Science and Technology Laboratory, Institute for Advanced Study, Nanchang University, Jiangxi 330031, PR China
| | - Song He
- School of Materials Science and Engineering, Nanchang University, Jiangxi 330031, PR China
| | - Xueyou Song
- School of Materials Science and Engineering, Nanchang University, Jiangxi 330031, PR China
| | - Yahui Luo
- School of Materials Science and Engineering, Nanchang University, Jiangxi 330031, PR China
| | - Jie Zhao
- School of Materials Science and Engineering, Nanchang University, Jiangxi 330031, PR China
| | - Yanhe Xiao
- School of Materials Science and Engineering, Nanchang University, Jiangxi 330031, PR China
| | - Shuijin Lei
- School of Materials Science and Engineering, Nanchang University, Jiangxi 330031, PR China
| | - Cailei Yuan
- Jiangxi Key Laboratory of Nanomaterials and Sensors, School of Physics, Communication and Electronics, Jiangxi Normal University, Jiangxi 330022, PR China
| | - Baochang Cheng
- School of Materials Science and Engineering, Nanchang University, Jiangxi 330031, PR China; Nanoscale Science and Technology Laboratory, Institute for Advanced Study, Nanchang University, Jiangxi 330031, PR China.
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Zhou X, Lei S, Li L, Xu T, Gu W, Ma F, Yang R. [Peripheral blood EMR3 gene methylation level is correlated with breast cancer in Chinese women]. Nan Fang Yi Ke Da Xue Xue Bao 2021; 41:1456-1463. [PMID: 34755660 DOI: 10.12122/j.issn.1673-4254.2021.10.03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To explore the association of methylation levels of C19orf57, MAP9, EMR3, NEK6 and PCOLCE2 genes in peripheral blood with breast cancer (BC) in Chinese women. METHODS We collected peripheral blood samples from 258 early-stage BC patients and 272 healthy women. Agena matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF-MS) was utilized to quantitatively measure the methylation levels of CpG sites in the genes. The association between DNA methylation and BC was analyzed using a logistic regression model adjusted for covariants. Spearman's correlation analysis was performed to analyze the association between the gene methylation levels and age. The methylation levels of the genes in the BC patients with different clinical characteristics were investigated using non-parametric tests. RESULTS In stead of EMR3 gene hypermethylation as found in BC patients as found in the Caucasian population, EMR3 gene hypomethylation was found to correlate with BC in Chinese women, but this correlation was significant only in women beyond the age of 50 years (for every 10% reduction of the methylation level, EMR3_CpG_1: OR=1.40; EMR3_CpG_2: OR=2.31; EMR3_CpG_3: OR=2.76, P < 0.05). EMR3 methylation was not or was only weakly correlated with tumor stage, size, lymphatic metastasis, ER, PR, HER2, or Ki67. Our data did not show a correlation between C19orf57 methylation and BC. CONCLUSION Peripheral blood EMR3 gene hypomethylation is associated with BC in Chinese women, especially in those at an old age and in postmenopausal women.
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Affiliation(s)
- X Zhou
- Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - S Lei
- Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - L Li
- Department of Medical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100021, China
| | - T Xu
- Department of Clinical Laboratory, Jiangsu Provincial Hospital of Chinese Medicine, Nanjing 210029, China
| | - W Gu
- Department of Clinical Laboratory, Jiangsu Provincial Hospital of Chinese Medicine, Nanjing 210029, China
| | - F Ma
- Department of Medical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100021, China
| | - R Yang
- Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing 211166, China
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Chao Z, Xiaochen S, Shuyue W, Xiao S, Yaohui Y, Fei G, Lei S. A review about industrialization of Chinese materia medica decoction pieces. Pharmazie 2021; 75:540-547. [PMID: 33239126 DOI: 10.1691/ph.2020.0647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
Chinese materia medica decoction pieces (CMMDPs), one of the three pillars of the Chinese materia medica industry, are a key link in the Chinese materia medica industrial chain. Industrialization is the only way for the modernization of CMMDPs. This review mainly summarizes the characteristics, history, current situation and prospect of CMMDPs industry, providing a new reference for promoting the flourishing development of the industrialization of CMMDPs and for serving massive health industry. The literature was collected from databases including Web of Science, PubMed, Elsevier and CNKI (Chinese). CMMDPs industry has the characteristics of regionalism, resource dependency, customer diversity and low industrial concentration. Deeply processed products include traditional Chinese medicine (TCM) formula granules, small-packed decoction pieces, ultrafine decoction pieces, puffed decoction pieces, compressed decoction pieces and instant decoction pieces. Integration of treatment and processing at the place of origin is emerging. However, there is still room for improvement, for example, the manufacturing technologies of CMMDPs industry need to be continually improved. The management of CMMDPs' normalized production also needs to be strengthened. The quality of CMMDPs should be strengthened supervision and it should establish the objective and feasible quality evaluation system for CMMDPs. At present, China has attached unprecedented importance to the development of TCM, and issued a number of supporting policies, sparing no effort to support its development.
