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Research in Astronomy and Astrophysics 2024年第8期24卷 44-53页

作者： Jin-Hui rao Shu-Xu Yi Lian Tao Qing-Wen Tang Department of Physics School of Physics and Materials ScienceNanchang University Institute of High Energy Physics Chinese Academy of Sciences

Theories of modified gravity suggest that the propagation speed of gravitational waves （GW） vgmay deviate from the speed of light c.A constraint can be placed on the difference between c and vgwith a simple method that uses the arrival time delay between GW and electromagnetic wave simultaneously emitted from a burst *** simulated the joint observation of GW and short gamma-ray burst signals from binary neutron star merger events in different observation campaigns,involving advanced LIGO （aLIGO） in design sensitivity and Einstein Telescope（ET） joint-detected with Fermi/*** a result,the relative precision of constraint on vgcan reach～10-17（aLIGO） and～10-18（ET）,which are one and two orders of magnitude better than that from GW170817,*** continue to obtain the bound of graviton mass mg≤7.1（3.2）×10-20ev with aLIGO （ET）.Applying the Standard-Model Extension test framework,the constraint on vgallows us to study the Lorentz violation in the nondispersive,nonbirefringent limit of the gravitational *** obtain the constraints of the dimensionless isotropic coefficients ■at mass dimension d=4,which are■for aLIGO and■for ET.

关键词： (stars:) gamma-ray burst: general gravitational waves stars: neutron

Phase transition of multi-component(TiZrvNb)c ceramics—Part I:Phase decomposition induced by carbon content

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Journal of Advanced ceramics 2024年第5期13卷 679-688页

作者： Qingyi Kong rao Zhang Lei chen Sijia Huo Wenyu Lu Yujin Wang Boxin Wei Yu Zhou Institute for Advanced ceramics School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150080China Key Laboratory of Advanced Structure‒Function Integrated Materials and Green Manufacturing Technology Harbin Institute of TechnologyHarbin 150001China School of Materials Science and chemical Engineering Harbin University of Science and TechnologyHarbin 150001China National Key Laboratory of Precision Hot Processing of Metals Harbin Institute of TechnologyHarbin 150001China

Phase decomposition can effectively enhance the mechanical properties of carbide ceramics and can overcome the difficulty of enhancing the mechanical properties of single-phase multicomponent carbide *** this work,a series of nonstoichiometric(TiZrvNb)cx ceramics were prepared by spark plasma sintering(SPS)at different *** effects of the carbon content on the phase composition,microstructure evolution,and mechanical properties were investigated in *** decomposition occurred with decreasing carbon *** different solid solutions of(Ti,v)-rich and Zr-rich phases formed from the decomposition of equimolar single-phase solid solutions,namely,the Zr-poor phase and Zr-rich phase,*** distribution of Nb element is relatively *** semicoherent interfaces between the Zr-poor phase and the Zr-rich phase can harden and strengthen effectively under the synergistic effect of grain *** with phase decomposition structures have apparent advantages compared to single-phase high-entropy *** work provides an important train of thought for the microstructure tailoring and properties optimization of multi-component carbide ceramics.

关键词： multicomponent ceramics nontoichiometry microstructure evolution phase decomposition mechanical properties

Jurassic integrative stratigraphy,biotas,and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

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Science china Earth Sciences 2024年第4期67卷 1195-1228页

作者： Jianguo LI Xin rao Lin MU Xiaohui cUI Xin LI Hui LUO Peixue LIU center for Excellence in Life and Paleoenvironment Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008China Nanjing college University of Chinese Academy of SciencesNanjing 211135China

