1
|
Zhang DM, Zhai CJ, Feng XD, Wang CZ, Qiu JF, Wei JG. [Diagnostic value of combined application of GATA3, SOX10 and p16 in triple negative breast carcinomas]. Zhonghua Yi Xue Za Zhi 2022; 102:735-740. [PMID: 35280018 DOI: 10.3760/cma.j.cn112137-20210621-01395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Objective: To investigate the expression of GATA3, SOX10, and p16 in triple-negative breast cancer (TNBC) and analyze their significance and correlation with clinicopathology. Methods: The expressions of GATA3, SOX10 and p16 in 53 cases of TNBC and 50 cases of non-TNBC were detected by immunohistochemical staining. Results: GATA3 and SOX10 were positive in 58.5%(31/53) and 75.5%(40/53) of TNBC, respectively. The expression of SOX10 was significantly higher than that in non-TNBC (P<0.05). SOX10 was positive in 17 of the 22 cases that lacked GATA3 expression (77.3%). The expression of p16 was significantly higher in the TNBC, and the co-expression with SOX10 was significantly increased (P<0.05). The sensitivity, specificity, and AUC under the ROC curve of SOX10 were higher than those of GATA3. The sensitivity of SOX10 was higher than that of p16, but the specificity was lower than that of p16. The AUC of SOX10 was higher than that of p16. AUC of combined detection of GATA3 and SOX10, SOX10 and p16 were higher than that of each antibody alone (P<0.05). The expression of GATA3, SOX10, and p16 had no significant correlation with age, tumor size, and lymph node metastasis. The expression of SOX10 and p16 in grade 3 and basal-like TNBC increased significantly, and their co-expression increased. Conclusions: The expressions of SOX10 and p16 in TNBC are significantly increased. SOX10 is a reliable marker for the diagnosis of TNBC and a supplement to GATA3. Whether p16 is a marker related to the prognosis of TNBC remains to be further studied.
Collapse
Affiliation(s)
- D M Zhang
- Department of Pathology, Fu Xing Hospital, Capital Medical University, Beijing 100038, China
| | - C J Zhai
- Department of Pathology, Fu Xing Hospital, Capital Medical University, Beijing 100038, China
| | - X D Feng
- Department of Pathology, Fu Xing Hospital, Capital Medical University, Beijing 100038, China
| | - C Z Wang
- Department of Pathology, Fu Xing Hospital, Capital Medical University, Beijing 100038, China
| | - J F Qiu
- Department of Pathology, Shaoxing People's Hospital, Zhejiang 312000, China
| | - J G Wei
- Department of Pathology, Shaoxing People's Hospital, Zhejiang 312000, China
| |
Collapse
|
2
|
Liu P, Zhang B, Zeng Q, Chen SW, Ge C, Wang WH, Wang CZ, Yue W, Wan J. [Induction of peripheral blood mononuclear cells to hepatocyte-like cells and preliminary study of cell response to injury under the effect of acetaminophen]. Zhonghua Gan Zang Bing Za Zhi 2022; 30:87-93. [PMID: 35152675 DOI: 10.3760/cma.j.cn501113-20211118-00558] [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: 06/14/2023]
Abstract
Objective: To establish a method for the induction of peripheral blood mononuclear cells to hepatocyte-like cells, and preliminarily investigate cell response to injury under the effect of acetaminophen (APAP). Methods: The surface marker CD45 of peripheral blood mononuclear cells wase detected cells by using flow cytometry and immunofluorescence methods. The cellular morphology of induced hepatocyte-like cells was observed under an inverted microscope. Real-time fluorescent quantitative PCR (RT-PCR) was used to detect the expression level of hepatocyte-specific genes, such as cytochrome (CY) P1A2, CYP3A4, CYP2C9, albumin (ALB), alpha-fetoprotein (AFP), and hepatocyte nuclear factor (HNF)4α mRNA. Immunofluorescence method was used to detect intracellular hepatocyte markers AFP, HNF4α, and ALB expression at the protein level. Biochemical analyzer was used to detect hepatocyte-specific secretory functions of AFP, ALB, and urea. Luciferase chemiluminescence method was used to detect the activity of key drug metabolizing enzyme CYP3A4. Colorimetric assay was used to detect the effect of the drug acetaminophen on hepatocyte-like cells, and alanine aminotransferase (ALT) was used as an indicator of liver cell injury. The statistical differences between the data were compared with t-test and rank-sum test. Results: The positive expression rate of CD45 cell surface markers isolated from peripheral blood mononuclear cells was about 98%, and hepatocyte-like cell morphology changes appeared on 15th day of induction. Compared with isolated mononuclear cells, CYP1A2, CYP3A4, CYP2C9, ALB, AFP and HNF4α mRNA was markedly elevated. The expression level of AFP, ALB and HNF4α protein were equally increased, and the secretory function of AFP, ALB and urea were enhanced. Compared with primary hepatocytes, CYP1A2, CYP2C9, AFP, HNF4α mRNA, and CYP3A4 mRNA did not decrease. The expression levels of AFP, ALB, and HNF4α proteins in the cells did not decrease, and the secretory function of AFP, ALB, and urea did not decrease. In addition, the CYP3A4 enzyme activity produced by hepatocyte-like cells was similar to that of primary hepatocytes. Compared with hepatocyte-like cells incubated without APAP, hepatocyte-like cells incubated with APAP had higher ALT level. Under the effect of APAP, the ALT level of hepatocyte-like cells was higher than isolated mononuclear cells. Conclusion: Peripheral blood mononuclear cells can be induced into hepatocyte-like cells with partial characteristics of hepatocytes, including the activity of CYP3A4, a key enzyme of hepatocyte drug metabolism. Additionally, preliminarily ALT secretory features reflect the hepatocytes injury under the effect of acetaminophen.
Collapse
Affiliation(s)
- P Liu
- Chinese LPA Medical School, Beijing 100853, China Department of Gastroenterology, the Second Medical Centre, Chinese PLA General Hospital, National Clinical Research Center for Geriatic Diseases, Beijing 100853, China
| | - B Zhang
- Stem Cell and Regenerative Medicine Lab, Institute of Health Service and Transfusion Medicine, Beijing 100850, China
| | - Q Zeng
- Stem Cell and Regenerative Medicine Lab, Institute of Health Service and Transfusion Medicine, Beijing 100850, China
| | - S W Chen
- Department of Gastroenterology, the Second Medical Centre, Chinese PLA General Hospital, National Clinical Research Center for Geriatic Diseases, Beijing 100853, China
| | - C Ge
- Beijing University of Technoloby, Beijing 100124, China
| | - W H Wang
- Department of Gastroenterology, the Second Medical Centre, Chinese PLA General Hospital, National Clinical Research Center for Geriatic Diseases, Beijing 100853, China
| | - C Z Wang
- Department of Gastroenterology, the Second Medical Centre, Chinese PLA General Hospital, National Clinical Research Center for Geriatic Diseases, Beijing 100853, China
| | - W Yue
- Stem Cell and Regenerative Medicine Lab, Institute of Health Service and Transfusion Medicine, Beijing 100850, China
| | - J Wan
- Department of Gastroenterology, the Second Medical Centre, Chinese PLA General Hospital, National Clinical Research Center for Geriatic Diseases, Beijing 100853, China
| |
Collapse
|
3
|
Tang L, Ho KM, Wang CZ. Molecular dynamics simulation of metallic Al-Ce liquids using a neural network machine learning interatomic potential. J Chem Phys 2021; 155:194503. [PMID: 34800941 DOI: 10.1063/5.0066061] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Al-rich Al-Ce alloys have the possibility of replacing heavier steel and cast irons for use in high-temperature applications. Knowledge about the structures and properties of Al-Ce alloys at the liquid state is vital for optimizing the manufacture process to produce desired alloys. However, reliable molecular dynamics simulation of Al-Ce alloy systems remains a great challenge due to the lack of accurate Al-Ce interatomic potential. Here, an artificial neural network (ANN) deep machine learning (ML) method is used to develop a reliable interatomic potential for Al-Ce alloys. Ab initio molecular dynamics simulation data on the Al-Ce liquid with a small unit cell (∼200 atoms) and on the known Al-Ce crystalline compounds are collected to train the interatomic potential using ANN-ML. The obtained ANN-ML model reproduces well the energies, forces, and atomic structure of the Al90Ce10 liquid and crystalline phases of Al-Ce compounds in comparison with the ab initio results. The developed ANN-ML potential is applied in molecular dynamics simulations to study the structures and properties of the metallic Al90Ce10 liquid, which would provide useful insight into the guiding experimental process to produce desired Al-Ce alloys.
Collapse
Affiliation(s)
- L Tang
- Department of Applied Physics, College of Science, Zhejiang University of Technology, Hangzhou 310023, China
| | - K M Ho
- Ames Laboratory-USDOE, Iowa State University, Ames, Iowa 50011, USA
| | - C Z Wang
- Ames Laboratory-USDOE, Iowa State University, Ames, Iowa 50011, USA
| |
Collapse
|
4
|
Abstract
Amorphous diamond structures are generated by quenching high-density high-temperature liquid carbon using tight-binding molecular-dynamics simulations. We show that the generated amorphous diamond structures are predominated by strong tetrahedral bonds with the sp3 bonding fraction as high as 97%, thus exhibit an ultra-high incompressibility and a wide band gap close to those of crystalline diamond. A small amount of sp2 bonding defects in the amorphous sample contributes to localized electronic states in the band gap while large local strain gives rise to localization of vibrational modes at both high and low frequency regimes.
Collapse
Affiliation(s)
- Rong Cheng
- College of Physics, Qingdao University, Qingdao, Shandong 266071, China and Ames Laboratory-U.S. DOE and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA.
| | - Wen-Cai Lu
- College of Physics, Qingdao University, Qingdao, Shandong 266071, China and Ames Laboratory-U.S. DOE and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA.
| | - K M Ho
- Ames Laboratory-U.S. DOE and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA.
| | - C Z Wang
- Ames Laboratory-U.S. DOE and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA.
| |
Collapse
|
5
|
Yang F, Kong W, Liu SF, Wang CZ. Structure of a two-dimensional superparamagnetic system in a quadratic trap. Phys Rev E 2020; 102:043213. [PMID: 33212587 DOI: 10.1103/physreve.102.043213] [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] [Received: 08/14/2020] [Accepted: 10/12/2020] [Indexed: 06/11/2023]
Abstract
Ground-state structures of a two-dimensional (2D) system composed of superparamagnetic charged particles are investigated by means of molecular dynamics simulation. The charged particles trapped in a quadratic potential interact with each other via the repulsive, attractive, and magnetic dipole-dipole forces. Simulations are performed within two regimes: a one-component system and a two-component system where the charged particles have the identical charge-to-mass ratio. The effects of magnetic dipole-dipole interaction, mixing ratio of the two species and confinement frequency on the ground-state structures are discussed. It is found that as the strength of the magnetic dipole increases, the charged particles tend to self-organize into chainlike structures. The two species particles exhibit different structural features, depending on the competition of electrostatic repulsive interaction, magnetic dipole-dipole interaction and confinement force. The potential lanes are observed through analyzing the global potential of the magnetic particles, which guide the unmagnetic particles aligning themselves in the direction of the potential lanes.
Collapse
Affiliation(s)
- F Yang
- College of Science, Civil Aviation University of China, Tianjin 300300, China
| | - W Kong
- College of Science, Civil Aviation University of China, Tianjin 300300, China
| | - S F Liu
- School of Physics, Nankai University, Tianjin 300071, China
| | - C Z Wang
- School of Physics, Nankai University, Tianjin 300071, China
| |
Collapse
|
6
|
Yuan PF, Han JN, Fan ZQ, Zhang ZH, Wang CZ. Stable C 2N/h-BN van der Waals heterostructure: flexibly tunable electronic and optic properties. J Phys Condens Matter 2020; 32:475001. [PMID: 32870810 DOI: 10.1088/1361-648x/abaf12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Monolayer C2N has been successfully synthesized. To explore the enhancement of its stability and the expansion of its potential applications in electronics and optoelectronics, a vertical van der Waals heterostructure is constructed by C2N monolayer integrated with h-BN monolayer. The first-principles calculations based on the density functional theory show that this structure possesses a type-II band alignment with a smaller direct band gap and lager band offsets, suggesting that photo-generated electron-hole pairs can be well spatially separated, and thus an excellent photoelectric and photovoltaic material can be obtained. Also shown is that the electronic properties of such a heterostructure can be effectively regulated by a vertical strain and external electric field. For example, under compressive strain or forward electric field, its band gap can be significantly reduced to enhance light-excitation electron transition further, meanwhile the feature of direct band-gap and large band offsets is always well-preserved. Furthermore, it is found that the intrinsic heterostructure holds a wide optic adsorption range and large adsorption coefficient, and the applied compressive strain or a positive electric field can lead to a wide and high main absorption peak across the near-infrared, visible light, and ultraviolet region, implying that a tuned heterostructure has more promising applications in optoelectronics.
