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Chemical Research in Chinese Universities 2014年第6期30卷 1044-1046页

作者： zhang xuan LI Xudong MA Lixia College of Chemistry Chemical Engineering & Biotechnology Donghua University Shanghai 201620 P. R. China

Flowerlike supramolecular architectures were fabricated from fulleropyrrolidincs bearing a small para-, meta-, or ortho-nitrophenyl group. The self-assembled architectures were characterized by scanning electron micro-scopy（SEM） and X-ray diffraction（XRD）. It was found that these flowerlike architectures were assembled from na- noplatcs that formed from fundamental subunit of interdigitated lamellar bilayer structure.

关键词： Fullerene: Self-assembly: Flowerlike architecture

CXCR4 and CXCR5 orchestrate dynamic germinal center reactions and may contribute to the pathogenesis of systemic lupus erythematosus

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Cellular & Molecular Immunology 2019年第8期16卷 724-726页

作者： Bing-xuan Wu Li-dan Zhao xuan zhang Department of Rheumatology and Clinical Immunology Clinical Immunology CenterMedical Epigenetics Research CenterChinese Academy of Medical Sciences(CAMS)&Peking Union Medical College Hospital100730 BeijingChina

In a previous publication in Cellular and Molecular Immunology,Zhao et al.1 showed data from patients with treatment-naïve systemic lupus erythematosus(SLE),demonstrating the clinical significance and possible mechanisms of the aberrant expression of the chemokine receptor CXCR4 on lupus B *** this commentary,we will discuss the roles of CXCL12-CXCR4 and CXCL13-CXCR5 pairs and related signaling pathways in guiding dynamic germinal center(GC)reactions and B cell selection and describe how their dysregulation may contribute to the pathogenesis of SLE.

关键词： CXCL12 CXCR4 lupus erythematosus

Addition of Allyltrimethylsilane to tert-Butanesulfinyl Imines Triggered by Tetra-n-butylammonium Fluoride

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Chinese Chemical Letters 2006年第8期17卷 1037-1040页

作者： Wan xuan zhang Xue Long HOU Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules Faculty of Chemistry and Material Science Hubei University Wuhan 430062 State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032

The addition of allyltrimethylsilane to tert-butanesulfinyl imines triggered by tetra-n-butylammonium fluoride （TBAF） in the presence of 4A molecular sieves has been studied, and homoallylsulfinamides were obtained ... 详细信息

关键词： Stereoselective addition tert-butanesulfinyl imines allyltrimethylsilane tetra-n-butylammonium fluoride.

Personal PM_(2.5)-bound PAH exposure and lung function in healthy office workers:A pilot study in Beijing and Baoding,China

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Journal of Environmental Sciences 2023年第11期133卷 48-59页

作者： xuan zhang Hao zhang Yan Wang Pengchu Bai Lulu zhang Yongjie Wei Ning Tang Graduate School of Medical Sciences Kanazawa UniversityKakuma-machiKanazawa 920-1192Japan School of Civil Engineering Architecture and EnvironmentHubei University of TechnologyWuhan 430068China Institute of Nature and Environmental Technology Kanazawa UniversityKakuma-machiKanazawa 920-1192Japan State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China Institute of Medical Pharmaceutical and Health SciencesKanazawa UniversityKakuma-machiKanazawa 920-1192Japan

The effect of short-term exposure to polycyclic aromatic hydrocarbons(PAHs)on the respiratory system among healthy residents is *** and Baoding are typical polluted cities in China,and there is little research on PAH exposure and its health effects at the individual *** healthy female office workers were recruited in urban Beijing and Baoding,China,in *** personal exposure to fine particulate matter(PM_(2.5))-bound PAHs and lung function were seasonally *** relationships between PAH exposure and lung function were determined by a generalized mixed linear *** were exposed to high levels of PAH,in which the benzo[a]pyrene(BaP)level(1.26 ng/m^(3))was over than Chinese national indoor standard(1 ng/m^(3)).All PAHs concentration was higher in winter than that in summer and *** benz[a]anthracene(BaA)and chrysene(Chr)exposure showed weak relations with decreased lung function,i.e.,a 0.58% and 0.73% decrease in peak expiratory flow at lag 2 day,respectively(p<0.05).PAHs may not be suitable exposure indicators for short-term change in lung *** findings highlight the importance of reducing PAH pollution for public respiratory health protection in heavy-polluted cities of *** pilot study also provides experience on personal PAH assessment such as estimation of the number of repeated measurements required,which is helpful to determine the relationship between PAH exposure and health effect.

