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Science China(Physics,mechanics & Astronomy) 2024年第2期67卷 142-148页

作者： Zengfu Ou Jun Wang Jihai Zhang Yukang ding Shenwei Chen Wenya Zhai Jingcheng Li dingyong Zhong Donghui Guo School of Physics Sun Yat-sen UniversityGuangzhou 510275China Guangdong Provincial Key Laboratory of magnetoelectric Physics and Devices School of PhysicsSun Yat-sen UniversityGuangzhou 510275China State Key Laboratory of Optoelectronic materials and Technologies Sun Yat-sen UniversityGuangzhou 510275China College of Chemical engineering Zhejiang University of TechnologyHangzhou 310014China

Open-shell graphene nanostructures(GNs)are promising candidates for future spintronics and quantum *** progress based on on-surface synthetic approach has successfully created such GNs on metallic ***,the doping effect of metallic surfaces is inevitably present and can significantly tune their electronic and magnetic ***,we investigate the zigzag end states of open-shell 7-armchair graphene nanoribbons(7-AGNRs)on Au(111),Au(100)and Ag(111)*** with the manipulation of a scanning tunneling microscope,we demonstrate that the end states can be tuned from empty states to singly occupied states and to doubly occupied states by substrate ***,the singly occupied states can be finely tuned,with the occupancy number of the states and related magnetic behaviors uncovered by experiments at different temperatures and magnetic *** results provide a comprehensive study of the magnetic response of open-shell GNs on metallic surfaces at different doping levels.

关键词： open-shell graphene nanostructures magnetic response metallic substrate doping Kondo resonance scanning tunneling microscopy/spectroscopy

Unveiling the time-temperature dependence of metastability of supercooled liquid using nano-calorimetry

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Science China(Physics,mechanics & Astronomy) 2024年第3期67卷 119-127页

作者： Yijun ding Lijian Song Zheng Wang Ruiqi Yu Junqiang Wang Lina Hu Yuanzheng Yue edgar D.Zanotto Key Laboratory for Liquid-Solid Structural evolution and Processing of materials(ministry of education) Shandong University Jinan 250061China Ningbo Institute of materials Technology and engineering Chinese Academy of SciencesNingbo 315201China Key Laboratory of experimental Teratology Shandong University Jinan 250061 China Department of Chemistry and bioscience Aalborg UniversityAalborg 9220Denmark Department of materials engineering Federal University of Sao CarlosSao Carlos SP 13.565-905Brazil

There is a lack of understanding of both the conversion of an unstable glass into a metastable supercooled liquid(mSL) upon heating and the metastability of mSLs. In this study, we investigated the time-and temperature-dependent metastability of an mSL using an advanced nano-calorimetric technique. The chosen Au-based metallic glass(Au mG) allowed adequate probing of its mSL in a temperature range between 10 and 70 K above the standard glass transition temperature. We found that the survival time of the mSL state is a quadratic function of temperature. beyond this duration threshold, the sample undergoes fast crystallization even if it is below the crystallization temperature that is measured using differential scanning *** transmission electron microscopy, we observed the formation of clusters with a partially ordered lattice structure during relaxation in the Au mG sample fabricated using a nano-calorimeter. The atomic ordering within the clusters was enhanced by increasing time and temperature in the mSL region. Once the as-produced glass entered the mSL stage upon heating followed by a quenching stage at a given rate, the mechanical properties of the quenched glass remained the same regardless of its holding temperature and duration within the mSL region. This work provides insights into the glass-mSL-crystal transformation and offers guidance for designing standard metallic glasses for property characterizations.

关键词： metallic glass supercooled liquid relaxation nucleation nano calorimetric technology

High-precision nondestructive evaluation of a thermal barrier coating based on perovskite quantum dot anion exchange

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Nano Research 2024年第5期17卷 4582-4592页

作者： Tao Han Shufang ding Zifan Wang Sirong Jiang Pengjiang Jing Tianshang Yi Yaqi Chen Chunzhi Jiang Xiaofeng Zhang microelectronics and Optoelectronics Technology Key Laboratory of Hunan Higher education School of Physics and Electronic Electrical EngineeringXiangnan UniversityChenzhou 423000China National engineering Laboratory for modern materials Surface engineering Technology&The Key Lab of Guangdong for modern Surface engineering Technology Guangdong Institute of New MaterialsGuangdong Academy of SciencesGuangzhou 510650China

Thermal barrier coatings(TbCs)in gas turbine engines are used in expressly harsh environments;thus,assessing TbC integrity status is critical for safety and ***,traditional periodic maintenance involves visual inspections of the TbCs,requiring the gas turbine to be decommissioned and partially *** importantly,tiny defects or internal damages that easily cause coating failure cannot be *** this work,a new nondestructive evaluation(NDe)technique of TbCs based on quantum dot(QD)anion exchange is first explored *** exchanging anions between the Cl ions and the CsPbbr_(3) QDs,the degrees of salt corrosion of the TbCs are *** resultant NDe technique shows that the colour of the TbCs obviously changes from green to blue,accompanied by a large blueshift(~100 nm)of the photoluminescence(PL)peak *** addition,the relationship between the PL peak position and coating thermophysical properties indicates that the precision of this NDe technique may easily identify theμm-level of the thermal growth oxide(TGO)changes inside the TbCs.

