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Yu H, Zhang F, Chen Q, Zhou PK, Xing W, Wang S, Zhang G, Jiang Y, Chen X. Vinyl-Group-Anchored Covalent Organic Framework for Promoting the Photocatalytic Generation of Hydrogen Peroxide. Angew Chem Int Ed Engl 2024; 63:e202402297. [PMID: 38488772 DOI: 10.1002/anie.202402297] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Indexed: 04/17/2024]
Abstract
The artificial photosynthesis of H2O2 from water and oxygen using semiconductor photocatalysts is attracting increasing levels of attention owing to its green, environmentally friendly, and energy-saving characteristics. Although covalent organic frameworks (COFs) are promising materials for promoting photocatalytic H2O2 production owing to their structural and functional diversity, they typically suffer from low charge-generation and -transfer efficiencies as well as rapid charge recombination, which restricts their use as catalysts for photocatalytic H2O2 production. Herein, we report a strategy for anchoring vinyl moieties to a COF skeleton to facilitate charge separation and migration, thereby promoting photocatalytic H2O2 generation. This vinyl-group-bearing COF photocatalyst exhibits a H2O2-production rate of 84.5 μmol h-1 (per 10 mg), which is ten-times higher than that of the analog devoid of vinyl functionality and superior to most reported COF photocatalysts. Both experimental and theoretical studies provide deep insight into the origin of the improved photocatalytic performance. These findings are expected to facilitate the rational design and modification of organic semiconductors for use in photocatalytic applications.
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Affiliation(s)
- Hong Yu
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecular Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Fengtao Zhang
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecular Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Qian Chen
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecular Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Pan-Ke Zhou
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecular Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Wandong Xing
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecular Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Sibo Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecular Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Guigang Zhang
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecular Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Yi Jiang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China
| | - Xiong Chen
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecular Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
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Xu H, Xia S, Li C, Li Y, Xing W, Jiang Y, Chen X. Programming Tetrathiafulvalene-Based Covalent Organic Frameworks for Promoted Photoinduced Molecular Oxygen Activation. Angew Chem Int Ed Engl 2024:e202405476. [PMID: 38706228 DOI: 10.1002/anie.202405476] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 04/23/2024] [Accepted: 05/05/2024] [Indexed: 05/07/2024]
Abstract
Despite the pivotal role of molecular oxygen (O2) activation in artificial photosynthesis, the activation efficiency is often restricted by sluggish exciton dissociation and charge transfer kinetics within polymer photocatalysts. Herein, we propose two tetrathiafulvalene (TTF)-based imine-linked covalent organic frameworks (COFs) with tailored donor-acceptor (D-A) structures, TTF-PDI-COF and TTF-TFPP-COF, to promote O2 activation. Because of enhanced electron push-pull interactions that facilitated charge separation and transfer behavior, TTF-PDI-COF exhibited superior photocatalytic activity in electron-induced O2 activation reactions over TTF-TFPP-COF under visible light irradiation, including the photosynthesis of (E)-3-amino-2-thiocyano-α,β-unsaturated compounds and H2O2. These findings highlight the significant potential of the rational design of COFs with D-A configurations as suitable candidates for advanced photocatalytic applications.
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Affiliation(s)
- Hetao Xu
- Fuzhou University, College of Chemistry, Fuzhou, CHINA
| | - Shuling Xia
- Fuzhou University, College of Chemistry, Fuzhou, CHINA
| | - Chunlei Li
- Fuzhou University, College of Chemistry, Fuzhou, CHINA
| | - Yang Li
- Fuzhou University, College of Chemistry, Fuzhou, CHINA
| | - Wandong Xing
- Fuzhou University, College of Chemistry, Fuzhou, CHINA
| | - Yi Jiang
- Donghua University, College of Materials Science and Engineering, Shanghai, CHINA
| | - Xiong Chen
- Fuzhou University, College of chemistry, No.2, Xue Yuan Road, University Town, 350116, Fuzhou, CHINA
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3
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Xue S, Wei C, Shen M, Liang X, Wang J, Yang C, Xing W, Wang S, Lin W, Yu Z, Hou Y, Yu JC, Wang X. Enriching surface-ordered defects on WO 3 for photocatalytic CO 2-to-CH 4 conversion by water. Proc Natl Acad Sci U S A 2024; 121:e2319751121. [PMID: 38662548 PMCID: PMC11066983 DOI: 10.1073/pnas.2319751121] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 03/04/2024] [Indexed: 05/05/2024] Open
Abstract
Defect engineering has been widely applied in semiconductors to improve photocatalytic properties by altering the surface structures. This study is about the transformation of inactive WO3 nanosheets to a highly effective CO2-to-CH4 conversion photocatalyst by introducing surface-ordered defects in abundance. The nonstoichiometric WO3-x samples were examined by using aberration-corrected electron microscopy. Results unveil abundant surface-ordered terminations derived from the periodic {013} stacking faults with a defect density of 20.2%. The {002} surface-ordered line defects are the active sites for fixation CO2, transforming the inactive WO3 nanosheets into a highly active catalyst (CH4: O2 = 8.2: 16.7 μmol h-1). We believe that the formation of the W-O-C-W-O species is a critical step in the catalytic pathways. This work provides an atomic-level comprehension of the structural defects of catalysts for activating small molecules.
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Affiliation(s)
- Sikang Xue
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou350108, People’s Republic of China
- Fujian Science & Technology Innovation Laboratory for Chemical Engineering of China, College of Chemical Engineering, Fuzhou University, Quanzhou362114, People’s Republic of China
| | - Changgeng Wei
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou350108, People’s Republic of China
| | - Min Shen
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou350108, People’s Republic of China
| | - Xiaocong Liang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou350108, People’s Republic of China
| | - Jiali Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou350108, People’s Republic of China
| | - Can Yang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou350108, People’s Republic of China
| | - Wandong Xing
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou350108, People’s Republic of China
| | - Sibo Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou350108, People’s Republic of China
| | - Wei Lin
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou350108, People’s Republic of China
| | - Zhiyang Yu
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou350108, People’s Republic of China
| | - Yidong Hou
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou350108, People’s Republic of China
| | - Jimmy C. Yu
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou350108, People’s Republic of China
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong999077, People’s Republic of China
| | - Xinchen Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou350108, People’s Republic of China
- Fujian Science & Technology Innovation Laboratory for Chemical Engineering of China, College of Chemical Engineering, Fuzhou University, Quanzhou362114, People’s Republic of China
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Zhao L, Zaborowski E, Bordoloi S, Rajagopalan N, Sharma BK, Baroi C, Xing W, Zhang L. Characterization of novel polysulfide polymer coated fly ash and its application in mitigating diffusion of contaminants. Environ Pollut 2024; 347:123706. [PMID: 38467367 DOI: 10.1016/j.envpol.2024.123706] [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] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Revised: 02/17/2024] [Accepted: 03/02/2024] [Indexed: 03/13/2024]
Abstract
Fly ash consists of a considerable amount of hazardous elements with high mobility, posing substantial environmental risks during storage in surface impoundments and landfills. This hinders its efficient reuse in construction or material industries. To enhance the versatility of fly ash applications, a novel surface modification technique, termed SuMo, has been developed to create a hydrophobic polysulfide polymer coating on the surface of fly ash particles. The physicochemical properties of SuMo fly ash samples were examined using atomic force microscopy (AFM), environmental scanning electron microscopy (ESEM), thermal gravimetric analysis (TGA), Fourier Transform Infrared spectroscopy (FTIR), and leaching of hazardous elements was tested under practical environmental conditions (pH 4-12) based on the EPA's leaching environmental assessment framework (LEAF). The successful coating of polysulfide polymer on fly ash surface was verified through an increased percentage of C, S, and O in elemental mapping, coupled with the identification of S-O, CO, and C-H functional groups consistent with the chemical structure of polysulfide polymer. While the SuMo fly ash particles maintained their spherical shape, they exhibited increased surface roughness, robust hydrophobicity, and thermal stability up to 250 °C. Notably, owing to the coating's resilience against water leaching, the SuMo fly ash demonstrated a substantial reduction (up to 60-fold) in leachate concentrations of multiple concerning elements, including B, Be, Ba, Mn, Zn, As, Cr, Hg, etc., under various pH conditions compared to the uncoated fly ash. Furthermore, the polysulphide polymer coating effectively prevented Hg volatilization from fly ash below 163 °C. This study highlights the efficacy of the developed polysulfide polymer coating in mitigating the diffusion of hazardous elements from fly ash, thereby enhancing its potential reutilization in material, construction, and agriculture industries.
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Affiliation(s)
- L Zhao
- Prairie Research Institute-Illinois Sustainable Technology Centre, University of Illinois at Urbana Champaign, USA.
| | - E Zaborowski
- Prairie Research Institute-Illinois Sustainable Technology Centre, University of Illinois at Urbana Champaign, USA.
| | - S Bordoloi
- School of Engineering, Aalto University, Finland.
| | - N Rajagopalan
- Prairie Research Institute-Illinois Sustainable Technology Centre, University of Illinois at Urbana Champaign, USA.
| | - B K Sharma
- United States Department of Agriculture, Agricultural Research Service Eastern Regional Research Center, Wyndmoor, PA, USA.
| | - C Baroi
- Prairie Research Institute-Illinois Sustainable Technology Centre, University of Illinois at Urbana Champaign, USA.
| | - W Xing
- Chemistry and Environmental Science, New Jersey Institute of Technology, USA.
| | - L Zhang
- Chemistry and Environmental Science, New Jersey Institute of Technology, USA.
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Zhang J, Shen S, Puggioni D, Wang M, Sha H, Xu X, Lyu Y, Peng H, Xing W, Walters LN, Liu L, Wang Y, Hou D, Xi C, Pi L, Ishizuka H, Kotani Y, Kimata M, Nojiri H, Nakamura T, Liang T, Yi D, Nan T, Zang J, Sheng Z, He Q, Zhou S, Nagaosa N, Nan CW, Tokura Y, Yu R, Rondinelli JM, Yu P. A correlated ferromagnetic polar metal by design. Nat Mater 2024:10.1038/s41563-024-01856-6. [PMID: 38605196 DOI: 10.1038/s41563-024-01856-6] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 03/11/2024] [Indexed: 04/13/2024]
Abstract
Polar metals have recently garnered increasing interest because of their promising functionalities. Here we report the experimental realization of an intrinsic coexisting ferromagnetism, polar distortion and metallicity in quasi-two-dimensional Ca3Co3O8. This material crystallizes with alternating stacking of oxygen tetrahedral CoO4 monolayers and octahedral CoO6 bilayers. The ferromagnetic metallic state is confined within the quasi-two-dimensional CoO6 layers, and the broken inversion symmetry arises simultaneously from the Co displacements. The breaking of both spatial-inversion and time-reversal symmetries, along with their strong coupling, gives rise to an intrinsic magnetochiral anisotropy with exotic magnetic field-free non-reciprocal electrical resistivity. An extraordinarily robust topological Hall effect persists over a broad temperature-magnetic field phase space, arising from dipole-induced Rashba spin-orbit coupling. Our work not only provides a rich platform to explore the coupling between polarity and magnetism in a metallic system, with extensive potential applications, but also defines a novel design strategy to access exotic correlated electronic states.