The Qinghai-Tibetan Plateau experienced a unique geological evolution during the Jurassic,driven by the termination of the Palaeotethys and the reduction of the *** Indian Plate separated from the northern margin of Gondwana and drifted northward from the Southern *** that the timing of strata serves as the basis for reconstructing geological history,the present work aimed to develop a new multiple stratigraphic and chronologic framework for the Jurassic strata of the Qinghai-Tibetan Plateau region via a synthesis of the material on lithostratigraphy,palaeontology,iso-radiometric dating,magnetostratigraphy,and other techniques with an emphasis on recent progress and *** new framework included the Jurassic System from the four major subdivisions of the plateau:the Baryan Har,Qiangtang,Lhasa-Gandise,and Southern Xizang(Himalaya).Ultimately,a more complete,refined biostratigraphic sequence was proposed,comprising the most common fossils in the plateau and those that are stratigraphically significant for the Jurassic stratigraphy,including ammonites,bivalves,brachiopods,foraminifera,radiolarians,and dinoflagellate cysts for the marine strata,and pollen and spores,and charophytes for the terrestrial *** biostratigraphic framework was correlated with the Jurassic international standard zonation of the Geological Time Scale 2020 via standard or representative species or genera of *** on this framework,we constructed a lateral correlation of the Jurassic strata between different basins of the *** palaeontologic correlation in the present work shows that the Lhasa-Gandise Block had a closer relationship with the Qiangtang Block than with the Southern Xizang Himalaya during the Jurassic ***,the Lhasa-Gandise Block and Qiangtang Block shared similar marine fauna features of the north marginal East *** contrasts the opinion suggesting that the Yarlung Zangbo Tethys was a small back-arc basin.A c

关键词： Biostratigraphy chronostratigraphy correlation Yarlung Zangbo suture Bangong co-Nujiang suture Tethys

Regulating the electronic structure of Ir single atoms by ZrO_(2)nanoparticles for enhanced catalytic oxidation of formaldehyde at room temperature

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chinese chemical Letters 2024年第7期35卷 200-205页

作者： Shiqi Peng Yongfang rao Tan Li Yufei Zhang Jun-ji cao Shuncheng Lee Yu Huang Key Laboratory of Aerosol chemistry&Physics State Key Laboratory of Loess and Quaternary Geology(SKLLQG)Institute of Earth EnvironmentChinese Academy of Sciences(CAS)Xi’an 710061China School of Human Settlements and civil Engineering Xi’an Jiaotong UniversityXi’an 710049China Department of Environmental Science and Engineering Xi’an Jiaotong UniversityXi’an 710049China Faculty of chemical Engineering Kunming University of Science and TechnologyKunming 650500China School of Environment and Energy South China University of TechnologyGuangzhou 51006China School of Environmental and Municipal Engineering Xi’an University of Architecture and TechnologyXi’an 710055China Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100190China Department of civil and Environmental Engineering The Hong Kong Polytechnic UniversityHong KongChina cAS center for Excellence in Quaternary Science and Global change Xi’an 710061China

Developing low-loading single-atom catalysts with superior catalytic activity and selectivity in formaldehyde(HcHO)oxidation at room temperature remains ***,ZrO_(2)nanoparticles coupled low-loading Ir single atoms in N-doped carbon(Ir_(1)-N-c/ZrO_(2))was *** optimal Ir_(1)-N-c/ZrO_(2)with 0.25 wt%Ir loading delivers the high HcHO removal and conversion efficiency(>95%)at 20℃,which is higher than that over Ir_(1)-N-c with the same Ir *** specific rate can reach 1285.6 mmol gIr^(-1)h^(-1),surpassing the Ir based catalysts reported to *** functional theory calculation results and electron spin resonance spectra indicate that the introduction of Zr O_(2)nanoparticles modulate the electronic structure of the Ir single atoms,promoting O_(2)activation to·O_(2)^(–).Moreover,the Ir-c-Zr channel is favorable for the dissociation of·O_(2)^(–)to active oxygen atom(*O),and further accelerates the transformation of HcHO and intermediates(dioxymethylene and formates)to cO_(2)and H_(2)*** work provides a facile strategy to design low-loading single-atom catalysts with high catalytic activity toward HcHO oxidation.

关键词： ZrO_(2)nanoparticles Ir single atoms Electronic structure Formaldehyde catalytic oxidation

Selective leaching of lithium from spent lithium-ion batteries using sulfuric acid and oxalic acid

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International Journal of Minerals,Metallurgy and Materials 2024年第4期31卷 688-696页

作者： Haijun Yu Dongxing Wang Shuai rao Lijuan Duan cairu Shao Xiaohui Tu Zhiyuan Ma Hongyang cao Zhiqiang Liu Institute of Advanced Wear&corrosion Resistant and Functional Materials Jinan UniversityGuangzhou 510632China Institute of Resources Utilization and Rare Earth Development Guangdong Academy of SciencesGuangzhou 510650China State Key Laboratory of Separation and comprehensive Utilization of Rare Metals Guangzhou 510650China Guangdong Province Key Laboratory of Rare Earth Development and Application Guangzhou 510650China