关键词： Polycyclic aromatic hydrocarbons Personal exposure Lung function Exposure-response relationship

Understanding the Activity Performance of Comets 38P/Stephan-Oterma,64P/Swift-Gehrels and C/2017 M4(ATLAS)through Broadband Photometric Observations

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Research in Astronomy and Astrophysics 2024年第8期24卷 147-156页

作者： xuan zhang Jin-Zhong Liu Le-Tian Wang Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China

In this work,we report observations of three comets:38P/Stephan-Oterma,64P/Swift-Gehrels,and C/2017 M4(ATLAS),conducted with the Nanshan one-meter wide-field telescope in 2018 August and November,and *** extracted morphological features through image enhancement techniques and calculated the dust activity parameter,Afρ,along with dust mass loss rates and coma color indices using broadband photometric *** morphological analysis uncovered a spectrum of dust characteristics among the observed comets,ranging from a significant twisted structure in comet 38P/Stephan-Oterma’s coma to the regular coma envelope surrounding comet 64P/*** Afρvalues varied between 148.8±0.3 cm for 64P/Swift-Gehrels and1118.5±6.2 cm for C/2017 M4(ATLAS)(measured within a reference aperture radius ofρ=6″),indicating a range from moderate to high activity *** mass loss rates were estimated from 328.1 kg s^(-1)for comet 64P/Swift-Gehrels to 1395.5 kg s^(-1)for comet C/2017 M4(ATLAS).The color indices of comets 38P/Stephan-Oterma and C/2017 M4(ATLAS)closely resemble the average colors of active short-period comets and active longperiod comets,*** contrast,64P/Swift-Gehrels exhibits a significantly bluer hue than typical Jupiter family comets.

关键词： comets general-comets individual(38P/Stephan-Oterma,64P/Swift-Gehrels,C/2017 M4(ATLAS))-techniques photometric

Knowledge mapping visualization analysis of the military health and medicine papers published in the Web of Science over the past 10 years

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Military Medical Research 2018年第2期5卷 129-139页

作者： xuan-ming zhang xuan zhang Xu Luo Hai-tao Guo Li-qun zhang Ji-wei Guo Southwest Hospital Third Military Medical UniversityChongqing 400038China Department of Clinical Laboratory Xinqiao HospitalThird Military Medical UniversityChongqing 400037China

Background:Military medicine is a research field that seeks to solve the medical problems that occur in modern war conditions based on public medicine ***:We explore the main research topics of military health and medical research in the Web of Science?core collection(Wo SCC)from 2007 to 2016,and the goal of this work is to serve as a reference for orientation and development in military health and *** on Cite Space III,a reference co-citation analysis is performed for 7921 papers published in the Wo SCC from 2007 to *** addition,a cluster analysis of research topics is performed with a comprehensive analysis of high-yield authors,outstanding research institutions and their cooperative ***:Currently,the research topics in military health and medicine mainly focus on the following seven aspects:mental health diagnoses and interventions,an army study to assess risk and resilience in service members(STARRS),large-scale military action,brain science,veterans,soldier parents and children of wartime,and wound *** also observed that the annual publication rate increased with *** S,Greenberg N,Fear NT,Smith TC,Smith B,Jones N,Ryan MAK,Boyko EJ,Hull L,and Rona RJ were the top 10 authors in military health and medicine *** top 10 institutes were the Uniformed Services University of the Health Sciences,the United States Army,the United States Navy,Kings College London,Walter Reed National Military Medical Center,Boston University,Walter Reed Army Institute of Research,Walter Reed Army Medical Center,Naval Health Research Center,and the VA Boston Healthcare ***:We are able to perform a comprehensive analysis of studies in military health and medicine research and summarize the current research climate and the developmental trends in the Wo ***,further studies and collaborations are needed ***,our findings provide valuable information and new perspectives and shape future resear

关键词： Military health Military medicine Knowledge mapping Cite Space

Sulfur-modified nickel selenide as an efficient electrocatalyst for the oxygen evolution reaction

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Journal of Energy Chemistry 2021年第11期30卷 198-203,I0005页

作者： Kai Wan Jiangshui Luo xuan zhang Palaniappan Subramanian Jan Fransaer Department of Materials Engineering KU LeuvenLeuven 3001Belgium College of Materials Science and Engineering Sichuan UniversityChengdu 610065SichuanChina

The sluggish four-electron transfer of the oxygen evolution reaction(OER)limits the performance of water ***,OER electrocatalysts based on earth-abundant elements are urgently *** doping has been an efficient approach to boost the intrinsic OER activity of the active sites by modifying the electronic ***,a simple anion substitution strategy is reported that increases the OER activity of nickel selenides via a one-step hydrothermal treatment of a metal–organic framework *** resulting S-substituted Ni_(3)Se_(4) nanoparticles display distortion of their crystal *** expected,the sulfur substitution modifies the electronic structure of Ni_(3)Se_(4) and leads to outstanding electrocatalytic *** the S-substituted Ni_(3)Se_(4) catalysts exhibit higher OER activities than the original Ni_(3)Se_(4).The optimized catalyst achieves a current density of 10 mA cm^(−2) at an overpotential of 275 mV with a Tafel slope of 64 mV dec^(−1) in 1.0 M *** addition to its electrochemical activity,the S-Ni_(3)Se_(4)-2 catalyst also exhibits good stability with only a 7.5%increase in overpotential at 50 mA cm^(−2) after 100 *** work demonstrates one strategy to modify the electronic structure of transition metal compounds by anion regulation.