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Affiliation(s)
- Jianbing Zhang
- State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, China
| | - Shengchun Shen
- State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, China
| | - Danilo Puggioni
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
| | - Meng Wang
- State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, China
| | - Haozhi Sha
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China
- MOE Key Laboratory of Advanced Materials, Tsinghua University, Beijing, China
| | - Xueli Xu
- High Magnetic Field Laboratory, HFIPS, Anhui, Chinese Academy of Sciences, Hefei, China
| | - Yingjie Lyu
- State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, China
| | - Huining Peng
- State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, China
| | - Wandong Xing
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China
- MOE Key Laboratory of Advanced Materials, Tsinghua University, Beijing, China
| | - Lauren N Walters
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
| | - Linhan Liu
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China
- MOE Key Laboratory of Advanced Materials, Tsinghua University, Beijing, China
| | - Yujia Wang
- State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, China
| | - De Hou
- High Magnetic Field Laboratory, HFIPS, Anhui, Chinese Academy of Sciences, Hefei, China
| | - Chuanying Xi
- High Magnetic Field Laboratory, HFIPS, Anhui, Chinese Academy of Sciences, Hefei, China
| | - Li Pi
- High Magnetic Field Laboratory, HFIPS, Anhui, Chinese Academy of Sciences, Hefei, China
| | - Hiroaki Ishizuka
- Department of Physics, Tokyo Institute of Technology, Tokyo, Japan
| | - Yoshinori Kotani
- Center for Synchrotron Radiation Research, Japan Synchrotron Radiation Research Institute, Hyogo, Japan
| | - Motoi Kimata
- Institute of Materials Research, Tohoku University, Sendai, Japan
| | - Hiroyuki Nojiri
- Institute of Materials Research, Tohoku University, Sendai, Japan
| | - Tetsuya Nakamura
- International Center for Synchrotron Radiation Innovation Smart, Tohoku University, Sendai, Japan
| | - Tian Liang
- State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, China
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Japan
- Frontier Science Center for Quantum Information, Beijing, China
| | - Di Yi
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China
| | - Tianxiang Nan
- School of Integrated Circuits, Beijing National Research Center for Information Science and Technology, Tsinghua University, Beijing, China
| | - Jiadong Zang
- Department of Physics and Astronomy, University of New Hampshire, Durham, NH, USA
| | - Zhigao Sheng
- High Magnetic Field Laboratory, HFIPS, Anhui, Chinese Academy of Sciences, Hefei, China
| | - Qing He
- Department of Physics, Durham University, Durham, UK
| | - Shuyun Zhou
- State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, China
- Frontier Science Center for Quantum Information, Beijing, China
| | - Naoto Nagaosa
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Japan
- Department of Applied Physics, University of Tokyo, Tokyo, Japan
| | - Ce-Wen Nan
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China
| | - Yoshinori Tokura
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Japan
- Department of Applied Physics, University of Tokyo, Tokyo, Japan
| | - Rong Yu
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China.
- MOE Key Laboratory of Advanced Materials, Tsinghua University, Beijing, China.
| | - James M Rondinelli
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA.
| | - Pu Yu
- State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, China.
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Japan.
- Frontier Science Center for Quantum Information, Beijing, China.
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Xue S, Tang H, Shen M, Liang X, Li X, Xing W, Yang C, Yu Z. Establishing Multiple-Order Built-In Electric Fields Within Heterojunctions to Achieve Photocarrier Spatial Separation. Adv Mater 2024; 36:e2311937. [PMID: 38191131 DOI: 10.1002/adma.202311937] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 12/21/2023] [Indexed: 01/10/2024]
Abstract
Hybridizing two heterocomponents to construct a built-in electric field (BIEF) at the interface represents a significant strategy for facilitating charge separation in carbon dioxide (CO2)-photoreduction. However, the unidirectional nature of BIEFs formed by various low-dimensional materials poses challenges in adequately segregating the photogenerated carriers produced in bulk. In this study, leveraging zinc oxide (ZnO) nanodisks, a sulfurization reaction is employed to fabricate Z-scheme ZnO/zinc sulfide (ZnS) heterojunctions featuring a multiple-order BIEF. These heterojunctions reveal distinctive interfacial structures characterized by two semicoherent phase boundaries. The cathodoluminescence 2D maps and density functional theory calculation results demonstrate that the direction of the multiple-order BIEF spans from ZnS to ZnO. This directional alignment significantly fosters the spatial separation of photogenerated electrons and holes within ZnS nanoparticles and enhances CO2-to-carbon monoxide photoreduction performance (3811.7 µmol h-1 g-1). The findings present a novel pathway for structurally designing BIEFs within heterojunctions, while providing fresh insights into the migratory behavior of photogenerated carriers across interfaces.
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Affiliation(s)
- Sikang Xue
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
- Fujian Science & Technology Innovation Laboratory for Chemical Engineering of China, College of Chemical Engineering, Fuzhou University, Quanzhou, 362114, P. R. China
| | - Hao Tang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Min Shen
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Xiaocong Liang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Xiaoyan Li
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Wandong Xing
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Can Yang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
| | - Zhiyang Yu
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China
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7
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Pan L, Chen M, Sun J, Jin P, Ding J, Cai P, Chen J, Xing W. Prediction of Fuhrman grade of renal clear cell carcinoma by multimodal MRI radiomics: a retrospective study. Clin Radiol 2024; 79:e273-e281. [PMID: 38065776 DOI: 10.1016/j.crad.2023.11.006] [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] [Received: 07/05/2023] [Revised: 10/16/2023] [Accepted: 11/05/2023] [Indexed: 01/02/2024]
Abstract
AIM To explore the value of multimodal magnetic resonance imaging (MRI) radiomics combined with traditional radiologist-defined semantic characteristics and conventional (cMRI) and functional MRI (fMRI) texture features in predicting Fuhrman grade of clear cell renal cell carcinoma (ccRCC). MATERIALS AND METHODS The data of 89 patients with histopathologically proven ccRCC (low-grade, 54; high-grade, 35) were collected. Texture features were extracted from cMRI (T1- and T2-weighted imaging) and fMRI (Dixon-MRI; blood-oxygen-level dependent [BOLD]-MRI; and susceptibility-weighted imaging [SWI]) images, and the traditional characteristics (TC) were evaluated. Logistic regression analysis was performed to develop models based on TC, cMRI, and fMRI texture features for grading. Receiver operating characteristic (ROC) curve analysis and leave-group-out cross-validation (LGOCV) were performed to test the reliability of combined models. RESULTS Two T2-weighted imaging-based, two Dixon_W-based, one Dixon_F-based, one BOLD-based, and three SWI-based texture features, and three TC were extracted for feature selection. TC, cMRI, fMRI, cMRI+fMRI, cMRI+TC, fMRI+TC, and cMRI+fMRI+TC models were constructed. The AUC of the cMRI+fMRI+TC model for differentiating high- from low-grade ccRCC was 0.74, with 81.42% accuracy, 75.93% sensitivity, and 91.43% specificity. The fMRI+TC model exhibited a performance similar to that of the cMRI+fMRI+TC model (p>0.05). The areas under the curve (AUCs) of the fMRI+TC and cMRI+fMRI+TC models were significantly higher than those of the other five models (all p<0.05). For the cMRI+fMRI+TC model, the mean accuracy was 85.40% after 100 LGOCV for the test sets. CONCLUSION Multimodal MRI radiomics combined with TC, cMRI, and fMRI texture features may be a reliable quantitative approach for differentiating high-grade ccRCC from low-grade ccRCC.
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Affiliation(s)
- L Pan
- Department of Radiology, Third Affiliated Hospital of Soochow University, Changzhou 213003, Jiangsu, China
| | - M Chen
- Department of Radiology, Third Affiliated Hospital of Soochow University, Changzhou 213003, Jiangsu, China
| | - J Sun
- Department of Radiology, Third Affiliated Hospital of Soochow University, Changzhou 213003, Jiangsu, China
| | - P Jin
- Department of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, China
| | - J Ding
- Department of Radiology, Third Affiliated Hospital of Soochow University, Changzhou 213003, Jiangsu, China
| | - P Cai
- Department of Radiology, Third Affiliated Hospital of Soochow University, Changzhou 213003, Jiangsu, China
| | - J Chen
- Department of Radiology, Third Affiliated Hospital of Soochow University, Changzhou 213003, Jiangsu, China.
| | - W Xing
- Department of Radiology, Third Affiliated Hospital of Soochow University, Changzhou 213003, Jiangsu, China.
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8
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Wang Q, Zhang G, Xing W, Pan Z, Zheng D, Wang S, Hou Y, Wang X. Bottom-up Synthesis of Single-Crystalline Poly (Triazine Imide) Nanosheets for Photocatalytic Overall Water Splitting. Angew Chem Int Ed Engl 2023; 62:e202307930. [PMID: 37463869 DOI: 10.1002/anie.202307930] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 07/12/2023] [Accepted: 07/17/2023] [Indexed: 07/20/2023]
Abstract
Poly (triazine imide) (PTI/Li+ Cl- ), one of the crystalline versions of polymeric carbon nitrides, holds great promise for photocatalytic overall water splitting. In principle, the photocatalytic activity of PTI/Li+ Cl- is closely related to the morphology, which could be reasonably tailored by the modulation of the polycondensation process. Herein, we demonstrate that the hexagonal prisms of PTI/Li+ Cl- could be converted to hexagonal nanosheets by adjusting the binary eutectic salts from LiCl/KCl or NaCl/LiCl to ternary LiCl/KCl/NaCl. Results reveal that the extension of in-plane conjugation is preferred, when the polymerisation was performed in the presence of ternary eutectic salts. The hexagonal nanosheets bears longer lifetimes of charge carriers than that of hexagonal prisms due to lower intensity of structure defects and shorter hopping distance of charge carriers along the stacking direction of triazine nanosheets. The optimized hexagonal nanosheets exhibits a record apparent quantum yield value of 25 % (λ=365 nm) for solar hydrogen production by one-step excitation overall water splitting.
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Affiliation(s)
- Qian Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, P. R. China
| | - Guigang Zhang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, P. R. China
| | - Wandong Xing
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, P. R. China
| | - Zhiming Pan
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, P. R. China
| | - Dandan Zheng
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, P. R. China
| | - Sibo Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, P. R. China
| | - Yidong Hou
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, P. R. China
| | - Xinchen Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350108, P. R. China
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9
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Xiao Y, Miao Z, Sun J, Xing W, Wei Y, Bai J, Ye H, Si Y, Cai L. Allisartan Isoproxil Promotes Uric Acid Excretion by Interacting with Intestinal Urate Transporters in Hyperuricemic Zebrafish (Danio rerio). Bull Exp Biol Med 2023; 175:638-643. [PMID: 37853267 DOI: 10.1007/s10517-023-05917-9] [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: 08/12/2022] [Indexed: 10/20/2023]
Abstract
To evaluate the urate-lowering effect and potential drug targets of antihypertensive agent allisartan isoproxil (ALI) and its bioactive metabolite EXP3174, we developed an acute hyperuricemic zebrafish model using potassium oxonate and xanthine sodium salt. Losartan potassium served as the positive control (reference drug). In this model, ALI and losartan potassium exerted a greater urate-lowering effect than EXP3174 indicating that the latter is not the critical substance for elimination of uric acid. The quantitative real-time PCR showed that ALI upregulates the expression of intestinal urate transporters genes ABCG2, PDZK1, and SLC2A9 (p<0.01). Thus, we can suggest that this substance promotes uric acid excretion mainly by interacting with intestinal urate transporters.
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Affiliation(s)
- Y Xiao
- Shenzhen Salubris Pharmaceutical Co., Ltd, Shenzhen, Guangdong, China
| | - Z Miao
- Guangdong Provincial Key Laboratory of Laboratory Animals, Guangdong Laboratory Animals Monitoring Institute, Guangzhou, Guangdong, China
| | - J Sun
- Shenzhen Salubris Pharmaceutical Co., Ltd, Shenzhen, Guangdong, China
| | - W Xing
- Shenzhen Salubris Pharmaceutical Co., Ltd, Shenzhen, Guangdong, China
| | - Y Wei
- Guangdong Provincial Key Laboratory of Laboratory Animals, Guangdong Laboratory Animals Monitoring Institute, Guangzhou, Guangdong, China
| | - J Bai
- Shenzhen Salubris Pharmaceutical Co., Ltd, Shenzhen, Guangdong, China
| | - H Ye
- Guangdong Provincial Key Laboratory of Laboratory Animals, Guangdong Laboratory Animals Monitoring Institute, Guangzhou, Guangdong, China
| | - Y Si
- Guangdong Provincial Key Laboratory of Laboratory Animals, Guangdong Laboratory Animals Monitoring Institute, Guangzhou, Guangdong, China
- College of Life Science and Engineering, Foshan University, Foshan, Guangdong, China
| | - L Cai
- Guangdong Provincial Key Laboratory of Laboratory Animals, Guangdong Laboratory Animals Monitoring Institute, Guangzhou, Guangdong, China.