Collapse
Affiliation(s)
- P F Yuan
- Hunan Provincial Key Laboratory of Flexible Electronic Materials Genome Engineering, Changsha University of Science and Technology, Changsha 410114, People's Republic of China
| | | | | | | | | |
Collapse
|
7
|
Cheng R, Lu WC, Ho KM, Wang CZ. Characterization of three phases of liquid carbon by tight-binding molecular dynamics simulations. Phys Chem Chem Phys 2020; 22:14630-14636. [DOI: 10.1039/d0cp01875a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have performed tight-binding molecular dynamics simulations to study the structures and properties of liquid carbon with the density ranging from 1.4 to 3.5 g cm−3, and identified three liquid carbon phases at different density regime.
Collapse
Affiliation(s)
- Rong Cheng
- College of Physics and State Key Laboratory of Bio-Fibers and Eco-Textiles
- Qingdao University
- Qingdao
- China
- Ames Laboratory-U.S. DOE and Department of Physics and Astronomy
| | - Wen-Cai Lu
- College of Physics and State Key Laboratory of Bio-Fibers and Eco-Textiles
- Qingdao University
- Qingdao
- China
- Ames Laboratory-U.S. DOE and Department of Physics and Astronomy
| | - K. M. Ho
- Ames Laboratory-U.S. DOE and Department of Physics and Astronomy
- Iowa State University
- Ames
- USA
| | - C. Z. Wang
- Ames Laboratory-U.S. DOE and Department of Physics and Astronomy
- Iowa State University
- Ames
- USA
| |
Collapse
|
8
|
Tang L, Yang ZJ, Wen TQ, Ho KM, Kramer MJ, Wang CZ. Development of interatomic potential for Al–Tb alloys using a deep neural network learning method. Phys Chem Chem Phys 2020; 22:18467-18479. [DOI: 10.1039/d0cp01689f] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The developed deep neural network (DNN) potential can describe the structural properties of the Al90Tb10 liquid and the formation energies of Al–Tb crystals with the accuracy of ab initio calculations.
Collapse
Affiliation(s)
- L. Tang
- Department of Applied Physics
- College of Science
- Zhejiang University of Technology
- Hangzhou
- China
| | - Z. J. Yang
- Department of Applied Physics
- College of Science
- Zhejiang University of Technology
- Hangzhou
- China
| | - T. Q. Wen
- Ames Laboratory-USDOE
- Iowa State University
- Ames
- USA
| | - K. M. Ho
- Ames Laboratory-USDOE
- Iowa State University
- Ames
- USA
- Department of Physics and Astronomy
| | - M. J. Kramer
- Ames Laboratory-USDOE
- Iowa State University
- Ames
- USA
| | - C. Z. Wang
- Ames Laboratory-USDOE
- Iowa State University
- Ames
- USA
- Department of Physics and Astronomy
| |
Collapse
|
9
|
Mendelev MI, Sun Y, Zhang F, Wang CZ, Ho KM. Development of a semi-empirical potential suitable for molecular dynamics simulation of vitrification in Cu-Zr alloys. J Chem Phys 2019; 151:214502. [DOI: 10.1063/1.5131500] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Affiliation(s)
- M. I. Mendelev
- Division of Materials Sciences and Engineering, Ames Laboratory (U.S. Department of Energy), Ames, Iowa 50011, USA
| | - Y. Sun
- Division of Materials Sciences and Engineering, Ames Laboratory (U.S. Department of Energy), Ames, Iowa 50011, USA
| | - F. Zhang
- Division of Materials Sciences and Engineering, Ames Laboratory (U.S. Department of Energy), Ames, Iowa 50011, USA
| | - C. Z. Wang
- Division of Materials Sciences and Engineering, Ames Laboratory (U.S. Department of Energy), Ames, Iowa 50011, USA
| | - K. M. Ho
- Division of Materials Sciences and Engineering, Ames Laboratory (U.S. Department of Energy), Ames, Iowa 50011, USA
- Department of Physics, Iowa State University, Ames, Iowa 50011, USA
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| |
Collapse
|
10
|
Hu F, Kim M, Zhang Y, Luan Y, Ho KM, Shi Y, Wang CZ, Wang X, Fei Z. Tailored Plasmons in Pentacene/Graphene Heterostructures with Interlayer Electron Transfer. Nano Lett 2019; 19:6058-6064. [PMID: 31398046 DOI: 10.1021/acs.nanolett.9b01945] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
van der Waals (vdW) heterostructures, which are produced by the precise assemblies of varieties of two-dimensional (2D) materials, have demonstrated many novel properties and functionalities. Here we report a nanoplasmonic study of vdW heterostructures that were produced by depositing ordered molecular layers of pentacene on top of graphene. We find through nanoinfrared (IR) imaging that surface plasmons formed due to the collective oscillations of Dirac Fermions in graphene are highly sensitive to the adjacent pentacene layers. In particular, the plasmon wavelength declines systematically but nonlinearly with increasing pentacene thickness. Further analysis and density functional theory (DFT) calculations indicate that the observed peculiar thickness dependence is mainly due to the tunneling-type electron transfer from pentacene to graphene. Our work unveils a new method for tailoring graphene plasmons and deepens our understanding of the intriguing nano-optical phenomena due to interlayer couplings in novel vdW heterostructures.
Collapse
Affiliation(s)
- F Hu
- Department of Physics and Astronomy , Iowa State University , Ames , Iowa 50011 , United States
- U.S. DOE Ames Laboratory , Iowa State University , Ames , Iowa 50011 , United States
| | - M Kim
- Department of Physics and Astronomy , Iowa State University , Ames , Iowa 50011 , United States
- U.S. DOE Ames Laboratory , Iowa State University , Ames , Iowa 50011 , United States
| | - Y Zhang
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing 210093 , China
| | - Y Luan
- Department of Physics and Astronomy , Iowa State University , Ames , Iowa 50011 , United States
- U.S. DOE Ames Laboratory , Iowa State University , Ames , Iowa 50011 , United States
| | - K M Ho
- Department of Physics and Astronomy , Iowa State University , Ames , Iowa 50011 , United States
- U.S. DOE Ames Laboratory , Iowa State University , Ames , Iowa 50011 , United States
| | - Y Shi
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing 210093 , China
| | - C Z Wang
- Department of Physics and Astronomy , Iowa State University , Ames , Iowa 50011 , United States
- U.S. DOE Ames Laboratory , Iowa State University , Ames , Iowa 50011 , United States
| | - X Wang
- National Laboratory of Solid State Microstructures, School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing 210093 , China
| | - Z Fei
- Department of Physics and Astronomy , Iowa State University , Ames , Iowa 50011 , United States
- U.S. DOE Ames Laboratory , Iowa State University , Ames , Iowa 50011 , United States
| |
Collapse
|
11
|
Moser D, Sun SJ, Li N, Biere K, Hoerl M, Matzel S, Feuerecker M, Buchheim JI, Strewe C, Thiel CS, Gao YX, Wang CZ, Ullrich O, Long M, Choukèr A. Cells´ Flow and Immune Cell Priming under alternating g-forces in Parabolic Flight. Sci Rep 2019; 9:11276. [PMID: 31375732 PMCID: PMC6677797 DOI: 10.1038/s41598-019-47655-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 12/10/2018] [Accepted: 07/04/2019] [Indexed: 12/31/2022] Open
Abstract
Gravitational stress in general and microgravity (µg) in particular are regarded as major stress factors responsible for immune system dysfunction in space. To assess the effects of alternating µg and hypergravity (hyper-g) on immune cells, the attachment of peripheral blood mononuclear cells (PBMCs) to adhesion molecules under flow conditions and the antigen-induced immune activation in whole blood were investigated in parabolic flight (PF). In contrast to hyper-g (1.8 g) and control conditions (1 g), flow and rolling speed of PBMCs were moderately accelerated during µg-periods which were accompanied by a clear reduction in rolling rate. Whole blood analyses revealed a "primed" state of monocytes after PF with potentiated antigen-induced pro-inflammatory cytokine responses. At the same time, concentrations of anti-inflammatory cytokines were increased and monocytes displayed a surface molecule pattern that indicated immunosuppression. The results suggest an immunologic counterbalance to avoid disproportionate immune responses. Understanding the interrelation of immune system impairing and enhancing effects under different gravitational conditions may support the design of countermeasures to mitigate immune deficiencies in space.
Collapse
Affiliation(s)
- D Moser
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - S J Sun
- Key Laboratory of Microgravity (National Microgravity Laboratory), Center of Biomechanics and Bioengineering, and Beijing Key Laboratory of Engineered Construction and Mechanobiology, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China.,School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - N Li
- Key Laboratory of Microgravity (National Microgravity Laboratory), Center of Biomechanics and Bioengineering, and Beijing Key Laboratory of Engineered Construction and Mechanobiology, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China.,School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - K Biere
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - M Hoerl
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - S Matzel
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - M Feuerecker
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - J-I Buchheim
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - C Strewe
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - C S Thiel
- Institute of Anatomy, Faculty of Medicine, University of Zurich, Zurich, Switzerland.,Department of Machine Design, Engineering Design and Product Development (IMK), Otto-von-Guericke-University Magdeburg, Magdeburg, Germany
| | - Y X Gao
- Key Laboratory of Microgravity (National Microgravity Laboratory), Center of Biomechanics and Bioengineering, and Beijing Key Laboratory of Engineered Construction and Mechanobiology, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China.,School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - C Z Wang
- Key Laboratory of Microgravity (National Microgravity Laboratory), Center of Biomechanics and Bioengineering, and Beijing Key Laboratory of Engineered Construction and Mechanobiology, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China.,School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - O Ullrich
- Institute of Anatomy, Faculty of Medicine, University of Zurich, Zurich, Switzerland.,Department of Machine Design, Engineering Design and Product Development (IMK), Otto-von-Guericke-University Magdeburg, Magdeburg, Germany
| | - M Long
- Key Laboratory of Microgravity (National Microgravity Laboratory), Center of Biomechanics and Bioengineering, and Beijing Key Laboratory of Engineered Construction and Mechanobiology, Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China. .,School of Engineering Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - A Choukèr
- Laboratory of Translational Research "Stress and Immunity", Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany.
| |
Collapse
|
12
|
Ye Z, Meng F, Zhang F, Sun Y, Yang L, Zhou SH, Napolitano RE, Mendelev MI, Ott RT, Kramer MJ, Wang CZ, Ho KM. Observation of η-Al 41Sm 5 reveals motif-aware structural evolution in Al-Sm alloys. Sci Rep 2019; 9:6692. [PMID: 31040308 PMCID: PMC6491476 DOI: 10.1038/s41598-019-43079-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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: 01/15/2018] [Accepted: 01/02/2019] [Indexed: 11/08/2022] Open
Abstract
Using an effective genetic algorithm, we uncover the structure of a metastable Al41Sm5 phase that supplements its family sharing similar short-range orders. The phase evolves upon heating an amorphous Al-9.7 at.% Sm ribbon, produced by melt-spinning. The dynamical phase selection is discussed with respect to the structural connections between the short-range packing motifs in the amorphous precursor and those observed in the selected phases. The phase elucidated here is one of several newly discovered large-unit-cell phases found to form during devitrification from the glass in this binary system, further illustrating the power and efficiency of our approach, the important role of structural hierarchy in phase selection, and the richness of the metastable phase landscape accessible from the glassy structure.
Collapse
Affiliation(s)
- Z Ye
- Ames Laboratory, US Department of Energy, Ames, Iowa, 50011, USA.
| | - F Meng
- Ames Laboratory, US Department of Energy, Ames, Iowa, 50011, USA
| | - F Zhang
- Ames Laboratory, US Department of Energy, Ames, Iowa, 50011, USA
| | - Y Sun
- Ames Laboratory, US Department of Energy, Ames, Iowa, 50011, USA
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - L Yang
- Ames Laboratory, US Department of Energy, Ames, Iowa, 50011, USA
| | - S H Zhou
- Ames Laboratory, US Department of Energy, Ames, Iowa, 50011, USA
| | - R E Napolitano
- Ames Laboratory, US Department of Energy, Ames, Iowa, 50011, USA
- Department of Materials Sci. and Eng., Iowa State University, Ames, Iowa, 50011, USA
| | - M I Mendelev
- Ames Laboratory, US Department of Energy, Ames, Iowa, 50011, USA
| | - R T Ott
- Ames Laboratory, US Department of Energy, Ames, Iowa, 50011, USA
| | - M J Kramer
- Ames Laboratory, US Department of Energy, Ames, Iowa, 50011, USA
| | - C Z Wang
- Ames Laboratory, US Department of Energy, Ames, Iowa, 50011, USA
| | - K M Ho
- Ames Laboratory, US Department of Energy, Ames, Iowa, 50011, USA.
- Department of Physics, Iowa State University, Ames, Iowa, 50011, USA.
