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Zhang N, Yue Q, Yang L, Song WH, Wang X, Wu SL, Liu T. [Associations between risk factor control and survival among cancer patients]. Zhonghua Yi Xue Za Zhi 2023; 103:3402-3409. [PMID: 37963738 DOI: 10.3760/cma.j.cn112137-20230905-00397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
Objective: This study aimed to evaluate the associations between the number of cardiovascular risk factor goals achieved with all-cause mortality, atherosclerotic cardiovascular diseases (ASCVD)-related mortality, and cancer-related mortality amongst cancer patients. Methods: From 2006 to 2020, a total of 2 079 individuals with newly diagnosed cancer, free of ASCVD, were enrolled in this study from the Kailuan cohort. Patients were classified into three groups (group 1,≤1 risk factor at goal, n=407; group 2, 2 risk factors at goal, n=865; group 3,≥3 risk factors at goal, n=807) according to the control status of blood pressure, fasting blood glucose, low-density lipoprotein cholesterol and high-sensitivity C-reactive protein, using health checkup results of the latest survey after cancer diagnosis. Multivariable Cox regression analyses were performed to examine the associations between the number of risk factors at goals with all-cause mortality, ASCVD-related mortality, and cancer-related mortality. Results: The mean age at diagnosis was (60.4±10.4) years, and 71.2% were male. During a median follow-up of 2.95 (1.38, 5.12) years, 600 cases of all-cause mortality, 63 cases of ASCVD-related mortality, and 314 cases of cancer-related mortality were observed. After adjusting for age, gender, education level, smoking status, alcohol consumption, salt intake, physical activity, body mass index, triglyceride, high-density lipoprotein cholesterol, family history of cardiovascular diseases, antihypertensive drugs, hypoglycemic drugs, lipid-lowering drugs, and anti-cancer medications, compared with cancer patients achieving ≤1 risk factor goal, those achieving ≥3 risk factor goals showed significantly decreased risk of all-cause mortality, ASCVD mortality, and cancer mortality, with HR (95%CI) of 0.68 (0.54-0.86), 0.35 (0.16-0.77), and 0.60 (0.43-0.82), respectively (all P values <0.05). Significant relationships between the number of risk factor goals achieved and decreased mortality of all kinds were observed (all P values for trend<0.05). Results of the subgroup analyses suggested that the associations between the number of risk factor goals achieved and lower mortality of all kinds were more prominent among individuals who were ≥60 years, male, and those with respiratory and reproductive cancers (all P values <0.05). Conclusions: This study suggested a significant association between the number of cardiovascular risk factor goals achieved and survival in cancer patients, especially amongst those who were older, male, with respiratory cancers and reproductive cancers.
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Affiliation(s)
- N Zhang
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin 300211, China
| | - Q Yue
- Department of Preventive Medicine, School of Public Health, North China University of Science and Technology, Tangshan 063210, China
| | - L Yang
- Department of Preventive Medicine, School of Public Health, North China University of Science and Technology, Tangshan 063210, China
| | - W H Song
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin 300211, China
| | - X Wang
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin 300211, China
| | - S L Wu
- Department of Cardiology, Kailuan Hospital, North China University of Science and Technology, Tangshan 063001, China
| | - T Liu
- Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin 300211, China
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Cui KY, Yin D, Feng L, Zhu CG, Song WH, Wang HJ, Jia L, Zhang D, Yuan S, Wu SY, He JN, Qiao Z, Dou KF. [Benefits and risks of prolonged dual antiplatelet therapy after percutaneous coronary intervention with drug-eluting stent in patients with stable coronary artery disease and diabetes]. Zhonghua Xin Xue Guan Bing Za Zhi 2022; 50:458-465. [PMID: 35589594 DOI: 10.3760/cma.j.cn112148-20220114-00034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To compare the efficacy and safety of prolonged dual antiplatelet therapy (DAPT>1 year) in patients with stable coronary artery disease (CAD) and diabetes who were event-free at 1 year after percutaneous coronary intervention (PCI) with drug-eluting stent (DES) in a large and contemporary PCI registry. Methods: A total of 1 661 eligible patients were selected from the Fuwai PCI Registry, of which 1 193 received DAPT>1 year and 468 received DAPT ≤1 year. The primary endpoint was major adverse cardiac and cerebrovascular event (MACCE) and Bleeding Academic Research Consortium (BARC) type 2, 3 or 5 bleeding, MACCE was defined as a composite of all-cause death, myocardial infarction or stroke. Multivariate Cox regression analysis and inverse probability of treatment weighting (IPTW) Cox regression analysis were performed. Results: After a median follow-up of 2.5 years, patients who received DAPT>1 year were associated with lower risks of MACCE (1.4% vs. 3.2%; hazard ratio (HR) 0.412, 95% confidence interval (CI) 0.205-0.827) compared with DAPT ≤1 year, which was primarily caused by the lower all-cause mortality (0.1% vs. 2.6%; HR 0.031, 95%CI 0.004-0.236). Risks of cardiac death (0.1% vs. 1.5%; HR 0.051, 95%CI 0.006-0.416) and definite/probable ST (0.3% vs. 1.1%; HR 0.218, 95%CI 0.052-0.917) were also lower in patients received DAPT>1 year than those received DAPT ≤ 1 year. No difference was found between the two groups in terms of BARC type 2, 3, or 5 bleeding (5.3% vs. 4.1%; HR 1.088, 95%CI 0.650-1.821). Conclusions: In patients with stable CAD and diabetes who were event-free at 1 year after PCI with DES, prolonged DAPT (>1 year) provides a substantial reduction in ischemic cardiovascular events, including MACCE, all-cause mortality, cardiac mortality, and definite/probable ST, without increasing the clinically relevant bleeding risk compared with ≤ 1-year DAPT. Further well-designed, large-scale randomized trials are needed to verify the beneficial effect of prolonged DAPT in this population.