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Affiliation(s)
- Z Chao
- School of Pharmaceutical Sciences, Shandong University of Traditional Chinese Medicine, Jinan, PR China
| | - S Xiaochen
- School of Pharmaceutical Sciences, Shandong University of Traditional Chinese Medicine, Jinan, PR China
| | - W Shuyue
- School of Pharmaceutical Sciences, Shandong University of Traditional Chinese Medicine, Jinan, PR China
| | - S Xiao
- School of Pharmaceutical Sciences, Shandong University of Traditional Chinese Medicine, Jinan, PR China
| | - Y Yaohui
- School of Pharmaceutical Sciences, Shandong University of Traditional Chinese Medicine, Jinan, PR China
| | - G Fei
- The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, PR China;,
| | - S Lei
- Shandong University of Traditional Chinese Medicine, Jinan, PR China;,
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Lei S, Liu SY, Zhang Y, Jiang DJ, Xin JR, Zhao TY, Chen YQ, Zhang MB, Yang L. [Survey on present status of noise exposure of workers in metal processing industry]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2021; 39:540-543. [PMID: 34365769 DOI: 10.3760/cma.j.cn121094-20200630-00366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the distribution of noise exposure between non-steady state noise and steady-state noise for metal processing workers, which will provide scientific basis for the prevention and treatment of noise hazards in metal processing industry. Methods: The cross-section method was used to investigate the noise exposure of 737 workers from three metal processing industries in Zhejiang Province from October to December 2017. The general demographic information and occupational history were collected by questionnaire. The noise was recorded by individual noise meters, and the noise exposure intensity (equivalent continuous A-weighted noise exposure level normalized to an 8 h-working-day, L(Aeq, 8 h)) and kurtosis were calculated. Results: Workers exposed to noise in the metal processing industry were mainly 18-40 years old (527 workers, 71.51%) , men (570 workers, 77.34%) , and junior high school education background (416 workers, 56.45%) . There were 572 workers (77.61%) with noise exposure intensity (L(Aeq, 8 h)) greater than 85 dB (A) , 558 workers (75.71%) exposed to non-steady state noise (kurtosis ≥4) , and 634 workers (86.02%) with exposure duration less than 8 years. Among the 30 work types investigated, the work types with noise intensity reaching 100% were the stamping, welding and others from a children's car manufacturing factory in Ningbo, operating, chamfering, tapping, and thread rolling from an automobile parts manufacturing factory in Ningbo; The work types with a rate of 100% exposed to non-steady state noise were the grinding from a children's car manufacturing factory in Ningbo, assembling, assembly operating and others from an automobile brake manufacturing factory in Wenzhou, and polishing from an automobile parts manufacturing factory in Ningbo. Conclusion: Metal processing workers have a high rate of over-standard exposed to high noise intensity and a high proportion exposed to non-steady state noise. It is necessary to take sound insulation and noise reduction engineering control, and strengthen personal protection and occupational health management measures to prevent and control the noise hazards.
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Affiliation(s)
- S Lei
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
| | - S Y Liu
- School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Y Zhang
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
| | - D J Jiang
- Ningbo Municipal Center for Disease Control and Prevention, Ningbo 315010, China
| | - J R Xin
- School of Medicine, Hangzhou Normal University, Hangzhou 311121, China
| | - T Y Zhao
- School of Medicine, Hangzhou Normal University, Hangzhou 311121, China
| | - Y Q Chen
- School of Medicine, Hangzhou Normal University, Hangzhou 311121, China
| | - M B Zhang
- Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310000, China
| | - L Yang
- School of Medicine, Hangzhou Normal University, Hangzhou 311121, China
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Pepin A, Shah S, Pernia M, Lei S, Ayoob M, Danner M, Yung T, Collins B, Suy S, Aghdam N, Collins S. PO-1364 Bleeding Risk after Prostate SBRT in Men on Baseline Anticoagulant/Antiplatelet Therapy. Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)07815-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Lei S, Xiao Z. [Communication sound recognition and response modification in the secondary auditory cortex of female mice]. Nan Fang Yi Ke Da Xue Xue Bao 2021; 41:1079-1086. [PMID: 34308860 DOI: 10.12122/j.issn.1673-4254.2021.07.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To study the response characteristics of the secondary auditory cortex (A2) to wriggling calls (WC) and the mechanism of response modulation in female mice. METHODS We used patch-clamp and immunofluorescence labeling technique to mark and record the action potential and cell type of A2 neurons. Female C57 mice were stimulated with pure tone and white noise (control), 4.5 kHz, 9 kHz, or 13.5 kHz sound waves extracted from WC (single-frequency simulation group), the combinations of every two of the 3 single-frequency sound waves (two-tone frequency simulation group), or the combinations of 4.5 kHz+7.7 kHz+13.5 kHz and 4.5 kHz+9 kHz+13.5 kHz sound waves (three-frequency simulation group). The firing pattern, firing number, threshold, and latency of the action potential of the A2 neurons were recorded in response to the stimulations. RESULTS By comparison of the spikes elicited by different sound stimulations, we identified 3 types of neurons with different sensitivities to WC. The WC-sensitive neurons had a significantly greater number of spikes in response to WC than to other sounds and noise (P < 0.001). Comparison of the latency and threshold revealed significantly longer latencies of the WC-sensitive neurons and WC-insensitive neurons in response to WC stimulation than to pure tone stimulation (P=0.002), but their latencies to WC and noise stimulation were similar (P=0.093). The WC-sensitive neurons also had lower threshold to WC than to pure tone and noise stimulations (P=0.02). Analysis of the firing patterns of action potentials showed that the WCsensitive neurons consisted mainly of parvalbumin interneurons. The results of immunofluorescence labeling indicated that inhibitory interneurons were present in the A2 neurons that responded to WC. CONCLUSION A2 contains 3 types of neurons with different sensitivities to WC. Among them, the WC-sensitive neurons is mainly PV neurons, whose response characteristics to different types of sounds can help to explain the mechanism of communication sound recognition and response modification in A2.
