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Nano Research 2024年第4期17卷 2420-2428页

作者： Guangyong Liu Yumiao lu JunFeng lu Yanlei Wang shijing Liang Hongyan He Lilong Jiang National Engineering Research center of chemical Fertilizer catalyst Fuzhou UniversityFuzhou 350002China cAs Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex SystemsBeijing Key Laboratory of Ionic Liquids Clean ProcessInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Longzihu New Energy Laboratory Zhengzhou Institute of Emerging Industrial TechnologyZhengzhou 450000China

Electrocatalytic depolymerization of lignin into value-added chemicals offers a promising technique to make biorefining ***,we report a robust trimetallic PdNiBi electrocatalyst for reductive c–O bond cleavage of different lignin model dimers and oxidized lignin under mild *** reduction reaction proceeds with complete substrate conversion and excellent yields toward monomers of phenols(80%–99%)and acetophenones(75%–96%)in the presence of an ionic liquid electrolyte with operational *** experimental investigations together with density functional theory(DFT)calculations reveal that the outstanding performance of the catalyst results from the synergistic effect of the metal elements,which facilitates the easier formation of a key cαradical intermediate and the facile desorption of the as-formed products at the *** results open up new opportunities for lignin valorization through the green electrocatalytic approach.

关键词： electrocatalytic depolymerization lignin Ionic liquids density functional theory(DFT)calculation

Rotating effects on the photoionization cross-section of a 2D quantum ring

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communications in Theoretical Physics 2024年第10期76卷 153-159页

作者： carlos Magno O Pereira Frankbelson dos s Azevedo luís Fernando c Pereira Edilberto O silva Departamento de Física Universidade Federal do Maranh?o

In this article, we investigate the nonrelativistic quantum motion of a charged particle within a rotating frame, taking into account the Aharonov–Bohm(AB) effect and a uniform magnetic field. Our analysis entails the derivation of the equation of motion and the corresponding radial equation to describe the system. solving the resulting radial equation enables us to determine the eigenvalues and eigenfunctions, providing a clear expression for the energy levels. Furthermore,our numerical analysis highlights the substantial influence of rotation on both energy levels and optical properties. specifically, we evaluate the photoionization cross-section with and without the effects of rotation. To elucidate the impact of rotation on the photoionization process of the system, we present graphics that offer an appealing visualization of the intrinsic nature of the physics involved.

关键词： Aharonov-Bohm effect photoionization cross-section quantum ring rotating effect

Mega-constellations Based TT&c Resource sharing: Keep Reliable Aeronautical communication in an Emergency

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china communications 2024年第2期21卷 1-16页

作者： Haoran Xie Yafeng Zhan Jianhua lu Department of Electronic Engineering Tsinghua UniversityBeijing 100084China Beijing National Research center for Information science and Technology Tsinghua UniversityBeijing 100084China

With the development of the transportation industry, the effective guidance of aircraft in an emergency to prevent catastrophic accidents remains one of the top safety concerns. Undoubtedly, operational status data of the aircraft play an important role in the judgment and command of the Operational control center(Occ). However, how to transmit various operational status data from abnormal aircraft back to the Occ in an emergency is still an open problem. In this paper, we propose a novel Telemetry, Tracking,and command(TT&c) architecture named collaborative TT&c(coTT&c) based on mega-constellation to solve such a problem. coTT&c allows each satellite to help the abnormal aircraft by sharing TT&c resources when needed, realizing real-time and reliable aeronautical communication in an emergency. specifically, we design a dynamic resource sharing mechanism for coTT&c and model the mechanism as a single-leader-multi-follower stackelberg game. Further, we give an unique Nash Equilibrium(NE) of the game as a closed form. simulation results demonstrate that the proposed resource sharing mechanism is effective, incentive compatible, fair, and reciprocal. We hope that our findings can shed some light for future research on aeronautical communications in an emergency.

关键词： aeronautical emergency communication mega-constellation networked TT&c resource allocation stackelberg game

Photocatalytic reduction of cO_(2) with H_(2)O into c_(2)H_(6) mediated by dual metalation strategy

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science china chemistry 2024年第5期67卷 1381-1383页

作者： Mei Wang Tong-Bu lu school of Materials science and Engineering Institute for New Energy Materials&Low Carbon TechnologiesTianjin University of TechnologyTianjin 300384China

Artificial solar-energy-driven cO_(2) reduction into value-added fuels under mild conditions provides a promising strategy to mitigate energy crisis and alleviate environmental issues around the world. Among diverse products of cO_(2) reduction reaction, c_(2+) compounds are more desirable in terms of their high energy density and commercial value [1].Thus far, various photocatalysts have been constructed for cO_(2) reduction.