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Affiliation(s)
- K Y Cui
- Cardiometabolic Medicine Center, Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - D Yin
- Cardiometabolic Medicine Center, Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - L Feng
- Cardiometabolic Medicine Center, Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - C G Zhu
- Cardiometabolic Medicine Center, Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - W H Song
- Cardiometabolic Medicine Center, Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - H J Wang
- Cardiometabolic Medicine Center, Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - L Jia
- Cardiometabolic Medicine Center, Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - D Zhang
- Cardiometabolic Medicine Center, Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - S Yuan
- Cardiometabolic Medicine Center, Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - S Y Wu
- Cardiometabolic Medicine Center, Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - J N He
- Cardiometabolic Medicine Center, Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - Z Qiao
- Cardiometabolic Medicine Center, Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - K F Dou
- Cardiometabolic Medicine Center, Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
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Georgi M, Ataide-Da Costa M, Saberi SEM, Wu L, Ma H, Darbyshire A, Sciscione F, Hamilton G, Song WH. 1286 3D Printing of Aortic Valve Scaffolds for Heart Valve Regeneration. Br J Surg 2021. [DOI: 10.1093/bjs/znab258.018] [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: 11/13/2022]
Abstract
Abstract
Introduction
Valvular heart disease (VHD) has been commonly described as the forgotten epidemic, with an estimated global prevalence of 2.5%. Current heart valve replacement therapies only partially offer a solution to the problem. In recent years, synthetic polymers have been explored due to their diversity allowing tailor-picking of essential traits, such as chemical properties, physical properties, and degradation states. This project investigated the feasibility and mechanical properties of reverse three-dimensional printing of biodegradable scaffolds for heart valve regeneration.
Method
Aortic valve dimensions at an average of 100mmHg were used for the computer aided design of the valves. Aortic valve scaffolds were fabricated using the 3D-TIPs reverse printing technique. Infill densities of 30%, 40% or 50% were used. Printed polymer scaffolds were coated in gelatine solution and compared using static tensile tests. Static strength and elasticity of coated and uncoated valves were compared.
Results
At 25%, 50% and 100% strain, significantly different elastic properties in favour of coated scaffolds between coated and uncoated valves was observed. Coated valves displayed greater strength than uncoated valves (p > 0.05). Computer aided design (CAD) software designed anatomically accurate scaffolds, but poor polymer coagulation was observed on the valve cusps.
Conclusions
The reverse-printing 3D-TIPS procedure successfully produces heart valve scaffolds which present architectural similarities to the naïve mitral valve, however, dimensions of the valves ought to be reassessed. Gelatine-coated valves exhibit greater elastic and tensile properties. A further understanding of cellular interactions on the polymer scaffold, in particular in vivo studies, are required for the continuity of future study.
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Affiliation(s)
- M Georgi
- University College London Medical School, London, United Kingdom
- Centre for Biomaterials in Surgical Reconstruction and Regeneration, Division of Surgery & Interventional Science, University College London, London, United Kingdom
| | | | - S E M Saberi
- Centre for Biomaterials in Surgical Reconstruction and Regeneration, Division of Surgery & Interventional Science, University College London, London, United Kingdom
| | - L Wu
- Centre for Biomaterials in Surgical Reconstruction and Regeneration, Division of Surgery & Interventional Science, University College London, London, United Kingdom
| | - H Ma
- Centre for Biomaterials in Surgical Reconstruction and Regeneration, Division of Surgery & Interventional Science, University College London, London, United Kingdom
| | - A Darbyshire
- Centre for Biomaterials in Surgical Reconstruction and Regeneration, Division of Surgery & Interventional Science, University College London, London, United Kingdom
| | - F Sciscione
- Centre for Biomaterials in Surgical Reconstruction and Regeneration, Division of Surgery & Interventional Science, University College London, London, United Kingdom
| | - G Hamilton
- Centre for Biomaterials in Surgical Reconstruction and Regeneration, Division of Surgery & Interventional Science, University College London, London, United Kingdom
| | - W H Song
- Centre for Biomaterials in Surgical Reconstruction and Regeneration, Division of Surgery & Interventional Science, University College London, London, United Kingdom
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Shi BQ, Liu X, Cai ZX, Song CX, Wang HJ, Yin D, Dou KF, Song WH. [Research advances of left ventricnlar thrombus formation and management after acute myocardial infarction]. Zhonghua Xin Xue Guan Bing Za Zhi 2021; 49:839-844. [PMID: 34404199 DOI: 10.3760/cma.j.cn112148-20201207-00968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- B Q Shi
- Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases of China, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - X Liu
- Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases of China, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - Z X Cai
- Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases of China, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - C X Song
- Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases of China, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - H J Wang
- Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases of China, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - D Yin
- Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases of China, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - K F Dou
- Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases of China, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - W H Song
- Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases of China, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
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Wang HY, Cai ZX, Yin D, Song WH, Feng L, Gao RL, Yang YJ, Dou KF. Optimal strategy for antiplatelet therapy after coronary drug-eluting stent implantation in high-risk "TWILIGHT-like" patients with diabetes mellitus. Eur J Prev Cardiol 2021. [DOI: 10.1093/eurjpc/zwab061.306] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: Foundation. Main funding source(s): Chinese College of Cardiovascular Physicians, CS Optimizing Antithrombotic Research Fund (Grant No. BJUHFCSOARF201801-01), the National Key Research and Development Program of China (Grant No. 2018YFC1315602), the Beijing Municipal Health Commission (Grant No. 2020-1-4032), the Chinese Academy of Medical Sciences Innovation Fund for Medical Sciences (Grant No. 2016-I2M-1-009), and the National Natural Science Foundation of China (Grant No. 81870277).
Background
Patients with diabetes mellitus (DM) are known to be at high-risk for both ischemic and bleeding complications post-percutaneous coronary intervention (PCI). The ischemic benefit versus bleeding risk associated with extended dual antiplatelet therapy (DAPT) in high-risk "TWILIGHT-like" patients with diabetes mellitus after PCI has not been established.
Methods
All consecutive high-risk patients fulfilling the "TWILIGHT-like" criteria undergoing PCI from January 2013 through December 2013 were identified from prospective Fuwai PCI Registry. High-risk "TWILIGHT-like" patients were defined by at least 1 clinical and 1 angiographic feature based on TWILIGHT trial selection criteria. The present analysis evaluated 3425 diabetics patients with concomitant high-risk angiographic features who were event-free at 1 year after PCI. Median follow-up was 2.4 years. The primary effectiveness endpoint was a composite of death, myocardial infarction, or stroke (termed major adverse cardiac and cerebrovascular events) and primary safety endpoint was clinically relevant bleeding according to Bleeding Academic Research Consortium type 2, 3, or 5.