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China.
| |
Collapse
|
13
|
Yang ZJ, Tang L, Wen TQ, Ho KM, Wang CZ. Effects of Si solute on the glass formation and atomic structure of Pd liquid. J Phys Condens Matter 2019; 31:135701. [PMID: 30625432 DOI: 10.1088/1361-648x/aafd02] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Molecular dynamics simulations were performed to study the effects of Si solute on the glass formation and crystallization of Pd liquid. Pure Pd samples prepared by a quenching process with a cooling rate of 1013 K s-1 can be in an amorphous state but the structural analysis indicates there is nearly no glass-forming motif in the sample. However, doping a small amount of Si (Si concentration ~4%) the sample can be vitrified at a cooling rate of 1012 K s-1. The glass-forming motifs such as Pd-centered Z13, Si-centered Z9-like and mixed-ICO-cube clusters with five-fold local symmetry are found to be the dominant short-range orders in the glassy samples. With the increasing of the Si-doping concentration, these glass-forming motifs tend to aggregate and connect with each other forming a network structure. Our calculated results revealed that Si solutes in liquid Pd can significantly enhance the glass-forming ability.
Collapse
Affiliation(s)
- Z J Yang
- Department of Applied Physics, College of Science, Zhejiang University of Technology, Hangzhou 310023, People's Republic of China. Ames Laboratory-USDOE, Iowa State University, Ames, IA 50011, United States of America
| | | | | | | | | |
Collapse
|
14
|
Abstract
The crystal structures of boron hydrides in a pressure range of 50-400 GPa were studied using the genetic algorithm (GA) method combined with first-principles density functional theory calculations. BH4 and BH5 are predicted to be thermodynamically unstable. Two new BH2 structures with Cmcm and C2/c space group symmetries, respectively, were predicted, in which the B atoms tend to form two-dimensional sheets. The calculated band structures showed that in the pressure range of 50-150 GPa, the Cmcm-BH2 phase has very small gaps, while the C2/c-BH2 phase at 200-400 GPa is metallic. The superconductivity of the C2/c-BH2 structure was also investigated, and electron-phonon coupling calculations revealed that the estimated Tc values of C2/c-BH2 are about 28.18-37.31 K at 250 GPa.
Collapse
Affiliation(s)
- Wen-Hua Yang
- College of Physics and Laboratory of Fiber Materials and Modern Textile, Growing Base for State Key Laboratory, Qingdao University, Qingdao, Shandong 266071, P. R. China.
| | | | | | | | | | | | | |
Collapse
|
15
|
Lin JT, Xing B, Tang HP, Yang L, Yuan YD, Gu YH, Chen P, Liu XJ, Zhang J, Liu HG, Wang CZ, Zhou W, Sun DJ, Chen YQ, Chen ZC, Huang M, Lin QC, Hu CP, Yang XH, Huo JM, Ye XW, Zhou X, Jiang P, Zhang W, Huang YJ, Dai LM, Liu RY, Cai SX, Xu JY, Zhou JY. [Seasonal distribution of patient hospitalization due to asthma exacerbation in 7 geographic areas in China]. Zhonghua Liu Xing Bing Xue Za Zhi 2019; 39:1477-1481. [PMID: 30462957 DOI: 10.3760/cma.j.issn.0254-6450.2018.11.011] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To understand the seasonal distribution of patient hospitalization due to asthma exacerbation in 7 geographic areas in China. Methods: This was a retrospective study which involved patients hospitalized for asthma exacerbation in 29 hospitals throughout 7 geographic areas in the mainland of China (northeast, north, central, east, south, northwest and southwest). The numbers of asthmatic patients and total inpatients of the respiratory department of each hospital were recorded. The monthly ratio of asthmatic patients to the total inpatients in every area was calculated and compared. Results: During the study period, 6 480 patients were admitted for asthma exacerbation, accounting for 3.14% of all the 206 135 patients admitted to the respiratory departments in the 29 hospitals. The ratio of asthmatic patients to total inpatients in the northeast area (5.61%) was highest, and the ratio in east area was lowest (1.97%). Statistical analysis showed that the difference among different areas was significant (P<0.000 1). In most areas, both the number and proportion of hospitalized asthmatic patients peaked in spring (February-April) and autumn (September-October). In the northeast area, east area and south area, the peaks in spring were more obvious, while in the north area and southwest area, the peaks in autumn were more obvious. In the northwest area the peaks occurred in winter (December-January) and summer (June-August), respectively. The differences in hospitalization due to asthma among different months were significant in the northeast, north, and southwest areas (P<0.005). Conclusion: The number of patients hospitalized for asthma exacerbation fluctuated with season in different areas in China. In most areas, more asthmatic patients were admitted to hospitals in spring and autumn.
Collapse
Affiliation(s)
- J T Lin
- Department of Pulmonary and Critical Care Medicine, China-Japan Friendship Hospital, Beijing 100029, China
| | - B Xing
- Department of Pulmonary and Critical Care Medicine, China-Japan Friendship Hospital, Beijing 100029, China
| | - H P Tang
- Department of Respiration, Qingdao Municipal Hospital, Qingdao 266000, China
| | - L Yang
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - Y D Yuan
- Department of Respiration, The Second Hospital of Hebei Medical University, Shijiazhuang 050000, China
| | - Y H Gu
- Department of Respiration, Qinghai People's Hospital, Xining 810007, China
| | - P Chen
- Department of Respiratory Diseases, The General Hospital of Shenyang Military, Shenyang 110016, China
| | - X J Liu
- Department of Respiration, The First Affiliated Hospital of Lanzhou University, Lanzhou 730000, China
| | - J Zhang
- Department of Pulmonary and Critical Care Medicine, The Second Hospital of Jilin University, Changchun 130041, China
| | - H G Liu
- Department of Respiration, Tongji Hospital, Wuhan 430030, China
| | - C Z Wang
- Department of Respiration, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China
| | - W Zhou
- Department of Respiration, General Hospital of Ningxia Medical University, Yinchuan 750004, China
| | - D J Sun
- Department of Pulmonary and Critical Care Medicine, Inner Mongolia People's Hospital, Hohhot 010017, China
| | - Y Q Chen
- Department of Respiration, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
| | - Z C Chen
- Department of Respiration, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - M Huang
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital with Nanjing Medical University, Nanjing 210029, China
| | - Q C Lin
- Department of Respiration, The First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China
| | - C P Hu
- Department of Respiration, Xiangya Hospital, Changsha 410008, China
| | - X H Yang
- Department of Pulmonary and Critical Care Medicine, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi 830001, China
| | - J M Huo
- Department of Respiration, The First Affiliated Hospital of Harbin Medical University, Harbin 150081, China
| | - X W Ye
- Department of Respiration, Guizhou Provicial People's Hospital, Guiyang 550002, China
| | - X Zhou
- Department of Respiration, Shanghai Center Hospital, Shanghai 200025, China
| | - P Jiang
- Department of Respiration, Tianjin First Center Hospital, Tianjin 300192, China
| | - W Zhang
- Department of Respiration, The First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Y J Huang
- Department of Respiration, Hainan Provincial People's Hospital, Haikou 570311, China
| | - L M Dai
- Department of Respiration, Kunming General Hospital of the People's Liberation Army, Kunming 650032, China
| | - R Y Liu
- Department of Respiration, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - S X Cai
- Department of Respiration, Nanfang Hospital, Guangzhou 510515, China
| | - J Y Xu
- Department of Respiration, Shanxi Dayi Hospital, Taiyuan 030032, China
| | - J Y Zhou
- Department of Respiration, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 310003, China
| |
Collapse
|
16
|
Lin JT, Xing B, Tang HP, Yang L, Yuan YD, Gu YH, Chen P, Liu XJ, Zhang J, Liu HG, Wang CZ, Zhou W, Sun DJ, Chen YQ, Chen ZC, Huang M, Lin QC, Hu CP, Yang XH, Huo JM, Ye XW, Zhou X, Jiang P, Zhang W, Huang YJ, Dai LM, Liu RY, Cai SX, Xu JY, Zhou JY. [Seasonal characteristics of patients hospitalized for asthma exacerbation in China]. Zhonghua Yi Xue Za Zhi 2019; 97:2324-2328. [PMID: 28822447 DOI: 10.3760/cma.j.issn.0376-2491.2017.30.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To study the seasonal characteristics of patients hospitalized for asthma exacerbation in China. Methods: This was a retrospective study which involved patients hospitalized for asthma exacerbation in 29 hospitals throughout mainland China during 2013-2014. The number of patients hospitalized for asthma exacerbation in each hospital was calculated, as well as the ratio of asthmatic patients to all the hospitalized patients. The analysis by month was conducted. The number and ratio of asthmatic patients in the northern and southern cities were calculated respectively. Results: During the study period, there were 6 480 patients hospitalized for asthma exacerbation, accounting for 3.14% (6 480/206 135) of all the hospitalized patients of the respiratory department in 29 hospitals. The analysis by month showed that the ratio of patients hospitalized for asthma exacerbation was highest in March (3.49%), then declined from April to June, then rose again from July, reaching a second peak at September (3.28%), and then declined again from October to December. The ratio of asthmatic patients in every month was higher in northern cities than in southern cities. Conclusions: The ratio of patients hospitalized for asthma exacerbation in China fluctuates with the changes of seasons, and March and September are the two peak months. Northern cities have a higher ratio of asthmatic patients than southern cities.
Collapse
Affiliation(s)
- J T Lin
- Department of Pulmonary and Critical Care Medicine, China-Japan Friendship Hospital, Beijing 100029, China
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Lin JT, Wang WQ, Zhou X, Wang CZ, Huang M, Cai SX, Chen P, Lin QC, Zhou JY, Gu YH, Yuan YD, Sun DJ, Yang XH, Yang L, Huo JM, Chen ZC, Jiang P, Zhang J, Ye XW, Liu HG, Tang HP, Liu RY, Liu CT, Zhang W, Hu CP, Chen YQ, Liu XJ, Dai LM, Zhou W, Huang YJ, Xu JY. [Warning symptoms of asthma attack and asthma self-management: a national asthma control survey from China]. Zhonghua Yi Xue Za Zhi 2019; 97:2329-2332. [PMID: 28822448 DOI: 10.3760/cma.j.issn.0376-2491.2017.30.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate warning symptoms of asthma attack and evaluate asthma self-management status of asthma patients in urban China. Methods: A multi-center, cross-sectional, questionnaire-based survey was carried out from 30 general hospitals dispersed in 30 provinces of mainland China (except for Tibet) during Oct 2015 to May 2016. Information of frequency and warning symptoms of asthma attack, the time from warning symptoms to asthma attack, the impact of asthma attack and asthma self-management were collected from asthma patients of outpatient department. Results: Altogether 3 875 asthmatic outpatients were recruited. 78.1% (3 026/3 875) of the patients reported restriction of exercise and daily activities during asthma exacerbation. 82.5% (3 160/3 829) of the patients had warning symptoms before asthma attack, the most common warning symptoms were cough, chest tightness and shortness of breath. The median time from warning symptoms to asthma attack was 2 h, the mean time was 90 h. Only 4.4% (167/3 829) of the patients had definite confidence to control asthma when symptoms deteriorated. 76.7% (2 937/3 828) of the patients used medications to control asthma when asthma symptoms deteriorated. Medication choice: inhaled corticosteroid (ICS) + formoterol 45.8% (1 776/3 875), short-acting beta-agonist (SABA) 23.9% (927/3 875). Conclusions: Most asthma patients have warning symptoms before asthma attack, the most common symptoms are cough, chest tightness and shortness of breath. The proportion of patients conducting effective asthma self-management remains low.
Collapse
Affiliation(s)
- J T Lin
- Department of Pulmonary and Critical Care Medicine, China-Japan Friendship Hospital, Beijing 100029, China
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Lin JT, Wang WQ, Zhou X, Wang CZ, Huang M, Cai SX, Chen P, Lin QC, Zhou JY, Gu YH, Yuan YD, Sun DJ, Yang XH, Yang L, Huo JM, Chen ZC, Jiang P, Zhang J, Ye XW, Liu HG, Tang HP, Liu RY, Liu CT, Zhang W, Hu CP, Chen YQ, Liu XJ, Dai LM, Zhou W, Huang YJ, Xu JY. [The level of asthma control in China from a national asthma control survey]. Zhonghua Jie He He Hu Xi Za Zhi 2019; 40:494-498. [PMID: 28728272 DOI: 10.3760/cma.j.issn.1001-0939.2017.07.002] [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 assess the overall asthma control level in urban China. Methods: A multi-center, cross-sectional, questionnaire-based survey was carried out in 30 provinces in China (except Tibet). Asthmatic outpatients who met the inclusion criteria were recruited consecutively from 30 sub-centers from October 2015 to May 2016. Data of demographic characteristics, asthma control, asthma management, asthma exacerbations and self-management, and disease perception were collected by face-to-face interviews. Results: Totally 3 875 asthmatic outpatients were recruited. Asthma control level was assessed according to GINA 2015. The prevalence of asthma control was 28.5%(1 099/3 854). Among 10 cities, which were also involved in the asthma control survey in 2008, the level of asthma control improved from 28.7% in 2008 to 39.2%(533/1 361) in 2016. The rate of hospitalizations due to asthma exacerbations was 26.4%(1 017/3 858) and the rate of emergency visits was 22.4%(864/3 858). Among adult patients, 18.4%(568/3 092) of them had been absent from work while 63.6%(63/99) adolescent patients had been absent from school because of asthma attacks in the previous year. Conclusion: Although the level of asthma control in China is still far from ideal at present, the status has been improved in some cities. Poorly controlled asthma resulted in increase of hospitalizations, emergency department visits and work/school absences.