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10
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Sun Y, Yao Q, Xing W, Jiang H, Li Y, Xiong W, Zhu W, Zheng Y. Residual Strain Evolution Induced by Crystallization Kinetics During Anti-Solvent Spin Coating in Organic-Inorganic Hybrid Perovskite. Adv Sci (Weinh) 2023:e2205986. [PMID: 37096861 DOI: 10.1002/advs.202205986] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/03/2023] [Indexed: 05/03/2023]
Abstract
Organic-inorganic hybrid perovskite (OIHP) polycrystalline thin films are attractive due to their outstanding photoelectronic properties. The anti-solvent spin coating method is the most widely used to synthesize these thin films, and the residual strain is inevitably originates and evolves during the process. However, this residual strain evolution induced by crystallization kinetics is still poorly understood. In this work, the in situ and ex situ synchrotron grazing-incidence wide-angle X-ray scattering (GIWAXS) are utilized to characterize the evolution and distribution of the residual strain in the OIHP polycrystalline thin film during the anti-solvent spin coating process. A mechanical model is established and the mechanism of the crystallization kinetics-induced residual strain evolution process is discussed. This work reveals a comprehensive understanding of the residual strain evolution during the anti-solvent spin coating process in the OIHP polycrystalline thin films and provides important guidelines for the residual strain-related strain engineering, morphology control, and performance enhancement.
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Affiliation(s)
- Y Sun
- Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
- Centre for Physical Mechanics and Biophysics, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
| | - Q Yao
- Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
- Centre for Physical Mechanics and Biophysics, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
| | - W Xing
- Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
- Centre for Physical Mechanics and Biophysics, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
| | - H Jiang
- Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
- Centre for Physical Mechanics and Biophysics, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
| | - Y Li
- Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
- Centre for Physical Mechanics and Biophysics, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
| | - W Xiong
- Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
- Centre for Physical Mechanics and Biophysics, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
| | - W Zhu
- Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
- Centre for Physical Mechanics and Biophysics, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
| | - Y Zheng
- Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
- Centre for Physical Mechanics and Biophysics, School of Physics, Sun Yat-sen University, Guangzhou, 510275, China
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11
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Zhang J, Liang X, Zhang C, Lin L, Xing W, Yu Z, Zhang G, Wang X. Improved Charge Separation in Poly(heptazine‐triazine) Imides with Semi‐coherent Interfaces for Photocatalytic Hydrogen Evolution. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202210849] [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] [Indexed: 11/10/2022]
Affiliation(s)
- Jian Zhang
- Fuzhou University College of Chemistry CHINA
| | | | - Chao Zhang
- Fuzhou University College of Chemistry CHINA
| | - Lihua Lin
- Fuzhou University College of Chemistry CHINA
| | | | - Zhiyang Yu
- Fuzhou University College of Chemistry CHINA
| | | | - Xinchen Wang
- Fuzhou University Chemistry 523 Gongye Rd, Gulou 350000 Fuzhou CHINA
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12
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Zhang J, Liang X, Zhang C, Lin L, Xing W, Yu Z, Zhang G, Wang X. Improved Charge Separation in Poly(heptazine‐triazine) Imides with Semi‐coherent Interfaces for Photocatalytic Hydrogen Evolution. Angew Chem Int Ed Engl 2022; 61:e202210849. [DOI: 10.1002/anie.202210849] [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: 07/23/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Jian Zhang
- Fuzhou University College of Chemistry CHINA
| | | | - Chao Zhang
- Fuzhou University College of Chemistry CHINA
| | - Lihua Lin
- Fuzhou University College of Chemistry CHINA
| | | | - Zhiyang Yu
- Fuzhou University College of Chemistry CHINA
| | | | - Xinchen Wang
- Fuzhou University Chemistry 523 Gongye Rd, Gulou 350000 Fuzhou CHINA
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13
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Han Y, Xing W, Yu R, Meng F. Structure stabilization effect of vacancies and entropy in hexagonal WN. Acta Crystallogr B Struct Sci Cryst Eng Mater 2022; 78:678-684. [PMID: 35975833 DOI: 10.1107/s2052520622006096] [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] [Received: 12/01/2021] [Accepted: 06/08/2022] [Indexed: 06/15/2023]
Abstract
The structural stability of hexagonal tungsten mononitride (WN) has been studied combining scanning transmission electron microscopy and first-principles calculations. The results show that the WC-type WN with vacancies of 6∼8 at% is more stable than the previously proposed MnP-type and NiAs-type structures. Due to the larger vibrational entropy of the WC-type WN, the vacancy concentration required to stabilize the WC-type structure is lower at high temperatures. The results demonstrate the importance of vacancies and configurational and vibrational entropies in the structural stability of compounds synthesized at high temperatures.
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Affiliation(s)
- Yingna Han
- Department of Physics, Beijing Engineering Research Center of Detection and Application for Weak Magnetic Field, University of Science and Technology Beijing, Beijing 100083, People's Republic of China
| | - Wandong Xing
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, People's Republic of China
| | - Rong Yu
- Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China
| | - Fanyan Meng
- Department of Physics, Beijing Engineering Research Center of Detection and Application for Weak Magnetic Field, University of Science and Technology Beijing, Beijing 100083, People's Republic of China
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14
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Zhang H, Dong Q, Li K, Zhang T, Wangsun Y, Xing W. Tetrahydroxystilbene glycoside attenuates endothelial dysfunction and obesity-associated hypertension in obese rats: The role of omentin-1. Atherosclerosis 2022. [DOI: 10.1016/j.atherosclerosis.2022.06.722] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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15
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Pushkarev AS, Pushkareva IV, Kozlova MV, Solovyev MA, Butrim SI, Ge J, Xing W, Fateev VN. Heteroatom-Modified Carbon Materials and Their Use as Supports and Electrocatalysts in Proton Exchange Membrane Fuel Cells (A Review). RUSS J ELECTROCHEM+ 2022. [DOI: 10.1134/s1023193522070114] [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: 11/23/2022]
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16
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Luo Z, Ye X, Zhang S, Xue S, Yang C, Hou Y, Xing W, Yu R, Sun J, Yu Z, Wang X. Unveiling the charge transfer dynamics steered by built-in electric fields in BiOBr photocatalysts. Nat Commun 2022; 13:2230. [PMID: 35468890 PMCID: PMC9038904 DOI: 10.1038/s41467-022-29825-0] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Accepted: 04/01/2022] [Indexed: 11/09/2022] Open
Abstract
Construction of internal electric fields (IEFs) is crucial to realize efficient charge separation for charge-induced redox reactions, such as water splitting and CO2 reduction. However, a quantitative understanding of the charge transfer dynamics modulated by IEFs remains elusive. Here, electron microscopy study unveils that the non-equilibrium photo-excited electrons are collectively steered by two contiguous IEFs within binary (001)/(200) facet junctions of BiOBr platelets, and they exhibit characteristic Gaussian distribution profiles on reduction facets by using metal co-catalysts as probes. An analytical model justifies the Gaussian curve and allows us to measure the diffusion length and drift distance of electrons. The charge separation efficiency, as well as photocatalytic performances, are maximized when the platelet size is about twice the drift distance, either by tailoring particle dimensions or tuning IEF-dependent drift distances. The work offers great flexibility for precisely constructing high-performance particulate photocatalysts by understanding charge transfer dynamics.
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Affiliation(s)
- Zhishan Luo
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China.,College of Chemical Engineering, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Xiaoyuan Ye
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Shijia Zhang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Sikang Xue
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Can Yang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Yidong Hou
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Wandong Xing
- National Center for Electron Microscopy in Beijing, School of Materials Science and Engineering, Key Laboratory of Advanced Materials of Ministry of Education of China, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing, 100084, China
| | - Rong Yu
- National Center for Electron Microscopy in Beijing, School of Materials Science and Engineering, Key Laboratory of Advanced Materials of Ministry of Education of China, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing, 100084, China
| | - Jie Sun
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350100, China and College of Physics and Information Engineering, Fuzhou University, Fuzhou, 350100, China
| | - Zhiyang Yu
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China.
| | - Xinchen Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, China.
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17
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Wu YL, Chen K, Xing W, Chen Q, Liu L, Zhang Q, Ge D, Liu YH, Lin X, Wang L, Huang Y, Zhong WZ. 84P SHR-1316 vs placebo in combination with chemotherapy as perioperative treatment in patients with resectable stage II-III NSCLC: A randomized, double-blind, multicenter, phase Ib/III trial. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.02.094] [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: 11/01/2022] Open
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18
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Shinar S, Xing W, Lewi L, Slaghekke F, Yinon Y, Raio L, Baud D, DeKoninck P, Melamed N, Huszti E, Sun L, Van Mieghem T. Growth patterns of monochorionic twin pregnancy complicated by Type-III selective fetal growth restriction. Ultrasound Obstet Gynecol 2022; 59:371-376. [PMID: 34369619 DOI: 10.1002/uog.23752] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 06/09/2021] [Accepted: 07/26/2021] [Indexed: 06/13/2023]
Abstract
OBJECTIVES Little is known regarding fetal growth patterns in monochorionic twin pregnancy complicated by Type-III selective fetal growth restriction (sFGR). We aimed to assess fetal growth and umbilical artery Doppler pattern in Type-III sFGR across gestation and evaluate the effect of changing Doppler flow pattern on growth and intertwin growth discordance. METHODS This was a retrospective cohort study of all Type-III sFGR pregnancies managed at nine fetal centers over a 12-year time period. Higher-order multiple pregnancy and cases with major fetal anomaly or other monochorionicity-related complications at presentation were excluded. Estimated fetal weight (EFW) was assessed on ultrasound for each twin pair at five timepoints (16-20, 21-24, 25-28, 29-32 and > 32 weeks' gestation) and compared with singleton and uncomplicated monochorionic twin EFW. EFW and intertwin EFW discordance were compared between pregnancies with normalization of umbilical artery Doppler of the smaller twin later in pregnancy and those with persistently abnormal Doppler. RESULTS Overall, 328 pregnancies (656 fetuses) met the study criteria. In Type-III sFGR, the smaller twin had a lower EFW than an average singleton fetus (EFW Z-score ranging from -1.52 at 16 weeks to -2.69 at 36 weeks) and an average monochorionic twin in uncomplicated pregnancy (Z-score ranging from -1.73 at 16 weeks to -1.49 at 36 weeks) throughout the entire gestation, while the larger twin had a higher EFW than an average singleton fetus until 22 weeks' gestation and was similar in EFW to an average uncomplicated monochorionic twin throughout gestation. As pregnancy advanced, growth velocity of both twins decreased, with the larger twin remaining appropriately grown and the smaller twin becoming more growth restricted. Intertwin EFW discordance remained stable throughout gestation. On multivariable longitudinal modeling, normalization of fetal umbilical artery Doppler was associated with better growth of the smaller twin (P = 0.002) but not the larger twin (P = 0.1), without affecting the intertwin growth discordance (P = 0.09). CONCLUSIONS Abnormal fetal growth of the smaller twin in Type-III sFGR was evident early in pregnancy, while EFW of the larger twin remained normal throughout gestation. Normalization of umbilical artery Doppler was associated with improved fetal growth of the smaller twin. © 2021 International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- S Shinar
- Ontario Fetal Centre, Division of Maternal Fetal Medicine, Department of Obstetrics and Gynaecology, Mount Sinai Hospital, University of Toronto, Toronto, ON, Canada
| | - W Xing
- Fetal Medicine Unit and Prenatal Diagnosis Center, Shanghai First Maternity and Infant Hospital of Tongji University, Shanghai, China
| | - L Lewi
- Department of Obstetrics and Gynecology, University Hospitals Leuven, Leuven, Belgium
| | - F Slaghekke
- Department of Gynecology, Leiden University Medical Center, Leiden, The Netherlands
| | - Y Yinon
- Department of Obstetrics and Gynecology, Chaim Sheba Medical Center, Tel Hashomer, Tel Aviv University, Tel Aviv, Israel
| | - L Raio
- Department of Obstetrics and Gynecology, Inselspital, University of Bern, Bern, Switzerland
| | - D Baud
- Department of Woman-Mother-Child, Lausanne University Hospital, Lausanne, Switzerland
| | - P DeKoninck
- Department of Obstetrics and Gynaecology, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - N Melamed
- Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada
| | - E Huszti
- Biostatistics Research Unit, University Health Network, Toronto, ON, Canada
| | - L Sun
- Fetal Medicine Unit and Prenatal Diagnosis Center, Shanghai First Maternity and Infant Hospital of Tongji University, Shanghai, China
| | - T Van Mieghem
- Ontario Fetal Centre, Division of Maternal Fetal Medicine, Department of Obstetrics and Gynaecology, Mount Sinai Hospital, University of Toronto, Toronto, ON, Canada
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19
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Ye X, Wei C, Xue S, Xing W, Liang X, Nie H, Shen M, Du Y, Zhang J, Wang X, Lin W, Yu Z. Atomistic Observation of Temperature-Dependent Defect Evolution within Sub-stoichiometric WO 3-x Catalysts. ACS Appl Mater Interfaces 2022; 14:2194-2201. [PMID: 34958188 DOI: 10.1021/acsami.1c17159] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Tunable crystalline defects endow WO3-x catalysts with extended functionalities for a broad range of photo- and electric-related applications. However, direct visualization of the defect structures and their evolution mechanism is lacking. Herein, aberration-corrected and in situ transmission electron microscopy was complemented by theoretical calculations to investigate the effect of temperature on the defect evolution behavior during hydrogenation treatment. Low processing temperature (100-300 °C) leads to the occurrence of randomly distributed oxygen vacancies within WO3-x nanosheets. At higher temperatures, oxygen vacancies become highly mobile and aggregate into stacking faults. Planar defects are prone to nucleate at the surface and develop in a zigzag form at 400 °C, while treating at 500 °C promotes the growth of {200}-type stacking faults. Our work clearly establishes that the atomic configuration of the defects in WO3-x samples could be manipulated by regulating the hydrogenation temperature. This study not only expands our understanding of the structure-function relationships of sub-stoichiometric tungsten oxides but also unlocks their full potential as advanced catalysts by tuning stoichiometry in a controlled manner.