Results
On inverse probability of treatment weighting (IPTW) analysis, prolonged-term (>1-year) DAPT with aspirin and clopidogrel decreased the risk of primary effectiveness endpoint compared with shorter (≤1-year) DAPT (1.8% vs. 4.3%; hazard ratio [HR]IPTW: 0.381; 95% confidence interval [CI]: 0.252-0.576; P < 0.001) and reduced cardiovascular death (0.1% vs. 1.8%; HRIPTW: 0.056 [0.016-0.193]). Prolonged DAPT was also associated with a reduced risk of definite/probable stent thrombosis (0.2% vs. 0.7%; HRIPTW: 0.258 [0.083-0.802]), and non-significantly lower rate of myocardial infarction (0.5% vs. 0.8%; HRIPTW: 0.676 [0.275-1.661]). There was no significant difference between groups in clinically relevant bleeding (1.1% vs. 1.1%; HRIPTW: 1.078 [0.519-2.241]; P = 0.840). Similar results were observed in multivariable Cox proportional hazards regression model.
Conclusion
Among high-risk PCI patients with diabetes mellitus without an adverse event through 1 year, extending DAPT > 1-year significantly reduced the risk of major adverse cardiac and cerebrovascular events without an increase in clinically relevant bleeding, suggesting that such high-risk diabetic patients may be good candidates for long-term DAPT.
Abstract Figure.
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Affiliation(s)
- HY Wang
- Fuwai Hospital, CAMS and PUMC, Department of Cardiology, Coronary Heart Center, Beijing, China
| | - ZX Cai
- Fuwai Hospital, CAMS and PUMC, Department of Cardiology, Coronary Heart Center, Beijing, China
| | - D Yin
- Fuwai Hospital, CAMS and PUMC, Department of Cardiology, Coronary Heart Center, Beijing, China
| | - WH Song
- Fuwai Hospital, CAMS and PUMC, Department of Cardiology, Coronary Heart Center, Beijing, China
| | - L Feng
- Fuwai Hospital, CAMS and PUMC, Department of Cardiology, Coronary Heart Center, Beijing, China
| | - RL Gao
- Fuwai Hospital, CAMS and PUMC, Department of Cardiology, Coronary Heart Center, Beijing, China
| | - YJ Yang
- Fuwai Hospital, CAMS and PUMC, Department of Cardiology, Coronary Heart Center, Beijing, China
| | - KF Dou
- Fuwai Hospital, CAMS and PUMC, Department of Cardiology, Coronary Heart Center, Beijing, China
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Srivastava A, Long E, Wu L, Song WH. 203 Developing and Fine-Tuning Novel 3D-Printed Biodegradable Scaffolds to Promote Auricular Cartilaginous Regeneration for Surgical Implantation. Br J Surg 2021. [DOI: 10.1093/bjs/znab135.048] [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: 11/15/2022]
Abstract
Abstract
Introduction
Microtia, a congenital cartilaginous defect, poses major challenges in cosmetic surgery. Biodegradable polymers promote chondrogenesis, with promises of seeding cells into synthetic-polymer-implants for surgical fixation. However, existing polymers used in auricular reconstruction present limitations including inflammation, fibrosis, and extrusion. This study aimed to modulate the mechanical properties of the novel polylactic-acid/polyhydroxyalkanoate (PLA/PHA) blend by 3D-printing and hence, evaluate its suitability to the auricular microenvironment in developing next-generation reconstructs.
Method
Digitally defined PLA/PHA scaffolds were free-form 3D-printed at various infill densities and thicknesses. Through tensile testing, tensile moduli, yield point, maximum strength, tensile toughness, and stiffness were calculated, alongside Finite Element Analysis (FEA) and contact angle tests. Finally, preliminary cell seeding was conducted.
Results
Increasing infill densities of PLA/PHA scaffolds from 30%-60% significantly increased tensile moduli, yield point and maximum strength (P < 0.01). Tensile stiffness increased significantly with scaffold thicknesses between 1mm-2mm (P < 0.05). Cell studies showed promising proliferative activity.
Conclusions
The mechanical properties and structural stiffness of 3D-printed PLA/PHA scaffolds can be significantly tailored by altering infill density and thickness, respectively. The digitally defined interconnected pores within printed PLA/PHA scaffolds reduce stiffness mismatches between surgical-synthetic polymers and auricular cartilage, potentially promoting cell migration and nutrition transportation in future reconstructs.