Collapse
Affiliation(s)
- J T Lin
- Department of Pulmonary and Critical Care Medicine, China-Japan Friendship Hospital, Beijing 100029, China
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Lin JT, Xing B, Tang HP, Yang L, Yuan YD, Gu YH, Chen P, Liu XJ, Zhang J, Liu HG, Wang CZ, Zhou W, Sun DJ, Chen YQ, Chen ZC, Huang M, Lin QC, Hu CP, Yang XH, Huo JM, Ye XW, Zhou X, Jiang P, Zhang W, Huang YJ, Dai LM, Liu RY, Cai SX, Xu JY, Zhou JY. [A multi-center retrospective study of clinical characteristics and hospitalization costs of patients hospitalized for asthma exacerbation in China during 2013-2014]. Zhonghua Jie He He Hu Xi Za Zhi 2019; 40:830-834. [PMID: 29320830 DOI: 10.3760/cma.j.issn.1001-0939.2017.11.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To study the characteristics of patients hospitalized for asthma exacerbation in 29 teaching hospitals in China and to evaluate the hospitalization costs of these patients. Methods: This was a retrospective study and involved patients hospitalized for asthma exacerbation in 29 hospitals throughout China during 2013-2014. Information about the demographic features, conditions before the admission, the outcome, the complications, and the costs was collected using the pre-designed case report form. The influencing factors of the hospitalization costs were analyzed. Results: 3 240 asthmatic patients (1 369 males and 1 871 females) were included and data were analyzed. There were 41.5% (1 346/3 240) patients who had a history of previous hospitalization or emergency department visits during the last year. Only 28.0% (907/3 240) patients had used asthma-controlling medications regularly before the admission. Seventy-three(2.3%) patients were admitted to ICU and used mechanical ventilation. Mortality among these patients hospitalized for asthma exacerbation was 0.25% (8/3 240). The median hospitalization costs was 9 045(6 431, 13 035) RMB. The costs of medications, examinations and treatment accounted for 52.1%, 27.6%, and 9.6% respectively. The costs of asthma medications accounted for only 22.7% of the total medication costs, while the costs of antibiotics accounted for 44.0%. The patients who were admitted to ICU, used mechanical ventilation, complicated with pneumonia, or had a history of hospitalization or emergency department visits during the last year due to asthma exacerbations tended to cost more. Conclusion: In this study, we demonstrated that only a minority of the patients had used asthma controllers regularly before the admissions with exacerbations. The in-hospital mortality of asthma patients in this study was much lower than that reported in other countries. The average cost of hospitalization was much higher than the yearly cost of maintenance therapy. Medication was the predominant component of the total hospitalization costs, and the costs of antibiotics made up the major part of the total medication costs.
Collapse
Affiliation(s)
- J T Lin
- Department of Pulmonary and Critical Care Medicine, China-Japan Friendship Hospital, Beijing 100029, China
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Xing B, Lin JT, Tang HP, Yang L, Yuan YD, Gu YH, Chen P, Liu XJ, Zhang J, Liu HG, Wang CZ, Zhou W, Sun DJ, Chen YQ, Chen ZC, Huang M, Lin QC, Hu CP, Yang XH, Huo JM, Ye XW, Zhou X, Jiang P, Zhang W, Huang YJ, Dai LM, Liu RY, Cai SX, Xu JY, Zhou JY. [A retrospective study of the treatment of patients hospitalized for asthma exacerbation in China]. Zhonghua Yi Xue Za Zhi 2018. [PMID: 29534393 DOI: 10.3760/cma.j.issn.0376-2491.2018.08.014] [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 study the treatment of patients hospitalized for asthma exacerbation in China. Methods: This was a retrospective study and involved patients hospitalized for asthma exacerbation in 29 hospitals throughout China during Jan 2013 to Dec 2014. Information of the demographic features, the severity of the exacerbation, the medicine prescribed during the hospitalization and the use of mechanical ventilation were collected and analyzed. Results: During the study period, there were 3 240 patients hospitalized for asthma exacerbation, and 1 369(42.3%) of them were males 1 871(57.7%)were females. Patients of mild, moderate, severe, and life-threatening exacerbation counted for 41.7%, 37.8%, 19.2% and 1.0%, respectively of the total patients. Of all the patients, 72.6% used bronchodilators by nebulizer, 70.8% used inhaled corticosteroids by nebulizer, 60.5% used intravenous corticosteroids, 17.3% used oral corticosteroids, and 80.5% used antibiotics. The percentages of patients using systemic corticosteroids and antibiotics were higher in patients with more severe exacerbation. In patients with mild exacerbation, there were 74.9% and 52.2% who used antibiotics and systemic corticosteroids, respectively. A total of 73 patients (2.3%) used mechanical ventilation, and 62 of them used noninvasive ventilation, 16 used invasive ventilation, and 5 used both. Conclusions: Nebulizer therapy has been accepted as the main administration route of medicine in the treatment of asthma exacerbation. A large amount of patients used antibiotics and systemic corticosteroids during hospitalization, indicating there may be some overuse of these medicines.
Collapse
Affiliation(s)
- B Xing
- Department of Pulmonary and Critical Care Medicine, China-Japan Friendship Hospital, Beijing 100029, China
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Wang WQ, Lin JT, Zhou X, Wang CZ, Huang M, Cai SX, Chen P, Lin QC, Zhou JY, Gu YH, Yuan YD, Sun DJ, Yang XH, Yang L, Huo JM, Chen ZC, Jiang P, Zhang J, Ye XW, Liu HG, Tang HP, Liu RY, Liu CT, Zhang W, Hu CP, Chen YQ, Liu XJ, Dai LM, Zhou W, Huang YJ, Xu JY. [Evaluation of asthma disease perception from China national asthma control survey]. Zhonghua Yi Xue Za Zhi 2018; 98:467-471. [PMID: 29429262 DOI: 10.3760/cma.j.issn.0376-2491.2018.06.015] [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: In order to evaluate disease perception of asthma patients in urban China and provide evidence for further specific patient education. Methods: A multi-center, cross-sectional, questionnaire-based survey was carried out in 30 general hospitals dispersed in 30 provinces of mainland China (except for Tibet) during Oct 2015 to May 2016. Information of disease perception [Question 1: the disease nature of asthma; Question 2: medication choice of first-line in chronic asthma; Question 3: the occasion of using short-acting aerosols of receptor agonists; Question 4: perception of asthma treatment goal; Question 5: reason for not using peak flow meter (PFM)] were collected from asthma patients of outpatient department. These results were compared with the same type of survey results from 2007-2008. Results: Altogether 3 875 asthmatic outpatients were recruited. 69.0% (2 660/3 857) of the patients had right perception on the disease nature of asthma, 60.2% (2 321/3 857) of the patients considered inhaled corticosteroids (ICS)/inhaled corticosteroids plus long-acting beta2-agonists (ICS+ LABA) as daily-used first-line medication for chronic asthma. 85.7% (3 277/3 823) of the patients had right perception on the condition of using short-acting beta2-agonists (SABA). 75.4% (2 761/3 661) of the patients had right perception on asthma treatment goal. Only 10.1% (388/3 837) of the patients used PFM. Of the reasons for not using PFM, 65.2% (2 518/3 860) of the patients chose doctors never introduced. Among the 10 cities, which were also involved in the asthma control survey in 2007-2008, 71.1% (968/1 361) of the patients had right perception on the disease nature of asthma, 61.6% (839/1 362) of the patients considered ICS/ICS+ LABA as daily-used first-line medication for chronic asthma. 88.7% (1 207/1 361) of the patients had right perception on the condition of using SABA. 74.5% (1 013/1 360) of the patients had right perception on asthma treatment goal. 17.9% (244/1 360) of the patients used PFM. Of the reasons for not using PFM, 76.2% (931/1 221) of the patients chose doctors never introduced. Compared to the survey conducted in 2007-2008, the perception on disease nature and medication choice as daily-used first-line medication for chronic asthma significantly improved, the perception on occasion of using SABA and asthma treatment goal was comparable, while the rate of PFM usage showed no significant improvement. In reasons of not using PFM, doctors never introduced ranked the first. Conclusions: Compared to the similar survey conducted in 2007-2008, the overall status of disease perception of asthma patients has been improved in urban China, while the rate of PFM usage showed no significant improvement. Asthma education on asthma and asthma self-management should be further pushed forward.
Collapse
Affiliation(s)
- W Q Wang
- Department of Pulmonary and Critical Care Medicine, China-Japan Friendship Hospital, Beijing 100029, China
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Lin JT, Xing B, Tang HP, Yang L, Yuan YD, Gu YH, Chen P, Liu XJ, Zhang J, Liu HG, Wang CZ, Zhou W, Sun DJ, Chen YQ, Chen ZC, Huang M, Lin QC, Hu CP, Yang XH, Huo JM, Ye XW, Zhou X, Jiang P, Zhang W, Huang YJ, Dai LM, Liu RY, Cai SX, Xu JY, Zhou JY. [A retrospective study of the mortality and death-related risk factors of patients hospitalized for asthma exacerbation in Chinese urban areas]. Zhonghua Yi Xue Za Zhi 2018; 98:2760-2763. [PMID: 30220175 DOI: 10.3760/cma.j.issn.0376-2491.2018.34.016] [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 study the mortality and death-related risk factors of patients hospitalized for asthma exacerbation in Chinese urban areas. Methods: A retrospective study was carried out in 29 hospitals of 29 provinces throughout mainland China. Patients hospitalized for asthma exacerbation during 2013-2014 in each hospital were included. For each patient, information about demography, admission time, comorbidities, severity of diseases, intense care unit (ICU) admission, use of mechanical ventilation and the outcome was obtained. The mortality of patients hospitalized for asthma exacerbation was calculated, and the basic information and causes of death of the patients who died were summarized. The death-related risk factors and numbers of comorbidities were compared between the patients who survived and those who died during hospitalization. Results: A total of 3 240 patients (median age 57.0) were included and among them 8 patients (median age 68.5) died. The mortality of patients hospitalized for asthma exacerbation was 0.25%. All the patients who died were admitted during the winter and spring. One patient died of acute myocardial infarction, one of cardiac shock, one of tension pneumothorax, one of sudden death, one of respiratory failure and three of unknown causes. The average number of comorbidities of patients who died was 1.10, larger than that of patients who survived (0.83) (P>0.05). More patients had diabetes, coronary artery diseases and hypertension as comorbidities in the patients who died (2/8) than those who survived[7.6% (246/3 232), 7.6% (246/3 232), 22.6% (731/3 232), respectively](all P>0.05). Conclusions: The in-hospital mortality of patients hospitalized for asthma exacerbation of China in this study is low. The patients who died are much older, and with more comorbidities, and a higher percentage of comorbidities such as diabetes, coronary artery diseases, and hypertension.
Collapse
Affiliation(s)
- J T Lin
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, National Clinical Research Centre for Respiratory Medicine, Beijing 100029, China
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Yu HB, Yang MH, Sun Y, Zhang F, Liu JB, Wang CZ, Ho KM, Richert R, Samwer K. Fundamental Link between β Relaxation, Excess Wings, and Cage-Breaking in Metallic Glasses. J Phys Chem Lett 2018; 9:5877-5883. [PMID: 30240226 DOI: 10.1021/acs.jpclett.8b02629] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In glassy materials, the Johari-Goldstein secondary (β) relaxation is crucial to many properties as it is directly related to local atomic motions. However, a long-standing puzzle remains elusive: why some glasses exhibit β relaxations as pronounced peaks while others present as unobvious excess wings? Using microsecond atomistic simulation of two model metallic glasses (MGs), we demonstrate that such a difference is associated with the number of string-like collective atomic jumps. Relative to that of excess wings, we find that MGs having pronounced β relaxations contain larger numbers of such jumps. Structurally, they are promoted by the higher tendency of cage-breaking events of their neighbors. Our results provide atomistic insights for different signatures of the β relaxation that could be helpful for understanding the low-temperature dynamics and properties of MGs.