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Affiliation(s)
- Xiaoyuan Ye
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, People's Republic of China
| | - Changgeng Wei
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, People's Republic of China
| | - Sikang Xue
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, People's Republic of China
| | - Wandong Xing
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, People's Republic of China
| | - Xiaocong Liang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, People's Republic of China
| | - Hongbo Nie
- School of Materials Science and Engineering, Baise University, Baise 533000, P. R. China
| | - Min Shen
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, People's Republic of China
| | - Yong Du
- State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, China
| | - Jinshui Zhang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, People's Republic of China
| | - Xinchen Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, People's Republic of China
| | - Wei Lin
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, People's Republic of China
| | - Zhiyang Yu
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, People's Republic of China
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20
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Abstract
The twinning plane of crystals with a face-centered-cubic (FCC) structure is usually the (111) plane, as found in FCC metals and oxides with FCC sublattices of oxygen, like rock-salt-type NiO and spinel-type Fe3O4. Surprisingly, we found in this work that the twinning plane of rock-salt-type CoO is the (112) plane, although Co is adjacent to Ni in the periodic table. The atomic and electronic structures of the CoO(112) twin boundary with in-plane shift vector 1/2[111] have been studied combining aberration-corrected scanning transmission electron microscopy (STEM), electron-energy-loss spectroscopy (EELS), and density functional theory (DFT) calculations. It was found that the atoms at the twin boundary have nominal oxidation states, and the twin boundary remains insulating and antiferromagnetically coupled. Importantly, through the electronic structures and the crystal orbital Hamilton population (COHP) analyses, the (112) twin boundary is found to be more stable than the (111) twin boundary.
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Affiliation(s)
- Wandong Xing
- National Center for Electron Microscopy in Beijing, School of Materials Science and Engineering, Key Laboratory of Advanced Materials of Ministry of Education of China, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China.
| | - Yang Zhang
- National Center for Electron Microscopy in Beijing, School of Materials Science and Engineering, Key Laboratory of Advanced Materials of Ministry of Education of China, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China.
| | - Jizhe Cui
- National Center for Electron Microscopy in Beijing, School of Materials Science and Engineering, Key Laboratory of Advanced Materials of Ministry of Education of China, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China.
| | - Shiyou Liang
- National Center for Electron Microscopy in Beijing, School of Materials Science and Engineering, Key Laboratory of Advanced Materials of Ministry of Education of China, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China.
| | - Fanyan Meng
- Department of Physics, University of Science and Technology Beijing, Beijing 100083, China.
| | - Jing Zhu
- National Center for Electron Microscopy in Beijing, School of Materials Science and Engineering, Key Laboratory of Advanced Materials of Ministry of Education of China, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China.
| | - Rong Yu
- National Center for Electron Microscopy in Beijing, School of Materials Science and Engineering, Key Laboratory of Advanced Materials of Ministry of Education of China, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China.
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21
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Tang X, Zhao E, Liu C, Xing W, Liu X, Zheng Y, Li H. P09.03 Validation of a Real-World Mortality Endpoint for Advanced Non-Small Cell Lung Cancer Patients in China. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.301] [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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Yang S, Wang X, Liao W, Li L, Tan Z, Zhu L, Hu P, Cui X, Xing W. High-resolution MRI of the vessel wall helps to distinguish moyamoya disease from atherosclerotic moyamoya syndrome. Clin Radiol 2021; 76:392.e11-392.e19. [PMID: 33583567 DOI: 10.1016/j.crad.2020.12.023] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 12/24/2020] [Indexed: 11/25/2022]
Abstract
AIM To evaluate the value of high-resolution magnetic resonance imaging of the vessel wall (VWI) for differentiating moyamoya disease (MMD) from atherosclerotic moyamoya syndrome (AS-MMS). MATERIALS AND METHODS Twenty-one patients with MMD or AS-MMS were assessed retrospectively by two independent raters regarding and magnetic resonance angiography (MRA) stage grading score; collateral development in the lateral fissure and basal ganglia on MRA; and pattern of the thickening of the arterial wall; presence, degree, and pattern of enhancement; presence and distribution of deep tiny flow voids (DTFVs) and collateral development in the lateral fissure and basal ganglia on VWI. After univariate analysis between the two groups, logistic regression models based on imaging findings of MRA or VWI were implemented respectively, and receiver operating characteristic (ROC) curves were generated to compare the discriminatory power of the two imaging methods for diagnosis of MMD. Interrater agreement was analysed using an unweighted Cohen's κ or interclass correlation coefficient (ICC). RESULTS MMD manifested as more concentric thickening, more homogeneous enhancement, higher presence of DTFV, smaller outer-wall boundary area of stenosis or occlusion, and smaller remodelling index on VWI. After Bonferroni-Holm correction for multiple comparisons, for AS-MMS, collaterals in both the lateral fissure and basal ganglia were not usually present on either MRA or VWI. The diagnostic performance of the multivariate logistic regression model based on VWI with an accuracy of 87.1% for classification was higher than MRA. Interrater agreement was moderate or substantial for all the imaging findings. CONCLUSIONS VWI might be a useful and feasible method for differentiating MMD from AS-MMS and a prospective tool for guiding first-line treatment.
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Affiliation(s)
- S Yang
- Department of Radiology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - X Wang
- Department of Radiology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - W Liao
- Department of Radiology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - L Li
- Department of Radiology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Z Tan
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha 410008, China
| | - L Zhu
- Department of Radiology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - P Hu
- Department of Radiology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - X Cui
- Department of Radiology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - W Xing
- Department of Radiology, Xiangya Hospital, Central South University, Changsha 410008, China.