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Affiliation(s)
- S Lei
- Department of Physiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Z Xiao
- Department of Physiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
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Ouyang Z, Huang Q, Xu C, Zhao J, Xiao Y, Lei S, Cheng B. Giant Piezoresistive Effect of CdS@C Hybrid Nanobelts for Volatile Real-Time Sensor and Erasable Nonvolatile Memory to Stress. ACS Appl Mater Interfaces 2021; 13:22785-22795. [PMID: 33960767 DOI: 10.1021/acsami.1c02571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Here, CdS@C nanohybrid composites, where CdS quantum dots (QDs) are uniformly embedded in carbon micro-/nanobelt matrixes, are synthesized via a combustion synthesis followed by a postvulcanization. In the nanohybrids, trap centers are effectively created by the introduction of QDs and moreover their barrier height and filling level can be effectively modulated through a coupling of externally loaded strain and bias. Thus, a single CdS@C micro-/nanobelt-based two-terminal device can exhibit an ultrahigh real-time response to compressive and tensile strains with a tremendous gauge factor of above 104, high sensitivity, and fast response and recovery. More importantly, the trapped charges can be mechanically excited by stress, and furthermore, the stress-triggered high-resistance state can be well-maintained at room temperature and a relatively low operation bias. However, it can be back to its initial low resistance state by loading a relatively large bias, showing a superior erasable stress memory function with a window of about 103. By an effective construction of trap centers in hybrid composites, not only can an ultrahigh performance of volatile real-time stress sensor be obtained under the synergism of external stress and electric field but also can an outstanding erasable nonvolatile stress memory be successfully realized.
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Affiliation(s)
- Zhiyong Ouyang
- Nanoscale Science and Technology Laboratory, Institute for Advanced Study, Nanchang University, Jiangxi 330031, P. R. China
| | - Qianfei Huang
- School of Information Engineering, Jiangxi Modern Polytechnic College, Jiangxi 330095, P. R. China
| | - Changsen Xu
- Nanoscale Science and Technology Laboratory, Institute for Advanced Study, Nanchang University, Jiangxi 330031, P. R. China
| | - Jie Zhao
- School of Materials Science and Engineering, Nanchang University, Jiangxi 330031, P. R. China
| | - Yanhe Xiao
- School of Materials Science and Engineering, Nanchang University, Jiangxi 330031, P. R. China
| | - Shuijin Lei
- School of Materials Science and Engineering, Nanchang University, Jiangxi 330031, P. R. China
| | - Baochang Cheng
- Nanoscale Science and Technology Laboratory, Institute for Advanced Study, Nanchang University, Jiangxi 330031, P. R. China
- School of Materials Science and Engineering, Nanchang University, Jiangxi 330031, P. R. China
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Li M, Tian J, Xu Z, Zeng Q, Chen W, Lei S, Wei X. Histology-based profile of inflammatory mediators in experimentally induced pulpitis in a rat model: screening for possible biomarkers. Int Endod J 2021; 54:1328-1341. [PMID: 33715185 PMCID: PMC8360108 DOI: 10.1111/iej.13514] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 03/08/2021] [Indexed: 02/06/2023]
Abstract
Aim To profile molecular changes in lipopolysaccharide (LPS)‐induced experimental pulpitis in a rat model and explore the feasibility of a molecular‐based diagnostic strategy for pulpitis. Methodology Seventy‐three maxillary incisors of Sprague‐Dawley rats were used to establish pulpitis models with LPS. Inflammatory grading was performed in four equal sections of the pulp divided from the injured site to the root apex. An antibody array was used to compare the expression of 67 molecules between control pulp and inflamed pulp 12 and 72 h after LPS application. The levels of differentially expressed molecules in the control and inflamed pulp (collected at 3, 6, 9, 12, 24 and 72 h after LPS treatment) were examined via ELISA, and correlations between inflammatory scores and molecule expression were assessed. The molecule distributions in the pulp were investigated by immunofluorescence staining. Data were analysed with paired t‐test, one‐way anova, Kruskal–Wallis tests, and Spearman’s and Pearson’s correlations with significance set at P < 0.05. Results Polymorphonuclear neutrophils were observed in the injured site 3 h after LPS stimulation. Inflammatory infiltration peaked at 12 h and was limited to the injured site with osteodentine deposition at 72 h. Thirteen molecules were significantly differentially expressed between the control and LPS‐injured pulp. ELISA validated that tissue inhibitor of metalloproteinase‐1 (TIMP‐1) expression dramatically peaked at 12 h (compared with other time points, P < 0.05) and returned to baseline at 72 h. The TIMP‐1 concentration was strongly correlated with inflammation severity in the apical three‐quarters of the pulp, and the strongest correlation was found in the lower‐middle quarter (r = 0.786, P < 0.001). Immunofluorescence staining revealed that in the apical three‐quarters of the pulp, TIMP‐1 expression was significantly higher in the 12 h group than in the control and 3, 6, 24 and 72 h groups (P < 0.01). Conclusion This study provides a molecular profile of LPS‐induced pulpitis in a rat model. TIMP‐1 had a strong positive correlation with the severity of dental pulp inflammation, verifying the feasibility of applying biomarkers to identify specific pathological conditions in pulpitis.
