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Dual in-situ observation of tribochemical and morphological evolution of single-layer WS_(2)and multi-layer WS_(2)/C coatings

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Friction 2024年第7期12卷 1580-1598页

作者： yuzhen LIU Jae-Ho HAN Shusheng xu Young Chan JUNG Dae-Eun KIM State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Department of Mechanical Engineering Yonsei UniversitySeoul03722Republic of Korea Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai Yantai 264000China Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering Yantai 264000China

The outstanding tribological performance of transition metal dichalcogenides(TMDs)is attributed to their unique sandwich microstructure and low interlayer shear *** advantageous structure allows TMDs to demonstrate exceptional friction reduction ***,the incorporation of TMDs and amorphous carbon(a-C)in multi-layer structures shows excellent potential for further enhancing tribological and anti-oxidation *** carbon,known for its high ductility,chemical inertness,and excellent wear resistance,significantly contributes to the overall performance of these multi-layer *** gain an in-depth understanding of the tribological mechanism and evolution of TMDs’multi-layer coatings,a dual in-situ analysis was carried out using a tribometer equipped with a 3D laser microscope and a Raman *** innovative approach allowed for a comprehensive evolution of the tribological,topographical,and tribochemical characteristics of both single-layer WS_(2)and multi-layer WS_(2)/C coatings in real *** findings from the dual in-situ tribotest revealed distinct failure characteristics between the single-layer WS_(2)coating and the multi-layer WS_(2)/C *** single-layer WS_(2)coating predominantly experienced failure due to mechanical removal,whereas a combination of mechanical removal and tribochemistry primarily influenced the failure of the multi-layer WS_(2)/C *** tribological evolution process of these two coatings can be classified into four stages on the basis of their tribological behavior:the running-in stage,stable friction stage,re-deposition stage,and lubrication failure *** stage represents a distinct phase in the tribological behavior of the coatings and contributes to our understanding of their behavior during sliding.

关键词： In-situ analysis multi-layer coating tribology tribochemistry

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The pivotal role of microglia in injury and the prognosis of subarachnoid hemorrhage

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Neural Regeneration Research 2025年第7期20卷 1829-1848页

作者： Wenjing Ning Shi Lv Qian Wang yuzhen xu Department of Rehabilitation The Second Affiliated Hospital of Shandong First Medical UniversityTaianShandong ProvinceChina Department of Central Laboratory The Affiliated Taian City Central Hospital of Qingdao UniversityTaianShandong ProvinceChina

Subarachnoid hemorrhage leads to a series of pathological changes,including vascular spasm,cellular apoptosis,blood–brain barrier damage,cerebral edema,and white matter ***,which are the key immune cells in the central nervous system,maintain homeostasis in the neural environment,support neurons,mediate apoptosis,participate in immune regulation,and have neuroprotective *** evidence has shown that microglia play a pivotal role in the pathogenesis of subarachnoid hemorrhage and affect the process of injury and the prognosis of subarachnoid ***,microglia play certain neuroprotective roles in the recovery phase of subarachnoid *** approaches aimed at modulating microglia function are believed to attenuate subarachnoid hemorrhage *** provides new targets and ideas for the treatment of subarachnoid ***,an in-depth and comprehensive summary of the role of microglia after subarachnoid hemorrhage is still *** review describes the activation of microglia after subarachnoid hemorrhage and their roles in the pathological processes of vasospasm,neuroinflammation,neuronal apoptosis,blood–brain barrier disruption,cerebral edema,and cerebral white matter *** also discusses the neuroprotective roles of microglia during recovery from subarachnoid hemorrhage and therapeutic advances aimed at modulating microglial function after subarachnoid ***,microglia in subarachnoid hemorrhage are targeted with TLR inhibitors,nuclear factor-κB and STAT3 pathway inhibitors,glycine/tyrosine kinases,NLRP3 signaling pathway inhibitors,Gasdermin D inhibitors,vincristine receptorαreceptor agonists,ferroptosis inhibitors,genetic modification techniques,stem cell therapies,and traditional Chinese ***,most of these are still being evaluated at the laboratory *** clinical studies and data on subarachnoid hemorrhage are required to improve the treatment of subarachnoid hemor

关键词： apoptosis blood–brain barrier brain edema microglia neuroinflammation neuron neuroprotection subarachnoid hemorrhage vasoconstriction white matter injury