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Shinar S, Xing W, Pruthi V, Jianping C, Slaghekke F, Groene S, Lopriore E, Lewi L, Couck I, Yinon Y, Batsry L, Raio L, Amylidi-Mohr S, Baud D, Kneuss F, Dekoninck P, Moscou J, Barrett J, Melamed N, Ryan G, Sun L, Van Mieghem T. Outcome of monochorionic twin pregnancy complicated by Type-III selective intrauterine growth restriction. Ultrasound Obstet Gynecol 2021; 57:126-133. [PMID: 33073883 DOI: 10.1002/uog.23515] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 09/15/2020] [Accepted: 10/05/2020] [Indexed: 06/11/2023]
Abstract
OBJECTIVE Type-III selective intrauterine growth restriction (sIUGR) is associated with a high and unpredictable risk of fetal death and fetal brain injury. The objective of this study was to describe the prospective risk of fetal death and the risk of adverse neonatal outcome in a cohort of twin pregnancies complicated by Type-III sIUGR and treated according to up-to-date guidelines. METHODS We reviewed retrospectively all monochorionic diamniotic twin pregnancies complicated by Type-III sIUGR managed at nine fetal centers over a 12-year period. Higher-order multiple gestations and pregnancies with major fetal anomalies or other monochorionicity-related complications at initial presentation were excluded. Data on fetal and neonatal outcomes were collected and management strategies reviewed. Composite adverse neonatal outcome was defined as neonatal death, invasive ventilation beyond the resuscitation period, culture-proven sepsis, necrotizing enterocolitis requiring treatment, intraventricular hemorrhage Grade > I, retinopathy of prematurity Stage > II or cystic periventricular leukomalacia. The prospective risk of intrauterine death (IUD) and the risk of neonatal complications according to gestational age were evaluated. RESULTS We collected data on 328 pregnancies (656 fetuses). After exclusion of pregnancies that underwent selective reduction (n = 18 (5.5%)), there were 51/620 (8.2%) non-iatrogenic IUDs in 35/310 (11.3%) pregnancies. Single IUD occurred in 19/328 (5.8%) pregnancies and double IUD in 16/328 (4.9%). The prospective risk of non-iatrogenic IUD per fetus declined from 8.1% (95% CI, 5.95-10.26%) at 16 weeks, to less than 2% (95% CI, 0.59-2.79%) after 28.4 weeks and to less than 1% (95% CI, -0.30 to 1.89%) beyond 32.6 weeks. In otherwise uncomplicated pregnancies with Type-III sIUGR, delivery was generally planned at 32 weeks, at which time the risk of composite adverse neonatal outcome was 29.0% (31/107 neonates). In twin pregnancies that continued to 34 weeks, there was a very low risk of IUD (0.7%) and a low risk of composite adverse neonatal outcome (11%). CONCLUSIONS In this cohort of twin pregnancies complicated by Type-III sIUGR and treated at several tertiary fetal centers, the risk of fetal death was lower than that reported previously. Further efforts should be directed at identifying predictors of fetal death and optimal antenatal surveillance strategies to select a cohort of pregnancies that can continue safely beyond 33 weeks' gestation. © 2020 International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- S Shinar
- Ontario Fetal Centre, Division of Maternal Fetal Medicine, Department of Obstetrics and Gynaecology, Mount Sinai Hospital, University of Toronto, Toronto, ON, Canada
| | - W Xing
- Fetal Medicine Unit &Prenatal Diagnosis Center, Shanghai 1st Maternity and Infant Hospital of Tongji University, Shanghai, China
| | - V Pruthi
- Ontario Fetal Centre, Division of Maternal Fetal Medicine, Department of Obstetrics and Gynaecology, Mount Sinai Hospital, University of Toronto, Toronto, ON, Canada
| | - C Jianping
- Fetal Medicine Unit &Prenatal Diagnosis Center, Shanghai 1st Maternity and Infant Hospital of Tongji University, Shanghai, China
| | - F Slaghekke
- Department of Gynecology, Leiden University Medical Center, Leiden, The Netherlands
| | - S Groene
- Department of Gynecology, Leiden University Medical Center, Leiden, The Netherlands
| | - E Lopriore
- Department of Pediatrics, Leiden University Medical Center, Leiden, The Netherlands
| | - L Lewi
- Department of Obstetrics and Gynecology, University Hospitals Leuven, Leuven, Belgium
| | - I Couck
- Department of Obstetrics and Gynecology, University Hospitals Leuven, Leuven, Belgium
| | - Y Yinon
- Department of Obstetrics and Gynecology, Chaim Sheba Medical Center, Tel Hashomer, Tel Aviv University, Tel Aviv, Israel
| | - L Batsry
- Department of Obstetrics and Gynecology, Chaim Sheba Medical Center, Tel Hashomer, Tel Aviv University, Tel Aviv, Israel
| | - L Raio
- Department of Obstetrics and Gynecology, Inselspital, University of Bern, Bern, Switzerland
| | - S Amylidi-Mohr
- Department of Obstetrics and Gynecology, Inselspital, University of Bern, Bern, Switzerland
| | - D Baud
- Department of Woman-Mother-Child, Lausanne University Hospital, Lausanne, Switzerland
| | - F Kneuss
- Department of Woman-Mother-Child, Lausanne University Hospital, Lausanne, Switzerland
| | - P Dekoninck
- Department of Obstetrics and Gynaecology, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - J Moscou
- Department of Obstetrics and Gynaecology, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - J Barrett
- Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada
| | - N Melamed
- Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada
| | - G Ryan
- Ontario Fetal Centre, Division of Maternal Fetal Medicine, Department of Obstetrics and Gynaecology, Mount Sinai Hospital, University of Toronto, Toronto, ON, Canada
| | - L Sun
- Fetal Medicine Unit &Prenatal Diagnosis Center, Shanghai 1st Maternity and Infant Hospital of Tongji University, Shanghai, China
| | - T Van Mieghem
- Ontario Fetal Centre, Division of Maternal Fetal Medicine, Department of Obstetrics and Gynaecology, Mount Sinai Hospital, University of Toronto, Toronto, ON, Canada
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Pan L, Xing ZY, Xing W, Chen J, Ding JL, Zha TT, Zhang YW. [Value of magnetic resonance imaging texture analysis in evaluating renal allograft injury]. Zhonghua Yi Xue Za Zhi 2020; 100:1768-1772. [PMID: 32536120 DOI: 10.3760/cma.j.cn112137-20200210-00230] [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 explore the value of magnetic resonance imaging (MRI) texture analysis in evaluating renal allograft injury. Methods: A retrospective review was performed on sixty-six patients who underwent allograft renal transplantation (42 males, 24 females; age range, 22-63 years; mean age, (40±10) years) between November 2013 and December 2016. All the patients were divided into three groups according to their eGFR on the day of MRI examination: normal renal allograft function (nRAF) group (n=15), mild to moderate renal allograft injury (mRAI) group (n=18), and severe renal allograft injury (sRAI) group (n=33). All the patients underwent conventional T(2) weighted image (T(2)WI), susceptibility weighted imaging (SWI), and blood-oxygen level dependent (BOLD) MRI examination. MRI texture features of renal allograft were extracted. The texture features based on T(2)WI, SWI, and BOLD with absolute correlation coefficient of eGFR greater than or equal to 0.3 (P<0.05)and also with the highest Z value for Boruta algorithmwere selected. The diagnostic performance of the selected texture features in differentiating the three groups was assessed by receiver operating characteristic (ROC) curve analysis. Results: T(2)WI_Perc.50%, SWI_Perc.01%, BOLD_S(4,4)Contrast, and BOLD_S(5,5)Correlat with absolute correlation coefficient of eGFR greater than or equal to 0.3 (P<0.05) and also with the highest Z value for Boruta algorithm were selected. The AUC for T(2)WI_Perc.50%, SWI_Perc.01%, and BOLD_S(5,5)Correlat in differentiating the nRAF group with the mRAI group was 0.785, 0.720, and 0.700. The AUC for T(2)WI_Perc.50%, SWI_Perc.01%, BOLD_S(4,4)Contrast, and BOLD_S(5,5)Correlat in differentiating the nRAF group with the sRAI group was 0.687, 0.733, 0.784, and 0.737.The AUC for BOLD_S(4,4) Contrast in differentiating the mRAI group with the sRAI group was 0.667. Conclusion: MRI texture analysis can provide valuable information for evaluating renal allograft injury.
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Affiliation(s)
- L Pan
- Department of Radiology, First People's Hospital of Changzhou, Changzhou 213003, China
| | - Z Y Xing
- Department of Urology, First People's Hospital of Changzhou, Changzhou 213003, China
| | - W Xing
- Department of Radiology, First People's Hospital of Changzhou, Changzhou 213003, China
| | - J Chen
- Department of Radiology, First People's Hospital of Changzhou, Changzhou 213003, China
| | - J L Ding
- Department of Radiology, First People's Hospital of Changzhou, Changzhou 213003, China
| | - T T Zha
- Department of Radiology, First People's Hospital of Changzhou, Changzhou 213003, China
| | - Y W Zhang
- Department of Radiology, First People's Hospital of Changzhou, Changzhou 213003, China
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Xing W, Xu WY, Chang L, Zhang K, Wang SR. SP1-induced lncRNA LINC00689 overexpression contributes to osteosarcoma progression via the miR-655/SOX18 axis. Eur Rev Med Pharmacol Sci 2020; 24:2205-2217. [PMID: 32196572 DOI: 10.26355/eurrev_202003_20486] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Many findings have demonstrated long noncoding RNAs (lncRNAs) as crucial regulatory molecules in the progression of osteosarcoma. The aim of this study was to explore the roles and mechanisms of LncRNA LINC00689 (LINC00689) in osteosarcoma. PATIENTS AND METHODS Differential levels of LINC00689 and miR-655 in osteosarcoma samples and cell lines were analyzed by quantitative Real Time-Polymerase Chain Reaction (qRT-PCR). The associations between LINC00689 expression and prognostic significance of osteosarcoma patients were analyzed using a series of statistical assays. Loss-of-function and gain-of-function assays were performed to investigate the role of LINC00689 in proliferation and metastasis in vitro. Bioinformatic assays, Luciferase report assays, and rescue assays were applied to illustrate the ceRNA mechanism network of LINC00689/miR-655/SOX18. RESULTS We found that LINC00689 expression was distinctly upregulated in osteosarcoma specimens and cell lines. MiR-655 displayed a trend of remarkably decreased expression in osteosarcoma tissues. In addition, we showed that LINC00689 could specifically interact with the promoter of SP1 and activate LINC00689 transcription. Further clinical studies indicated that higher levels of LINC00689 were associated with advanced clinical stage, positively distant metastasis, and unfavorable clinical outcome. Functional studies revealed that the knockdown of LINC00689 suppressed the proliferation, migration, and invasion of osteosarcoma cells, and promoted apoptosis. Final mechanistic investigations confirmed that upregulation of LINC00689 competitively bound to miR-655 that prevented SOX18 from miRNA-mediated degradation, thus facilitating osteosarcoma progression. CONCLUSIONS All our findings suggested that SP1-induced upregulation of LINC00689 promoted osteosarcoma progression by regulating miR-655/ SOX18 axis, which provided a novel insight for osteosarcoma tumorigenesis.
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Affiliation(s)
- W Xing
- Department of Orthopedics and Traumatology, Department of Acupuncture and Moxibustion, First Affiliated Hospital, Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang, China.
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26
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Zhang Y, Wang W, Xing W, Cheng S, Deng S, Angst M, Yu CP, Lan F, Cheng Z, Mandrus D, Sales B, Shen J, Zhong X, Tai NH, Yu R, Zhu J. Effect of Oxygen Interstitial Ordering on Multiple Order Parameters in Rare Earth Ferrite. Phys Rev Lett 2019; 123:247601. [PMID: 31922871 DOI: 10.1103/physrevlett.123.247601] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Revised: 09/09/2019] [Indexed: 06/10/2023]
Abstract
Oxygen interstitials and vacancies play a key role in modulating the microstructure and properties of nonstoichiometric oxide systems, such as those used for superconductors and multiferroics. Key to understanding the tuning mechanisms resulting from oxygen doping is a knowledge of the precise positions of these lattice defects, and of the interaction both between these defects and with many order parameters. Here, we report how such information can, for the first time, be obtained from a sample of LuFe_{2}O_{4.22} using a range of techniques including advanced electron microscopy, atomic-resolution spectroscopy, and density functional theory calculations. The results provide quantitative atomic details of the crystal unit cell, together with a description of the ferroelastic, ferroelectric, and ferromagnetic order parameters. We elucidate also the interaction between these order parameters and the positions of the oxygen interstitials in the oxygen-enriched sample. The comprehensive analysis of oxygen interstitial ordering provides insights into understanding the coupling among different degrees of freedom in rare earth ferrites and demonstrates that oxygen content regulation is a powerful tool for tuning the microstructure and properties for this class of quantum material.