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Affiliation(s)
- M Li
- Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - J Tian
- Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - Z Xu
- Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - Q Zeng
- Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - W Chen
- Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - S Lei
- Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - X Wei
- Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
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Kong Y, Ding RJ, Lei S, Wang L, Xia K, Jiang HY, Zhang LJ, Yao DK, Ma WL, Hu DY. [An analysis of insomnia and its influencing factors in patients with acute coronary syndrome]. Zhonghua Nei Ke Za Zhi 2021; 60:331-337. [PMID: 33765702 DOI: 10.3760/cma.j.cn112138-20200420-00398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the current situation of insomnia in patients with acute coronary syndrome (ACS), and analyze the influencing factors of insomnia in the ACS patients, so as to provide information on the development of new strategies for the treatment of insomnia in ACS patients. Methods: This is a multicenter and prospective observational study. A total of 771 ACS patients who met the criteria were selected from March 2013 to June 2015. The baseline social demographic information, sleep quality questionnaire, general anxiety disorder scale-7(GAD-7),patient health questionnaire-9(PHQ-9), short-form 12 health survey questionnaire(SF-12), and enhancing recovery in coronary heart disease patients social inventory(ESSI) were completed within 7 days after admission. Logistic regression analyses were used to analyze the influencing factors of insomnia in ACS patients. Results: A total of 741 subjects with valid questionnaires were collected, including 510 males (68.8%) and 231 females (31.2%). Among them, 487 (65.7%) subjects had at least one insomnia symptom: 308 (41.6%) subjects had difficulty in falling asleep, 369 (49.8%) subjects were easy to wake at night, 116 (15.7%) subjects woke up earlier than they expected, 74 (10.0%) subjects experienced both woke up earlier and difficulty in falling asleep, and 53 (7.2%) subjects woke up earlier, woke up at night and had difficulty in falling asleep at the same time. Logistic regression analyses showed that before admission physical activity (OR =0.636, 95%CI 0.411-0.984), depression (OR=1.908, 95%CI 1.101-3.305) and low social support (OR=0.278, 95%CI 1.198-3.301) were independent factors of insomnia in ACS patients. Conclusions: Nearly 2/3 ACS patients have symptoms of insomnia. Difficulty in falling asleep and easy to wake up at night are the most common manifestations. Physical activity, depression and social support independently are associated with insomnia.
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Affiliation(s)
- Y Kong
- Department of Cardiovascular Medicine, the First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - R J Ding
- Cardiology Center, People's Hospital of Peking University ,Beijing100044, China
| | - S Lei
- Department of Cardiovascular Medicine, the First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - L Wang
- Department of Cardiovascular Medicine, the First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - K Xia
- Department of Cardiology , Beijing Chaoyang Hospital Affiliated to Capital Medical University ,Beijing 100020, China
| | - H Y Jiang
- Department of Cardiology, Beijing First Hospital of Integrated Traditional Chinese And Western Medicine,Beijing 100026, China
| | - L J Zhang
- Department of Cardiology, Dongzhimen Hospital, Beijing University of Traditional Chinese Medicine, Beijing 100700, China
| | - D K Yao
- Department of Cardiology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - W L Ma
- Department of Cardiology, Tongji Hospital, Tongji University, Shanghai 200065, China
| | - D Y Hu
- Cardiology Center, People's Hospital of Peking University ,Beijing100044, China
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Xiong J, Bian Q, Lei S, Deng Y, Zhao K, Sun S, Fu Q, Xiao Y, Cheng B. Bi 19S 27I 3 nanorods: a new candidate for photothermal therapy in the first and second biological near-infrared windows. Nanoscale 2021; 13:5369-5382. [PMID: 33660720 DOI: 10.1039/d0nr09137e] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Near-infrared (NIR) light-induced photothermal cancer therapy using nanomaterials as photothermal agents has attracted considerable research interest over the past few years. As the key factor in photothermal therapy systems, a variety of photothermal agents have been developed. However, the exploration of novel photothermal therapy nanoplatforms with high NIR absorption remains a significant challenge, especially those working in both NIR-I and NIR-II windows. In this work, Bi19S27I3 nanorods with remarkably high absorption covering the whole visible light to the entire NIR-I and NIR-II regions have been successfully prepared through a facile solvothermal approach. The as-synthesized Bi19S27I3 nanorods have a high photothermal conversion efficiency of 42.7% at 808 nm (NIR-I) and 41.5% at 1064 nm (NIR-II), making them a promising candidate for photothermal therapy. In vitro cell viability assay reveals that the Bi19S27I3 sample has good biocompatibility and exhibits significant cell-killing effect under NIR irradiation. In vivo anti-tumor experiments demonstrate that the tumor growth can be effectively inhibited by fatal hyperthermia ablation mediated by Bi19S27I3 nanorods under the irradiation of an 808 nm or 1064 nm laser. Therefore, this study should be primarily beneficial for the development of new materials for NIR photothermal therapy applications.