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Boron-doped high-entropy oxide toward high-rate and long-cycle layered cathodes for wide-temperature sodium-ion batteries

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Journal of Energy Chemistry 2024年第8期95卷 577-587,I0012页

作者： yuzhen Dang Zhe xu Yurong Wu Runguo Zheng Zhiyuan Wang Xiaopin Lin Yanguo Liu Zheng-Yao Li Kai Sun Dongfeng Chen Dan Wang School of Materials Science and Engineering Northeastern UniversityShenyang 110819LiaoningChina School of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao 066004HebeiChina Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province Qinhuangdao 066004HebeiChina Neutron Scattering Laboratory Department of Nuclear PhysicsChina Institute of Atomic EnergyBeijing 102413China

03-type layered metal oxides hold great promise for sodium-ion batteries cathodes owing to their energy density ***,the severe irreversible phase transition and sluggish Na^(+)diffusion kinetics pose significant challenges to achieve high-performance layered ***,a boron-doped03-type high entropy oxide Na(Fe_(0.2)Co_(0.15)Cu_(0.05)Ni_(0.2)Mn_(0.2)Ti_(0.2))B_(0.02)O_(2)(NFCCNMT-B_(0.02))is designed and the covalent B-O bonds with high entropy configuration ensure a robust layered *** obtained cathode NFCCNMT-B_(0.02)exhibits impressive cycling performance(capacity retention of 95%and 82%after100 cycles and 300 cycles at 1 and 10 C,respectively)and outstanding rate capability(capacity of 83 mAh g^(-1)at 10 C).Furthermore,the NFCCNMT-B_(0.02)demonstrates a superior wide-temperature performance,maintaining the same capacity level(113,4 mAh g^(-1)@-20℃,121 mAh g^(-1)@25℃,and 119 mAh g^(-1)@60℃)and superior cycle stability(90%capacity retention after 100 cycles at 1 C at-20℃).The high-entropy configuration design with boron doping strategy contributes to the excellent sodium-ion storage *** high-entropy configuration design effectively suppresses irreversible phase transitions accompanied by small volume changes(ΔV=0.65 A3).B ions doping expands the Na layer distance and enlarges the P3 phase region,thereby enhancing Na^(+)diffusion *** work offers valuable insights into design of high-performance layered cathodes for sodium-ion batteries operating across a wide temperature.

关键词： High entropy oxide Born substitution Phase transition Na~+diffusion kinetics Sodium-ion batteries

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Boosting MA-based two-dimensional Ruddlesden-Popper perovskite solar cells by incorporating a binary spacer

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Journal of Energy Chemistry 2024年第8期95卷 348-356,I0008页

作者： xue Dong Yinhao Tang Yiqun Li Xin Li yuzhen Zhao Wenqi Song Fangmin Wang Shudong xu Yipeng Zhou Chenxin Ran Zongcheng Miao Lin Song Zhongbin Wu Xi’an Key Laboratory of Advanced Photo-Electronics Materials and Energy Conversion Device Technological Institute of Materials&Energy Science(TIMES)Xijing UniversityXi’an 710123ShaanxiChina Frontiers Science Center for Flexible Electronics Xi’an Institute of Flexible Electronics(IFE)Northwestern Polytechnical UniversityXi'an 710072ShaanxiChina School of Artificial Intelligence Optics and Electronics(iOPEN) Northwestern Polytechnical UniversityXi'an 710072ShaanxiChina

Two-dimensional Ruddlesden-Popper(2DRP)perovskite exhibits excellent stability in perovskite solar cells(PSCs)due to introducing hydrophobic long-chain organic ***,the poor charge transporting property of bulky organic cation spacers limits the performance of 2DRP *** by the Asite cation alloying strategy in 3D perovskites,2DRP perovskites with a binary spacer can promote charge transporting compared to the unary spacer ***,the superior MA-based 2DRP perovskite films with a binary spacer,including 3-guanidinopropanoic acid(GPA)and 4-fluorophenethylamine(FPEA)are *** films(GPA_(0.85)FPEA_(0.15))_(2)MA_(4)Pb_5I_(16)show good morphology,large grain size,decreased trap state density,and preferential orientation of the as-prepared ***,the present 2DRP-based PSC with the binary spacer achieves a remarkable efficiency of 18.37%with a V_(OC)of1.15 V,a J_(SC)of 20.13 mA cm^(-2),and an FF of 79.23%.To our knowledge,the PCE value should be the highest for binary spacer MA-based 2DRP(n≤5)PSCs to ***,owing to the hydrophobic fluorine group of FPEA and the enhanced interlayer interaction by FPEA,the unencapsulated 2DRP PSCs based on binary spacers exhibit much excellent humidity stability and thermal stability than the unary spacer counterparts.