关键词： thermal barrier coatings nondestructive evaluation CsPbbr_(3)quantum dot anion exchange thermal growth oxide

Clinical relevance of distolingual roots and periodontal status in mandibular first molars: a cross-sectional study employing CbCT analysis

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Journal of Zhejiang University-Science b(biomedicine & biotechnology) 2024年第3期25卷 244-253页

作者： Feifei mAO meng WANG Shuai ZHOU Yan ZHAO Jiaping HUANG Fengying YIN Haiping YANG Pei-hui ding Stomatology Hospital School of StomatologyZhejiang University School of MedicineZhejiang Provincial Clinical Research Center for Oral DiseasesKey Laboratory of Oral Biomedical Research of Zhejiang ProvinceCancer Center of Zhejiang UniversityHangzhou 310016China

Objectives:Distolingual root of the permanent mandibular first molar(PmFm-DLR)has been frequently reported,which may complicate the treatment of *** study aimed to assess the morphological features of PmFm-DLR and investigate the correlation between the morphological features of PmFm-DLR and periodontal status in patients with eastern Chinese ethnic *** and methods:A total of 836 cone beam computed tomography(CbCT)images with 1497 mandibular first molars were analyzed to observe the prevalence of PmFm-DLR at the patients and tooth levels in eastern *** them,complete periodontal charts were available for 69 Chinese patients with 103 *** and regression analyses were used to evaluate the correlation between the morphological features of DLR,bone loss,and periodontal clinical parameters,including clinical attachment loss(CAL),probing pocket depth(PPD),gingival recession(GR),and furcation involvement(FI).Results:The patient-level prevalence and tooth-level prevalence of DLR in mandibular first molars were 29.4%and 26.3%,*** linear regression analysis suggested that bone loss at the lingual site and CAL were negatively affected by the angle of separation between distolingual and mesial roots in the transverse section,while they were significantly influenced by age and the angle of separation between distobuccal and mesial roots in the coronal ***:The prevalence of PmFm-DLR in eastern China was relatively high in our *** morphological features of DLR were correlated with the periodontal status of mandibular first *** study provides critical information on the morphological features of DLR for improved diagnosis and treatment options of mandibular molars with DLR.

关键词： Distolingual root mandibular first molar Periodontal clinical parameter Clinical attachment loss Cone beam computed tomography(CbCT)

Network meta-analysis of combination strategies in metastatic hormone-sensitive prostate cancer

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Asian Journal of Andrology 2024年第4期26卷 402-408页

作者： Shan-Shan Wang Xiao-Jie bian Jun-Long Wu bei-He Wang Sheng Zhang ding-Wei Ye Department of Urology Fudan University Shanghai Cancer CenterShanghai 200032China Department of Oncology Shanghai Medical CollegeFudan UniversityShanghai 200032China Department of medical Oncology Fudan University Shanghai Cancer CenterShanghai 200032China.

This study compared different doublet and triplet therapies for efficacy and safety in metastatic hormone-sensitive prostate cancer(mHSPC).Pubmed,embASe,and the Cochrane Library were comprehensively searched for eligible randomized controlled trials(RCTs)published from inception to October *** included abiraterone,apalutamide,enzalutamide,docetaxel,darolutamide,and androgen deprivation therapy(ADT),either as doublet or triplet *** outcomes examined were overall survival(OS),progression-free survival(PFS),castration-resistant prostate cancer(CRPC)-free survival,time to symptomatic skeletal event(SSe),and *** surface under the cumulative ranking curve(SUCRA)was determined to identify the preferred *** RCTs were *** combination of darolutamide,docetaxel,and ADT had the highest SUCRA of 84.3 for OS,followed by combined abiraterone,docetaxel,and ADT(SUCRA=71.6).The highest SUCRAs for PFS were observed for triplet therapies(abiraterone,docetaxel,and ADT[SUCRA=74.9],followed by enzalutamide,docetaxel,and ADT[SUCRA=74.3])and other androgen receptor axis-targeted therapy-based doublet therapies(SUCRAs:26.5–59.3).Darolutamide,docetaxel,and ADT had the highest SUCRAs,i.e.,80.8 and 84.0 regarding CRPC-free survival and time to SSe,*** Grade>3 adverse events(Aes),the SUCRAs of triplet therapies(SUCRAs:14.8–31.5)were similar to that of docetaxel and ADT(SUCRA=39.5).Three studies had a low risk of bias in all categories;the remaining studies had at least an unclear risk of bias in at least one *** therapy demonstrated potentially enhanced effectiveness than doublet therapy in mHSPC,with acceptable safety *** might be the optimal option for triplet therapy in combination with docetaxel and ADT.