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Affiliation(s)
- Jinsong Xiong
- School of Materials Science and Engineering, Nanchang University, Nanchang, Jiangxi 330031, P. R. China.
| | - Qinghuan Bian
- School of Materials Science and Engineering, Nanchang University, Nanchang, Jiangxi 330031, P. R. China.
| | - Shuijin Lei
- School of Materials Science and Engineering, Nanchang University, Nanchang, Jiangxi 330031, P. R. China.
| | - Yatian Deng
- School of Materials Science and Engineering, Nanchang University, Nanchang, Jiangxi 330031, P. R. China.
| | - Kehan Zhao
- School of Materials Science and Engineering, Nanchang University, Nanchang, Jiangxi 330031, P. R. China.
| | - Shunqiang Sun
- School of Materials Science and Engineering, Nanchang University, Nanchang, Jiangxi 330031, P. R. China.
| | - Qi Fu
- School of Materials Science and Engineering, Nanchang University, Nanchang, Jiangxi 330031, P. R. China.
| | - Yanhe Xiao
- School of Materials Science and Engineering, Nanchang University, Nanchang, Jiangxi 330031, P. R. China.
| | - Baochang Cheng
- School of Materials Science and Engineering, Nanchang University, Nanchang, Jiangxi 330031, P. R. China.
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Jay MA, Arat A, Wijlaars L, Ajetunmobi O, Fitzpatrick T, Lu H, Lei S, Skerritt C, Goldfeld S, Gissler M, Gunnlaugsson G, Hrafn Jónsson S, Hjern A, Guttmann A, Gilbert R. Timing of paediatric orchidopexy in universal healthcare systems: international administrative data cohort study. BJS Open 2020; 4:1117-1124. [PMID: 32706149 PMCID: PMC7709362 DOI: 10.1002/bjs5.50329] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 06/24/2020] [Indexed: 01/23/2023] Open
Abstract
BACKGROUND International guidelines in 2008 recommended orchidopexy for undescended testis at 6-12 months of age to reduce the risk of testicular cancer and infertility. Using administrative data from England, Finland, Ontario (Canada), Scotland and Sweden (with data from Victoria (Australia) and Iceland in supplementary analyses), the aim of this study was to investigate compliance with these guidelines and identify potential socioeconomic inequities in the timing of surgery before 1 and 3 years. METHODS All boys born in 2003-2011 with a diagnosis code of undescended testis and procedure codes indicating orchidopexy before their fifth birthday were identified from administrative health records. Trends in the proportion of orchidopexies performed before 1 and 3 years of age were investigated, as were socioeconomic inequities in adherence to the guidelines. RESULTS Across all jurisdictions, the proportion of orchidopexies occurring before the first birthday increased over the study period. By 2011, from 7·6 per cent (Sweden) to 27·9 per cent (Scotland) of boys had undergone orchidopexy by their first birthday and 71·5 per cent (Sweden) to 90·4 per cent (Scotland) by 3 years of age. There was limited evidence of socioeconomic inequities for orchidopexy before the introduction of guidelines (2008). Across all jurisdictions for boys born after 2008, there was consistent evidence of inequities in orchidopexy by the first birthday, favouring higher socioeconomic position. Absolute differences in these proportions between the highest and lowest socioeconomic groups ranged from 2·5 to 5·9 per cent across jurisdictions. CONCLUSION Consistent lack of adherence to the guidelines across jurisdictions questions whether the guidelines are appropriate.
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Affiliation(s)
- M. A. Jay
- Population Policy and Practice Research and Teaching DepartmentUniversity College London Great Ormond Street Institute of Child HealthLondonUK
| | - A. Arat
- Clinical Epidemiology, Department of Medicine, Karolinska Institutet and Centre for Health Equity StudiesStockholmSweden
| | - L. Wijlaars
- Population Policy and Practice Research and Teaching DepartmentUniversity College London Great Ormond Street Institute of Child HealthLondonUK
| | - O. Ajetunmobi
- Population Policy and Practice Research and Teaching DepartmentUniversity College London Great Ormond Street Institute of Child HealthLondonUK
| | | | | | - S. Lei
- Murdoch Children's Research Institute, The Royal Children's HospitalAustralia
| | - C. Skerritt
- Bristol Royal Hospital for ChildrenBristolUK
| | - S. Goldfeld
- Murdoch Children's Research Institute, The Royal Children's HospitalAustralia
- Department of PaediatricsUniversity of MelbourneParkvilleVictoriaAustralia
| | - M. Gissler
- Department of Neurobiology, Care Sciences and SocietyKarolinska InstitutetHuddingeSweden
- Information Services DepartmentFinnish Institute for Health and WelfareHelsinkiFinland
| | - G. Gunnlaugsson
- Faculty of Sociology, Anthropology and FolkloristicsUniversity of IcelandReykjavíkIceland
| | - S. Hrafn Jónsson
- Faculty of Sociology, Anthropology and FolkloristicsUniversity of IcelandReykjavíkIceland
| | - A. Hjern
- Clinical Epidemiology, Department of Medicine, Karolinska Institutet and Centre for Health Equity StudiesStockholmSweden
| | - A. Guttmann
- Child Health Evaluative SciencesCanada
- Division of Paediatric Medicine, Hospital for Sick ChildrenCanada
- ICESCanada
- Dalla Lana School of Public HealthCanada
- Department of PaediatricsUniversity of TorontoTorontoOntarioCanada
| | - R. Gilbert
- Population Policy and Practice Research and Teaching DepartmentUniversity College London Great Ormond Street Institute of Child HealthLondonUK
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Shu L, Ke S, Fei L, Huang W, Wang Z, Gong J, Jiang X, Wang L, Li F, Lei S, Rao Z, Zhou Y, Zheng RK, Yao X, Wang Y, Stengel M, Catalan G. Photoflexoelectric effect in halide perovskites. Nat Mater 2020; 19:605-609. [PMID: 32313265 DOI: 10.1038/s41563-020-0659-y] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 03/06/2020] [Indexed: 05/28/2023]
Abstract
Harvesting environmental energy to generate electricity is a key scientific and technological endeavour of our time. Photovoltaic conversion and electromechanical transduction are two common energy-harvesting mechanisms based on, respectively, semiconducting junctions and piezoelectric insulators. However, the different material families on which these transduction phenomena are based complicate their integration into single devices. Here we demonstrate that halide perovskites, a family of highly efficient photovoltaic materials1-3, display a photoflexoelectric effect whereby, under a combination of illumination and oscillation driven by a piezoelectric actuator, they generate orders of magnitude higher flexoelectricity than in the dark. We also show that photoflexoelectricity is not exclusive to halides but a general property of semiconductors that potentially enables simultaneous electromechanical and photovoltaic transduction and harvesting in unison from multiple energy inputs.