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Affiliation(s)
- Yang Zhang
- National Center for Electron Microscopy in Beijing, Key Laboratory of Advanced Materials (MOE), The State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China
| | - Wenbin Wang
- Institute of Nanoelectronic Devices and Quantum Computing, Fudan University, Shanghai 200433, China
| | - Wandong Xing
- National Center for Electron Microscopy in Beijing, Key Laboratory of Advanced Materials (MOE), The State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China
| | - Shaobo Cheng
- National Center for Electron Microscopy in Beijing, Key Laboratory of Advanced Materials (MOE), The State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China
| | - Shiqing Deng
- National Center for Electron Microscopy in Beijing, Key Laboratory of Advanced Materials (MOE), The State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China
| | - Manuel Angst
- Jülich Centre for Neutron Science JCNS and Peter Grünberg Institut PGI, JARA-FIT, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Chu-Ping Yu
- National Center for Electron Microscopy in Beijing, Key Laboratory of Advanced Materials (MOE), The State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China
- Department of Materials Science and Engineering National Tsing-Hua University, Hsinchu 30013, Taiwan
| | - Fanli Lan
- State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China
| | - Zhiying Cheng
- National Center for Electron Microscopy in Beijing, Key Laboratory of Advanced Materials (MOE), The State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China
| | - David Mandrus
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Brian Sales
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Jian Shen
- Institute of Nanoelectronic Devices and Quantum Computing, Fudan University, Shanghai 200433, China
- State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China
| | - Xiaoyan Zhong
- National Center for Electron Microscopy in Beijing, Key Laboratory of Advanced Materials (MOE), The State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China
| | - Nyan-Hwa Tai
- Department of Materials Science and Engineering National Tsing-Hua University, Hsinchu 30013, Taiwan
| | - Rong Yu
- National Center for Electron Microscopy in Beijing, Key Laboratory of Advanced Materials (MOE), The State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China
| | - Jing Zhu
- National Center for Electron Microscopy in Beijing, Key Laboratory of Advanced Materials (MOE), The State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China
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Yang J, Wang C, Xing W. Effects of Microgravity on the Monocyte/Macrophage Physiology and the Potential Implication in Immune Responses to Vaccines. vacres 2019. [DOI: 10.29252/vacres.6.2.47] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
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Lu HT, Xing W, Zhang YW, Qin HP, Wu RH, Ding JL. [The value of DCE-MRI in predicting IDH gene mutation of high-grade gliomas]. Zhonghua Yi Xue Za Zhi 2019; 99:3105-3109. [PMID: 31648456 DOI: 10.3760/cma.j.issn.0376-2491.2019.39.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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 value of quantitative and semiquantitative parameters of DCE-MRI in predicting IDH gene mutation of high-grade gliomas before the operation. Methods: Twenty-six individuals with surgically and pathologically proved WHO Ⅲ-Ⅳ gliomas collected from April 2016 to June 2019 in First People's Hospital of Changzhou, were divided into two groups, IDH mutation group (7 cases, 27-67 years, 3 males and 4 females,) and IDH gene wild group (19 cases, 42-75 years, 12 males and 7 females) according to the results of molecular pathology. All individuals underwent conventional plain (T(1)WI, T(2)WI), enhanced MR scanning (T(1)WI) and dynamic contrast enhancement (DCE). Four quantitative parameters:volume transfer constant (K(trans)), ratio constant of back flux (Kep), extravascular extracellular space fractional volume (Ve), and blood plasma fractional volume (Vp), and four semiquantitative parameters: time to peak (TTP), maximum concentration (MAX Conc), initial area under the gadolinium concentration-time curve (IAUC) and maximum slope of decrease (MAX Slope) were measured. The independent samples t test (normal distribution and homogeneity of variance) or Mann-Whitney rank sum test (abnormal distribution or heterogeneity of variance) were used to compare the differences of quantitative and semiquantitative parameters between IDH gene mutation group and IDH gene wild type group. Receiver operating characteristic (ROC) curve was used to evaluate the efficiency of quantitative and semiquantitative parameters in predicting IDH gene mutation of high-grade gliomas. Results: The value of K(trans),TTP in IDH mutated group were 0.096 (0.080,0.135)/min and (3.95±0.34) s, respectively. The value of K(trans), TTP in IDH wild type group were 0.168 (0.132, 0.337)/min and (2.58±1.15) s, respectively. The value of K(trans) in IDH mutated group was significantly less than the value of K(trans) in IDH gene wild type group (Z value was -2.168, P value was 0.030). The value of K(trans) in IDH mutated group was significantly greater than the value of K(trans) in IDH gene wild type (Z value was -2.630, P value was 0.007). The area under the ROC curve (AUC) of K(trans) and TTP in predicting IDH gene mutation of high-grade gliomas was 0.782 and 0.842, respectively. The specificity of K(trans) was higher (73.7%), The sensitivity of TTP was the higher (100.0%). Combined K(trans)and TTP were the best for predicting IDH gene mutation of high-grade gliomas, AUC was 0.865. Conclusion: Quantitative and semiquantitative parameters of DCE-MRI can help to predict IDH gene mutation of high-grade gliomas before the operation.
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Affiliation(s)
- H T Lu
- Department of Radiology, First People's Hospital of Changzhou, Changzhou 213003, China
| | - W Xing
- Department of Radiology, First People's Hospital of Changzhou, Changzhou 213003, China
| | - Y W Zhang
- Department of Radiology, First People's Hospital of Changzhou, Changzhou 213003, China
| | - H P Qin
- Department of Neurosurgery, First People's Hospital of Changzhou, Changzhou 213003, China
| | - R H Wu
- Department of Neurosurgery, First People's Hospital of Changzhou, Changzhou 213003, China
| | - J L Ding
- Department of Radiology, First People's Hospital of Changzhou, Changzhou 213003, China
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Chen D, Pan J, Chen Y, Xing W, Yan Y, Yuan Y, Zeng W. The mu-opioid receptor is a molecular marker for poor prognosis in hepatocellular carcinoma and represents a potential therapeutic target. Br J Anaesth 2019; 122:e157-e167. [DOI: 10.1016/j.bja.2018.09.030] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 09/07/2018] [Accepted: 09/17/2018] [Indexed: 01/17/2023] Open
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30
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Du YN, Xing W, Yu SN, Ding JL, Chen L, Tian XJ. [Feasibility study of blood oxygen level-dependent magnetic resonance imaging in evaluating the response of metastatic lymph nodes of rabbit VX2 tumor to radiotherapy]. Zhonghua Yi Xue Za Zhi 2019; 99:1028-1033. [PMID: 30955318 DOI: 10.3760/cma.j.issn.0376-2491.2019.13.014] [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 feasibility of blood oxygen level-dependent magnetic resonance imaging (MRI) in evaluating the response of metastatic lymph nodes of rabbit VX2 tumor to radiotherapy. Methods: Twenty-eight healthy New Zealand white rabbits which were provided by the Laboratory Animal Center of Soochow University, male or female, 2 to 3 months, weighing 2 to 3 kg, were used to establish the animal model of VX2 tumor popliteal fossa metastatic lymph node, and then were divided into either the radiotherapy group (n=16) or the control group (n=12). The radiotherapy group received a 20 Gy radiotherapy per rabbit, the control group received sham radiotherapy. All rabbits underwent MRI scan on four time points, including before (0 day), 3rd, 7th and 14th days after radiotherapy. The two parameters of size and R(2*) value (s(-1)) of lymph node were measured. At each time point,two rabbits in each group were sacrificed randomly to resect lymph nodes for pathological examination, and two parameters of microvessel density (MVD, strip/HP) and apoptosis index (AI, %) were analyzed. The parameters among the four time points in each group or between the two groups were compared. The correlation of lymph node size and R(2*) value with MVD or AI was analyzed, respectively. Results: A significant size difference was neither between the two groups or among the each time points in each group (P>0.05). The R(2*) of lymph node in the radiotherapy group was (29.6±1.7),(36.8±2.6),(44.8±5.8) and (57.7±6.2) s(-1) at the time points of 0, 3, 7 and 14 days, respectively, showing a gradual increase trend; MVD was (52.3±2.5),(41.0±3.6),(34.0±3.6) and (22.7±2.5) strip/HP respectively, showing a decreasing trend; AI was 12.8%±0.5%,14.9%±0.6%,20.6%±0.5% and 27.5%±0.7% respectively, showing a gradual increase trend (all P<0.05). In the control group, both R(2*) value and AI among the four time points did not change statistically (all P>0.05), but MVD showed a gradual increase trend,(50.0±3.0),(53.0±1.7),(60.3±2.5) and (70.0±2.0) strip/HP, respectively, P<0.05. There were significant differences in R(2*) and MVD at 3, 7 and 14 days, in AI at 7 and 14 days between the two groups (all P<0.05). There was a linear correlation of R(2*) value, but not of size, with MVD and AI (r=-0.87 and 0.94, respectively). Conclusion: Blood oxygen level-dependent MRI can indirectly reflect the hypoxic status of metastatic lymph nodes after radiotherapy, and has potential value in evaluating the response of metastatic lymph nodes to radiotherapy.
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Affiliation(s)
- Y N Du
- Department of Radiology, Third Affiliated Hospital of Soochow University, Changzhou 213003, China
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Gadd C, Xing W, Nezhad MM, Shah AA. A Surrogate Modelling Approach Based on Nonlinear Dimension Reduction for Uncertainty Quantification in Groundwater Flow Models. Transp Porous Media 2019; 126:39-77. [PMID: 30872876 PMCID: PMC6390720 DOI: 10.1007/s11242-018-1065-7] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 04/13/2018] [Indexed: 11/15/2022]
Abstract
In this paper, we develop a surrogate modelling approach for capturing the output field (e.g. the pressure head) from groundwater flow models involving a stochastic input field (e.g. the hydraulic conductivity). We use a Karhunen–Loève expansion for a log-normally distributed input field and apply manifold learning (local tangent space alignment) to perform Gaussian process Bayesian inference using Hamiltonian Monte Carlo in an abstract feature space, yielding outputs for arbitrary unseen inputs. We also develop a framework for forward uncertainty quantification in such problems, including analytical approximations of the mean of the marginalized distribution (with respect to the inputs). To sample from the distribution, we present Monte Carlo approach. Two examples are presented to demonstrate the accuracy of our approach: a Darcy flow model with contaminant transport in 2-d and a Richards equation model in 3-d.
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Affiliation(s)
- C Gadd
- School of Engineering, University of Warwick, Coventry, CV47AL UK
| | - W Xing
- School of Engineering, University of Warwick, Coventry, CV47AL UK
| | - M Mousavi Nezhad
- School of Engineering, University of Warwick, Coventry, CV47AL UK
| | - A A Shah
- School of Engineering, University of Warwick, Coventry, CV47AL UK
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32
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Xing W, Li Q, Sun Y, Chen B, Ning Y. Application of 18F-FDG PET/CT in preoperative evaluation of axillary lymph node metastasis of breast cancer. Breast 2019. [DOI: 10.1016/s0960-9776(19)30220-6] [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: 10/27/2022] Open
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33
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Xing W, Li Q, Sun Y, Jiang C, Chen B, Ning Y, Tian F. Evaluation of chemotherapy-induced Amenorrhea in women with breast cancer. Breast 2019. [DOI: 10.1016/s0960-9776(19)30123-7] [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: 10/27/2022] Open
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34
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Xing W, Li Q, Sun G, Cao R, Chen B, Jiang C, Ma L, Wang K. Abstract P6-02-14: Not presented. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p6-02-14] [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: 11/16/2022]
Abstract
Abstract
This abstract was not presented at the conference.
Citation Format: Xing W, Li Q, Sun G, Cao R, Chen B, Jiang C, Ma L, Wang K. Not presented [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P6-02-14.
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Affiliation(s)
- W Xing
- China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
| | - Q Li
- China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
| | - G Sun
- China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
| | - R Cao
- China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
| | - B Chen
- China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
| | - C Jiang
- China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
| | - L Ma
- China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
| | - K Wang
- China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
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35
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Xing W, Li Q, Cao R, Sun G, Jiang C. Abstract P2-01-25: Not presented. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p2-01-25] [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: 11/16/2022]
Abstract
Abstract
This abstract was not presented at the conference.
Citation Format: Xing W, Li Q, Cao R, Sun G, Jiang C. Not presented [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P2-01-25.
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Affiliation(s)
- W Xing
- China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
| | - Q Li
- China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
| | - R Cao
- China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
| | - G Sun
- China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
| | - C Jiang
- China-Japan Union Hospital of Jilin University, Changchun, Jilin, China
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36
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Abdelghani E, Xing W, Li Y, Shen D, Alsiddig MA, Li C. Effects of Dietary Supplementation of Soy Isoflavones on the Performance and Egg Quality in Native Chinese Breeder Hens. Braz J Poult Sci 2019. [DOI: 10.1590/1806-9061-2018-0940] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
| | - W Xing
- Nanjing Agricultural University, China
| | - Y Li
- Nanjing Agricultural University, China
| | - D Shen
- Nanjing Agricultural University, China
| | | | - C Li
- Nanjing Agricultural University, China
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Xing W, Zhang Y, Meng F, Wang C, Tao Q, Zhu P, Zhu J, Yu R. Structure stabilization effect of configuration entropy in cubic WN. Phys Chem Chem Phys 2018; 20:29243-29248. [PMID: 30427344 DOI: 10.1039/c8cp05320k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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
The microscopic structure of cubic WN has been studied combining scanning transmission electron microscopy and first-principles calculations. Because of the contribution of configurational entropy, NaCl-type WN with disordered vacancies becomes more stable at high temperatures than NbO-type WN. Moreover, electron beam irradiation can induce an order-disorder transition in cubic WN. It is suggested that the ordered NbO-type WN can be obtained after annealing below the transition temperature. The results shed light on the stability of materials synthesized at high pressures and high temperatures.
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Affiliation(s)
- Wandong Xing
- National Center for Electron Microscopy in Beijing, School of Materials Science and Engineering, Key Laboratory of Advanced Materials of Ministry of Education of China, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China.