关键词： Anion substitution Nickel selenide Electronic structure Oxygen evolution reaction

Numerical evaluation of segmental tunnel lining with voids in outside backfill

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Underground Space 2022年第5期7卷 786-797页

作者： Jia-xuan zhang Ning zhang Annan Zhou Shui-Long Shen Department of Civil Engineering School of Naval ArchitectureOceanand Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China MOE Key Laboratory of Intelligent Manufacturing Technology Department of Civil and Environmental EngineeringCollege of EngineeringShantou UniversityShantouGuangdong 515063China Discipline of Civil and Infrastructure School of EngineeringRoyal Melbourne Institute of Technology(RMIT)Victoria 3001Australia

This paper presents a numerical investigation of the mechanical behaviour of segmental linings owing to the existence of voids in the composite *** composite lining was formed by mining outside and shield tunnelling inside with backfill in *** element method was conducted to analyse the axial forces and bending moment for voids of different diameters at different *** results show that the axial forces in the transverse section increase near the crown and then invert and decrease on the left and right sides with an increase in the void centre angle(β)measured from the vertical *** increase in void diameter(d<300 mm)induces an increase in the axial force on the left and right sides when β=45°and 90°,while it decreases near the crown and *** occurrence of voids leads to an increase in the bending moment in the entire segment section with an angle β.

关键词： Jointly constructed tunnel Composite lining Voids Axial force Bending moment

Soliton molecules for combined mKdV-type bilinear equation

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Communications in Theoretical Physics 2023年第10期75卷 1-9页

作者： zhang-xuan Zhao Lu-Wei zhang Wei Yang Xue-Ping Cheng School of Information Engineering Zhejiang Ocean UniversityZhoushan 316022China Key Laboratory of Oceanographic Big Data Mining&Application of Zhejiang Province Zhoushan 316022China

Starting from the multi-soliton solutions obtained by the Hirota bilinear method,the soli ton molecule structures for the combined mKdV-type bilinear equation(Dt+∑n=1NαnDx2n+1)f*·f=0 are investigated using the velocity resonance *** two-soliton molecules of the mKdV-35 equation and the three-soliton molecules of the mKdV-357 equation are specifically demonstrated in this *** particular selections of the involved arbitrary parameters,especially the wave numbers,it is confirmed that,besides the usual multi-bright soliton molecules,the multi-dark soliton molecules and the mixed multibright-dark soliton molecules can also be *** addition,we discuss the existence of the multi-soliton molecules for the combined mKdV-type bilinear equation with more higher order nonlinear terms and *** results demonstrate that when N≥4,the combined mKdVtype bilinear equation no longer admits soliton molecules comprising more than four solitons.

关键词： soliton molecule combined mKdV-type bilinear equation Hirota bilinear method velocity resonance mechanism

The effect of betaine surfactants on the association behavior of associating polymer

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Petroleum Science 2021年第5期18卷 1441-1449页

作者： Ji-Jiang Ge Tian-Ci zhang Yi-Ping Pan xuan zhang College of Petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongChina

The interfacial properties and rheological behavior of surfactant/polymer complex systems were measured to investigate the association behavior of the associating *** with the pure surfactant solution,there are two inflection points in the surface tension curve for the surfactant/polymer complex *** two inflection points are dependent on the surfactant type and polymer *** effect of surfactant on the rheological behavior of polymer can be divided into two ***,the addition of short-chain betaine surfactant is detrimental to the viscosity of polymer solution due to the electrostatic shielding ***,long-chain betaine surfactant also reduces the viscosity of polymer solutions at low ***,when the concentration of the long-chain betaine surfactant is relatively high,the long-chain betaine surfactant could form worm-like micelles that promote the intermolecular association and thus increase the number of associating junctions,thereby resulting in the augmentation of *** it is necessary to apply the long-chain betaine surfactant to build the polymer/surfactant flooding *** interaction model between surfactant and polymer is proposed,which is different from the traditional‘Three-Region Model’.

关键词： Betaine surfactant Associating polymer Surface tension Viscosity Intermolecular association