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Affiliation(s)
- Longlong Shu
- School of Materials Science and Engineering, Nanchang University, Nanchang, People's Republic of China.
| | - Shanming Ke
- School of Materials Science and Engineering, Nanchang University, Nanchang, People's Republic of China
| | - Linfeng Fei
- School of Materials Science and Engineering, Nanchang University, Nanchang, People's Republic of China
| | - Wenbin Huang
- The State Key Lab of Mechanical Transmissions, Chongqing University, Chongqing, People's Republic of China
| | - Zhiguo Wang
- The State Key Lab of Mechanical Transmissions, Chongqing University, Chongqing, People's Republic of China
| | - Jinhui Gong
- School of Materials Science and Engineering, Nanchang University, Nanchang, People's Republic of China
| | - Xiaoning Jiang
- Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC, USA
| | - Li Wang
- School of Materials Science and Engineering, Nanchang University, Nanchang, People's Republic of China
| | - Fei Li
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education and International Center for Dielectric Research, Xi'an Jiao Tong University, Xi'an, People's Republic of China
| | - Shuijin Lei
- School of Materials Science and Engineering, Nanchang University, Nanchang, People's Republic of China
| | - Zhenggang Rao
- School of Materials Science and Engineering, Nanchang University, Nanchang, People's Republic of China
| | - Yangbo Zhou
- School of Materials Science and Engineering, Nanchang University, Nanchang, People's Republic of China
| | - Ren-Kui Zheng
- School of Materials Science and Engineering, Nanchang University, Nanchang, People's Republic of China
| | - Xi Yao
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education and International Center for Dielectric Research, Xi'an Jiao Tong University, Xi'an, People's Republic of China
| | - Yu Wang
- School of Materials Science and Engineering, Nanchang University, Nanchang, People's Republic of China
| | - Massimiliano Stengel
- Institucio Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Catalonia
- Institut de Ciencia de Materials de Barcelona (ICMAB), Consejo Superior de Investigaciones Científicas (CSIC), Campus Universitat Autonoma de Barcelona, Barcelona, Catalonia
| | - Gustau Catalan
- Institucio Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Catalonia.
- Institut Catala de Nanociencia i Nanotecnologia (ICN2), Consejo Superior de Investigaciones Científicas and The Barcelona Institute of Science and Technology (CSIC-BIST), Campus Universitat Autonoma de Barcelona, Barcelona, Catalonia.
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Xu Y, Fu Q, Lei S, Xiong J, Sun S, Bian Q, Xiao Y, Cheng B. Wurtzite CuNi 2InS 4 Nanocrystals: A Quaternary Chalcogenide Magnetic Semiconductor. Inorg Chem 2019; 58:15283-15290. [PMID: 31701750 DOI: 10.1021/acs.inorgchem.9b02285] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
For the first time, quaternary chalcogenide CuNi2InS4 nanocrystals with a wurtzite structure have been designed and fabricated as a new magnetic semiconductor. The phase structure analysis suggests that the synthesized wurtzite CuNi2InS4 phase has a disordered structure in which Cu+, Ni2+, and In3+ ions share the same lattice site of the unit cell with a random cation distribution. The prepared CuNi2InS4 nanocrystals have uniform bullet-like morphology, small size distribution, good monodispersity, and high crystallinity. The magnetic properties investigation reveals that the wurtzite CuNi2InS4 nanocrystals can exhibit a weak ferromagnetic moment with the blocking temperature at around 13 K thanks to the disordered wurtzite structure and the high content of magnetic Ni2+ ions. As for the semiconducting properties, the as-obtained wurtzite CuNi2InS4 nanocrystals show a strong and broad visible light absorption and have a direct bandgap of 1.45 eV. Due to their favorable optical properties, the fabricated thin film of CuNi2InS4 nanocrystals exhibits a good photoelectric response to the solar spectrum, which makes the obtained new phase potential candidate for applications in the photovoltaics. This work demonstrates a new metastable I-II2-III-VI4 chalcogenide that can be used to render multiple functionalities and applications.