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Affiliation(s)
- A Srivastava
- Centre for Biomaterials in Surgical Reconstruction and Regeneration, Division of Surgery and Interventional Sciences, Royal Free Campus, University College London (UCL), London, United Kingdom
| | - E Long
- Centre for Biomaterials in Surgical Reconstruction and Regeneration, Division of Surgery and Interventional Sciences, Royal Free Campus, University College London (UCL), London, United Kingdom
| | - L Wu
- Centre for Biomaterials in Surgical Reconstruction and Regeneration, Division of Surgery and Interventional Sciences, Royal Free Campus, University College London (UCL), London, United Kingdom
| | - W H Song
- Centre for Biomaterials in Surgical Reconstruction and Regeneration, Division of Surgery and Interventional Sciences, Royal Free Campus, University College London (UCL), London, United Kingdom
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Song WH, Liu A, Zhu YF, Wang SY, Yang XH, Ma LN. Effects of butylphthalide on cognitive dysfunction and expression of superoxide dismutase and Smac in cortex of rats with chronic cerebral ischemia. J BIOL REG HOMEOS AG 2020; 34:2121-2126. [PMID: 33198448 DOI: 10.23812/20-305-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Affiliation(s)
- W H Song
- Department of Psychiatry, Ji'nan City Yingcheng Rongjun Hospital, Jinan, China
| | - A Liu
- Department of Pharmacy, Zhangqiu Maternity and Child Care Hospital, Jinan, China
| | - Y F Zhu
- Department of Anesthesiology, Qingdao Central Hospital, Qingdao University, Qingdao, China
| | - S Y Wang
- Emergency Ward, the People's Hospital of Zhangqiu Area, Jinan, China
| | - X H Yang
- Department of Pharmacy, the People's Hospital of Zhangqiu Area, Jinan, China
| | - L N Ma
- Department of Internal Medicine, Community Health Service Centers of Grand View Garden, Blood Station of Jinan, Jinan, China
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Dai Y, Song YZ, Chen DL, Song WH, Xie JM, Ye Y. Depolarization of Lithium Iron Phosphate Batteries by Multi-Walled Carbon Nanotube/Graphite Double-Layer Anode. Russ J Phys Chem 2020. [DOI: 10.1134/s003602442008004x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Chen FC, Fei Y, Li SJ, Wang Q, Luo X, Yan J, Lu WJ, Tong P, Song WH, Zhu XB, Zhang L, Zhou HB, Zheng FW, Zhang P, Lichtenstein AL, Katsnelson MI, Yin Y, Hao N, Sun YP. Temperature-Induced Lifshitz Transition and Possible Excitonic Instability in ZrSiSe. Phys Rev Lett 2020; 124:236601. [PMID: 32603145 DOI: 10.1103/physrevlett.124.236601] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 04/06/2020] [Accepted: 05/22/2020] [Indexed: 06/11/2023]
Abstract
The nodal-line semimetals have attracted immense interest due to the unique electronic structures such as the linear dispersion and the vanishing density of states as the Fermi energy approaching the nodes. Here, we report temperature-dependent transport and scanning tunneling microscopy (spectroscopy) [STM(S)] measurements on nodal-line semimetal ZrSiSe. Our experimental results and theoretical analyses consistently demonstrate that the temperature induces Lifshitz transitions at 80 and 106 K in ZrSiSe, which results in the transport anomalies at the same temperatures. More strikingly, we observe a V-shaped dip structure around Fermi energy from the STS spectrum at low temperature, which can be attributed to co-effect of the spin-orbit coupling and excitonic instability. Our observations indicate the correlation interaction may play an important role in ZrSiSe, which owns the quasi-two-dimensional electronic structures.
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Affiliation(s)
- F C Chen
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
- University of Science and Technology of China, Hefei 230026, China
| | - Y Fei
- Department of Physics, Zhejiang University, Hangzhou 310027, China
| | - S J Li
- Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
- College of Mathematics and Physics, Beijing University of Chemical Technology, Beijing 100029, China
| | - Q Wang
- University of Science and Technology of China, Hefei 230026, China
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - X Luo
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - J Yan
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
- University of Science and Technology of China, Hefei 230026, China
| | - W J Lu
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - P Tong
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - W H Song
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - X B Zhu
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - L Zhang
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - H B Zhou
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - F W Zheng
- Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
| | - P Zhang
- Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
- School of Physics and Physical Engineering, Qufu Normal University, Qufu 273165, China
| | - A L Lichtenstein
- Institute for Theoretical Physics, University Hamburg, Jungiusstrasse 9, D-20355 Hamburg, Germany
- Theoretical Physics and Applied Mathematics Department, Ural Federal University, Mira Street 19, 620002 Ekaterinburg, Russia
| | - M I Katsnelson
- Theoretical Physics and Applied Mathematics Department, Ural Federal University, Mira Street 19, 620002 Ekaterinburg, Russia
- Institute for Molecules and Materials, Radboud University, Heijendaalseweg 135, NL-6525AJ Nijmegen, The Netherlands
| | - Y Yin
- Department of Physics, Zhejiang University, Hangzhou 310027, China
- Collaborative Innovation Center of Microstructures, Nanjing University, Nanjing 210093, China
| | - Ning Hao
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
| | - Y P Sun
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei 230031, China
- Collaborative Innovation Center of Microstructures, Nanjing University, Nanjing 210093, China
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Yan J, Luo X, Gao JJ, Lv HY, Xi CY, Sun Y, Lu WJ, Tong P, Sheng ZG, Zhu XB, Song WH, Sun YP. The giant planar Hall effect and anisotropic magnetoresistance in Dirac node arcs semimetal PtSn 4. J Phys Condens Matter 2020; 32:315702. [PMID: 32235052 DOI: 10.1088/1361-648x/ab851f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Topological semimetals (TSMs) present intriguing quantum states and have attracted much attention in recent years because of exhibiting various anomalous magneto-transport phenomena. Theoretical prediction shows that some novel phenomena, such as negative magnetoresistance (MR) and the planar Hall effect (PHE), originate from the chiral anomaly in TSMs. In this work, high-field (33 T) Shubnikov-de Haas (SdH) oscillations are obtained to reveal the topology of PtSn4. Giant PHE and anisotropic magnetoresistance (AMR) are observed in Dirac node arcs of semimetal PtSn4. First, a non-zero transverse voltage can be acquired while tilting the in-plane magnetic field. Moreover, the amplitude of PHE sharply increases at T * ∼ 50 K with decreasing temperature, which is suggested to be related to the Fermi surface reconstruction observed in PtSn4. Subsequently, the field-dependent amplitudes of the PHE show an abnormal behavior around 50 K, which is thought to stem from the complex correlation between the chiral charge and electric one in PtSn4 driving the system into different coupling states due to the complicated band structure. On the other hand, the relative AMR is negative and up to -98% at 8.5 T. Our work proves that the PHE measurements are a convincing transport fingerprint feature to confirm the chiral anomaly in TSMs.
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Affiliation(s)
- J Yan
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, People's Republic of China. University of Science and Technology of China, Hefei, 230026, People's Republic of China
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12
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Wang YT, Song WH, Wu YJ, Zhang P. P841Derivation and validation of novel score system for predicting all-cause death and myocardial infarction in coronary artery ectasia. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0439] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Coronary artery ectasia (CAE) bears high risk of death and myocardial infarction. Risk stratification in CAE patients is crucial for their management, but there were no risk score systems intended for risk evaluation of CAE patients so far.
Methods
In a retrospective cohort of 595 patients with CAE, we collected the baseline characteristics (clinical history, biomarkers and quantitative coronary angiography variables). Follow-up were conducted and the end-point event was the composite of all-cause death and non-fatal myocardial infarction. The candidate predictors of end-point event were analyzed using Cox proportional hazards regression models to derive a risk score in the form of nomogram. The predictive performance and discriminative ability of the novel nomogram were determined by concordance index (C-index) and calibration curve, that were validated internally. Risk stratification by nomogram-predicted risk score was further evaluated.