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Wei W, Youbo D, Zhou Z, Xing W, Chunli Q, Libin G. Preparation and characterization of protein/viscose fiber and its action in self-heating. J Appl Polym Sci 2018. [DOI: 10.1002/app.47146] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [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)
- W. Wei
- College of Textile Engineering; Taiyuan University of Technology; Taiyuan 030024 Shanxi People's Republic of China
| | - D. Youbo
- College of Textile Engineering; Taiyuan University of Technology; Taiyuan 030024 Shanxi People's Republic of China
| | - Z. Zhou
- College of Textile Engineering; Taiyuan University of Technology; Taiyuan 030024 Shanxi People's Republic of China
| | - W. Xing
- College of Textile Engineering; Taiyuan University of Technology; Taiyuan 030024 Shanxi People's Republic of China
| | - Q. Chunli
- Technical Development Center of Silver Hawk Co., Ltd.; Gaomi 261500 Shandong People's Republic of China
| | - G. Libin
- College of Textile Engineering; Taiyuan University of Technology; Taiyuan 030024 Shanxi People's Republic of China
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39
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Xing W. [Advances and pitfalls of MRI in central nervous system]. Zhonghua Yi Xue Za Zhi 2018; 98:2457-2459. [PMID: 30138994 DOI: 10.3760/cma.j.issn.0376-2491.2018.31.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
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40
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Liang S, Ren H, Guo H, Xing W, Liu C, Ji Y, Jiang H, Zhang P, Du M. Periodontal infection with Porphyromonas gingivalis induces preterm birth and lower birth weight in rats. Mol Oral Microbiol 2018; 33:312-321. [PMID: 29754448 DOI: 10.1111/omi.12227] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/01/2018] [Indexed: 12/29/2022]
Abstract
Preterm birth (PTB), accompanied by low birth weight (LBW) or not, is a syndrome with tremendous risk factors and long-term health consequences for children. In recent decades, overwhelming studies have shown that periodontitis contributes to prematurity and LBW. This study was conducted to determine the link between maternal periodontitis and the pathogenesis of PTB and/or LBW through a rat infection model induced by Porphyromonas gingivalis, an important periodontopathic bacterium. The murine model was established by surgically ligating the left mandibular first molars and inoculating with P. gingivalis, and then all female rats initiated mating 6 weeks post infection. The gestational day and birth weight were recorded, and blood, amniotic fluid, and placental specimens were collected. Rats with a PTB and LBW newborns were observed in the P. gingivalis-infected group. Additionally, P. gingivalis infection significantly increased the maternal serum levels of interferon-γ and interleukin-1β, whereas no significant difference in the cytokine response was observed in the amniotic fluid. Moreover, with the translocation of P. gingivalis to placentas, remarkable changes in gestational tissues were found, followed by significantly enhanced expression of Toll-like receptor 2 (TLR2) as well as Fas and Fas ligand (FasL). These results support the concept that severe cases of periodontitis caused by P. gingivalis infection may be indicative of rats being more susceptible to PTB/LBW, probably through the activation of the TLR2 and Fas/FasL pathways within the placental tissues. This study gave us new insight into how maternal periodontopathogens might be linked to placental damage and premature pathogenesis.
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Affiliation(s)
- S Liang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine, Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - H Ren
- Xiangyang Hospital of Stomatology, Xiangyang, China
| | - H Guo
- The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine, Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - W Xing
- The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine, Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - C Liu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine, Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Y Ji
- The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine, Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - H Jiang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine, Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - P Zhang
- School of Dentistry, University of Alabama at Birmingham, Birmingham, AL, USA
| | - M Du
- The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine, Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
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41
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Zha TT, Xing ZY, Chen J, Xing W, Zhang JG, Tian XJ. [Feasibility of using blood oxygen level-dependent magnetic resonance imaging to evaluate renal fibrosis of ureteral obstruction of rabbits]. Zhonghua Yi Xue Za Zhi 2017; 97:3733-3738. [PMID: 29325329 DOI: 10.3760/cma.j.issn.0376-2491.2017.47.011] [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] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Objective: To investigate the feasibility of blood oxygen level-dependent MR (MR-BOLD) in assessing renal fibrosis of ureteral obstruction of rabbits. Methods: Forty healthy New Zealand rabbits were randomly divided into control group (n=8) and unilateral ureteral obstruction (UUO) group (n=32). The rabbits in the UUO group were subjected to unilateral ureteral obstruction of the left kidney.Coronal T(2) weighted imaging (T(2)WI) and axial BOLD examinations were performed before operation, 2, 4, 6 and 8 W after operation (each subgroup n=8). After the examinations, nephrectomy was performed for histologic evaluation.The T(2)(*) relaxation rate of the renal cortex (CR(2)(*)) , medulla (MR(2)(*)) and the same level of muscle(R(2)(*)(muscle)) were measured separately.The normalization of the cortex and medulla (sR(2)(*)), and the difference of sR(2)(*) between renal cortex and medulla before and post UUO (ΔsR(2)(*)) were calculated.The differences of sR(2)(*) (sCR(2)(*), sMR(2)(*), sCR(2)(*)(control), sMR(2)(*)(control)) at each time point between control and UUO group were compared by using independent sample t test.The LSD test was used to compare the sR(2)(*) in the control with that in the UUO group.The ΔsCR(2)(*) and ΔsMR(2)(*) values of the subgroups at UUO 2, 4, 6 and 8 W were compared by independent sample t test. Results: The sR(2)(*) values of UUO group were all lower than those of control group (all P<0.05), while sR(2)(*)(control) and sR(2)(*) in UUO group before operation were not significant different (P>0.05). The sCR(2)(*) values of UUO 2, 4, 6 and 8 W were 0.32±0.01, 0.37±0.01, 0.47±0.02 and 0.50±0.03.The sMR(2)(*) values were 0.39±0.02, 0.48±0.02, 0.58±0.04 and 0.65±0.05.There were significant differences of sCR(2)(*)(between) UUO 2 W and 6 W, UUO 2 W and 8 W, UUO 4 W and 6 W, UUO 4 W and 8 W (all P<0.01). There were significant differences of sMR(2)(*)(between) UUO 2 W and 6 W, UUO 2 W and 8 W, UUO 4 W and 8 W (all P<0.01). No significant difference was founded between sCR(2)(*) and sMR(2)(*) at each time point in control group (P>0.05). The ΔsCR(2)(*) values of UUO 2, 4, 6 and 8 W were 0.31±0.02, 0.20±0.02, 0.14±0.20, 0.09±0.04; the ΔsMR(2)(*) values were 0.51±0.05, 0.36±0.04, 0.28±0.05, 0.19±0.05. The ΔsCR(2)(*) values of UUO 2, 4 and 6 W were less than ΔsMR(2)(*) (P<0.05). There was no significant difference between ΔsCR(2)(*) and ΔsMR(2)(*) in UUO 8 W (P>0.05). Conclusions: The R(2)(*) change in medulla resulted from renal fibrosis is more significant than cortex.MR-BOLD can reflect the process of renal fibrosis.It's feasible and of great value to use renal MR-BOLD for the assessment of renal fibrosis induced by unilateral ureteral obstruction.
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Affiliation(s)
- T T Zha
- Department of Medical Imaging, First People's Hospital of Changzhou, Changzhou 213003, China
| | - Z Y Xing
- Department of Urology, First People's Hospital of Changzhou, Changzhou 213003, China
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Zhang JG, Xing ZY, Zha TT, Tian XJ, Xing SJ, Pan X, Xu L, Pan L, Xing W, Chen J. [Feasibility of susceptibility weighted imaging in the evaluation of renal fibrosis induced by unilateral ureteral obstruction in white rabbits]. Zhonghua Yi Xue Za Zhi 2017; 97:3573-3578. [PMID: 29275598 DOI: 10.3760/cma.j.issn.0376-2491.2017.45.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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 evaluate the feasibility of susceptibility weighted imaging (SWI) to reflect the progression of renal fibrosis (RF) induced by unilateral ureteral obstruction (UUO) in rabbits. Methods: Total of 32 New Zealand white rabbits (aged 4-5 months) were used to establish the UUO model (RF group) and were divided into 4 subgroups (including RF-2W group, RF-4W group , RF-6W group and RF-8W group) according to the duration of obstruction(2, 4, 6 and 8 weeks). Another 8 rabbits, underwent sham operation, were used as the control group (Sham group). T2 weighted imaging (T(2)WI) and SWI sequences were performed on the rabbits at 2, 4, 6 and 8 weeks after UUO, respectively. Rabbits were sacrificed and specimens were obtained after MR examination, then hematoxylin&eosin staining and Masson staining were performed to explore the renal tubular injury and interstitial fibrosis. The relationship between the relative signal-to-noise ratio(rSNR)measured on the SWI fusion maps and the degree of renal fibrosis was analyzed. Analysis of variance was used to compare the difference of rSNRs among 5 groups. Results: The rSNRs of the inner medulla gradually decreased over time, the rSNRs of Sham group, RF-2W group, RF-4W group, RF-6W group and RF-8W group was 2.29±0.18, 1.73±0.30, 1.67±0.08, 1.42±0.28, 1.12±0.15, respectively (F=25.876, P<0.01). In RF-2W group, the rSNRs of the outer medulla and cortex increased when compared with those in the Sham group, then they decreased gradually over time in the other groups (F=5.230, 7.621, both P<0.05). The pathological results demonstrated that the morphology of renal tubules in Sham group was normal and no apoptosis or necrosis was seen in the tubular epithelial cells. In the RF-2W group, the main pathological manifestations included renal tubules dilatation, tubular epithelial cell degeneration or necrosis and the infiltration of inflammatory cell. In Masson staining, lots of blue areas were present in the interstitial. As the obstruction time prolonged, the renal tubular collapse, inflammatory cells and fibroblasts increased significantly. Meanwhile blue area also increased significantly in Masson staining. Conclusion: SWI can be used as a noninvasive method to evaluate the pathological progression of fibrosis in the rabbit UUO model.
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Affiliation(s)
- J G Zhang
- Department of Radiology, the Third Affiliated Hospital of Suzhou University, Changzhou 213003, China
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Chen Y, Hao D, Wu X, Xing W, Yang Y, He C, Wang W, Liu J, Wang J. Neoadjuvant versus adjuvant chemoradiation for stage II-III esophageal squamous cell carcinoma: a single institution experience. Dis Esophagus 2017; 30:1-7. [PMID: 28475725 DOI: 10.1093/dote/dox016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Esophageal cancer is the eighth most common cancer worldwide. It is the fourth most common cause of cancer death in China and esophageal squamous cell carcinoma (ESCC) is the most prevalent histologic type. Many clinical trials have explored the value of neoadjuvant or adjuvant chemoradiation therapy in potentially resectable ESCC; however, these studies have produced conflicting results. This retrospective study was performed to investigate whether patients with resectable stage II/III ESCC should receive neoadjuvant or adjuvant therapy in addition to surgery. A review of stage II/III thoracic ESCC patients who underwent esophagectomy and either neoadjuvant or adjuvant chemoradiation was performed. Chemotherapy regimen consisted of cisplatin 75 mg/m2 divided into 3 days and fluorouracil 500 mg/m2 on days 1 to 5. The patients who underwent neoadjuvant therapy were treated with one cycle of chemotherapy concurrently with radiotherapy (40 Gy in 20 fractions, 5 days/week), and those receiving adjuvant therapy were treated with two cycles of chemotherapy concurrently with radiotherapy (46-50 Gy in 23-25 fractions, 5 days/week). A total of 122 patients met inclusion criteria, of which 49 underwent neoadjuvant chemoradiation and 73 underwent adjuvant chemoradiation. Median follow up was 36.5 months. The median survival times and 3, 5-year overall survival (OS) rates for the neoadjuvant and adjuvant groups were 39.3 versus 31.5 months, and 53.0%, 45.7% versus 42.9%, 29.7%, respectively (P = 0.091). For the patients with stage III ESCC, the median survival times and 5-year OS rates for the neoadjuvant and adjuvant groups were 39.3 versus 21.3 months, and 43.4% versus 21.0%, respectively (P = 0.021). Among lymph node-positive patients, the median survival times and 5-year OS rates for the neoadjuvant and adjuvant groups were 55.6 versus 23.7 months, and 43.0% versus 25.7%, respectively (P = 0.085). The incidence of perioperative and postoperative complications was comparable between the two groups (P > 0.05). For patients with resectable stage II/III ESCC, neoadjuvant chemoradiation does not increase postoperative complications and is associated with a trend toward better OS when compared to adjuvant chemoradiation.