Traditional hydrometallurgical methods for recovering spent lithium-ion batteries(LIBs)involve acid leaching to simultaneously extract all valuable metals into the *** methods usually are followed by a series of separation steps such as precipitation,extraction,and stripping to separate the individual valuable *** this study,we present a process for selectively leaching lithium through the synergistic effect of sulfuric and oxalic *** optimal leaching conditions(leaching time of 1.5 h,leaching temperature of 70°c,liquid-solid ratio of 4 mL/g,oxalic acid ratio of 1.3,and sulfuric acid ratio of 1.3),the lithium leaching efficiency reached89.6%,and the leaching efficiencies of Ni,co,and Mn were 12.8%,6.5%,and 21.7%.X-ray diffraction(XRD)and inductively coupled plasma optical emission spectrometer(IcP-OES)analyses showed that most of the Ni,co,and Mn in the raw material remained as solid residue oxides and *** study offers a new approach to enriching the relevant theory for selectively recovering lithium from spent LIBs.

关键词： selective leaching oxalic acid sulfuric acid spent lithium-ion batteries

Effectiveness of c-Reactive Protein as a Tuberculosis Screening Test Among HIv-Infected Individuals—Shanghai,china,2021-2023

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china cDc weekly 2024年第35期6卷 891-895页

作者： Lixin rao Zheyuan Wu Jing chen Zhen Ning Xin Shen Shanghai Municipal center for Disease control and Prevention ShanghaiChina

Summary What is already known about this topic?The World Health Organization(WHO)has recommended the inclusion of the c-reactive protein(cRP)test in active tuberculosis(ATB)screening algorithms among human immunodeficiency virus(HIv)-infected *** performance of the cRP test in African regions has been *** is added by this report?This study analyzed data from a big data platform of Shanghai medical records together with infectious disease surveillance systems.

关键词： Infect tuberculosis records

Physiological Mechanism of Exogenous Selenium in Alleviating Mercury Stress on Pakchoi(Brassica campestris L.)

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Phyton-International Journal of Experimental Botany 2024年第5期93卷 951-962页

作者： chengxu Qian Qiangwen chen Leiyu Jiang Xiaoyan Yang Shen rao Weiwei Zhang Feng Xu college of Horticulture and Gardening Yangtze UniversityJingzhou434025China Enshi Se-Run Material Engineering Technology co. Ltd.Enshi445000China Henry Fok School of Biology and Agricultural Shaoguan UniversityShaoguan512005China National R&D for Se-Rich Agricultural Products Processing Technology Wuhan Polytechnic UniversityWuhan430023China

The objective of this study was to explain the physiological mechanisms through which Na_(2)SeO_(3) mitigates the growth and developmental inhibition of pakchoi under Hgcl_(2)*** results showed that treatment with Hgcl_(2)(40 mg L^(−1))led to reduced biomass,dwarfing,root shortening,and root tip necrosis in *** to control(cK),the activities of superoxide dismutase(SOD)and peroxidase(POD)in Hg treatment increased,and the content of malondialdehyde(MDA)also dramatically increased,which negatively impacted the growth of *** concentrations of Na_(2)SeO_(3)(0.2 mg L^(−1))significantly increased the content of soluble sugars compared with control,while chlorophyll,soluble proteins,free amino acids,and vitamin c had no significant *** results of the mixed treatments with Hgcl_(2)and Na_(2)SeO_(3) suggested that selenium may be able to reduce the toxicity of mercury in *** biomass,plant height,root length,chlorophyll content,soluble protein,other physiological indicators,and proline showed significant increases compared with the Hgcl_(2)***,the MDA content and mercury accumulation in pakchoi *** results revealed the antagonistic effects of selenium and mercury in ***,a theoretical basis for studying pakchoi’s mercuryexcreted and selenium-rich cultivation technology was provided.