关键词： Perovskite solar cells Two-dimensional Ruddlesden-Popper perovskite Binary spacers Stability

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校本课程开发二十年:一项教师生活史研究

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华东师范大学学报（教育科学版） 2024年第10期42卷 110-126页

作者：徐玉珍首都师范大学教育学院北京100048

运用生活史研究的方法,通过田野观察和深度访谈,采集教师们的课程开发故事,并将他们的故事放入到他们所处学校的、社区的及国家的社会大背景中加以历史地考察。同时,通过并置、对照和比较他们的个人课程开发故事,构建一幅有关“校本课... 详细信息

运用生活史研究的方法,通过田野观察和深度访谈,采集教师们的课程开发故事,并将他们的故事放入到他们所处学校的、社区的及国家的社会大背景中加以历史地考察。同时,通过并置、对照和比较他们的个人课程开发故事,构建一幅有关“校本课程开发”乃至更广的课程改革“马赛克”式生活史图景。与单纯的文献史不同,这是一种微观至中观层面上的课程史建构的努力和尝试,是一种“叙事性”的历史“真实”。回顾“三级”课程管理政策推动的“校本课程开发”二十年(2001—2021),追问:校本课程开发的实践主体——学校教师——是如何卷入到二十年前的那个改革的大潮中去的?经历了怎样的课程开发过程?产生了什么样的认识和体验?对这场主要由改革专家“理论”、政府推动的自上而下的课程改革的认同度有多高?这些追问不仅涉及到“过去了”的二十年,更关系到未来的二十年、三十年,关系到他们面对未来政府和专家推动新新课程改革的参与度、支持度、行动力和认知力。

关键词：校本课程开发教师课外活动生活史研究课程史

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上市公司境外直接投资与应计盈余管理——基于会计准则国际趋同视角

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会计研究 2024年第2期 24-37页

作者：徐经长苏聿桢中国人民大学商学院

基于A股上市公司2007—2017年的数据，研究境外直接投资如何影响应计盈余管理。研究发现：当东道国采用趋同IFRS的会计准则时，境外直接投资能够显著降低应计盈余管理水平；当东道国未采用趋同IFRS的会计准则时上述关系并不显著。进一... 详细信息

基于A股上市公司2007—2017年的数据，研究境外直接投资如何影响应计盈余管理。研究发现：当东道国采用趋同IFRS的会计准则时，境外直接投资能够显著降低应计盈余管理水平；当东道国未采用趋同IFRS的会计准则时上述关系并不显著。进一步研究发现：出于市场与效率寻求动因的境外直接投资对应计盈余管理水平的影响更显著；东道国会计准则趋同从内部代理冲突和外部信息环境两个角度缓解了境外直接投资带来的信息不对称问题；投资于会计准则趋同东道国降低正向应计盈余管理的效果比降低负向应计盈余管理的效果更强；投资于会计准则趋同的东道国对企业总体真实盈余管理水平没有显著影响，但与通过销售操纵进行的真实盈余管理存在显著负向关系。本文的研究结论鼓励监管机构和资本市场支持上市公司在完善公司治理机制的基础上合理开展境外直接投资活动。

关键词：境外直接投资盈余管理会计准则国际趋同国际化动因

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Impacts of Nutlin-3a and exercise on murine double minute 2-enriched glioma treatment

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Neural Regeneration Research 2025年第4期20卷 1135-1152页

