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Neutron star mass-radius relation with gravitational field shielding by a scalar field

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Research in Astronomy and Astrophysics 2013年第5期13卷 571-578页

作者： Bo-Jun zhang tian-xi zhang Padmaja Guggilla Mostafa Dokhanian Department of Physics and Astronomy Vanderbilt University Department of Physics Alabama A & M University National Astronomical Observatories Chinese Academy of Sciences

The currently well-developed models for equations of state （EoSs） have been severely impacted by recent measurements of neutron stars with a small radius and/or large mass. To explain these measurements, the theory of gravitational field shielding by a scalar field is applied. This theory was recently developed in accor- dance with the five-dimensional （5D） fully covariant Kaluza-Klein （KK） theory that has successfully unified Einstein＇s general relativity and Maxwell＇s electromagnetic theory. It is shown that a massive, compact neutron star can generate a strong scalar field, which can significantly shield or reduce its gravitational field, thus making it more massive and more compact. The mass-radius relation developed under this type of modified gravity can be consistent with these recent measurements of neutron stars. In addition, the effect of gravitational field shielding helps explain why the supernova explosions of some very massive stars （e.g.9 40 MQ as measured recently） actually formed neutron stars rather than black holes as expected. The EoS models, ruled out by measurements of small radius and/or large mass neutron stars according to the the- ory of general relativity, can still work well in terms of the 5D fully covariant KK theory with a scalar field.

关键词： stars: neutron -- gravitation -- black hole physics -- equation of state

Towards full demonstration of high areal loading sulfur cathode in lithium–sulfur batteries

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Journal of Energy Chemistry 2019年第12期28卷 17-22页

作者： Long Kong Qi Jin xi-tian zhang Bo-Quan Li Jin-xiu Chen Wan-Cheng Zhu Jia-Qi Huang Qiang zhang Beijing Key Laboratory o f Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua UniversityBeijing 100084China Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of EducationSchool of Physics and Electronic EngineeringHarbin Normal UniversityHarbin 150025HeilongjiangChina Department of Chemical Engineering Qufu Normal UniversityQufu 273165ShandongChina Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China

Lithium–sulfur(Li–S)batteries have been recognized as promising substitutes for current energy-storage technologies owing to their exceptional advantages in very high-energy density and excellent material *** cathode with high sulfur areal loading is vital for the practical applications of Li–S batteries with very high energy ***,the high sulfur loading in an electrode results in poor rate and cycling performances of batteries in most ***,we used diameters of 5.0(D5)and 13.0(D13)mm to probe the effect of electrodes with different sizes on the rate and cycling performances under a high sulfur loading(4.5 mg cm^-2).The cell with D5 sulfur cathode exhibits better rate and cycling performances comparing with a large(D13)*** the high concentration of lithium polysulfides and corrosion of lithium metal anode impede rapid kinetics of sulfur redox reactions,which results in inferior battery performance of the Li–S cell with large diameter *** work highlights the importance of rational matching of the large sulfur cathode with a high areal sulfur loading,carbon modified separators,organic electrolyte,and Li metal anode in a pouch cell,wherein the sulfur redox kinetics and lithium metal protection should be carefully considered under the flooded lithium polysulfide conditions in a working Li–S battery.

关键词： Lithium sulfur batteries High areal sulfur loading Lithium anode protection Sulfur redox reactions Polysulfide interm ediates

First-principles study of high performance lithium/sodium storage of Ti3C2T2 nanosheets as electrode materials

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Chinese Physics B 2020年第1期29卷 398-407页

作者： Li-Na Bai Ling-Ying Kong Jing Wen Ning Ma Hong Gao xi-tian zhang Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of EducationSchool of Physics and Electronic EngineeringHarbin Normal UniversityHarbin 150025China School of Computer Science and Information Engineering Harbin Normal UniversityHarbin 150025China Department of Physics Harbin Institute of TechnologyHarbin 150001China