Collapse
Affiliation(s)
- Hai-Bin Yu
- Wuhan National High Magnetic Field Center and School of Physics , Huazhong University of Science and Technology , WuHan , Hubei 430074 , China
| | - Meng-Hao Yang
- Ames Laboratory, U.S. Department of Energy , Ames , Iowa 50011 , United States
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering , Tsinghua University , Beijing 100084 , China
| | - Yang Sun
- Ames Laboratory, U.S. Department of Energy , Ames , Iowa 50011 , United States
| | - Feng Zhang
- Ames Laboratory, U.S. Department of Energy , Ames , Iowa 50011 , United States
| | - Jian-Bo Liu
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering , Tsinghua University , Beijing 100084 , China
| | - C Z Wang
- Ames Laboratory, U.S. Department of Energy , Ames , Iowa 50011 , United States
- Department of Physics , Iowa State University , Ames , Iowa 50011 , United States
| | - K M Ho
- Ames Laboratory, U.S. Department of Energy , Ames , Iowa 50011 , United States
- Department of Physics , Iowa State University , Ames , Iowa 50011 , United States
| | - Ranko Richert
- School of Molecular Sciences , Arizona State University , Tempe , Arizona 85287 , United States
| | - Konrad Samwer
- I. Physikalisches Institut, Universität Göttingen , D-37077 Göttingen , Germany
| |
Collapse
|
24
|
Nong Y, Lin JT, Wang WQ, Zhou X, Wang CZ, Huang M, Cai SX, Chen P, Lin QC, Zhou JY, Gu YH, Yuan YD, Sun DJ, Yang XH, Yang L, Huo JM, Chen ZC, Jiang P, Zhang J, Ye XW, Liu HG, Tang HP, Liu RY, Liu CT, Zhang W, Hu CP, Chen YQ, Liu XJ, Dai LM, Zhou W, Huang YJ, Xu JY. [A multi-center study for the association between the perception and control of disease among asthmatic patients in Chinese urban areas]. Zhonghua Yi Xue Za Zhi 2018; 97:1425-1429. [PMID: 28535631 DOI: 10.3760/cma.j.issn.0376-2491.2017.18.015] [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 current perception of disease among asthmatic patients in Chinese urban areas, and to address its association with asthma control. Methods: This was a nationwide, multi-center, cross-sectional study covering 30 third-level, grade A hospitals in 30 provinces, municipalities and autonomous regions (not including Tibet) across Chinese mainland. The survey was carried out from October 2015 to May 2016. Asthmatic outpatients were selected to receive face-to-face questionnaire survey on asthma control including Asthma Control Test (ACT) score, classification of asthma control level[according to the Global Initiative for Asthma (GINA) 2015 classification system, as assessed by the physician completing the survey], perception of asthma (including question 1: nature of asthma as a disease; question 2: selection of first-line therapeutic agents to be regularly used daily for asthma; question 3: appropriate timing of the use of short-acting aerosols of β(2) receptor agonists; and question 4: therapeutic goals for asthma). Results: A total of 3 875 asthmatic outpatients were included; among them, 69.0% (2 660/3 857) were aware that asthma is "an airway inflammatory disorder resulting from the combined effects of heredity and environment" ; 60.2% (2 321/3 857) considered "inhaled glucocorticoids or their compound preparations" to be the first-line therapeutic agents to be regularly used daily for patients with persistent chronic asthma; 85.7% (3 277/3 823) considered it appropriate to use short-acting aerosols of β(2) receptor agonists "as needed in the event of disease aggravation or acute exacerbation" ; and 75.4% (2 761/3 661) were aware that asthma "can be adequately or completely controlled in the long term" . The ACT score[20 (16, 23) vs 19 (16, 22) points; Z=-3.928, P<0.001]and asthma control rate (29.92% vs 25.31%; χ(2)=8.616, P=0.003) were significantly higher, and the rate of uncontrolled asthma (19.92% vs 23.48%; χ(2)=6.267, P=0.012) was significantly lower among the 2 660 (69.0%) patients correctly answering question 1 than among the 1 197 (31.0%) patients giving incorrect answer. The ACT score[21 (17, 23) vs 19 (15, 22) points; Z=-9.190, P<0.001] and asthma control rate (32.66% vs 22.20%; χ(2)=49.614, P<0.001) were significantly higher, and the rate of uncontrolled asthma (18.40% vs 25.00%; χ(2)=24.267, P<0.001) was significantly lower among the 2 321 (60.2%) patient correctly answering question 2 than among the 1 536 (39.8%) patients giving incorrect answer. Conclusions: Compared to previous surveys, there has been improved perception of disease among asthmatic patients in Chinese urban areas. Correct perception of disease is favorable for improving asthma control level.
Collapse
Affiliation(s)
- Y Nong
- Department of Respiratory and Critical Care Medicine, China-Japan Friendship Hospital, Beijing 100029, China
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Mendelev MI, Zhang F, Song H, Sun Y, Wang CZ, Ho KM. Molecular dynamics simulation of the solid-liquid interface migration in terbium. J Chem Phys 2018; 148:214705. [DOI: 10.1063/1.5026922] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Affiliation(s)
- M. I. Mendelev
- Division of Materials Sciences and Engineering, Ames Laboratory (US Department of Energy), Ames, Iowa 50011, USA
| | - F. Zhang
- Division of Materials Sciences and Engineering, Ames Laboratory (US Department of Energy), Ames, Iowa 50011, USA
| | - H. Song
- Division of Materials Sciences and Engineering, Ames Laboratory (US Department of Energy), Ames, Iowa 50011, USA
| | - Y. Sun
- Division of Materials Sciences and Engineering, Ames Laboratory (US Department of Energy), Ames, Iowa 50011, USA
| | - C. Z. Wang
- Division of Materials Sciences and Engineering, Ames Laboratory (US Department of Energy), Ames, Iowa 50011, USA
| | - K. M. Ho
- Division of Materials Sciences and Engineering, Ames Laboratory (US Department of Energy), Ames, Iowa 50011, USA
- Department of Physics, Iowa State University, Ames, Iowa 50011, USA
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| |
Collapse
|
26
|
Abstract
The marginal glass-forming ability (GFA) of a binary Ni-Zr system is an issue to be explained considering numerous bulk metallic glasses (BMGs) found in a Cu-Zr system. Using molecular dynamics, the structures and dynamics of Ni50Zr50 metallic liquid and glass are investigated at the atomistic level. To achieve a well-relaxed glassy sample, a sub-Tg annealing method is applied and the final sample is closer to the experiments than the models prepared by continuous cooling. With the state-of-the-art structural analysis tools such as cluster alignment and pair-wise alignment methods, two glass-forming motifs with some mixed traits of a metastable B2 crystalline phase and a crystalline Ni-centered B33 motif are found to be dominant in the undercooled liquid and glass samples. A new chemical order characterization on each short-range order (SRO) structure is accomplished based on the cluster alignment method. The significant amount of the crystalline motif and the few icosahedra in the glassy sample deteriorate the GFA.
Collapse
Affiliation(s)
- T Q Wen
- MOE Key Laboratory of Materials Physics and Chemistry under Extraordinary Conditions, School of Natural and Applied Sciences, Northwestern Polytechnical University, Xi'an 710072, China.
| | | | | | | | | | | |
Collapse
|
27
|
Abstract
Using a combination of adaptive genetic algorithm search, motif-network search scheme and first-principles calculations, we have systematically studied the low-energy crystal structures of Na2FeSiO4. We show that the low-energy crystal structures with different space group symmetries can be classified into several families based on the topologies of their Fe-Si networks. In addition to the diamond-like network which is shared by most of the low-energy structures, another three robust Fe-Si networks are also found to be stable during the charge/discharge process. The electrochemical properties of representative structures from these four different Fe-Si networks in Na2FeSiO4 and Li2FeSiO4 are investigated and found to be strongly correlated with the Fe-Si network topologies. Our studies provide a new route to characterize the crystal structures of Na2FeSiO4 and Li2FeSiO4 and offer useful guidance for the design of promising cathodes for Na/Li ion batteries.
Collapse
Affiliation(s)
- P Wu
- International Center for Quantum Design of Functional Materials (ICQD), Hefei National Laboratory for Physical Sciences at Microscale and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - S Q Wu
- Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, China.
| | - X Lv
- Department of Physics and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei 230026, China
| | - X Zhao
- Ames Laboratory, US DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA.
| | - Z Ye
- Ames Laboratory, US DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA.
| | - Z Lin
- Department of Physics and Collaborative Innovation Center of Suzhou Nano Science and Technology, University of Science and Technology of China, Hefei 230026, China
| | - C Z Wang
- Ames Laboratory, US DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA.
| | - K M Ho
- International Center for Quantum Design of Functional Materials (ICQD), Hefei National Laboratory for Physical Sciences at Microscale and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China and Ames Laboratory, US DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA.
| |
Collapse
|
28
|
Guo YR, Dong F, Qiao C, Wang JJ, Wang SY, Xu M, Zheng YX, Zhang RJ, Chen LY, Wang CZ, Ho KM. Structural signature and transition dynamics of Sb2Te3 melt upon fast cooling. Phys Chem Chem Phys 2018; 20:11768-11775. [DOI: 10.1039/c8cp00142a] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Sb-centered defective octahedrons connect with each other via four-fold rings, a close link of the four-fold ring and defective octahedrons in amorphous Sb2Te3 has been revealed.
Collapse
Affiliation(s)
- Y. R. Guo
- Shanghai Ultra-Precision Optical Manufacturing Engineering Center and Department of Optical Science and Engineering, Fudan University
- Shanghai
- China
| | - F. Dong
- Shanghai Ultra-Precision Optical Manufacturing Engineering Center and Department of Optical Science and Engineering, Fudan University
- Shanghai
- China
| | - C. Qiao
- Shanghai Ultra-Precision Optical Manufacturing Engineering Center and Department of Optical Science and Engineering, Fudan University
- Shanghai
- China
| | - J. J. Wang
- Shanghai Ultra-Precision Optical Manufacturing Engineering Center and Department of Optical Science and Engineering, Fudan University
- Shanghai
- China
| | - S. Y. Wang
- Shanghai Ultra-Precision Optical Manufacturing Engineering Center and Department of Optical Science and Engineering, Fudan University
- Shanghai
- China
- Key Laboratory for Information Science of Electromagnetic Waves (MoE)
- Shanghai 200433
| | - Ming Xu
- School of Optical & Electronic Information, Huazhong University of Science & Technology
- Wuhan
- China
| | - Y. X. Zheng
- Shanghai Ultra-Precision Optical Manufacturing Engineering Center and Department of Optical Science and Engineering, Fudan University
- Shanghai
- China
| | - R. J. Zhang
- Shanghai Ultra-Precision Optical Manufacturing Engineering Center and Department of Optical Science and Engineering, Fudan University
- Shanghai
- China
| | - L. Y. Chen
- Shanghai Ultra-Precision Optical Manufacturing Engineering Center and Department of Optical Science and Engineering, Fudan University
- Shanghai
- China
| | - C. Z. Wang
- Ames Laboratory, U. S. Department of Energy and Department of Physics and Astronomy, Iowa State University
- Ames
- USA
| | - K. M. Ho
- Ames Laboratory, U. S. Department of Energy and Department of Physics and Astronomy, Iowa State University
- Ames
- USA
| |
Collapse
|
29
|
Wang Z, Cao X, Qiao C, Zhang RJ, Zheng YX, Chen LY, Wang SY, Wang CZ, Ho KM, Fan YJ, Jin BY, Su WS. Novel penta-graphene nanotubes: strain-induced structural and semiconductor-metal transitions. Nanoscale 2017; 9:19310-19317. [PMID: 29192922 DOI: 10.1039/c7nr06835b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Research into novel one-dimensional (1D) materials and associated structural transitions is of significant scientific interest. It is widely accepted that a 1D system with a short-range interaction cannot have 1D phase transition at finite temperature. Herein, we propose a series of new stable carbon nanotubes by rolling up penta-graphene sheets, which exhibit fascinating well-defined 1D phase transitions triggered by axial strain. Our first-principles calculations show that such penta-graphene nanotubes (PGNTs) are dynamically stable by phonon calculations, but transform from a tri-layer structure to a highly defective single-walled nanotube at low temperature in molecular dynamics simulations. We show that moderate compressive strains can drive structural transitions of (4,4), (5,5), and (6,6) PGNTs, during which the distances of neighboring carbon dimers in the inner shell have a sudden drop, corresponding to dimer-dimer nonbonding to bonding transitions. After such transition, the tubes become much more thermally stable and undergo semiconductor-metal transitions under increasing strain. The band gaps of PGNTs are not sensitive to chirality whereas they can be tuned effectively from visible to short-wavelength infrared by appropriate strain, making them appealing materials for flexible nano-optoelectronics. These findings provide useful insight into unusual phase transitions in low-dimensional systems.
Collapse
Affiliation(s)
- Zhanyu Wang
- Shanghai Ultra-Precision Optical Manufacturing Engineering Center and Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Wang CZ, Wen SQ, Shi MS, Yu XE, Wang XJ, Pan YL, Zhang YF, Li H, Tan JZ. [Identification of Y-chromosomal Genetic Types for the Soldier's Remains from Huaihai Campaign]. Fa Yi Xue Za Zhi 2017; 33:357-362. [PMID: 29219264 DOI: 10.3969/j.issn.1004-5619.2017.04.005] [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] [Received: 03/18/2016] [Indexed: 11/18/2022]
Abstract
OBJECTIVES To identify the Y-chromosomal genetic types for the soldier's remains from Huaihai Campaign, and to offer a clue for search of their paternal relatives. METHODS DNA of the remains were extracted by the ancient DNA extraction method. Yfiler kit was used for the multiplex amplification of 17 Y-STR loci. The haplogroups of the samples were speculated. Detailed genotyping of the selected Y-SNP was performed based on the latest Y-chromosome phylogenetic tree. Haplotype-sharing analysis was done based on the data of Y-SNP and Y-STR, the closest modern individual information to the genetic relationship of remains was gained. RESULTS A total of 8 Y-STR haplotypes were observed on 17 Y-STR loci of 8 male individuals. Furthermore, 6 Y-SNP haplogroups were identified, which were O2a1-M95+, O1a1-P203+, O3*-M122+/M234-, D1-M15+, C3*-ST and R1a1-M17+. CONCLUSIONS Identification of Y-chromosomal genetic types for the soldier's remains from Huaihai Campaign shows a reference value on inferring the geographical origins of old materials.
