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Superconductivity 2022年第1期1卷 27-33页

作者： j.Li Y.Shi G.M.Zhang L.W.jing j.x.zheng C.L.Liu W.Yuan Y.S.Wang M.Song Y.j.xia x.H.Zong Y.W.Han D.N.zheng x.j.Zhou T.Matsushita G.Nishijima The Institute of Physics Chinese Academy of SciencesBeijing 100190China The Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China The Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China Eastern Superconductor Science&Technology(Suzhou)Co LtdSuzhou 215299China Guangdong Power Grid Corporation Guangzhou 510630China Shanghai International Superconductor Technology Co LtdShanghai 200444China Department of Computer Science and Electronics Kyushu Institute of Technology Iizuk1Japan National Institute for Materials Scienc5 Tsukuba 305-0003Japan

Currently,IEC/TC90 is working on standardizing the method for measuring critical current(Ic)in superconducting *** the end of 2020,an international round robin test(RRT)was organized,in which five Chinese institutions participated,and four accomplished the *** electric-field versus current(E-I)curves obtained by each institution are highly *** obtained by different institutions are nearly identical after appropriate curve averaging,indicating high reproducibility,except the last participant's inner core *** discrepancy was later determined to be the result of sample cable *** excluding highly deviated data,it is determined that the maximum relative standard uncertainty in I_(c) is 0.7%,and the maximum relative standard uncertainty in n-value is 12.8%.The I_(c)values are comparable to japan's domestic RRT results,but the n-values are significantly *** test results support the DC four-terminal method as a recommended test method,with a target relative uncertainty of less than 2%for the Ic value.

关键词： Superconducting cable Round robin test Standardization

Supplemental Chromium Picolinate Promotes Growth of Broiler Chickens by Enhancing Insulin Receptor Gene Expression

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journal of Animal Science and Biotechnology 2010年第1期1卷 7-14页

作者： Z.Z.Liu G.Q.Wu j.x.zheng j.Y.An N.Yang G.Y.xu CollegeofAnimalScienceandTechnologv.CllinaAzriculturalU11iversity Beijing100193.China

Chromium has been recognized for dec- ades as a nutritional factor that promotes the growth of broiler chickens, but the molecular mechanism is still not clearly understood. The present study was de- signed to investigate the physiological and molecular mechanisms of the effects of supplemental chromium picolinate on the growth of broiler chickens. A total of 144 21-day-old Arbor Acres male broiler chicks were randomly divided into a control and an experimental group. The control group was fed a basal diet, and the experimental group was fed the same basal diet sup- plemented with 200 μg/kg chromium picolinate. The experiment lasted for three weeks from day 28 to 42 of the birds.. Supplementation with 200 μg/kg chro- mium picolinate significantly increased body weight （ P 〈 0.05）. Serum insulin levels in chickens of the experimental group were increased significantly （P 〈0. 05 ）, whereas serum glucose concentrations were decreased （P 〈 0.05）. No significant changes were observed in serum lipid profiles in chickens fed the di- et supplemented with chromium picolinate. Gene ex- pression levels of the insulin receptor （IR） and insu- lin receptor substrate 1 （IRS-1）, two pivotal compo- nents of the insulin signaling pathway, were also in- vestigated using Real-time quantitative PCR. IR ex- pression was significantly （P 〈 0.05） increased fol- lowing chromium supplementation. Therefore, supple- mental chromium picolinate had a beneficial effect on the growth of broilers. In agreement with observations in mammals, chromium might exert its effect via po- tentiating insulin action, and ultimately by stimulating anabolism without altering body composition in chick- ens.