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Affiliation(s)
- Y Chen
- Department of Clinical Oncology, Renmin Hospital of Wuhan University, Wuhan, China.,Department of Radiation Oncology
| | - D Hao
- Department of Radiation Oncology
| | - X Wu
- Department of Radiation Oncology
| | - W Xing
- Department of Thoracic Surgery, Zhengzhou University Affiliated Cancer Hospital, Henan Cancer Hospital, Zhengzhou, China
| | - Y Yang
- Department of Radiation Oncology
| | - C He
- Department of Radiation Oncology
| | - W Wang
- Department of Radiation Oncology
| | - J Liu
- Department of Radiation Oncology
| | - J Wang
- Department of Radiation Oncology
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Li Y, Ti HJ, Xing W, Liu YL, Fu MF. [Gastric neuroendocrine tumor with G2 and G3 components: report of a case]. Zhonghua Bing Li Xue Za Zhi 2016; 45:797-798. [PMID: 27821238 DOI: 10.3760/cma.j.issn.0529-5807.2016.11.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
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Sun J, Xing ZY, Yu SN, Chen J, Zha TT, Fan M, Ma JH, Xing W. [Correlation between susceptibility weighted imaging manifestation and serum cystatin C for delayed graft function]. Zhonghua Yi Xue Za Zhi 2016; 96:1682-6. [PMID: 27290710 DOI: 10.3760/cma.j.issn.0376-2491.2016.21.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To explore the correlation between susceptibility weighted imaging (SWI) manifestation and serum cystatin C level for delayed graft function (DGF). METHODS The conventional MRI, SWI and serum cystatin C of 27 cases with DGF in nephrotransplantation center in Third Affiliated Hospital of Suzhou University from September 2014 and August 2015 were retrospectively analyzed.By contrasting conventional MRI images of transplanted kidney in DGF, the imaging manifestations of benign tumors such as cysts and angiomyolipomas were excluded on SWI images, and then making the renal cortex as the reference, if the abnormal signal lesions were found in the transplanted kidney, the location and signal intensity would be analyzed. The differences in serum cystatin C level between DGF groups without and with abnormal signal lesions were compared by using independent-sample t-test.The correlation between SWI manifestation and serum cystatin C level for DGF was assessed with Spearman rank correlation analysis. RESULTS A total of 15 cases were found without abnormal signal lesions and the average value of their serum cystatin C level was (2.92±0.44) mg/L.A total of 12 cases were found with abnormal low signal lesions located at junctional zone between cortex and medulla, and the average value of their serum cystatin C level was (6.91±0.96) mg/L. The differences in serum cystatin C level between the two DGF groups were statistically significant (t=-4.040, P=0.000). There was a positive correlation between the abnormal low signal lesions on SWI and serum cystatin C level (r=0.660, P=0.000). CONCLUSION The status of renal function impairment could be reflected by being with or without abnormal signal lesions on SWI. A relatively big renal function impairment may be predicted by the appearance of abnormal low signal lesions at junctional zone between cortex and medulla on SWI.
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Affiliation(s)
- J Sun
- Department of Radiology, the Third Affiliated Hospital of Suzhou University, Changzhou 213001, China
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Hong L, Liang L, Bhattacharyya S, Xing W, Chen LQ. Anisotropic Li intercalation in a Li(x)FePO4 nano-particle: a spectral smoothed boundary phase-field model. Phys Chem Chem Phys 2016; 18:9537-43. [PMID: 26984175 DOI: 10.1039/c6cp00267f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A spectral smoothed boundary phase-field model is implemented to study lithium (Li) intercalation in a LixFePO4 nano-particle immersed in a Li(+) rich electrolyte. It takes into account different physical processes on the particle surface, such as heterogeneous nucleation, Li flux and stress-free boundary conditions. We show the nucleation and growth of plate-like Li-rich crystallites along the (010) plane due to the high Li mobility along [001]. Since such plate-like crystallites, which are nucleated from (001) surfaces, align their phase boundaries along the (101) habit planes, a LixFePO4 nano-particle with prominent (010) and (001) surface facets and the longest axis length along [100] is proposed to exhibit great mechanical stability.
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Affiliation(s)
- L Hong
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - L Liang
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - S Bhattacharyya
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - W Xing
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - L Q Chen
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA
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Quartilho A, Zekite A, Xing W, Loutfi M, Bunce C, Wormald R. Certification figures and their accuracy. Eye (Lond) 2015; 29:1516. [PMID: 26228289 DOI: 10.1038/eye.2015.143] [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] [Indexed: 11/09/2022] Open
Affiliation(s)
- A Quartilho
- Department of Research & Development, NIHR BRC for Ophthalmology at Moorfields Eye Hospital and UCL Institute of Ophthalmology, London, UK
| | - A Zekite
- Department of Research & Development, NIHR BRC for Ophthalmology at Moorfields Eye Hospital and UCL Institute of Ophthalmology, London, UK
| | - W Xing
- Department of Research & Development, NIHR BRC for Ophthalmology at Moorfields Eye Hospital and UCL Institute of Ophthalmology, London, UK
| | - M Loutfi
- School of Medicine, University of Liverpool, Liverpool, UK
| | - C Bunce
- Department of Research & Development, NIHR BRC for Ophthalmology at Moorfields Eye Hospital and UCL Institute of Ophthalmology, London, UK.,London School of Hygiene & Tropical Medicine, London, UK
| | - R Wormald
- Department of Research & Development, NIHR BRC for Ophthalmology at Moorfields Eye Hospital and UCL Institute of Ophthalmology, London, UK.,London School of Hygiene & Tropical Medicine, London, UK
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Barsam A, Petrushkin H, Brennan N, Bunce C, Xing W, Foot B, Tuft S. Acute corneal hydrops in keratoconus: a national prospective study of incidence and management. Eye (Lond) 2015; 29:469-74. [PMID: 25592120 DOI: 10.1038/eye.2014.333] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2014] [Accepted: 11/20/2014] [Indexed: 11/09/2022] Open
Abstract
PurposeTo determine incidence and management of acute corneal hydrops in the UK.MethodsWe used the BOSU report card system to survey cases of acute corneal hydrops in patients with keratoconus that occurred in the UK between November 2009 and December 2010. Ophthalmologists who reported a case were sent an initial questionnaire, with a follow-up questionnaire after 6 months. We collected information on the demographics, complications, changes in visual acuity, and management. The 2011 National Census was used as a source for population and ethnicity in the UK.ResultsThere were 73 incident cases of acute corneal hydrops, with a response to the initial questionnaire for 64 (88%) patients and follow-up data at 6 months for 57 (78%) patients. For the 64 confirmed cases the median (interquartile range) age of onset was 31.9 (23.2, 41.3) years and 48 (75%) of the cases occurred in males. A total of 42 (66%) patients were white, 14 (22%) were South Asian, and 7 (11%) were black. The proportion of South Asian and black patients with acute corneal hydrops was significantly higher than in the general population (P<0.001). The minimum estimated annual incidence of acute corneal hydrops in patients with keratoconus was estimated to be 1.43 (1.10, 1.83) per 1000. At 6 months following acute corneal hydrops a decision to proceed with keratoplasty had been made for 12 (20.3%) patients.ConclusionsThis is the first population-based estimate of the incidence of acute corneal hydrops in keratoconus.
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Affiliation(s)
- A Barsam
- Department of Ophthalmology, Luton and Dunstable University Hospital, Luton, UK
| | - H Petrushkin
- Corneal Service, Moorfields Eye Hospital NHS Foundation Trust, London, UK
| | - N Brennan
- Department of Ophthalmology, Hillingdon Hospital, London, UK
| | - C Bunce
- Corneal Service, Moorfields Eye Hospital NHS Foundation Trust, London, UK
| | - W Xing
- Corneal Service, Moorfields Eye Hospital NHS Foundation Trust, London, UK
| | - B Foot
- British Ophthalmic Surveillance Unit, The Royal College of Ophthalmologists, London, UK
| | - S Tuft
- Corneal Service, Moorfields Eye Hospital NHS Foundation Trust, London, UK
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Zhou W, Wang Z, Xing W, Liu G. Plasticity in latitudinal patterns of leaf N and P of Oryza rufipogon in China. Plant Biol (Stuttg) 2014; 16:917-923. [PMID: 24450441 DOI: 10.1111/plb.12147] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Accepted: 11/15/2013] [Indexed: 06/03/2023]
Abstract
Characterising the adaptability in nature of plant stoichiometric patterns across geographic or environmental gradients is important in advancing our understanding of the organisation of plant-nutrient relationships. We examined correlations between plant nutrient traits, latitude, longitude, climate and soil variables in 34 populations of Oryza rufipogon across its range. We further compared the responses of population transplants at two experimental gardens: one beyond its northern natural range and another near the southern limit, to assess the nature of geographic variation in plant nutrients. The study showed that leaf P of O. rufipogon in the field was negatively correlated with latitude and largely depended on temperature and soil P availability. Leaf N was not related to latitude but was significantly correlated with precipitation and soil N concentration. Leaf N:P ratio was largely determined by absorption efficiency of P. Transplantation revealed that there were no significant associations of leaf nutrients with geographic, climatic or soil variables of origin in either of the experimental gardens, indicating phenotypic plasticity. However, examination of relationships between response ratios of leaf nutrients and change ratio of climate and soil environments, as well as norms of reaction in the transplantation experiment, revealed more complexity, suggesting both substantial genotypic diversity and the existence of genotype × environment interactions in these populations of O. rufipogon. These data indicate that adaptive plasticity response of plants to temperature and soil P availability significantly explain the observed shifts in leaf N, P and N:P of O. rufipogon along latitudinal gradients.
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Affiliation(s)
- W Zhou
- Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, China; College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
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Ravnsbæk DB, Xiang K, Xing W, Borkiewicz OJ, Wiaderek KM, Gionet P, Chapman KW, Chupas PJ, Chiang YM. Extended solid solutions and coherent transformations in nanoscale olivine cathodes. Nano Lett 2014; 14:1484-1491. [PMID: 24548146 DOI: 10.1021/nl404679t] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Nanoparticle LiFePO4, the basis for an entire class of high power Li-ion batteries, has recently been shown to exist in binary lithiated/delithiated states at intermediate states of charge. The Mn-bearing version, LiMn(y)Fe(1-y)PO4, exhibits even higher rate capability as a lithium battery cathode than LiFePO4 of comparable particle size. To gain insight into the cause(s) of this desirable performance, the electrochemically driven phase transformation during battery charge and discharge of nanoscale LiMn0.4Fe0.6PO4 of three different average particle sizes, 52, 106, and 152 nm, is investigated by operando synchrotron radiation powder X-ray diffraction. In stark contrast to the binary lithiation states of pure LiFePO4 revealed in recent investigations, the formations of metastable solid solutions covering a remarkable wide compositional range, including while in two-phase coexistence, are observed. Detailed analysis correlates this behavior with small elastic misfits between phases compared to either pure LiFePO4 or LiMnPO4. On the basis of time- and state-of-charge dependence of the olivine structure parameters, we propose a coherent transformation mechanism. These findings illustrate a second, completely different phase transformation mode for pure well-ordered nanoscale olivines compared to the well-studied case of LiFePO4.
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Affiliation(s)
- D B Ravnsbæk
- Department of Material Science and Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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