Ti3C2Tx nanosheet,the first synthesized MXene with high capacity performance and charge/discharge rate,has attracted increasingly attention in renewable energy storage *** performing systematic density functional theory calculations,the theoretical capacity of the intrinsic structure of single-and multi-layered Ti3C2T2(T=F or O)corresponding to M(M=Li and Na)atoms are *** volumetric capacity and gravimetric capacity are obtained,which are related to the stacking *** optimal ratios of capacity to structure are determined under different stacking degrees for understanding the influence of surface functional groups on energy storage *** performance can be tuned by performing surface modification and increasing the interlayer *** addition,the reason for theoretical capacity differences of M atoms is analyzed,which is attributed to difference in interaction between the M-ions and substrate and the difference in electrostatic exclusion between adsorbed *** results provide an insight into the understanding of the method of efficiently increasing the energy storage performance,which will be useful for designing and using high performance electrode materials.

关键词： density functional theory MXene electrode materials

DYNAMIC NMR STUDIES ON [Li(2D)][Nd(η~3-C_3H_5)_4]

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Chinese Chemical Letters 1993年第2期4卷 187-188页

作者： Feng Fu LI xi tian zhang Ying Tai JIN Feng Kui PEI Changchun Institute of Applied Chemistry Academia Sinica Changchun130022

The dynamic ~1H and ^(13)C-NMR studies on [Li(2D)][Nd(η~8-C_3H_5)_4] (D=dioxane)were reported The four allyls coordinated to Hd^(8+) ion are equivalent and hydrogens appear as three groups in ~1H-NMR spectra with their chemical shifts changing with temperature.C_1 and Ca are equivalent showing the characteristic of η~2=-*** paramagnetic shifts of carbons in allyls induced by Nd^(2+) ere separated sucessfully.C_1 and C_3 located on the zero-dipolar *** content of contact shift is greater than that of dipolar slift to Co.

关键词： NMR C3H5 DYNAMIC NMR STUDIES ON Li Nd

DYNAMIC NMR STUDIES ON [Li（3D）] [La（η3-C3H5）4]

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Chinese Chemical Letters 1994年第5期 393-394页

作者： Feng Fu LI Ying Tai JIN xi tian zhang Feng Kui PEI (Changchun Institute of Applied Chemistry, Chinese Academy of Sciences,Changchun, 130022)

ＹＮＡＭＩＣＮＭＲＳＴＵＤＩＥＳＯＮ［Ｌｉ（３Ｄ）］［Ｌａ（η３－Ｃ３Ｈ５）４］￥ＦｅｎｇＦｕＬＩ；ＹｉｎｇＴａｉＪＩＮ；ＸｉＴｉａｎＺＨＡＮＧ；ＦｅｎｇＫｕｉＰＥＩ(ＣｈａｎｇｃｈｕｎＩｎｓｔｉｔｕｔｅｏｆＡｐｐｌ... 详细信息

ＹＮＡＭＩＣＮＭＲＳＴＵＤＩＥＳＯＮ［Ｌｉ（３Ｄ）］［Ｌａ（η３－Ｃ３Ｈ５）４］￥ＦｅｎｇＦｕＬＩ；ＹｉｎｇＴａｉＪＩＮ；ＸｉＴｉａｎＺＨＡＮＧ；ＦｅｎｇＫｕｉＰＥＩ(ＣｈａｎｇｃｈｕｎＩｎｓｔｉｔｕｔｅｏｆＡｐｐｌｉｅｄＣｈｅｍｉｓｔｒｙ，Ｃｈ...

关键词： NMR Li C3H5 DYNAMIC NMR STUDIES ON La

Interventional treatment experience in multiple injury with major abdominal or pelvic injuries： 160 cases analysis

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Chinese Journal of Traumatology 2018年第1期21卷 27-29页

作者： tian-xi zhang Mei Han Peng Ye Quan Hu Jia-Lin Li Ling Yin An-Yong Yu Department of Emergency The First Affiliated Hospital of Zunyi Medical College Zunyi 563003 Guizhou Province China