关键词： broiler chickens chromium growth IR IRS-1

黄爱龙教授:“新型冠状病毒感染诱导机体特异性体液免疫反应的新认识”

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重庆医科大学学报 2021年第12期46卷 F0002-F0002页

作者： Y.Lin Z.Y.Zhao j.x.zheng 不详

由严重急性呼吸综合征冠状病毒2(SARS-CoV-2)引起的2019年新型冠状病毒肺炎(COVID-19)疫情目前仍在全球大范围流行,这使全球公共卫生健康面临持续挑战。根据世界卫生组织最新实时统计数据:截至2021年3月28日,全球累计新冠肺炎确诊病例1... 详细信息

由严重急性呼吸综合征冠状病毒2(SARS-CoV-2)引起的2019年新型冠状病毒肺炎(COVID-19)疫情目前仍在全球大范围流行,这使全球公共卫生健康面临持续挑战。根据世界卫生组织最新实时统计数据:截至2021年3月28日,全球累计新冠肺炎确诊病例1.26亿例,累计死亡病例276.97万例。新冠肺炎疫情已对人类的健康和预期寿命等产生了巨大影响,严重损害了全球的叉流合作和稳定发展。新冠病毒感染人体后,可诱导机体产生病毒特异性的体液免疫反应,通过效应B细胞等产生大量的病毒抗原特异性抗体IgA、IgM和IgG等(含中和抗体)来控制病毒的增殖、扩散和再感染。

关键词：体液免疫反应特异性体液免疫中和抗体病毒特异性病毒感染抗原特异性抗体严重急性呼吸综合征冠状病毒全球公共卫生

Pyroptosis,ferroptosis,and autophagy in spinal cord injury:regulatory mechanisms and therapeutic targets

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Neural Regeneration Research 2025年第10期20卷 2787-2806页

作者： Qingcong zheng Du Wang Rongjie Lin Weihong xu Department of Spinal Surgery the First Affiliated Hospital of Fujian Medical UniversityFuzhouFujian ProvinceChina Arthritis Clinical and Research Center Peking University People’s HospitalBeijingChina Department of Orthopedic Surgery Fujian Medical University Union HospitalFuzhouFujian ProvinceChina

Regulated cell death is a form of cell death that is actively controlled by *** studies have shown that regulated cell death plays a key role after spinal cord *** and ferroptosis are newly discovered types of regulated cell deaths that have been shown to exacerbate inflammation and lead to cell death in damaged spinal ***,a complex form of cell death that is interconnected with various regulated cell death mechanisms,has garnered significant attention in the study of spinal cord *** injury triggers not only cell death but also cellular survival *** signaling pathways play pivotal roles in influencing the processes of both deterioration and repair in spinal cord injury by regulating pyroptosis,ferroptosis,and ***,this review aims to comprehensively examine the mechanisms underlying regulated cell deaths,the signaling pathways that modulate these mechanisms,and the potential therapeutic targets for spinal cord *** analysis suggests that targeting the common regulatory signaling pathways of different regulated cell deaths could be a promising strategy to promote cell survival and enhance the repair of spinal cord ***,a holistic approach that incorporates multiple regulated cell deaths and their regulatory pathways presents a promising multi-target therapeutic strategy for the management of spinal cord injury.

关键词： autophagy cell death ferroptosis inflammation pathological mechanisms pyroptosis regulated cell death regulatory pathways spinal cord injury therapeutic targets

Hypoxia-preconditioned bone marrow-derived mesenchymal stem cells protect neurons from cardiac arrest-induced pyroptosis

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Neural Regeneration Research 2025年第4期20卷 1103-1123页

作者： xiahong Tang Nan zheng Qingming Lin Yan You zheng Gong Yangping Zhuang jiali Wu Yu Wang Hanlin Huang jun Ke Feng Chen Shengli Clinical Medical College of Fujian Medical University Fujian Medical UniversityFuzhouFujian ProvinceChina Department of Emergency Fujian Provincial HospitalFuzhouFujian ProvinceChina Fujian Provincial Key Laboratory of Emergency Medicine FuzhouFujian ProvinceChina The Second Department of Intensive Care Unit Fujian Provincial Hospital South BranchFuzhouFujian ProvinceChina