Results
During a median follow-up time of 62.3 months, 26 all-cause deaths and 37 non-fatal myocardial infarctions were identified. The final risk-prediction model named ABCD-CAE score included four items: age (A), Brain natriuretic peptide (B), high sensitivity C-reactive protein (C) and maximum Dilated area of ectatic lesions (D). The nomogram yielded a C-index for end-point event of 0.72 (95% confidence interval, 0.64 - 0.79). The calibration curve demonstrated that there is good agreement between prediction by nomogram and actual observation of end-point events. Compared with the low-risk group (score ≤100), the risk of composite events was significantly increased in the intermediate-risk group (score: 100–130) and high-risk group (score >130) [hazard ratio (95% confidence interval): 2.23 (1.23–4.06), P=0.008 and 7.02 (3.81–12.97), P<0.001 respectively].
ABCD-CAE nomogram for risk prediction
Conclusions
The ABCD-CAE score is a simple four-item risk score, that provides a clinically useful tool for the risk prediction of all-cause death and myocardial infarction in patients with CAE. This user-friendly tool might support clinical decision making for the management of CAE.
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Affiliation(s)
- Y T Wang
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China
| | - W H Song
- Fuwai Hospital- Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Y J Wu
- Fuwai Hospital- Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - P Zhang
- Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China
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13
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Kan XC, Wang BS, Zhang L, Zu L, Lin S, Lin JC, Tong P, Song WH, Sun YP. Critical behavior in tetragonal antiperovskite GeNFe 3 with a frustrated ferromagnetic state. Phys Chem Chem Phys 2017; 19:13703-13709. [PMID: 28497140 DOI: 10.1039/c6cp08020k] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [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
Tetragonal GeNFe3 has a second-order ferromagnetic (FM) to paramagnetic transition at 76 K. Our integrated investigations indicate that the ground FM state is frustrated and the tetragonal symmetry is retained below 550 K based on the results of variable temperature X-ray diffraction. Critical behavior was analyzed by a systematic bulk magnetization study. The estimated critical exponents by three different methods (modified Arrott plot, the Kouvel-Fisher method, and critical isotherm analysis) conformably suggest that long-range magnetic coupling described by mean-field (MF) theoretical model is dominant in GeNFe3. The experimental M-T-H data collapse into two independent branches according to the scaling equations m = f±(h) with the renormalized magnetization m = ε-βM(H, ε) and the magnetic field h = Hε-(β+γ). The exchange distance is estimated as J(r) ∼ r-4.8 on the basis of the β and γ values, which lies between the long-range MF model (r-4.5) and the short-range 3D Heisenberg (3DH) model (r-5). Our results indicate that the competition between local magnetic moments of iron 3d electronic state and itinerant covalent interactions of N-Fe bonds should be responsible for critical behavior in this system.
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Affiliation(s)
- X C Kan
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China.
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14
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Yang C, Qu BY, Pan SS, Zhang L, Zhang RR, Tong P, Xiao RC, Lin JC, Guo XG, Zhang K, Tong HY, Lu WJ, Wu Y, Lin S, Song WH, Sun YP. Large Positive Thermal Expansion and Small Band Gap in Double-ReO 3-Type Compound NaSbF 6. Inorg Chem 2017; 56:4990-4995. [PMID: 28406625 DOI: 10.1021/acs.inorgchem.7b00002] [Citation(s) in RCA: 5] [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: 11/29/2022]
Abstract
Double-ReO3-type structure compound NaSbF6 undergoes a low-temperature rhombohedral to high-temperature cubic phase between 303 and 323 K, as revealed by temperature-dependent X-ray diffractions. Although many double-ReO3-type fluorides exhibit either low thermal expansion or negative thermal expansion (NTE), NaSbF6 exhibits positive thermal expansion (PTE) with a large volumetric coefficient of thermal expansion, αv = 62 ppm/K, in its cubic phase. Raman spectroscopy reveals that the low-frequency transverse vibration of fluorine atoms is stiffened in NaSbF6, compared with the typical NTE compound CaZrF6 with the same structure. The related weak contraction associated with the polyhedral rocking would be overcome by the notable elongation of the Na-F bond length on heating, thus leading to the large volumetric PTE. Unlike ScF3 and CaZrF6 which are insulators with a wide band gap, a relative small band gap of 3.76 eV was observed in NaSbF6. The small band gap can be attributed to the hybridization between the Sb 5s and F 2p orbitals.
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Affiliation(s)
- C Yang
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China.,University of Science and Technology of China , Hefei 230026, People's Republic of China
| | - B Y Qu
- Laboratory of Amorphous Materials, School of Materials Science and Engineering, Hefei University of Technology , Hefei 230009, People's Republic of China
| | - S S Pan
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China
| | - L Zhang
- High Magnetic Field Laboratory, Chinese Academy of Sciences , Hefei 230031, People's Republic of China
| | - R R Zhang
- High Magnetic Field Laboratory, Chinese Academy of Sciences , Hefei 230031, People's Republic of China
| | - P Tong
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China
| | - R C Xiao
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China.,University of Science and Technology of China , Hefei 230026, People's Republic of China
| | - J C Lin
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China
| | - X G Guo
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China.,University of Science and Technology of China , Hefei 230026, People's Republic of China
| | - K Zhang
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China.,University of Science and Technology of China , Hefei 230026, People's Republic of China
| | - H Y Tong
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China.,University of Science and Technology of China , Hefei 230026, People's Republic of China
| | - W J Lu
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China
| | - Y Wu
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China
| | - S Lin
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China
| | - W H Song
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China
| | - Y P Sun
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences , Hefei 230031, People's Republic of China.,High Magnetic Field Laboratory, Chinese Academy of Sciences , Hefei 230031, People's Republic of China.,Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, People's Republic of China
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15
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Wang PS, Sun SS, Cui Y, Song WH, Li TR, Yu R, Lei H, Yu W. Pressure Induced Stripe-Order Antiferromagnetism and First-Order Phase Transition in FeSe. Phys Rev Lett 2016; 117:237001. [PMID: 27982652 DOI: 10.1103/physrevlett.117.237001] [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] [Received: 06/16/2016] [Indexed: 06/06/2023]
Abstract
To elucidate the magnetic structure and the origin of the nematicity in FeSe, we perform a high-pressure ^{77}Se NMR study on FeSe single crystals. We find a suppression of the structural transition temperature with pressure up to about 2 GPa from the anisotropy of the Knight shift. Above 2 GPa, a stripe-order antiferromagnetism that breaks the spatial fourfold rotational symmetry is determined by the NMR spectra under different field orientations and with temperatures down to 50 mK. The magnetic phase transition is revealed to be first-order type, implying the existence of a concomitant structural transition via a spin-lattice coupling. Stripe-type spin fluctuations are observed at high temperatures, and remain strong with pressure. These results provide clear evidence for strong coupling between nematicity and magnetism in FeSe, and therefore support a universal scenario of magnetic driven nematicity in iron-based superconductors.