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Affiliation(s)
- Yueling Xu
- School of Materials Science and Engineering , Nanchang University , Nanchang , Jiangxi 330031 , China
| | - Qi Fu
- School of Materials Science and Engineering , Nanchang University , Nanchang , Jiangxi 330031 , China
| | - Shuijin Lei
- School of Materials Science and Engineering , Nanchang University , Nanchang , Jiangxi 330031 , China
| | - Jinsong Xiong
- School of Materials Science and Engineering , Nanchang University , Nanchang , Jiangxi 330031 , China
| | - Shunqiang Sun
- School of Materials Science and Engineering , Nanchang University , Nanchang , Jiangxi 330031 , China
| | - Qinghuan Bian
- School of Materials Science and Engineering , Nanchang University , Nanchang , Jiangxi 330031 , China
| | - Yanhe Xiao
- School of Materials Science and Engineering , Nanchang University , Nanchang , Jiangxi 330031 , China
| | - Baochang Cheng
- School of Materials Science and Engineering , Nanchang University , Nanchang , Jiangxi 330031 , China
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43
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Wang E, Aziz A, Danner M, Yung T, Ayoob M, Lei S, Rashid A, Dritschilo A, Lischalk J, Collins B, Lynch J, Suy S, Aghdam N, Collins S. Patterns of Recurrence Following Stereotactic Body Radiation Therapy for Localized Prostate Cancer. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.1782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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44
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Zhang R, Rao Z, Li Y, Li H, Fei L, Lei S, Wang Y. Silkworm Excrement Derived In‐situ Co‐doped Nanoporous Carbon as Confining Sulfur Host for Lithium Sulfur Batteries. ChemistrySelect 2019. [DOI: 10.1002/slct.201901082] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Rong Zhang
- School of Materials Science and EngineeringNanchang University, Nanchang Jiangxi 330031 China
| | - Zhenggang Rao
- School of Materials Science and EngineeringNanchang University, Nanchang Jiangxi 330031 China
| | - Yong Li
- School of Materials Science and EngineeringNanchang University, Nanchang Jiangxi 330031 China
| | - Hongyi Li
- School of Materials Science and EngineeringNanchang University, Nanchang Jiangxi 330031 China
| | - Linfeng Fei
- Department of Applied PhysicsThe Hong Kong Polytechnic University Hong Kong SAR PR China
| | - Shuijin Lei
- School of Materials Science and EngineeringNanchang University, Nanchang Jiangxi 330031 China
| | - Yu Wang
- School of Materials Science and EngineeringNanchang University, Nanchang Jiangxi 330031 China
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Wang S, Zhao J, Tong T, Cheng B, Xiao Y, Lei S. Bias-Controlled Tunable Electronic Transport with Memory Characteristics in an Individual ZnO Nanowire for Realization of a Self-Driven UV Photodetector with Two Symmetrical Electrodes. ACS Appl Mater Interfaces 2019; 11:14932-14943. [PMID: 30920194 DOI: 10.1021/acsami.9b00267] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
ZnO nanostructures are exceedingly important building blocks for nanodevices due to their wide band gap and large exciton binding energy. However, their electronic transport characteristics are unstable and unrepeatable with external environment variation. Here, we demonstrate that electron transport of an individual ZnO nanowire-based device with the two same electrodes can be controllably modulated by applying a relatively large uni-/bidirectional bias. After being modulated, moreover, their electrical properties can well be maintained at relatively low operation bias and room temperature, demonstrating a memory behavior. The presence of surface states related to lattice periodicity breaking and traps associated with oxygen vacancy (Vo) and zinc interstitial (Zni) deep-level defects plays a crucial role in tunable electron transport with a memory feature. For the single nanowire-based two-terminal device, two back-to-back connected surface barrier diodes with series resistance are formed. The filling and emptying of traps near two end electrodes can remarkably adjust the width and height of the surface barrier. At a relatively low bias, the unmodulated conductance is governed by the electron hopping of bulk traps since the height of emptied traps is higher than that of the surface barrier, whereas at a relatively large bias, it is dominated by thermion emission due to a dramatic decrease of the surface barrier width resulting from the electron injection into traps from a negative electrode. Moreover, it will be beneficial for a thin surface barrier to penetrate UV light and separate photoexcited electron-hole pairs. After being asymmetrically modulated by a unidirectional injection, it can be successfully applied to realize a self-driven UV photodetector based on a photovoltaic effect in the symmetrical two-electrode structure. Our work provides a new route to tune electrical properties of nanostructures, which may inspire the development of novel electronic and optoelectronic devices.
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46
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Chambonneau M, Wang X, Yu X, Li Q, Chaudanson D, Lei S, Grojo D. Positive- and negative-tone structuring of crystalline silicon by laser-assisted chemical etching. Opt Lett 2019; 44:1619-1622. [PMID: 30933105 DOI: 10.1364/ol.44.001619] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Accepted: 02/24/2019] [Indexed: 06/09/2023]
Abstract
We demonstrate a structuring method for crystalline silicon using nanosecond laser internal irradiation followed by chemical etching. We show a dramatic dependence of the etch rate on the laser-writing speed. Enhanced isotropic etch rates of silicon by laser-induced internal damage were recently demonstrated with strong acids, but our results add the possibility to obtain reduced etch rates leading to different topographies. Material analyses indicate the possibility to efficiently produce high-aspect ratio channels, thanks to laser-induced porosities, as well as silicon micro-bumps due to highly stressed regions. This holds promises for fabricating microfluidic, photovoltaic, and micro-electromechanical systems.