Cardiac arrest can lead to severe neurological impairment as a result of inflammation,mitochondrial dysfunction,and post-cardiopulmonary resuscitation neurological *** preconditioning has been shown to improve migration and survival of bone marrow–derived mesenchymal stem cells and reduce pyroptosis after cardiac arrest,but the specific mechanisms by which hypoxia-preconditioned bone marrow–derived mesenchymal stem cells protect against brain injury after cardiac arrest are *** this end,we established an in vitro co-culture model of bone marrow–derived mesenchymal stem cells and oxygen–glucose deprived primary neurons and found that hypoxic preconditioning enhanced the protective effect of bone marrow stromal stem cells against neuronal pyroptosis,possibly through inhibition of the MAPK and nuclear factor κB ***,we transplanted hypoxia-preconditioned bone marrow–derived mesenchymal stem cells into the lateral ventricle after the return of spontaneous circulation in an 8-minute cardiac arrest rat model induced by *** results showed that hypoxia-preconditioned bone marrow–derived mesenchymal stem cells significantly reduced cardiac arrest–induced neuronal pyroptosis,oxidative stress,and mitochondrial damage,whereas knockdown of the liver isoform of phosphofructokinase in bone marrow–derived mesenchymal stem cells inhibited these *** conclude,hypoxia-preconditioned bone marrow–derived mesenchymal stem cells offer a promising therapeutic approach for neuronal injury following cardiac arrest,and their beneficial effects are potentially associated with increased expression of the liver isoform of phosphofructokinase following hypoxic preconditioning.

关键词： bone marrow–derived mesenchymal stem cells cardiac arrest cardiac resuscitation hypoxic preconditioning liver isoform of phosphofructokinase mitochondria neuroinflammation oxidative stress pyroptosis reactive oxygen species

High-magnetic-field induced charge order in high-T_c cuprate superconductors

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Chinese Physics B 2019年第11期28卷 25-42页

作者： L x zheng j Li T WU Hefei National Laboratory for Physical Science at Microscale University of Science and Technology of ChinaHefei 230026China Key Laboratory of Strongly-coupled Quantum Matter Physics University of Science and Technology of ChinaChinese Academy of SciencesHefei 230026China CAS Center for Excellence in Superconducting Electronics(CENSE) Shanghai 200050China CAS Center for Excellence in Quantum Information and Quantum Physics Hefei 230026China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

In the last few years, charge order and its entanglement with superconductivity are under hot debate in high-Tc community due to the new progress on charge order in high-Tc cuprate superconductors YBa2Cu3O6+x. Here, we will briefly introduce the experimental status of this field and mainly focus on the experimental progress of high-field nuclear magnetic resonance(NMR) study on charge order in YBa2Cu3O6+x. The pioneering high-field NMR work in YBa2Cu3O6+x sets a new stage for studying charge order which has become a ubiquitous phenomenon in high-Tc cuprate superconductors.

关键词： charge order cuprates nuclear magnetic resonance YBa2Cu3O6+x superconductors competing order

Structure evolution of the Fe_(3)C/Fe interface mediated by cementite decomposition in cold-deformed pearlitic steel wires

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journal of Materials Science & Technology 2022年第6期101卷 28-36页

作者： Y.T.Zhou x.H.Shao S.j.zheng x.L.Ma Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology School of Materials Science and EngineeringHebei University of TechnologyTianjin 300130China

Cold-drawn pearlitic steel wire is irreplaceably used in industry owing to its outstanding mechanical property which is dominated by the cementite/ferrite(Fe_(3)C/Fe) interfaces in the material. However, the fine structures of the Fe3C/Fe interfaces in the deformed wires are less known to date. In this work, transmission electron microscopic investigation was performed on the atomic structures of the interfaces with the Isaichev orientation relationship(OR) in the wires with progressive deformation strains. In addition to the effect of the dislocation/interface interactions, this work revealed that the deformation-induced partial decomposition of cementite plays an important role in the interface reconstruction during deformation. The interfacial carbon vacancies generated by cementite decomposition and particularly, the amorphization of cementite layers in the sample with ε > 1 could effectively annihilated the interfacial dislocations and consequently relaxed the interfacial stress. The correlations between the interface structure changes and the mechanical properties of the wires were discussed.