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Affiliation(s)
- P S Wang
- Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China
| | - S S Sun
- Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China
| | - Y Cui
- Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China
| | - W H Song
- Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China
| | - T R Li
- Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China
| | - Rong Yu
- Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China
- Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China and Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
| | - Hechang Lei
- Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China
| | - Weiqiang Yu
- Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China
- Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China and Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
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16
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Kan XC, Wang BS, Zu L, Lin S, Lin JC, Tong P, Song WH, Sun YP. Anomalous Hall effect in tetragonal antiperovskite GeNFe3 with a frustrated ferromagnetic state. RSC Adv 2016. [DOI: 10.1039/c6ra15976a] [Citation(s) in RCA: 4] [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] Open
Abstract
We report observed anomalous Hall effect (AHE) behavior in the antiperovskite compound GeNFe3 with a tetragonal symmetry.
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Affiliation(s)
- X. C. Kan
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- China
| | - B. S. Wang
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- China
| | - L. Zu
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- China
| | - S. Lin
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- China
| | - J. C. Lin
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- China
| | - P. Tong
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- China
| | - W. H. Song
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- China
| | - Y. P. Sun
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- China
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17
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Abstract
Mn1−xZnxCr2O4 (0 ≤ x ≤ 1) single crystals have been grown using the chemical vapor transport (CVT) method.
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Affiliation(s)
- G. T. Lin
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei
- China
| | - X. Luo
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei
- China
| | - Q. L. Pei
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei
- China
| | - F. C. Chen
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei
- China
| | - C. Yang
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei
- China
| | - J. Y. Song
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei
- China
| | - L. H. Yin
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei
- China
| | - W. H. Song
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei
- China
| | - Y. P. Sun
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei
- China
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18
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Zuo XZ, Yang J, Yuan B, Kan XC, Zu L, Qin YF, Zhu XB, Song WH, Sun YP. Multiferroic properties of Bi0.5K0.5TiO3–BiFe1−xCoxO3 (0 ≤ x ≤ 0.2) solid solution. RSC Adv 2015. [DOI: 10.1039/c5ra19768f] [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: 11/21/2022] Open
Abstract
We have successfully prepared a binary lead-free solid-solution of Bi0.5K0.5TiO3–BiFe1−xCoxO3 using a modified Pechini method and investigated the magnetic and ferroelectric properties of Bi0.5K0.5TiO3–BiFe1−xCoxO3 (0 ≤ x ≤ 0.2).
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Affiliation(s)
- X. Z. Zuo
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People’s Republic of China
| | - J. Yang
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People’s Republic of China
| | - B. Yuan
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People’s Republic of China
| | - X. C. Kan
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People’s Republic of China
| | - Lin Zu
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People’s Republic of China
| | - Y. F. Qin
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People’s Republic of China
| | - X. B. Zhu
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People’s Republic of China
| | - W. H. Song
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People’s Republic of China
| | - Y. P. Sun
- Key Laboratory of Materials Physics
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- People’s Republic of China
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19
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Ma H, Zhang W, Song WH, Sun P, Jia ZH. Effects of tryptophan supplementation on cashmere fiber characteristics, serum tryptophan, and related hormone concentrations in cashmere goats. Domest Anim Endocrinol 2012; 43:239-50. [PMID: 22541934 DOI: 10.1016/j.domaniend.2012.03.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Revised: 03/15/2012] [Accepted: 03/15/2012] [Indexed: 11/26/2022]
Abstract
This study was designed to investigate the effects of tryptophan (Trp) supplementation on cashmere fiber characteristics and on serum Trp, melatonin (MEL), prolactin (PRL), insulin-like growth factor 1 (IGF-1), triiodothyronine (T3), and thyroxine (T4) concentrations in cashmere goats during the cashmere fast-growth period. Thirty-six Liaoning cashmere wether goats were stratified on the basis of body weight (28±0.8 kg) and assigned randomly to 1 of the following 4 rumen-protected Trp treatments: 0, 2.0, 4.0, and 6.0 g per goat per day. The experimental period lasted 137 d. Blood samples were collected monthly during the daytime (8:00 AM) and at night (8:00 PM). Tryptophan supplementation improved cashmere growth rates, cashmere weight, and body weight (P=0.001) and increased serum Trp levels, nighttime MEL concentrations, IGF-1, and T3 and T4 concentrations (P<0.05). Across the treatments and sampling months, a highly positive correlation between cashmere growth rate and nighttime serum MEL concentrations was observed (r=0.879, P=0.001). A moderately negative correlation between cashmere growth rates and serum PRL concentrations during the day and at night (rday=-0.645, P=0.007; rnight=-0.583, P=0.018) was observed. A moderately positive correlation between the cashmere growth rate and the daytime serum IGF-1 concentration (r=0.536, P=0.032) was observed, and no correlation was found between the cashmere growth rate and the other serum hormone concentrations. These data indicate that changes in serum concentrations of MEL, IGF-1, and PRL are related to cashmere growth in Liaoning cashmere goats during the cashmere fast-growth period. Under the experimental conditions of the current trial, we suggest that Trp may promote cashmere growth by increasing daytime IGF-1 and nighttime MEL secretion.