关键词： androgen antagonist androgen receptor antagonist docetaxel meta-analysis prostatic neoplasm

Amorphous Iridium Oxide-Integrated Anode electrodes with Ultrahigh material Utilization for Hydrogen Production at Industrial Current Densities

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Nano-micro Letters 2024年第10期16卷 225-239页

作者： Lei ding Kui Li Weitian Wang Zhiqiang Xie Shule Yu Haoran Yu David ACullen Alex Keane Kathy Ayers Christopher bCapuano Fangyuan Liu Pu-Xian Gao Feng-Yuan Zhang Department of mechanical Aerospace and Biomedical EngineeringUniversity of TennesseeKnoxvilleTN 37996USA Oak Ridge National Lab Center for Nanophase Materials SciencesOak RidgeTN 37831USA Nel Hydrogen WallingfordCT 06492USA Institute of materials Science University of ConnecticutStorrsCT 06269USA Department of materials Science and engineering University of ConnecticutStorrsCT 06269USA

Herein,ionomer-free amorphous iridium oxide(IrO_(x))thin electrodes are first developed as highly active anodes for proton exchange membrane electrolyzer cells(PemeCs)via low-cost,environmentally friendly,and easily scalable electrodeposition at room *** with a Nafion 117 membrane,the IrO_(x)-integrated electrode with an ultralow loading of 0.075 mg cm^(-2)delivers a high cell efficiency of about 90%,achieving more than 96%catalyst savings and 42-fold higher catalyst utilization compared to commercial catalyst-coated membrane(2 mg cm^(-2)).Additionally,the IrO_(x)electrode demonstrates superior performance,higher catalyst utilization and significantly simplified fabrication with easy scalability compared with the most previously reported ***,the remarkable performance could be mainly due to the amorphous phase property,sufficient Ir^(3+)content,and rich surface hydroxide groups in ***,due to the high activity,high cell efficiency,an economical,greatly simplified and easily scalable fabrication process,and ultrahigh material utilization,the IrO_(x)electrode shows great potential to be applied in industry and accelerates the commercialization of PemeCs and renewable energy evolution.

关键词： Ionomer-free Amorphous IrOx electrodes Ultrahigh material utilization Scalable electrodeposition Hydrogen production

GLObAL SOLUTIONS TO 1D COmPReSSIbLe NAVIeR-STOKeS/ALLeN-CAHN SYSTem WITH DeNSITY-DePeNDeNT VISCOSITY AND FRee-bOUNDARY

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Acta mathematica Scientia 2024年第1期44卷 195-214页

作者：丁时进李颖花王喻 School of mathematical Sciences South China Normal UniversityGuangzhou510631China

This paper is concerned with the Navier-Stokes/Allen-Cahn system,which is used to model the dynamics of immiscible two-phase *** consider a 1D free boundary problem and assume that the viscosity coefficient depends on the density in the form ofη(ρ)=ρ^(α).The existence of unique global H^(2m)-solutions(m∈N)to the free boundary problem is proven for when 0e obtain the global C^(∞)-solutions if the initial data is smooth.

关键词： Navier-Stokes/Allen-Cahn system density-dependent viscosity free boundary global solutions

A review on ultra-small undoped moS_(2) as advanced catalysts for renewable fuel production

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Carbon energy 2024年第2期6卷 92-112页

作者： Guoping Liu Lingling ding Yuxuan meng Ahmad Ali Guifu Zuo Xianguang meng Kun Chang Oi Lun Li Jinhua Ye Hebei Provincial Laboratory of Inorganic Nonmetallic materials College of Materials Science and EngineeringNorth China University of Science and TechnologyTangshanChina College of materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjingChina School of materials Science and engineering Pusan National UniversityBusanKorea International Center for materials Nanoarchitectonics(WPImANA) National Institute for Materials Science(NIMS)1-1 NamikiTsukubaIbarakiJapan

molybdenum disulfide(moS_(2))has garnered significant attention in the field of catalysis due to the high density of active sites in its unique two-dimensional(2D)structure,which could be developed into numerous high-performance *** synthesis of ultra-small moS2 particles(m)is highly desired in various experimental *** ultra-small structure could often lead to a distinct S-mo coordination state and nonstoichiometric composition in moSx,minimizing in-plane active sites of the 2D structure and making it probable to regulate the atomic and electronic structure of its intrinsic active sites on a large extent,especially in moSx *** article summarizes the recent progress of catalysis over ultra-small undoped moS_(2) particles for renewable fuel *** a systematic review of their synthesis,structural,and spectral characteristics,as well as the relationship between their catalytic performance and inherent defects,we aim to provide insights into catalysis over this matrix that may potentially enable advancement in the development of high-performance moS_(2)-based catalysts for sustainable energy generation in the future.