Purpose： To observe the therapeutic effect of interventional embolization and haemorrhage control in multiple trauma patients with a major abdominal or pelvic injury. Methods： Data of 160 multiple trauma patients with a major abdominal or pelvic injury were retro- spectively analyzed. They were admitted into the Department of Emergency of the First Affiliated Hospital of Zunyi Medical College from October 2013 to April 2016. Eighty-seven patients who received emergent intervention for embolization and haemorrhage control were set as group A, including 72 males and 15 females, with an average age of （39.32 ±14.0） years. Patients underwent emergent intervention for embolization and hemostasis. The other 73 patients who received traditional surgeries were set as group B, including 62 males and 11 females, with an average age of （38.48 ± 13.12） years. The time from admission to emergency intervention, the time of interventional embolization, transfusion during hospitalization, length of stay and prognosis were observed. The whole treatment and prognosis were compared between group A and group B. Results： In group A, the average time from admission to intervention exploration was （132.05 ± 86.80） min, the average operation time was （149 ± 49.69） min, the average hospitalization time was （18.37±4.71 ） days, the average amount of RBC transfusion during hospitalization was （Z2 ± 4.33） units, and the mortality was 4.60% （4 patients died）. The corresponding data in group B were respectively （138.95± 82.49） min, （183 ± 52.39） min, （22.72 ± 6.63） days, （12.23 ± 5.43） units, and 9.59% （7 cases died）. There was no statistical difference in the time from admission to operation between the two groups （p 〉 0.05）, but there was statistical difference in operation time, RBC transfusion, hospitalization time, prognosis, and mortality between the two groups （all p 〈 0.05）. Conclusion： The emergent intervention for embolization and haemorrhage control of multiple trauma patients with a m

关键词： Abdominal injury Multiple trauma Embolization Haemorrhage Prognosis

Influence of road types on road traffic accidents in northern Guizhou Province,China

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Chinese Journal of Traumatology 2021年第1期24卷 34-38页

作者： tian-Jing Sun Si-Jia Liu Fa ng-Ke xie xiao-Fei Huang Jian-xiu Tao Yuan-Lan Lu tian-xi zhang An-Yong Yu Department of Emergency the Affiliated Hospital of Zunyi Medical UniversityZunyi563003Guizhou ProvinceChina

Purpose The increasing number of deaths due to road traffic accidents(RTAs)has attracted global ***,the influence of road types is rarely considered in the study of *** study evaluates the influence of different road types in RTAs in northern Guizhou to provide a basis for the formulation of evidence-based policies and *** We obtained the data from the Zunyi Traffic Management Data Platform for the years 2009–*** mortality rates of RTAs were *** methods and Chi-square tests were used to analyze the characteristics of road traffic collisions on different road *** also examined the associations between the mortality rate per 10,000 vehicles and the growth of per capital gross domestic product(GDP)with Spearman’s rank correlation *** to the passing volume and the infrastructure,we defined different types of roads,like administrative road,functional road,general urban road and urban *** In 2012,the traffic mortality rate of administrative roads was 8.9 per 100,000 people,and the mortality rate of functional roads was 7.4 per 100,000 people,which decreased in 2018 to 6.1 deaths per 100,000 people and 5.2 deaths per 100,000 people,*** mortality rate per 10,000 vehicles reached the highest level in 2011(28.8 per 10,000 vehicles and 22.5 per 10,000 vehicles on administrative and functional roads,respectively).The death rate of county roads was the highest among administrative roads(χ^(2)=17.389,p<0.05)and that of fourth-class roads was the highest among functional roads(χ^(2)=21.785,p<0.05).The mortality rate per 10,000 vehicles was negatively correlated with per capital *** Although our research shows that RTAs in northern Guizhou have steadily declined in recent years,the range of decline is relatively *** measures and sustainable efforts are needed to control road traffic death and accelerate the progress in road traffic safety in northern Guizhou.