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Affiliation(s)
- H Ma
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, People's Republic of China
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20
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Luo X, Sun YP, Hu L, Wang BS, Lu WJ, Zhu XB, Yang ZR, Song WH. Observation of the large magnetocaloric effect in an orbital-spin-coupled system MnV(2)O(4). J Phys Condens Matter 2009; 21:436010. [PMID: 21832456 DOI: 10.1088/0953-8984/21/43/436010] [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: 05/31/2023]
Abstract
The magnetocaloric effect (MCE) in an orbital-spin-coupled spinel vanadate MnV(2)O(4) is investigated by magnetization measurement. MnV(2)O(4) has ferrimagnetic ordering occurring at T(C) = 57 K. The maximum magnetic entropy change reaches 14.8 and 24.0 J kg(-1) K(-1) for field changes of 0-2 and 0-4 T, respectively. The maximum adiabatic temperature is about 2.9 K for a magnetic field change of 2 T. Except for the spin entropy change, the observed giant MCE is suggested to be related to the orbital entropy change due to the change of the orbital state of V(3+) induced by an applied magnetic field around T(C).
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Affiliation(s)
- X Luo
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China
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21
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Abstract
The abilities of montmorillonite (MMT) and Cu (II)-bearing montmorillonite (Cu-MMT) for adsorption of Cd from aqueous solutions have been studied at different optimized conditions of shaking time, pH value, and initial concentration, respectively. The results showed that the adsorbability of Cu-MMT onto Cd is stronger than the MMT. The amount of Cu-MMT necessary to remove Cd from solution was about 0.5 g for 100-200 mg/L Cd solution at a pH of 4.0. The maximum adsorption (94%) was 20 min of shaking time using Cu-MMT as adsorbent. The maximum adsorption of Cd = 95% at a pH of 4.0. By increasing the initial concentration, the adsorption amount of Cd onto Cu-MMT increased. Animal experiment of this study indicated that the addition of Cu-MMT to the Cd-contaminated diet of pigs reduced significantly the Cd levels in tissues (p < 0.05) and increased contents in feces (p < 0.01), improving the safety of animal products. Thus, the overall results established the use of Cu-MMT as a heavy metal adsorbent in animal's diets, implying a potential protective role against heavy metal toxicities.
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Affiliation(s)
- D Y Yu
- Animal Science College, Zhejiang University (Hua Jia Chi Campus), Hangzhou, People's Republic of China.
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22
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Abstract
The critical behavior of the double perovskite La(2)NiMnO(6) was investigated by measurement of the magnetization around the Curie temperature T(C). The magnetic data were analyzed in the critical region using the Kouvel-Fisher method to yield the critical exponents of β = 0.408 ± 0.011 with T(C) = 270.50 (from the temperature dependence of the spontaneous magnetization below T(C)) and γ = 1.295 ± 0.015 with T(C) = 271.10 (from the temperature dependence of the inverse initial susceptibility above T(C)). The critical magnetization isotherm M(T(C),H) gives δ = 4.139 ± 0.090. The critical exponents obtained by this method obey the Widom scaling relation δ = 1+γ/β, implying the critical exponents are reliable. The values of critical exponents are close to those predicted by the three-dimensional (3D) Heisenberg model with short-range interactions.
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Affiliation(s)
- X Luo
- Key Laboratory of Materials Physics, Institute of Solid State Physics, and High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, People's Republic of China
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23
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Song JH, Kim MH, Shin KM, Choi HY, Song WH. Neurosurgical aspects of sedimentation levels in acute intracerebral haematoma. J Clin Neurosci 2008; 5:406-8. [PMID: 18639062 DOI: 10.1016/s0967-5868(98)90272-7] [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: 01/13/1997] [Accepted: 03/03/1997] [Indexed: 10/26/2022]
Abstract
We describe the neurosurgical aspects of sedimentation levels that are rarely found in acute intracerebral haematomas (ICH). We had four patients with acute ICH whose cerebral computed tomography revealed sedimentation levels. Two patients had received thrombolytic therapy for ischaemic heart disease and one for ischaemic stroke. Another patient, who was diagnosed later as having a coagulation disorder, did not have any medical history on admission. All patients had emergency ICH drainage under local anaesthesia. In the immediate postoperative period, we observed dramatic improvement in all the patients, without surgical complications. The sedimentation level in an ICH should be identified as a specific indicator of a coagulation defect and a thorough search for possible underlying coagulopathy is warranted. We believe that simple ICH drainage should be performed as the haematoma is in a liquid form.
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Affiliation(s)
- J H Song
- Department of Neurosurgery, Ewha Women's University, 911-1, Yang-Cheon gu, Mokdong College of Medicine, Seoul 158-710, Korea
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24
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Kim JS, Song WH, Shin C, Park CG, Seo HS, Shim WJ, Oh DJ, Ryu SH, Rho YM. The prevalence and awareness of hypertension and the relationship between hypertension and snoring in the Korean population. Korean J Intern Med 2001; 16:62-8. [PMID: 11590903 PMCID: PMC4531715 DOI: 10.3904/kjim.2001.16.2.62] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND Hypertension is the most important, and yet modifiable, risk factor for cardiovascular diseases. But in many countries, hypertension remains poorly controlled. Moreover, sleep apnea syndrome has shown that it is correlated with hypertension. The purpose of this study was to investigate the prevalence, awareness and control of hypertension among the Korean people and to evaluate the relationship between hypertension and snoring. METHODS A total of 640 subjects living in Ansan, a regional city in Korea, were selected randomly, and trained nursing students investigated their age, sex, medical history, blood pressure, body mass index (BMI) and snoring score. Blood pressures were measured three times with a 10-minute interval and then averaged. The degree of snoring was estimated using a questionnaire. We divided the subjects into hypertensive (BP > or = 140/90 mmHg) versus normotensive group and snorer versus non-snorer group, and correlated hypertension with snoring. RESULTS Of 640 subjects, 311 were male. The mean age was 39.7 +/- 14.6 years (18-77 years), the mean BMI (body mass index) was 22.4 +/- 3.0 kg/m2. The mean systolic and diastolic blood pressure was 121 +/- 15.7 mmHg and 79.5 +/- 11.6 mmHg. The prevalence and awareness of hypertension were 22.2% and 16.9%, respectively, and the prevalence of snoring was 35.2%. With the increment of age, in the male, the prevalence of hypertension and snoring were higher, and the snorer group showed a higher risk of hypertension than the non-snorer group (Odds ratio 2.32, CI = 1.56-3.39, p = 0.0001). CONCLUSION In Korea, the prevalence of hypertension was similar to that in the western countries, but the awareness of hypertension was much lower compared with western countries. The prevalence of hypertension was higher in the snorer group, so more research on the correlation between the two conditions should be advanced in the future.