Collapse
Affiliation(s)
- C Z Wang
- MOE Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - S Q Wen
- MOE Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - M S Shi
- Key Laboratory of Evidence Law and Forensic Science, Ministry of Education, China University of Political Science and Law, Beijing 100088, China
| | - X E Yu
- MOE Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - X J Wang
- Natural History Research Center, Shanghai Science and Technology Museum, Shanghai 200127, China
| | - Y L Pan
- Natural History Research Center, Shanghai Science and Technology Museum, Shanghai 200127, China
| | - Y F Zhang
- Natural History Research Center, Shanghai Science and Technology Museum, Shanghai 200127, China
| | - H Li
- MOE Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - J Z Tan
- MOE Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai 200438, China
| |
Collapse
|
31
|
Lin JT, Zhang YM, Zhou X, Wang CZ, Huang M, Liu CT, Wu CG, Wan HY, Yu WC, Dai YR. [Chinese expert consensus for non-antiinfective effects and clinical use of macrolides]. Zhonghua Nei Ke Za Zhi 2017; 56:546-557. [PMID: 28693067 DOI: 10.3760/cma.j.issn.0578-1426.2017.07.015] [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
Important/potential value of macrolides has been proved in the management of chronic respiratory diseases by increasing basic and clinical trials.Through three face-to-face discussions, 10 experts examined important data and drafted this consensus related to macrolides: (1) mechanism of non-antiinfective effects; (2) clinical use in chronic respiratory diseases; (3) cautions of long-term use.The mechanism out of non-antiinfective effects includes anti-inflammatory effect, modifying airway secretion, immune-regulation related to antibacterial effect, corticoid saving effect and anti-viral effect.The efficacy of long-term use of low-dose macrolides is definitely confirmed in diffuse panbronchiolitis, chronic rhinosinusitis. It is considerably used in bronchiectasia, cystic fibrosis, severe asthma and chronic obstructive pulmonary disease. Further studies should be conducted in cryptogenic organizing pneumonia and respiratory viral infection. It should be paid attention to its possible adverse effects (including drug interactions, cardiac toxicity, ototoxicity and disturbance of intestinal flora) and drug resistance in long-term use.A Chinese consensus for non-antiinfective effects and clinical use of macrolides is developed for the first time, which aims to expand their rational use and the further research.
Collapse
Affiliation(s)
- J T Lin
- Department of Respiratory and Critical Care Medicine, China-Japan Friendship Hospital, Beijing 100029, China
| | | | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Affiliation(s)
- Li-Zhen Zhao
- College
of Physics and Laboratory of Fiber Materials and Modern Textile, the
Growing Base for State Key Laboratory, Qingdao University, Qingdao, Shandong 266071, P. R. China
| | - Wen-Cai Lu
- College
of Physics and Laboratory of Fiber Materials and Modern Textile, the
Growing Base for State Key Laboratory, Qingdao University, Qingdao, Shandong 266071, P. R. China
- Institute
of Theoretical Chemistry, Jilin University, Changchun, Jilin 130021, P. R. China
| | - Wei Qin
- College
of Physics and Laboratory of Fiber Materials and Modern Textile, the
Growing Base for State Key Laboratory, Qingdao University, Qingdao, Shandong 266071, P. R. China
| | - Qing-Jun Zang
- College
of Physics and Laboratory of Fiber Materials and Modern Textile, the
Growing Base for State Key Laboratory, Qingdao University, Qingdao, Shandong 266071, P. R. China
| | - K. M. Ho
- Ames
Laboratory-U.S. DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, United States
| | - C. Z. Wang
- Ames
Laboratory-U.S. DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, United States
| |
Collapse
|
33
|
Abstract
In this work, the crystal structures of YH3 and YH4 at high pressure (100-250 GPa) have been explored using a genetic algorithm combined with first-principles calculations. New structures of YH3 with space group symmetries of P21/m and I4/mmm were predicted. The electronic structures and the phonon dispersion properties of various YH3 and YH4 structures at different temperatures and pressures were investigated. Among YH3 phases, the P21/m structure of YH3 was found to have a relatively high superconducting transformation temperature T c of 19 K at 120 GPa, which is reduced to 9 K at 200 GPa. Other YH3 structures have much lower T cs. Compared with YH3, the T c of the YH4 compound is much higher, i.e. 94 K at 120 GPa and 55 K at 200 GPa.
Collapse
Affiliation(s)
- Lu-Lu Liu
- College of Physics and Laboratory of Fiber Materials and Modern Textile, Growing Base for State Key Laboratory, Qingdao University, Qingdao, Shandong 266071, People's Republic of China
| | | | | | | |
Collapse
|
34
|
Bajc M, Chen Y, Wang J, Li XY, Shen WM, Wang CZ, Huang H, Lindqvist A, He XY. Identifying the heterogeneity of COPD by V/P SPECT: a new tool for improving the diagnosis of parenchymal defects and grading the severity of small airways disease. Int J Chron Obstruct Pulmon Dis 2017; 12:1579-1587. [PMID: 28603413 PMCID: PMC5457181 DOI: 10.2147/copd.s131847] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [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] [Indexed: 12/22/2022] Open
Abstract
Introduction Airway obstruction and possible concomitant pulmonary diseases in COPD cannot be identified conventionally with any single diagnostic tool. We aimed to diagnose and grade COPD severity and identify pulmonary comorbidities associated with COPD with ventilation/perfusion single-photon emission computed tomography (V/P SPECT) using Technegas as the functional ventilation imaging agent. Methods 94 COPD patients (aged 43–86 years, Global Initiative for Chronic Obstructive Lung Disease (GOLD) stages I–IV) were examined with V/P SPECT and spirometry. Ventilation and perfusion defects were analyzed blindly according to the European guidelines. Penetration grade of Technegas in V SPECT measured the degree of obstructive small airways disease. Total preserved lung function and penetration grade of Technegas in V SPECT were assessed by V/P SPECT and compared to GOLD stages and spirometry. Results Signs of small airway obstruction in the ventilation SPECT images were found in 92 patients. Emphysema was identified in 81 patients. Two patients had no signs of COPD, but both of them had a pulmonary embolism, and in one of them we also suspected a lung tumor. The penetration grade of Technegas in V SPECT and total preserved lung function correlated significantly to GOLD stages (r=0.63 and −0.60, respectively, P<0.0001). V/P SPECT identified pulmonary embolism in 30 patients (32%). A pattern typical for heart failure was present in 26 patients (28%). Parenchymal changes typical for pneumonia or lung tumor were present in several cases. Conclusion V/P SPECT, using Technegas as the functional ventilation imaging agent, is a new tool to diagnose COPD and to grade its severity. Additionally, it revealed heterogeneity of COPD caused by pulmonary comorbidities. The characteristics of these comorbidities suggest their significant impact in clarifying symptoms, and also their influence on the prognosis.
Collapse
Affiliation(s)
- M Bajc
- Department of Clinical Science Physiology and Nuclear Medicine, Skåne University Hospital, Lund, Sweden
| | - Y Chen
- Respiratory Department, Changzheng Hospital, Shanghai
| | - J Wang
- Respiratory Department, Xinqiao Hospital, Chongqing
| | - X Y Li
- Respiratory Department, Huadong Hospital, Shanghai, China
| | - W M Shen
- Respiratory Department, Huadong Hospital, Shanghai, China
| | - C Z Wang
- Respiratory Department, Xinqiao Hospital, Chongqing
| | - H Huang
- Respiratory Department, Changzheng Hospital, Shanghai
| | - A Lindqvist
- Department of Pulmonary Medicine, Heart and Lung Center, Helsinki University Hospital and Helsinki University, Helsinki, Finland
| | - X Y He
- Suzhou University Affiliated Tumor Hospital, Wuxi, China
| |
Collapse
|
35
|
Dong F, Yue GQ, Guo YR, Qiao C, Wang ZY, Zheng YX, Zhang RJ, Sun Y, Su WS, Kramer MJ, Wang SY, Wang CZ, Ho K, Chen LY. Si-centered capped trigonal prism ordering in liquid Pd82Si18 alloy study by first-principles calculations. RSC Adv 2017. [DOI: 10.1039/c6ra28232f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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] Open
Abstract
Distribution of trigonal prism capped with three half-octahedra (orange clusters), archimedean anti-prism (green ones) and icosahedron (blue ones) clusters in Pd82Si18 at different temperature (a) 900 K, (b) 1216 K. (c) Connection way of different clusters, and pink ones are the sharing atoms.
Collapse
|
36
|
Abstract
Superposition of the optical spectra of the assemble of Sim@C2nwhich exhibit a broadband optical absorption and the spectrum of solar radiation.
Collapse
Affiliation(s)
- Wen-Hua Yang
- College of Physics and Laboratory of Fiber Materials and Modern Textile
- Growing Base for State Key Laboratory
- Qingdao University
- Qingdao
- P. R. China
| | - Wen-Cai Lu
- College of Physics and Laboratory of Fiber Materials and Modern Textile
- Growing Base for State Key Laboratory
- Qingdao University
- Qingdao
- P. R. China
| | - K. M. Ho
- Ames Laboratory-U.S. DOE
- Department of Physics and Astronomy
- Iowa State University
- Ames
- USA
| | - C. Z. Wang
- Ames Laboratory-U.S. DOE
- Department of Physics and Astronomy
- Iowa State University
- Ames
- USA
| |
Collapse
|
37
|
Zhang Y, Ashcraft R, Mendelev M, Wang CZ, Kelton KF. Experimental and molecular dynamics simulation study of structure of liquid and amorphous Ni62Nb38 alloy. J Chem Phys 2016; 145:204505. [DOI: 10.1063/1.4968212] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Y. Zhang
- Division of Materials Sciences and Engineering, Ames Laboratory, Ames, Iowa 50011, USA
| | - R. Ashcraft
- Department of Physics and Institute of Materials Science & Engineering, Washington University, St. Louis, Missouri 63130, USA
| | - M.I. Mendelev
- Division of Materials Sciences and Engineering, Ames Laboratory, Ames, Iowa 50011, USA
| | - C. Z. Wang
- Division of Materials Sciences and Engineering, Ames Laboratory, Ames, Iowa 50011, USA
| | - K. F. Kelton
- Department of Physics and Institute of Materials Science & Engineering, Washington University, St. Louis, Missouri 63130, USA
| |
Collapse
|
38
|
Liu C, Liu J, Yao YX, Wu P, Wang CZ, Ho KM. Correlation Matrix Renormalization Theory: Improving Accuracy with Two-Electron Density-Matrix Sum Rules. J Chem Theory Comput 2016; 12:4806-4811. [DOI: 10.1021/acs.jctc.6b00570] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- C. Liu
- Ames
Laboratory−US DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, United States
| | - J. Liu
- Ames
Laboratory−US DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, United States
| | - Y. X. Yao
- Ames
Laboratory−US DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, United States
| | - P. Wu
- Hefei
National Laboratory for Physical Sciences at Microscale, International
Center for Quantum Design of Functional Materials (ICQD) and Synergetic
Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - C. Z. Wang
- Ames
Laboratory−US DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, United States
| | - K. M. Ho
- Ames
Laboratory−US DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, United States
- Hefei
National Laboratory for Physical Sciences at Microscale, International
Center for Quantum Design of Functional Materials (ICQD) and Synergetic
Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| |
Collapse
|
39
|
Wang Z, Huang L, Yue GQ, Shen B, Dong F, Zhang RJ, Zheng YX, Wang SY, Wang CZ, Kramer MJ, Ho KM, Chen LY. Effects of Oxygen Impurities on Glass-Formation Ability in Zr2Cu Alloy. J Phys Chem B 2016; 120:9223-9. [PMID: 27509394 DOI: 10.1021/acs.jpcb.6b06306] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Using ab initio molecular dynamics simulations, we show that oxygen (O) impurities have a noticeable influence on the glass-formation ability (GFA) in Zr2Cu alloy. Cu-centered icosahedral clusters and Zr-centered Kasper polyhedra are the dominate short-range orders in undercooled Zr2Cu liquid which are most likely to be responsible for the glass formation in Zr2Cu systems. When O is introduced, a Zr octahedron is formed around the O impurity. Most of the Zr atoms in the octahedron also serve as the bridging atoms for cross-linked Kasper polyhedral network, resulting in an O-centered medium range order (MRO) structure. Meanwhile, Cu atoms are moved away from the first shell of O-centered octahedral clusters. With 1 at. % O impurities, the fractions of Zr-centered clusters are less affected, while the increase of ideal icosahedral order and decrease of distorted icosahedral order lead to a more stable atomic structure. This result suggests that a low concentration of O impurities would improve the GFA in Zr2Cu alloy. However, when ∼5 at. % O impurities are included, the ideal icosahedral clusters and Zr-centered Kasper polyhedra are seriously suppressed by the formation of O-centered MRO, which can lead to deterioration of GFA. Our analyses provide useful insight into glass formation behavior in O-doped metallic alloy systems.