关键词： reduction desirable value

Floristic composition and edaphic relationships in ferruginous campo rupestre reference ecosystems

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Journal of Mountain science 2024年第3期21卷 719-733页

作者： G.Wilson FERNANDEs Letícia RAMOs Dario c.PAIVA Jéssica cUNHA-BluM Vanessa matos GOMEs Daniel NEGREIROs Ecologia Evolutiva&Biodiversidade Departamento de GenéticaEcologia e Evolução/ICBUniversidade Federal de Minas Gerais31270-901Belo HorizonteMGBrazil Knowledge center for Biodiversity 31270-901Belo HorizonteMGBrazil Department of Biological sciences Institute of EnvironmentFlorida International UniversityMiamiFL 33199USA Programa de Pós Graduação em Biodiversidade e Uso dos Recursos Naturais Universidade Estadual de Montes ClarosMontes ClarosMGBrazil Laboratório de Estudo das Relações solo-Planta Departamento de SolosUniversidade Federal Rural do Rio de JaneiroSeropédicaRGBrazil

Land use change and occupation have led to modifications in the environment causing loss of biodiversity and ecosystem services throughout the *** environments with high economic relevance,such as the ferruginous campo rupestre(rupestrian grassland known as canga in Brazil),are even more susceptible to severe impacts due to their extreme habitat conditions and low *** determination of reference ecosystems based on the intrinsic characteristics of the ecosystem is essential for conservation as well as to the implementation of ecological *** proposed the reference ecosystem of the three main types of habitats of the ferruginous campo rupestre based on their floristic *** described the floristic composition of each habitat and evaluated the physicochemical properties of the soils and the relationship between plants and *** three habitats showed high diversity of plant species and many endemic species,such as chamaecrista choriophylla,cuphea pseudovaccinium,Lychnophora pinaster,and Vellozia *** distribution of vegetation was strongly related with the edaphic characteristics,with a set of species more adapted to high concentration of base saturation,fine sand,organic carbon,and iron,while another set of species succeeded in more acidic soils with higher s and silt *** provide support for the contention that the ferruginous campo rupestre is a mosaic of different habitats shaped by intrinsic local *** to recognize the floristic composition of each particular habitat can lead to inappropriate restoration,increased habitat homogenization and increased loss of biodiversity and ecosystem *** study also advances the knowledge base for building the reference ecosystem for the different types of ferruginous campo rupestre habitats,as well as a key database for highlighting those species contribute most to community assembly in this diverse and threatened tropical mountain ecosystem.

关键词： canga Ecological restoration Extreme ecosystem Non-forest ecosystems Rupestrian grassland Taxon environment relationships

cobalt-catalyzed reductive alkynylation to construct c(sp)-c(sp^(3))and c(sp)-c(sp^(2))bonds

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chinese chemical Letters 2024年第7期35卷 253-258页

作者： Lei Wan Yizhou Tong Xi lu Yao Fu Hefei National Research center for Physical sciences at the Microscale iChEMCAS Key Laboratory of Urban Pollutant ConversionAnhui Province Key Laboratory of Biomass Clean EnergyUniversity of Science and Technology of ChinaHefei 230026China Key Laboratory of Precision and Intelligent chemistry School of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026China

Transition-metal-catalyzed cross-electrophile coupling has emerged as a reliable method for constructing carbon–carbon ***,we report a general method,cobalt-catalyzed reductive alkynylation,to construct c(sp)-c(sp^(3))and c(sp)-c(sp^(2))*** presented reaction has a broad substrate scope,enabling the efficient cross-electrophile coupling between alkynyl bromides with alkyl halides and aryl or alkenyl(pseudo)*** presented reaction is conducted under mild conditions,tolerating many functional groups,thus suitable for the modification and synthesis of biologically active molecules.

关键词： cobalt-catalysis cross-electrophile coupling carbon-carbon bond formation Reductive alkynylation Alkyne synthesis

Effect of(cr,V)_(2)(c,N)on the Microstructure and Mechanical Properties of Wc-10co cemented carbides

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Journal of Wuhan University of Technology(Materials science) 2024年第5期39卷 1138-1148页

作者： LI Xiangkun WANG lu YE Jinwen school of Materials science and Engineering Sichuan UniversityChengdu 610065China

Wc-10co cemented carbides with finer Wc and narrower grain size distributions are produced by using(cr,V)_(2)(c,N)as grain growth *** a result,with the increase of(cr_(0.9),V_(0.1))_(2)(c,N)and(V_(0.9),cr_(0.1))_(2)(c,N),the grains size of Wc and mean free path of co phase decrease,and adjacency of Wc *** and homogenization of grains enhance the transverse rupture strength(TRs)and the ***,the deflection and bridging of cracks keep the fracture toughness at a respectable *** Wc-10co-0.6(cr_(0.9),V_(0.1))_(2)(c,N)-0.025(V_(0.9),cr_(0.1))_(2)(c,N)cemented carbides exhibit excellent comprehensive mechanical properties with the TRs of 4602.6 MPa,hardness of 1835 kg/mm^(2),and fracture toughness of 10.39 MPa·m^(1/2),***,the large pores are caused by excess N larger than 0.03 wt%and deteriorates the mechanical *** provide a new approach to Wc-co cemented carbides preparation with a narrow grain size distribution by adding novel grain growth inhibitors.