关键词： Road traffic accidence Road types Treatment Injury prevention

Mannitol inhibits the proliferation of neural stem cell by a p38 mitogen-activated protein kinase-dependent signaling pathway

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Chinese Journal of Traumatology 2024年第1期27卷 42-52页

作者： Hai-Zhen Duan xin Zhou Quan Hu Meng-Long Liu Shu-Hong Wang Ji zhang Xu-Heng Jiang tian-xi zhang An-Yong Yu Department of Emergency Affiliated Hospital of Zunyi Medical UniversityZunyi563000Guizhou provinceChina Dazhou Vocational College of Chinese Medicine Dazhou635000Sichuan provinceChina Dachuan District Traditional Chinese Medicine Hospital Dazhou635000Sichuan provinceChina

Purpose:Mannitol is one of the first-line drugs for reducing cerebral edema through increasing the extracellular osmotic ***,long-term administration of mannitol in the treatment of cerebral edema triggers damage to neurons and *** that neural stem cell(NSC)is a subpopulation of main regenerative cells in the central nervous system after injury,the effect of mannitol on NSC is still *** present study aims to elucidate the role of mannitol in NSC ***:C57 mice were derived from the animal house of Zunyi Medical University.A total of 15 pregnant mice were employed for the purpose of isolating NSCs in this ***,mouse primary NSCs were isolated from the embryonic cortex of mice and subsequently identified through immunofluorescence *** order to investigate the impact of mannitol on NSC proliferation,both cell counting kit-8 assays and neurospheres formation assays were *** vitro effects of mannitol were examined at various doses and time *** order to elucidate the role of Aquaporin 4(AQP4)in the suppressive effect of mannitol on NSC proliferation,various assays including reverse transcription polymerase chain reaction,western blotting,and immunocytochemistry were conducted on control and mannitol-treated ***,the phosphorylated p38(p-p38)was examined to explore the potential mechanism underlying the inhibitory effect of mannitol on NSC ***,to further confirm the involvement of the p38 mitogen-activated protein kinase-dependent(MAPK)signaling pathway in the observed inhibition of NSC proliferation by mannitol,SB203580 was *** data were analyzed using SPSS 20.0 software(SPSS,Inc.,Chicago,IL).The statistical analysis among multiple comparisons was performed using one-way analysis of variance(ANOVA),followed by Turkey’’s post hoc test in case of the data following a normal distribution using a Shapiro-Wilk normality *** betwe

关键词： Mannitol Cerebral edema Neural stem cell Proliferation AQP4 p38 MAPK signaling pathway

类风湿关节炎患者血清IL-37和可溶性PD-1分子的表达水平及临床意义

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中国免疫学杂志 2017年第3期33卷 422-425页

作者：陈栖栖田娟张晶苏江四川省医学科学院.四川省人民医院风湿免疫科成都610072

目的:通过研究类风湿关节炎(RA)患者血清IL-37和可溶性PD-1分子的表达水平,初步探讨其与RA的相关性以及临床意义。方法:收集RA患者及对照组人群的外周血,然后采用酶联免疫吸附法(ELISA)检测30例RA患者(RA标准评分≥6)和30名健康对照组... 详细信息

目的:通过研究类风湿关节炎(RA)患者血清IL-37和可溶性PD-1分子的表达水平,初步探讨其与RA的相关性以及临床意义。方法:收集RA患者及对照组人群的外周血,然后采用酶联免疫吸附法(ELISA)检测30例RA患者(RA标准评分≥6)和30名健康对照组血清中IL-37、s PD-1的表达水平,结合分析两组人群外周血IL-18、IL-6和IL-18BP三种细胞因子的表达,并通过Pearson相关分析其相关性。结果:经ELISA检测发现,RA组患者外周血中IL-37和s PD-1以及其他几种炎症相关细胞因子IL-18、IL-18BP、IL-6的表达水平均高于健康对照组(P<0.05);且IL-37与细胞因子IL-18、IL-18BP、IL-6均呈正相关,s PD-1仅与细胞因子IL-6呈正相关,IL-37、s PD-1均与患者病情程度评分呈正相关。结论:IL-37、s PD-1在RA患者中表达水平升高,且与其他炎性细胞因子及疾病严重程度具有相关性,两者在RA的进展中可能发挥着重要的调控作用,为今后RA治疗提供新的依据。

关键词：类风湿关节炎白介素-37 可溶性PD-1 细胞因子