作者： Yisheng Chen Zhongcheng Fan Zhiwen Luo xueran Kang Renwen Wan Fangqi Li Weiwei Lin Zhihua Han Beijie Qi Jinrong Lin Yaying Sun Jiebin Huang yuzhen xu Shiyi Chen Department of Sport Medicine Huashan HospitalFudan UniversityShanghaiChina Department of Orthopedic Surgery Hainan Province Clinical Medical CenterHaikou Affiliated Hospital of Central South University Xiangya School of MedicineHaikouHainan ProvinceChina Department of Basic Medicine Shanghai Jiao Tong University School of MedicineShanghai Jiao Tong UniversityShanghaiChina Department of Neurosurgery Second Affiliated Hospital of Zhejiang University School of MedicineZhejiang UniversityHangzhouZhejiang ProvinceChina Department of Orthopedics Shanghai General HospitalSchool of Medicine Shanghai Jiao Tong UniversityShanghaiChina Department of Infectious Diseases Children’s Hospital of Fudan UniversityNational Children’s Medical CenterShanghaiChina Department of Rehabilitation The Second Affiliated Hospital of Shandong First Medical UniversityTaianShandong ProvinceChina

Recent research has demonstrated the impact of physical activity on the prognosis of glioma patients,with evidence suggesting exercise may reduce mortality risks and aid neural *** role of the small ubiquitin-like modifier(SUMO)protein,especially post-exercise,in cancer progression,is gaining attention,as are the potential anti-cancer effects of *** used machine learning to create the exercise and SUMO-related gene signature(ESLRS).This signature shows how physical activity might help improve the outlook for low-grade glioma and other *** demonstrated the prognostic and immunotherapeutic significance of ESLRS markers,specifically highlighting how murine double minute 2(MDM2),a component of the ESLRS,can be targeted by *** underscores the intricate relationship between natural compounds such as nutlin-3 and immune *** comprehensive CRISPR screening,we validated the effects of specific ESLRS genes on low-grade glioma *** also revealed insights into the effectiveness of Nutlin-3a as a potent MDM2 inhibitor through molecular docking and dynamic ***-3a inhibited glioma cell proliferation and activated the p53 *** efficacy decreased with MDM2 overexpression,and this was reversed by Nutlin-3a or *** using a low-grade glioma mouse model highlighted the effect of physical activity on oxidative stress and molecular pathway ***,both physical exercise and Nutlin-3a administration improved physical function in mice bearing tumors derived from MDM2-overexpressing *** results suggest the potential for Nutlin-3a,an MDM2 inhibitor,with physical exercise as a therapeutic approach for glioma *** research also supports the use of natural products for therapy and sheds light on the interaction of exercise,natural products,and immune regulation in cancer treatment.

关键词： exercise and SUMO-related gene signatures(ESLRS) glioblastoma management low-grade glioma natural bioactives neural regeneration physical exercise

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汽车座椅用抗菌涤纶针织物制备及其性能

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纺织学报 2024年第6期45卷 127-133页

作者：李倩倩郭晓玲崔文豪许宇真王林峰西安工程大学纺织科学与工程学院陕西西安710048

为解决汽车座椅用涤纶针织物耐久性抗菌问题,以钛酸四丁酯为钛源、硼酸和尿素为掺杂体,采用快速溶胶-凝胶浸渍负载法,通过优化工艺制备出负载硼氮共掺杂纳米二氧化钛(B-N-TiO_(2))抗菌剂的涤纶针织物。在模拟日光照射条件下采用振荡法... 详细信息

为解决汽车座椅用涤纶针织物耐久性抗菌问题,以钛酸四丁酯为钛源、硼酸和尿素为掺杂体,采用快速溶胶-凝胶浸渍负载法,通过优化工艺制备出负载硼氮共掺杂纳米二氧化钛(B-N-TiO_(2))抗菌剂的涤纶针织物。在模拟日光照射条件下采用振荡法测试抗菌涤纶针织物对大肠杆菌和金黄色葡萄球菌的抗菌性能。分析抗菌剂的光谱性质和微观形貌,并测试织物的断裂强力、耐磨性能、拒水性能等。结果表明:当浸渍时间为5 min、焙烘温度为120℃、焙烘时间为15 min时,所制抗菌涤纶针织物对大肠杆菌和金黄色葡萄球菌的抑菌率分别为98.4%和94.4%,其主要性能均符合相关标准要求;经20次洗涤后,其纤维表面仍包覆有大量抗菌剂,且抑菌率分别为91.8%和91.3%,抗菌耐久性优于AA级。

关键词：硼氮共掺杂纳米二氧化钛汽车内饰纺织品涤纶针织物抗菌整理功能性纺织品

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IL-17信号通路在高原低氧诱导小鼠脾脏炎症反应的作用机制