Collapse
Affiliation(s)
- Zhanyu Wang
- Shanghai Ultra-Precision Optical Manufacturing Engineering Center and Department of Optical Science and Engineering, Fudan University , Shanghai 200433, China
| | - Li Huang
- Department of Physics, South University of Science and Technology of China , Shenzhen, Guangdong 518055, China.,Ames Laboratory, U.S. Department of Energy and Department of Physics and Astronomy, Iowa State University , Ames, Iowa 50011, United States
| | - G Q Yue
- Shanghai Ultra-Precision Optical Manufacturing Engineering Center and Department of Optical Science and Engineering, Fudan University , Shanghai 200433, China
| | - B Shen
- Shanghai Ultra-Precision Optical Manufacturing Engineering Center and Department of Optical Science and Engineering, Fudan University , Shanghai 200433, China
| | - F Dong
- Shanghai Ultra-Precision Optical Manufacturing Engineering Center and Department of Optical Science and Engineering, Fudan University , Shanghai 200433, China
| | - R J Zhang
- Shanghai Ultra-Precision Optical Manufacturing Engineering Center and Department of Optical Science and Engineering, Fudan University , Shanghai 200433, China
| | - Y X Zheng
- Shanghai Ultra-Precision Optical Manufacturing Engineering Center and Department of Optical Science and Engineering, Fudan University , Shanghai 200433, China
| | - S Y Wang
- Shanghai Ultra-Precision Optical Manufacturing Engineering Center and Department of Optical Science and Engineering, Fudan University , Shanghai 200433, China.,Ames Laboratory, U.S. Department of Energy and Department of Physics and Astronomy, Iowa State University , Ames, Iowa 50011, United States.,Key Laboratory for Information Science of Electromagnetic Waves (MoE), Shanghai 200433, China
| | - C Z Wang
- Ames Laboratory, U.S. Department of Energy and Department of Physics and Astronomy, Iowa State University , Ames, Iowa 50011, United States
| | - M J Kramer
- Ames Laboratory, U.S. Department of Energy and Department of Physics and Astronomy, Iowa State University , Ames, Iowa 50011, United States
| | - K M Ho
- Ames Laboratory, U.S. Department of Energy and Department of Physics and Astronomy, Iowa State University , Ames, Iowa 50011, United States
| | - L Y Chen
- Shanghai Ultra-Precision Optical Manufacturing Engineering Center and Department of Optical Science and Engineering, Fudan University , Shanghai 200433, China
| |
Collapse
|
40
|
Wang J, Zhou XM, Yang X, Zhao ST, Ma QL, Wang CZ. [A three years longitudinal follow-up study of pulmonary function changes in patients with chronic obstructive pulmonary disease]. Zhonghua Nei Ke Za Zhi 2016; 55:302-6. [PMID: 27030620 DOI: 10.3760/cma.j.issn.0578-1426.2016.04.011] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To investigate the characteristics and the risk factors of pulmonary function in patients with chronic obstructive pulmonary disease (COPD) for a 3 year follow-up. METHODS Subjects diagnosed as COPD were followed up for 3 years in the Management Center of Chronic Respiratory Disease at XINQIAO Hospital from September 2009 to June 2012.This was a retrospective study. Parameters related to respiratory function mainly first second forced expiratory volume (FEV1), COPD assessment test (CAT), 6 minutes walking distance (6MWD) and acute exacerbation were recorded during follow-up. RESULTS Although the majority of patients were treated with drugs such as inhaled corticosteroid combined with long-term bronchial dilatation during the three years, FEV1 decreased progressively. The average annual decline of FEV1 was(31.80±61.99)ml, translating into a mean annual decline of(3.74±6.18)%. However, there were significant differences in changes of FEV1. Approximately, FEV1 in 78.3% (47/60) patients decreased, only 21.7%(13/60) patients kept stable FEV1. There was a correlation between decrease of FEV1, FEV1%predicted and the exacerbation (r=0.298, 0.361, 0.273; P<0.05). Logistic regression showed that the positive bronchodilator reversibility and the initial FEV1 were the independent factors associated with significant changes in FEV1 (respectively, OR=5.54, 95%CI 1.55-19.73; OR=8.28, 95%CI 1.42-48.32). CONCLUSION The changes of pulmonary function in patients with COPD are heterogeneous, although most patients are treated in a standard way. Nearly 80% patients still represent deterioration of pulmonary function. Decline of FEV1 is closely related to the initial pulmonary function and bronchodilator reversibility.
Collapse
Affiliation(s)
- J Wang
- Department of Respiratory Internal Medicine , the Second Affiliated Hospital of Third Military Medical University, Chongqing 400037, China
| | | | | | | | | | | |
Collapse
|
41
|
Zhang W, Lu WC, Zhang HX, Ho KM, Wang CZ. Tight-binding calculation studies of vacancy and adatom defects in graphene. J Phys Condens Matter 2016; 28:115001. [PMID: 26902952 DOI: 10.1088/0953-8984/28/11/115001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Computational studies of complex defects in graphene usually need to deal with a larger number of atoms than the current first-principles methods can handle. Here, we show that a recently developed three-center tight-binding potential for carbon is very efficient for large scale atomistic simulations and can accurately describe the structures and energies of various defects in graphene. Using the three-center tight-binding potential, we have systematically studied the stable structures and formation energies of vacancy and embedded-atom defects of various sizes up to four vacancies and four embedded atoms in graphene. Our calculations reveal low-energy defect structures and provide a more comprehensive understanding of the structures and stability of defects in graphene.
Collapse
Affiliation(s)
- Wei Zhang
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry and Institute of Theoretical Chemistry, Jilin University, Changchun, Jilin 130023, People's Republic of China. Ames Laboratory-U.S. DOE and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA
| | | | | | | | | |
Collapse
|
42
|
Huang Y, Huang L, Wang CZ, Kramer MJ, Ho KM. Ab initio molecular dynamics simulations of short-range order in Zr₅₀Cu₄₅Al₅ and Cu₅₀Zr₄₅Al₅ metallic glasses. J Phys Condens Matter 2016; 28:085102. [PMID: 26828778 DOI: 10.1088/0953-8984/28/8/085102] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Comparative analysis between Zr-rich Zr50Cu45Al5 and Cu-rich Cu50Zr45Al5 metallic glasses (MGs) is extensively performed to locate the key structural motifs accounting for their difference of glass forming ability. Here we adopt ab initio molecular dynamics simulations to investigate the local atomic structures of Zr50Cu45Al5 and Cu50Zr45Al5 MGs. A high content of icosahedral-related (full and distorted) orders was found in both samples, while in the Zr-rich MG full icosahedrons ⟨0, 0, 12, 0⟩ is dominant, and in the Cu-rich one the distorted icosahedral orders, especially ⟨0, 2, 8, 2⟩ and ⟨0, 2, 8, 1⟩, are prominent. And the ⟨0, 2, 8, 2⟩ polyhedra in Cu50Zr45Al5 MG mainly originate from Al-centered clusters, while the ⟨0, 0, 12, 0⟩ in Zr50Cu45Al5 derives from both Cu-centered clusters and Al-centered clusters. These difference may be ascribed to the atomic size difference and chemical property between Cu and Zr atoms. The relatively large size of Zr and large negative heat of mixing between Zr and Al atoms, enhancing the packing density and stability of metallic glass system, may be responsible for the higher glass forming ability of Zr50Cu45Al5.
Collapse
Affiliation(s)
- Yuxiang Huang
- Department of Physics, South University of Science and Technology of China, Shenzhen, Guangdong 518055, People's Republic of China
| | | | | | | | | |
Collapse
|
43
|
Wang CZ, Feng GX, Zhang B, Zhou H, Shu JH, Gan XY, Lin RY, Chen HH. [Effect of blastocyst quality on the strategy of single blastocyst transfer in frozen-thawed cycles]. Zhonghua Fu Chan Ke Za Zhi 2016; 51:109-13. [PMID: 26917479 DOI: 10.3760/cma.j.issn.0529-567x.2016.02.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To investigate the effect of blastocyst quality on the strategy of single blastocyst transfer in frozen-thawed cycles. METHODS A retrospective analysis was performed in Reproductive Medicine Center, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region on clinical data of single frozen-thawed blastocyst transfer cycles from January 2008 to December 2013. All cycles were divided into four groups (AA, AB/BA, BB, BC/CB) according to the blastocyst score, then the clinical outcomes were compared between groups. And on this basis, the clinical outcomes were further explored when the group of outcomes with single blastocyst transfer wasn't ideal, which would diverted to transfer two blastocyst. RESULTS In single frozen blastocyst transfer cycles, the clinical pregnancy rate of each group with the blastocyst scored AA, AB/BA, BB, BC/CB were 61.4% (470/765), 51.2% (330/645), 40.5% (407/1 005), 22.9% (60/262), live births rate in each group were 52.2% (399/765), 41.2% (266/645), 30.4% (306/1 005), 13.7% (36/262), and the abortion rate were 13.6% (64/470), 16.7% (55/330), 21.4% (87/407), 35.0%(21/60), separately. This showed that the clinical pregnancy rate and live births rate decreased significantly with the decline of blastocyst quality (P<0.01), but the abortion rate showed significant upward trend (P<0.01). When single blastocyst scored ≥BB grade transferred, an acceptable clinical pregnancy rate (>40%) and live births rate (>30%) could be obtained, however, the clinical pregnancy rate of 22.9% and live births rate of 13.7% could only be acquired when blastocyst scored BC/CB only transferred one embryo, which significant lower than those of each group scored ≥BB grade (P<0.01). So, after that, the blastocyst scored BC/CB were further divided into two groups (single blastocyst transferred versus two blastocyst transferred) to investigate, then the result showed that the clinical pregnancy rate [22.9% versus 38.5%(67/174),P<0.01] and live births rate [13.7% versus 30.5%(16/67),P<0.01] were significantly increased in the group of two blastocyst transferred compared with the group of one blastocyst transferred, and the abortion rate was also significantly decreased from 35.0% to 17.9% (12/67;P<0.05). So when two blastocyst scored BC/CB were transferred, the clinical outcomes were similar to the group of one blastocyst scored BB transferred (P>0.05). CONCLUSIONS Of single blastocyst transfer in frozen-thawed cycles, the clinical pregnancy rate and liver births rate showed significant upward trend, but the abortion rate showed significant downward trend, with the decline of blastocyst quality. When the blastocyst scored ≥BB grade, the single blastocyst transfer could be considered to be performed.
Collapse
Affiliation(s)
- C Z Wang
- Reproductive Medicine Center, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning 530003, China
| | | | | | | | | | | | | | | |
Collapse
|
44
|
Yuan P, Yuan L, Xu BL, Wang CZ, Yang HZ, Li Y. Predictive potential role of glutathione S-transferases polymorphisms in response to chemotherapy and breast cancer prognosis. Genet Mol Res 2015; 14:16675-81. [PMID: 26681014 DOI: 10.4238/2015.december.11.15] [Citation(s) in RCA: 6] [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] [Indexed: 11/03/2022]
Abstract
The aim of this study was to evaluate the role of GSTM1 null/present, GSTT1 null/present, and GSTP1 polymorphisms in the clinical response to chemotherapy and treatment outcome of breast cancer. The GSTM1, GSTT1, and GSTP1 IIe105Val polymorphism genotypes were analyzed using polymerase chain reaction coupled with restriction fragment length polymorphism. Conditional logistic regression analysis revealed that breast cancer patients carrying the GG genotype of GSTP1 IIe105Val showed a significantly better response to chemotherapy compared to those expressing the AA genotype [odds ratio = 2.66, 95% confidence interval (CI) = 1.24-5.91, P = 0.007]. The Cox proportional hazards model indicated that the GG genotype of GSTP1 IIe105Val in breast cancer patients was correlated with a lower risk of death from all causes than those with AA genotype. The adjusted hazard ratio (95%CI) for the GG genotype of GSTP1 IIe105Val was 0.44 (0.18-0.99; P = 0.03). In conclusion, the results of our study indicated that the GG genotype of GSTP1 IIe105Val was significantly associated with better response to chemotherapy and longer overall survival, compared to the wide-type genotype.