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Stoica VA, Laanait N, Dai C, Hong Z, Yuan Y, Zhang Z, Lei S, McCarter MR, Yadav A, Damodaran AR, Das S, Stone GA, Karapetrova J, Walko DA, Zhang X, Martin LW, Ramesh R, Chen LQ, Wen H, Gopalan V, Freeland JW. Optical creation of a supercrystal with three-dimensional nanoscale periodicity. Nat Mater 2019; 18:377-383. [PMID: 30886403 DOI: 10.1038/s41563-019-0311-x] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Accepted: 02/04/2019] [Indexed: 06/09/2023]
Abstract
Stimulation with ultrafast light pulses can realize and manipulate states of matter with emergent structural, electronic and magnetic phenomena. However, these non-equilibrium phases are often transient and the challenge is to stabilize them as persistent states. Here, we show that atomic-scale PbTiO3/SrTiO3 superlattices, counterpoising strain and polarization states in alternate layers, are converted by sub-picosecond optical pulses to a supercrystal phase. This phase persists indefinitely under ambient conditions, has not been created via equilibrium routes, and can be erased by heating. X-ray scattering and microscopy show this unusual phase consists of a coherent three-dimensional structure with polar, strain and charge-ordering periodicities of up to 30 nm. By adjusting only dielectric properties, the phase-field model describes this emergent phase as a photo-induced charge-stabilized supercrystal formed from a two-phase equilibrium state. Our results demonstrate opportunities for light-activated pathways to thermally inaccessible and emergent metastable states.
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Affiliation(s)
- V A Stoica
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA, USA
| | - N Laanait
- Center for Nanophase Materials Sciences, Oak Ridge, TN, USA
| | - C Dai
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA, USA
| | - Z Hong
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA, USA
| | - Y Yuan
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA, USA
| | - Z Zhang
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL, USA
| | - S Lei
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA, USA
| | - M R McCarter
- Department of Materials Science and Engineering, University of California, Berkeley, CA, USA
| | - A Yadav
- Department of Materials Science and Engineering, University of California, Berkeley, CA, USA
| | - A R Damodaran
- Department of Materials Science and Engineering, University of California, Berkeley, CA, USA
| | - S Das
- Department of Materials Science and Engineering, University of California, Berkeley, CA, USA
| | - G A Stone
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA, USA
| | - J Karapetrova
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL, USA
| | - D A Walko
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL, USA
| | - X Zhang
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL, USA
| | - L W Martin
- Department of Materials Science and Engineering, University of California, Berkeley, CA, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - R Ramesh
- Department of Materials Science and Engineering, University of California, Berkeley, CA, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - L-Q Chen
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA, USA
| | - H Wen
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL, USA
| | - V Gopalan
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA, USA.
| | - J W Freeland
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL, USA.
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48
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Aghdam N, Katarian S, Danner M, Ayoob M, Yung T, Lei S, Kumar D, Collins B, Lischalk J, Dritschilo A, Suy S, Lynch J, Collins S. PO-0852 Stereotactic Body Radiation Therapy for Unfavorable Prostate Cancer: Large institutional experience. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)31272-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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49
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Pradhan S, Ran X, Xu X, Yang Y, Lei S, Ran Y. Image Gallery: Dermoscopy of perianal molluscum contagiosum in a child caused by molluscum contagiosum virus subtype I. Br J Dermatol 2019; 180:e68. [PMID: 30821395 DOI: 10.1111/bjd.17401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- S Pradhan
- Department of Dermatovenereology, Sichuan University, Chengdu, 610041, China
| | - X Ran
- Department of Dermatovenereology, Sichuan University, Chengdu, 610041, China
| | - X Xu
- Department of Dermatovenereology, Sichuan University, Chengdu, 610041, China
| | - Y Yang
- Department of Dermatovenereology, Sichuan University, Chengdu, 610041, China
| | - S Lei
- Department of Pathology, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Y Ran
- Department of Dermatovenereology, Sichuan University, Chengdu, 610041, China
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50
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Hong Z, Zhao J, Li S, Cheng B, Xiao Y, Lei S. Tunable hysteresis behaviour related to trap filling dependence of surface barrier in an individual CH 3NH 3PbI 3 micro/nanowire. Nanoscale 2019; 11:3360-3369. [PMID: 30724937 DOI: 10.1039/c8nr08934e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Hybrid organic-inorganic perovskite (HOIP) materials have remarkable potential in solar cells owing to their high power conversion efficiency and inexpensive preparation. However, their current-voltage (I-V) curves often exhibit hysteresis characteristics, which not only strongly affect the accuracy of measurements but also seriously impair device performance, and, moreover, their actual origin is still the subject of debate. Here, a single HOIP micro/nanowire-based two-terminal device was constructed. Not only can its hysteresis properties be accurately modulated, but also their origin can clearly be identified as variations in the surface barrier related to trap filling. Under illumination of the entire device with visible (VIS) light, two anticlockwise hysteresis loops appear symmetrically in cyclic I-V curves. Interestingly, the cyclic I-V curves can be switchably changed into asymmetrical "8"-shaped hysteresis loops with bipolar resistive switching (RS) features when only the vicinity of one electrode is illuminated. The traps located in the surface space charge region play a crucial role in the tunable hysteresis behaviour. Owing to the presence of abundant surface states, two back-to-back connected diodes related to the surface barrier can be formed in the two-terminal device. With the synergistic assistance of illumination and bias, moreover, the injection and extraction of holes in the surface space charge region can effectively modulate the surface barrier, which triggers the formation of a bipolar RS device. Accordingly, two switchable back-to-back connected bipolar RS devices were built. Regarding the tunable hysteresis with nonvolatile memory properties controlled by the synergistic action of bias and illumination, our results provide a valuable insight into the identification of its origin and, furthermore, also indicate that the HOIP materials have significant potential in nonvolatile memory applications.
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Affiliation(s)
- Zhen Hong
- School of Materials Science and Engineering, Nanchang University, Jiangxi 330031, P. R. China.
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