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四川大学学报（医学版） 2024年第1期55卷 118-124页

作者：永胜郭玉静陈晓晨许玉珍胡英青海大学医学院基础医学部免疫学教研室西宁810016

目的探究高原低氧环境诱导小鼠脾脏组织炎症反应发生的作用机制。方法将C57BL/6小鼠随机分为平原常氧组和高原低氧组,每组5只。其中,平原常氧组饲养于海拔400 m(氧浓度19.88%)常氧浓度环境,高原低氧组小鼠置于海拔4200 m(氧浓度14.23%)... 详细信息

目的探究高原低氧环境诱导小鼠脾脏组织炎症反应发生的作用机制。方法将C57BL/6小鼠随机分为平原常氧组和高原低氧组,每组5只。其中,平原常氧组饲养于海拔400 m(氧浓度19.88%)常氧浓度环境,高原低氧组小鼠置于海拔4200 m(氧浓度14.23%)高原环境,构建高原低氧动物模型。第30天取脾脏组织检测脾脏指数,HE染色观察小鼠脾脏组织病理学改变,实时荧光定量PCR(RT-qPCR)和Western blot检测小鼠脾脏组织白细胞介素(IL)-6、IL-12、IL-1β的mRNA和蛋白表达量;使用RNA测序(RNA-sequencing,RNA-seq)技术进行高通量转录组学测序,将差异表达基因(differentially expressed genes,DEGs)进行KEGG富集分析,对关键通路中的DEGs进行RT-qPCR验证。结果与平原常氧组相比,高原低氧环境下,小鼠脾脏指数降低(P<0.05),并出现白髓减少,生发中心扩大,边缘模糊,静脉充血等病理学改变;高原低氧组小鼠脾脏组织IL-6、IL-12、IL-1β的mRNA和蛋白表达量均上调(P<0.05)。经转录组测序,KEGG通路富集分析示,4218个DEGs共富集到178个富集通路(P<0.05),DEGs在T细胞受体信号通路、TNF信号通路和IL-17信号通路等多个与免疫、炎症相关通路中显著富集(P<0.05);其中,IL-17信号通路和下游炎症因子高度上调表达(P<0.05);与平原常氧组相比,高原低氧组小鼠脾脏组织IL-17信号通路中关键基因IL-17、IL-17R、MAPKs(mitogen-activated protein kinase genes)等和下游炎症因子MMP9(matrix metallopeptidase 9)、S100A8(S100 calcium binding protein A8 gene)、S100A9(S100 calcium binding protein A9 gene)、肿瘤坏死因子-α(tumour necrosis factorα,TNF-α)等基因的mRNA表达量均出现上调或下调差异表达(P<0.05)。经RT-qPCR验证,DEGs的mRNA表达量与RNA-seq结果一致。结论高原低氧环境可通过激活IL-17信号通路,促进下游炎症因子释放,诱导小鼠脾脏组织炎症反应发生。

关键词：高原低氧转录组学 IL-17信号通路脾脏组织炎症 RNA测序生物信息学

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一位资深初中英语教师专业认同形成的生活史研究

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基础外语教育 2024年第3期26卷 27-34,17,109页

作者：李健莉徐玉珍首都师范大学教育学院

本研究采用生活史研究方法,以温格的实践共同体理论为框架,剖析了一位资深初中英语教师的成长故事,探究了其专业认同的特点和形成过程。研究发现,面对英语课程改革与学校教师考评压力,个案教师形成了情景性专业认同,表现为既赞同课程改... 详细信息

本研究采用生活史研究方法,以温格的实践共同体理论为框架,剖析了一位资深初中英语教师的成长故事,探究了其专业认同的特点和形成过程。研究发现,面对英语课程改革与学校教师考评压力,个案教师形成了情景性专业认同,表现为既赞同课程改革的育人理念,又习惯于传统的应试导向教学方式。情景性专业认同的形成过程凸显了课程改革理念和教师实践之间的矛盾,以及不同实践共同体在特定环境中意义流通的局限性。因此,本研究认为,课程改革的成功落地需要创建适宜各种共同体对话协商的生态环境,也需要教师形成促进学生核心素养发展且知行合一的专业认同。

关键词：初中英语教师专业认同生活史研究

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