Collapse
Affiliation(s)
- P Yuan
- Breast Cancer Center, The Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou, China
| | - L Yuan
- Department of Surgery, The Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou, China
| | - B L Xu
- Central Laboratory, The Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou, China
| | - C Z Wang
- Breast Cancer Center, The Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou, China
| | - H Z Yang
- Breast Cancer Center, The Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou, China
| | - Y Li
- Department of Thoracic Surgery, The Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou, China
| |
Collapse
|
45
|
Shen B, Wang ZY, Dong F, Guo YR, Zhang RJ, Zheng YX, Wang SY, Wang CZ, Ho KM, Chen LY. Dynamics and Diffusion Mechanism of Low-Density Liquid Silicon. J Phys Chem B 2015; 119:14945-51. [PMID: 26540341 DOI: 10.1021/acs.jpcb.5b09138] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A first-order phase transition from a high-density liquid to a low-density liquid has been proposed to explain the various thermodynamic anomies of water. It also has been proposed that such liquid-liquid phase transition would exist in supercooled silicon. Computer simulation studies show that, across the transition, the diffusivity drops roughly 2 orders of magnitude, and the structures exhibit considerable tetrahedral ordering. The resulting phase is a highly viscous, low-density liquid silicon. Investigations on the atomic diffusion of such a novel form of liquid silicon are of high interest. Here we report such diffusion results from molecular dynamics simulations using the classical Stillinger-Weber (SW) potential of silicon. We show that the atomic diffusion of the low-density liquid is highly correlated with local tetrahedral geometries. We also show that atoms diffuse through hopping processes within short ranges, which gradually accumulate to an overall random motion for long ranges as in normal liquids. There is a close relationship between dynamical heterogeneity and hopping process. We point out that the above diffusion mechanism is closely related to the strong directional bonding nature of the distorted tetrahedral network. Our work offers new insights into the complex behavior of the highly viscous low density liquid silicon, suggesting similar diffusion behaviors in other tetrahedral coordinated liquids that exhibit liquid-liquid phase transition such as carbon and germanium.
Collapse
Affiliation(s)
- B Shen
- Key Laboratory of Micro and Nano Photonic Structures (MoE) and Department of Optical Science and Engineering, Fudan University , Shanghai, 200433, China.,Ames Laboratory, U.S. Department of Energy and Department of Physics and Astronomy, Iowa State University , Ames, Iowa 50011, United States
| | - Z Y Wang
- Key Laboratory of Micro and Nano Photonic Structures (MoE) and Department of Optical Science and Engineering, Fudan University , Shanghai, 200433, China
| | - F Dong
- Key Laboratory of Micro and Nano Photonic Structures (MoE) and Department of Optical Science and Engineering, Fudan University , Shanghai, 200433, China
| | - Y R Guo
- Key Laboratory of Micro and Nano Photonic Structures (MoE) and Department of Optical Science and Engineering, Fudan University , Shanghai, 200433, China
| | - R J Zhang
- Key Laboratory of Micro and Nano Photonic Structures (MoE) and Department of Optical Science and Engineering, Fudan University , Shanghai, 200433, China
| | - Y X Zheng
- Key Laboratory of Micro and Nano Photonic Structures (MoE) and Department of Optical Science and Engineering, Fudan University , Shanghai, 200433, China
| | - S Y Wang
- Key Laboratory of Micro and Nano Photonic Structures (MoE) and Department of Optical Science and Engineering, Fudan University , Shanghai, 200433, China.,Ames Laboratory, U.S. Department of Energy and Department of Physics and Astronomy, Iowa State University , Ames, Iowa 50011, United States.,Key Laboratory for Information Science of Electromagnetic Waves (MoE) , Shanghai, 200433, China
| | - C Z Wang
- Ames Laboratory, U.S. Department of Energy and Department of Physics and Astronomy, Iowa State University , Ames, Iowa 50011, United States
| | - K M Ho
- Ames Laboratory, U.S. Department of Energy and Department of Physics and Astronomy, Iowa State University , Ames, Iowa 50011, United States
| | - L Y Chen
- Key Laboratory of Micro and Nano Photonic Structures (MoE) and Department of Optical Science and Engineering, Fudan University , Shanghai, 200433, China
| |
Collapse
|
46
|
Abstract
We performed first-principles calculations to study the structural stability of Si78 clusters with or without hydrogen passivation. The calculations reveal that an endohedral double cage isomer is more stable than the diamond-like structure, whereas the opposite is found for the hydrogen passivated isomers. In particular, the hydrogenated double cage and diamond-like structure may display blue shifts to the visible and UV regions, respectively. The IR vibration spectra, ionization potential (IP) and electronic density-of-states of the clusters were calculated and discussed.
Collapse
Affiliation(s)
- Li-Zhen Zhao
- College of Physics and Laboratory of Fiber Materials and Modern Textile, the Growing Base for State Key Laboratory, Qingdao University, Qingdao, Shandong 266071, P. R. China.
| | | | | | | | | | | |
Collapse
|
47
|
Qin W, Lu WC, Xia LH, Zhao LZ, Zang QJ, Wang CZ, Ho KM. Theoretical study on the structures and optical absorption of Si₁₇₂ nanoclusters. Nanoscale 2015; 7:14444-14451. [PMID: 26252942 DOI: 10.1039/c5nr03408f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The structures and optical properties of silicon nanoclusters (Si NCs) have attracted continuous interest in the last few decades. However, it is a great challenge to determine the structures of Si NCs for accurate property calculation due to the complication and competition of various structural motifs. In this work, a Si172 NC with a size of about 1.8 nm was investigated using a genetic algorithm combined with tight-binding and DFT calculations. We found that a diamond crystalline core with 50 atoms (1.2 nm) was formed in the Si172 NC. It can be expected that at a size of about 172 atoms, a diamond crystalline structure can nucleate from the center of the Si NCs. The optical properties of the pure and hydrogenated Si172 NC structures also have been studied using the TDDFT method. Compared with the pure Si172 NC, the absorption peaks of the hydrogenated Si172 NC are obviously blue-shifted.
Collapse
Affiliation(s)
- Wei Qin
- Laboratory of Fiber Materials and Modern Textile, the Growing Base for State Key Laboratory, College of Physics, Qingdao University, Qingdao, Shandong 266071, P. R. China.
| | | | | | | | | | | | | |
Collapse
|
48
|
Yao YX, Liu J, Liu C, Lu WC, Wang CZ, Ho KM. Efficient and accurate treatment of electron correlations with Correlation Matrix Renormalization theory. Sci Rep 2015; 5:13478. [PMID: 26315767 PMCID: PMC4551991 DOI: 10.1038/srep13478] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [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: 10/09/2014] [Accepted: 07/14/2015] [Indexed: 11/09/2022] Open
Abstract
We present an efficient method for calculating the electronic structure and total energy of strongly correlated electron systems. The method extends the traditional Gutzwiller approximation for one-particle operators to the evaluation of the expectation values of two particle operators in the many-electron Hamiltonian. The method is free of adjustable Coulomb parameters, and has no double counting issues in the calculation of total energy, and has the correct atomic limit. We demonstrate that the method describes well the bonding and dissociation behaviors of the hydrogen and nitrogen clusters, as well as the ammonia composed of hydrogen and nitrogen atoms. We also show that the method can satisfactorily tackle great challenging problems faced by the density functional theory recently discussed in the literature. The computational workload of our method is similar to the Hartree-Fock approach while the results are comparable to high-level quantum chemistry calculations.
Collapse
Affiliation(s)
- Y. X. Yao
- Ames Laboratory–US DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
| | - J. Liu
- Ames Laboratory–US DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
| | - C. Liu
- Ames Laboratory–US DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
| | - W. C. Lu
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun, Jilin 130021, China
- College of Physical Science and Laboratory of Fiber Materials and Modern Textile, Growing Base for State Key Laboratory, Qingdao University, Qingdao, Shandong 266071, China
| | - C. Z. Wang
- Ames Laboratory–US DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
| | - K. M. Ho
- Ames Laboratory–US DOE and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
| |
Collapse
|
49
|
Bian XL, Wang CZ, Wang Y, Li YN, Zhang LZ, Liu L. Analysis of postoperative PSA changes after ultrasound-guided permanent [125I] seed implantation for the treatment of prostate cancer. Genet Mol Res 2015; 14:7142-50. [PMID: 26125925 DOI: 10.4238/2015.june.29.8] [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: 11/03/2022]
Abstract
The aim of this study was to explore postoperative changes in prostate-specific antigen (PSA) levels and risk factors that influence the clinical effects of ultrasound-guided permanent [(125)I] seed implantation in the treatment of prostate cancer. From July 2009 to December 2012, 41 prostate cancer patients who underwent transrectal ultrasound-guided [(125)I] seed implantation were followed up for 3-56 months. The patients were divided into 2 groups according to their results: group A, benign rebound group, 31 cases; and group B, biochemical relapse group, 10 cases. A blood analysis of group A showed that the initial PSA rise after a nadir occurred postoperatively at 16.8 ± 1.2 months, and in 65.8% (27/41) patients the rise occurred during 15-27 weeks. For group B, the initial PSA rise after a nadir occurred postoperatively at 30.2 ± 2.1 months, and the difference in the time parameter of the initial PSA rise after the nadir was statistically significant between the 2 groups (P < 0.01). During treatment, age was shown to be a risk factor for group A (P = 0.0027, P < 0.01). Postoperative changes in PSA levels after ultrasound-guided permanent [(125)I] seed implantation contributed to the assessment of the clinical treatment effects.
Collapse
Affiliation(s)
- X L Bian
- Department of Ultrasound, The Affiliated Tumor Hospital of Zhengzhou University, Zhengzhou, China
| | - C Z Wang
- Department of Ultrasound, The Affiliated Tumor Hospital of Zhengzhou University, Zhengzhou, China
| | - Y Wang
- Department of Ultrasound, The Affiliated Tumor Hospital of Zhengzhou University, Zhengzhou, China
| | - Y N Li
- Department of Cardiovascular Ultrasound, Henan Province People's Hospital, Zhengzhou, China
| | - L Z Zhang
- Department of Cardiovascular Ultrasound, Henan Province People's Hospital, Zhengzhou, China
| | - L Liu
- Department of Cardiovascular Ultrasound, Henan Province People's Hospital, Zhengzhou, China
| |
Collapse
|
50
|
Wang T, Zhang F, Yang L, Fang XW, Zhou SH, Kramer MJ, Wang CZ, Ho KM, Napolitano RE. A computational study of diffusion in a glass-forming metallic liquid. Sci Rep 2015; 5:10956. [PMID: 26055394 PMCID: PMC4460728 DOI: 10.1038/srep10956] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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: 03/24/2015] [Accepted: 05/01/2015] [Indexed: 11/24/2022] Open
Abstract
Liquid phase diffusion plays a critical role in phase transformations (e.g. glass transformation and devitrification) observed in marginal glass forming systems such as Al-Sm. Controlling transformation pathways in such cases requires a comprehensive description of diffusivity, including the associated composition and temperature dependencies. In the computational study reported here, we examine atomic diffusion in Al-Sm liquids using ab initio molecular dynamics (AIMD) and determine the diffusivities of Al and Sm for selected alloy compositions. Non-Arrhenius diffusion behavior is observed in the undercooled liquids with an enhanced local structural ordering. Through assessment of our AIMD result, we construct a general formulation for Al-Sm liquid, involving a diffusion mobility database that includes composition and temperature dependence. A Volmer-Fulcher-Tammann (VFT) equation is adopted for describing the non-Arrhenius behavior observed in the undercooled liquid. The composition dependence of diffusivity is found quite strong, even for the Al-rich region contrary to the sole previous report on this binary system. The model is used in combination with the available thermodynamic database to predict specific diffusivities and compares well with reported experimental data for 0.6 at.% and 5.6 at.% Sm in Al-Sm alloys.
Collapse
Affiliation(s)
- T. Wang
- Division of Materials Sciences and Engineering, Ames Laboratory, US DOE, Ames, IA 50011, USA
| | - F. Zhang
- Division of Materials Sciences and Engineering, Ames Laboratory, US DOE, Ames, IA 50011, USA
| | - L. Yang
- Division of Materials Sciences and Engineering, Ames Laboratory, US DOE, Ames, IA 50011, USA
| | - X. W. Fang
- Kuang-Chi Institute of Advanced Technology, Shenzhen, Guangdong 518000, China
| | - S. H. Zhou
- Division of Materials Sciences and Engineering, Ames Laboratory, US DOE, Ames, IA 50011, USA
| | - M. J. Kramer
- Division of Materials Sciences and Engineering, Ames Laboratory, US DOE, Ames, IA 50011, USA
- Department of Materials Science and Engineering, Iowa State University, Ames, IA 50011, USA
| | - C. Z. Wang
- Division of Materials Sciences and Engineering, Ames Laboratory, US DOE, Ames, IA 50011, USA
| | - K. M. Ho
- Division of Materials Sciences and Engineering, Ames Laboratory, US DOE, Ames, IA 50011, USA
- Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA
| | - R. E. Napolitano
- Division of Materials Sciences and Engineering, Ames Laboratory, US DOE, Ames, IA 50011, USA
- Department of Materials Science and Engineering, Iowa State University, Ames, IA 50011, USA
| |
Collapse
|