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Affiliation(s)
- J S Kim
- Department of Internal Medicine, College of Medicine, Korea University, Seoul, Korea
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Kim SM, Shim WJ, Lim HE, Hwang GS, Song WH, Lim DS, Kim YH, Seo HS, Oh DJ, Ro YM. Assessment of coronary flow reserve with transthoracic Doppler echocardiography: comparison with intracoronary Doppler method. J Korean Med Sci 2000; 15:139-45. [PMID: 10803688 PMCID: PMC3054624 DOI: 10.3346/jkms.2000.15.2.139] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
To evaluate the feasibility and usefulness of transthoracic Doppler echocardiography (TTDE) as a non-invasive method in recording distal anterior descending (LAD) coronary flow velocity, we compared coronary flow reserve (CFR) measured by TTDE with measurements by intracoronary Doppler wire (ICDW). Twenty-one patients without LAD stenosis were studied. ICDW performed at baseline and after intracoronary injection of 18 microg adenosine. TTDE was performed at baseline and after intravenous adenosine (140 microg/kgmin for 2 min). Adequate Doppler recordings of coronary flow velocities during systole were obtained in 14 of 21 study patients (67%) and during diastole in 17 (81%) patients. Baseline and hyperemic peak diastolic flow velocities measured by TTDE were significantly smaller than those obtained by ICDW (p<0.05). However, diminishing trends of diastolic and systolic velocity ratio after hyperemia were similarly observed in both methods. CFR obtained by TTDE (3.0+/-0.5), was higher than the value calculated by ICDW (2.5+/-0.4). There were significant correlations between the values obtained by the two methods (r=0.72, p<0.01). It is concluded that TTDE is a feasible method in measuring coronary flow velocity and appears to be a promising non-invasive method in evaluating CFR.
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Affiliation(s)
- S M Kim
- Department of Internal Medicine, Korea University College of Medicine, Seoul
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Shim WJ, Lee EM, Hwang GS, Ahn JC, Song WH, Lim DS, Park CG, Kim YH, Seo HS, Oh DJ, Ro YM. Microvascular integrity as a predictor of left ventricular remodeling after acute anterior wall myocardial infarction. J Korean Med Sci 1998; 13:466-72. [PMID: 9811174 PMCID: PMC3054515 DOI: 10.3346/jkms.1998.13.5.466] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
The purpose of this study was to investigate the relation of microvascular integrity and ventricular remodeling after acute myocardial infarction. Twenty-six patients with first acute anterior myocardial infarction were studied before discharge with myocardial contrast echocardiography (MCE). Opacification index (OI) and wall motion index were calculated in the left anterior descending artery territory and left ventricular diastolic volume was measured at baseline and during a 9-month follow-up. In total 26 patients, the regional wall motion improved but the left ventricular volume and global function was not changed significantly at follow-up. When the patients were divided into 3 groups according to opacification index (> or = 0.75, 0.5 approximately 0.75, < or = 0.5) at baseline, functional recovery was not observed and significant left ventricular dilatation was developed in patients with < or = 0.5 OI. Among the baseline echo-parameters such as ejection fraction, wall motion score, left ventricular volume and opacification index, the best predictor for long term left ventricular dilatation was the opacification index by multivariate analysis. In patients with acute anterior wall infarction the assessment of microvascular integrity by MCE at acute stage provides useful information regarding recovery of dysfunctional regional wall motion and ventricular remodeling.
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Affiliation(s)
- W J Shim
- Department of Cardiology, Korea University Hospital, Seoul.
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Song WH. [Control of tuberculosis in China]. Zhonghua Liu Xing Bing Xue Za Zhi 1997; 18:109-11. [PMID: 9812512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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28
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Song WH. [A survey of atypical mycobacterial infection in China]. Zhonghua Jie He He Hu Xi Za Zhi 1992; 15:333-5, 378-9. [PMID: 1339612] [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: 12/26/2022]
Abstract
A survey of atypical mycobacterial infection in China was conducted in 1990. The infection rate of the country was 15.4%. Zhejing province had the highest rate (44.9%) and Xizang had the lowest (1.9%). The infection rate of the southern part of the country was higher than the northern part; the rate was higher in the worm areas than the cold areas. The rate increased with the age. The highest peak was on the sixty and then decreased. There was no significant difference of the infection rate in sex or minority races. The reagents used for the identification of atypical mycobacterium, the criteria for the positive reaction, the epidemiological trend of atypical mycobacterial infection and the further surveillance approaches in the country and been discussed.
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Affiliation(s)
- W H Song
- Tuberculosis Control Center, Ministry of Public Health, Beijing
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Tai JJ, Song WH. Linkage disequilibrium and linkage information from one-child families. Hum Hered 1991; 41:316-23. [PMID: 1778607 DOI: 10.1159/000154019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
In linkage analysis a single-child family is usually considered to be completely uninformative. This article shows that such a family can provide information on linkage disequilibrium, even if it provides no information on linkage equilibrium. A transition matrix consisting of the recombination fraction and the phase proportion is proposed to study the genetic transmission from a pair of parents to their single child. The information about linkage for a single-child family is shown to be confounded by the phase proportion. This explains why such a family used to be considered uninformative under the assumption of linkage equilibrium. By reparametrizing the recombination fraction and the phase proportion into one parameter, it is demonstrated that extracting information on linkage disequilibrium is feasible. The study of power of the testing method proposed here is carried out by simulation.
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Affiliation(s)
- J J Tai
- Institute of Statistical Science, Academia Sinica, Taipei, Taiwan, ROC
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Song WH, Liu XH, Wei SX, Li YQ. [Genetic study of human adenosine deaminase]. Hua Xi Yi Ke Da Xue Xue Bao 1988; 19:434-6. [PMID: 3243542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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31
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Song WH. [Evaluation of BCG vaccination programme in the rural areas of Beijing]. Zhonghua Jie He He Hu Xi Xi Ji Bing Za Zhi 1986; 9:9-11, 61. [PMID: 3488884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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