关键词： (cr,V)_(2)(c,N) nutrient content Wc grains size microstructure mechanical properties

Black hole shadows in Einstein-Bel-Robinson gravity

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chinese Physics c 2024年第5期48卷 272-283页

作者： B.Hamil B.c.Lütfüoğlu Laboratoire de Physique Mathématique et subatomique Facultédes Sciences ExactesUniversitéConstantine 1ConstantineAlgeria Department of Physics University of Hradec KrálovéRokitanského 6250003 Hradec KrálovéCzechia

Gravity models given by higher-order scalar curvature corrections are believed to bear important consequences. Einstein-Bel-Robinson (EBR) gravity with quartic curvature modification motivated sajadi et al. to explore static spherically symmetric black hole solutions using perturbative methods. In this study, inspired by their work, we investigate Ads black hole shadows in EBR gravity and demonstrate how the gravity parameter alters the energy emission rate. Finally, we address the same problem in the presence of plasma, because the black holes are thought to be surrounded by a medium that changes the geodesic of photons.

关键词： black hole shadows Einstein-Bel-Robinson gravity plasma

Jianpi Qinghua Formula Alleviates Diabetic Myocardial Injury Through Inhibiting JunB/c-Fos Expression

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current Medical science 2024年第1期44卷 144-155页

作者： Lin WANG Qing-guang cHEN Hao lu Department of Endocrinology Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghai 201203China Department of Traditional chinese Medicine Naval Medical UniversityShanghai 200433China

Objective Diabetic cardiomyopathy(DcM)represents a substantial risk factor for heart failure and increased mortality in individuals afflicted with diabetes mellitus(DM).DcM typically manifests as myocardial fibrosis,myocardial hypertrophy,and impaired left ventricular diastolic *** the clinical utility of the Jianpi Qinghua(JPQH)formula has been established in treating diabetes and insulin resistance,its potential efficacy in alleviating diabetic cardiomyopathy remains *** study aims to investigate the impact and underlying molecular mechanisms of the JPQH formula(JPQHF)in ameliorating myocardial injury in nonobese diabetic rats,specifically focusing on apoptosis and *** Wistar rats were assigned as the normal control group(cON),while Goto-Kakizaki(GK)rats were randomly divided into three groups:DM,DM treated with the JPQHF,and DM treated with metformin(MET).Following a 4-week treatment regimen,various biochemical markers related to glucose metabolism,cardiac function,cardiac morphology,and myocardial ultrastructure in GK rats were *** sequencing was utilized to analyze differential gene expression and identify potential therapeutic *** vitro experiments involved high glucose to induce apoptosis and inflammation in H9c2 *** viability was evaluated using ccK-8 assay,apoptosis was monitored via flow cytometry,and the production of inflammatory cytokines was measured using quantitative real-time PcR(qPcR)and *** expression levels were determined by Western blotting *** investigation also incorporated the use of MAPK inhibitors to further elucidate the mechanism at both the transcriptional and protein *** The JPQHF group exhibited significant reductions in interventricular septal thickness at end-systole(IVss)and left ventricular internal diameter at end-systole and end-diastole(LVIDs and LVIDd).JPQHF effectively suppressed high glucose-induced activation of IL-1βand caspase 3 in

关键词： Jianpi Qinghua formula diabetic cardiomyopathy AP-1 transcription factor apoptosis inflammation

constructing s-scheme charge separation in cobalt phthalocyanine/oxygen-doped g-c_(3)N_(4) heterojunction with enhanced photothermal-assisted photocatalytic H_(2) evolution

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Rare Metals 2024年第1期43卷 198-211页

作者： Wei-Long shi Zheng Xu Yu-Xing shi Ling-Ling Li Jia-Lin lu Xin-Hai sun Xin Du Feng Guo chang-Yu lu school of Material science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China school of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003JiangsuChina college of chemistry Zhengzhou UniversityZhengzhou 450001China school of Water Resource and Environment Hebei Province Key Laboratory of Sustained Utilization and Development of Water RecourseHebei Center for Ecological and Environmental Geology ResearchHebei Geo UniversityShijiazhuang 050031China

Hydrogen acquisition from solar energy is an effective way to address energy crisis,which makes the development of efficient photocatalysts become the main direction of scientific ***,cobalt phthalocyanine/oxygen-doped g-c_(3)N_(4)(coPc/OcN) s-scheme heterojunction photocatalyst was designed by coupling multi-step calcination with solvothermal method for enhanced photothermal-assisted photocatalytic H_(2) *** multistep calcined g-c_(3)N_(4) is easier for O-doping formation,and the ethanol solvothermal strategy is utilized to enhance the dispersion of coPc on OcN nano sheet surface and forms sufficient s-scheme heterojunction through *** addition,the active sites and excellent photothermal properties of coPc itself further improve the integrated photocatalytic activity of coPc/OcN s-scheme *** optimal photocatalytic hydrogen evolution rate of coPc/OcN s-scheme heterojunction photocatalyst reached 9.56 mmol·g^(-1)·h^(-1),which is 2.69 and 1.23 times higher than that of cN and OcN,*** work provides a valuable design idea and scheme for enhancing the multi-factor co-assisted photocatalytic H_(2) evolution performance.

关键词： Photothermal Photocatalytic H_(2)evolution cobalt phthalocyanine Oxygen-doped g-c_(3)N_(4) sscheme heterojunction