关键词： applications catalytic moS_(2) structure synthesis

The coupling control of biological precursors and environmental factors onβ-carotane enrichment in alkaline lacustrine source rocks:A case study from the Fengcheng formation in the western Junggar basin,NW China

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Petroleum Science 2024年第2期21卷 836-854页

作者： mao-Guo Hou ming Zha Hua Liu Hai-Lei Liu Jiang-Xiu Qu Ablimit Imin Xiu-Jian ding Zhong-Fa Jiang School of Geosciences China University of PetroleumQingdaoShandong266580China Research Institute of exploration and Development Xinjiang Petroleum Administration BureauKaramayXinjiang834000China

The organic-rich mudstones and dolostones of the Permian Fengcheng Formation(Fm.)are typically alkaline lacustrine source rocks,which are typified by impressively abundantβ-*** β-carotane has been well acknowledged as an effective indicator of biological sources or depositional ***,the specific biological sources of β-carotane and the coupling control of biological sources and environmental factors on the enrichment of β-carotane in the Fengcheng *** *** on a comprehensive investigation of the bulk,molecular geochemistry,and organic petrology of sedimentary rocks and the biochemistry of phytoplankton in modern alkaline lakes,we proposed a new understanding of the biological precursors of β-carotane and elucidated the enrichment mechanism of β-carotane in the Fengcheng *** results show that the biological precursors crucially control the enrichment of β-carotane in the Fengcheng *** haloalkaliphilic cyanobacteria are the primary biological sources of β-carotane,which is suggested by a good positive correlation between the 2-methylhopane index,7-+8-methyl heptadecanes/C_(max),C_(29%),and β-carotane/C_(max)in sedimentary rocks and the predominance of cyanobacteria with abundantβ-carotene in modern alkaline *** enrichment of β-carotane requires the reducing condition,and the paleoredox state that affects the enrichment of β-carotane appears to have a *** paleoclimate conditions do not considerably impact the enrichment of β-carotane,but they have some influence on the water's paleosalinity by affecting evaporation and *** it does not directly affect the enrichment of β-carotane in the Fengcheng Fm.,paleosalinity does have an impact on the cyanobacterial precursor supply and the preservation conditions.

关键词： β-carotane enrichment Cyanobacterial input environmental impact Alkaline lacustrine source rocks The Fengcheng formation

The inhibitory effect of adenosine on tumor adaptive immunity and intervention strategies

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Acta Pharmaceutica Sinica b 2024年第5期14卷 1951-1964页

作者： Longsheng Wang Jie Zhang Wenxin Zhang mingming Zheng Hongjie Guo Xiaohui Pan Wen Li bo Yang Ling ding Zhejiang Province Key Laboratory of Anti-Cancer Drug Research Institute of Pharmacology and ToxicologyCollege of Pharmaceutical SciencesZhejiang UniversityHangzhou 310058China The Innovation Institute for Artificial Intelligence in medicine Zhejiang UniversityHangzhou 310018China Nanhu brain-Computer Interface Institute Hangzhou 311100China

Adenosine(Ado)is significantly elevated in the tumor microenvironment(Tme)compared to normal *** binds to adenosine receptors(AdoRs),suppressing tumor antigen presentation and immune cell activation,thereby inhibiting tumor adaptive *** downregulates major histocompatibility complex II(mHC II)and co-stimulatory factors on dendritic cells(DCs)and macrophages,inhibiting antigen *** suppresses anti-tumor cytokine secretion and T cell activation by disrupting T cell receptor(TCR)binding and signal *** also inhibits chemokine secretion and KCa3.1 channel activity,impeding effector T cell trafficking and infiltration into the tumor ***,Ado diminishes T cell cytotoxicity against tumor cells by promoting immune-suppressive cytokine secretion,upregulating immune checkpoint proteins,and enhancing immune-suppressive cell *** Ado production in the Tme can significantly enhance anti-tumor immune responses and improve the efficacy of other *** and clinical development of inhibitors targeting Ado generation or AdoRs is ***,this article will summarize and analyze the inhibitory effects and molecular mechanisms of Ado on tumor adaptive immunity,as well as provide an overview of the latest advancements in targeting Ado pathways in anti-tumor immune responses.

关键词： Adenosine Adenosine receptors Adenosine-generating enzymes Tumor microenvironment Immune suppression Immune escape Clinical treatment Targeting drugs