关键词： Pearlitic steel Cementite decomposition Interface structure Deformation Transmission electron microscopy

Processing, Microstructure and Mechanical Properties of Ti6Al4V Particles-Reinforced Mg Matrix Composites

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Acta Metallurgica Sinica(English Letters) 2016年第10期29卷 940-950页

作者： x.M.Wang x.j.Wang x.S.Hu K.Wu M.Y.zheng School of Materials Science and Engineering Harbin Institute of Technology

Novel Ti6Al4V particles-reinforced AZ91 Mg matrix composites were successfully fabricated by stir casting method. The stirring time in semisolid condition directly affected the particle distribution and the quality of the ingots. Furthermore, the optimal speed of the heating and the liquid stirring could overcome particle settlement caused by the density difference between the matrix and the particles. Ti6Al4V particles distributed uniformly in the composites with different particle contents. The average grain size decreased with the increase in the particle contents. The Ti6A14V particles bonded pretty well with the alloy matrix. In addition, there were some interfacial reactions in the composites. There were rod-like A13Ti phases at the interface. The precipitates extended from the particle surface to the matrix, and they might improve the interfacial bonding strength. The ultimate tensile strength, yield strength and elastic modulus were enhanced as the particle contents increased, and the elongation was much better than that of the same matrix material reinforced with SiC particles. Thus, the novel composites exhibit better comprehensive mechanical properties.

关键词： Magnesium matrix composites Ti6Al4V particles Stir casting Microstructure Mechanicalproperties

PLASMA SPRAYED Ti AND HA COATINGS: A COMPARATIVE STUDY BETWEEN APS AND VPS

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Acta Metallurgica Sinica(English Letters) 2005年第3期18卷 339-344页

作者： x.B.zheng H.ji j.Q.Huang C.x.Ding ShanghaiInstituteofCeramics TheChineseAcademyofSciencesShanghai200050China

Titanium (Ti) and hydroxyapatite (HA) coatings have been prepared via air (APS) and vacuum plasma spraying (VPS), and then their composition, structure, bonding strength and bioactivity were examined. The results obtained reveal that in APS process many of Ti were oxidized, but in VPS the oxidization was avoided. VPS T i coating possesses better bonding condition than APS Ti coating. As for HA coat ing, higher crystallinity has been obtained while the coating was deposited by V PS as compared with APS. The simulated body fluid (SBF) tests show that both of APS and VPS HA coatings possess good bioactivity. As compared with APS, VPS is r ecommended as a better method to deposit Ti and HA coatings that can be applied as hard tissue replacement implants.

关键词： vacuum plasma spray Ti HA biocoating

A METHOD OF AS-CAST CRACK PREDICTION BASED UPON NUMERICAL SIMULATION OF SOLIDIFICATION

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Acta Metallurgica Sinica(English Letters) 2004年第6期17卷 817-822页

作者： x.S.zheng S.Yao j.Z.jin ResearchCenterofFoundryEngineering DalianUniversityofTechnologyDalian116024China

Based on the numerical simulation of solidification of castings, a thermal stress formula and a thermal crack initiation criterion are established, which suggest that the cracks initiate at the two-thirds thickness of solidified layer from outside of castings. Cast steel wheels whose diameters are 800mm are employed to testify the positions of cracks through thermal ela- stic-plastic analyses and low magnifying structure observations conventionally. The results show that the numerical prediction of cracks coincides with the measured result, and the cracks do not necessarily follow where the defects such as shrinkage holes and porosities occur. It is also found that surface temperature control is an effective factor to avoid the crack formation.

关键词： solidification crack initiation crack prediction numerical simulation