关键词： Selenium mercury stress pakchoi physiological properties antioxidant enzymes

Direct detection of c9orf72 hexanucleotide repeat expansions by nanopore biosensor

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chinese chemical Letters 2024年第5期35卷 351-354页

作者： Xinqiong Li Guocheng rao Xi Peng chan Yang Yanjing Zhang Yan Tian Xianghui Fu Jia Geng State Key Laboratory of Biotherapy and cancer center West China HospitalSichuan University and Collaborative Innovation Center of BiotherapyChengdu 610041China Division of Endocrinology and Metabolism West China School of Medicine/West China HospitalSichuan UniversityChengdu 610041China Department of Endocrinology and Metabolism Affiliated Hospital of North Sichuan Medical CollegeNorth Sichuan Medical CollegeNanchong 637000China Division of Endocrinology and Metabolism National Clinical Research Center for GeriatricsState Key Laboratory of Biotherapy and Cancer CenterWest China HospitalSichuan University and Collaborative Innovation Center of BiotherapyChengdu 610041China Department of Laboratory Medicine State Key Laboratory of BiotherapyMed-X Center for ManufacturingWest China HospitalSichuan University and Collaborative Innovation CenterChengdu 610041China Tianfu Jincheng Laboratory City of Future MedicineChengdu 641400China

Diagnostic c9orf72 hexanucleotide repeat expansions(c9-HRE)is essential for the early and accurate diagnosis of amyotrophic lateral sclerosis(ALS)and will provide support for the prognosis and gene therapy of *** the present study,by combining catalytic hairpin assembly(cHA)with Mycobacterium smegmatis porin A(MspA)nanopore,a new nanopore-based strategy for the detection of c9-HRE was *** than 30 repeats of c9-HRE could be detected via this method,and the results have the potential to help distinguish between patients and healthy ***,the method demonstrated its great specificity for c9-HRE by identifying other repeat *** the high selectivity,this approach had been successfully used to detect c9-HRE in cell and blood samples with high *** detection strategy is user-friendly and has a strong anti-interference ability,thus providing a powerful tool for clinical diagnosis.

关键词： MspA nanopore c9orf72 HRE Detection Biosensor catalytic hairpin assembly

Two new high-temperature molecular ferroelectrics[1,5-3.2.2-Hdabcn]X(X=clO_(4)^(-),ReO_(4)^(-))

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chinese chemical Letters 2024年第6期35卷 234-238页

作者： Keke Han Wenjun rao Xiuli You Haina Zhang Xing Ye Zhenhong Wei Hu cai School of chemistry and chemical Engineering Nanchang UniversityNanchang 330031China Jiangxi Key laboratory of Organic chemistry Jiangxi Science and Technology Normal UniversityNanchang 330013China

Molecular ferroelectrics have attracted much attention because of their excellent piezoelectricity,mechanical workability,and second harmonic ***,we successfully prepared two molecular ferroelectrics[1,5-3.2.2-Hdabcn]X(X=clO_(4)^(-),1;ReO_(4)^(-),2)by reactions of a quasi-spherical amine 1,5-diazabicycle[3.2.2]nonane(1.5-3.2.2-dabcn)with HX aqueous *** 1 and 2 undergo hightemperature phase transitions at 381 K(1)and 396 K(2).Before and after the phase transition,they crystallize in the polar point group mm2,and the centrosymmetric point groups mmm and 4/mmm,*** to Aizu rules,these two compounds experience mmm Fmm2 and 4/mmm Fmm2 type ferroelectric phase transitions,*** ferroelectricity of both compounds is well expressed in their polycrystalline film at room temperature with low coercive voltages of 13 v for 1 and 25 v for *** piezoelectric force microscopy(PFM),the 180°anti-parallel ferroelectric domains and the reversible polarization switching can be clearly observed in 1 and *** high-temperature molecular ferroelectric material has great application potential in flexible materials,biomechanics,intelligent wearables and other fields.

关键词： Ferroelectric domains Quasi-spherical amine Phase transition Polarization

Oxidation behavior of Fev_(2)O_(4)and Fecr_(2)O_(4)particles in the air:Nonisothermal kinetic and reaction mechanism

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International Journal of Minerals,Metallurgy and Materials 2024年第8期31卷 1839-1848页

作者： Junyi Xiang Xi Lu Luwei Bai Hongru rao Sheng Liu Qingyun Huang Shengqin Zhang Guishang Pei Xuewei Lü School of Metallurgy and Materials Engineering Chongqing University of Science and TechnologyChongqing 401331China Department of Materials Science and Engineering Seoul National UniversitySeoul 08826Rep.of Korea college of Materials Science and Engineering Chongqing UniversityChongqing 400044China

High-temperature oxidation behavior of ferrovanadium(Fev_(2)O_(4))and ferrochrome(Fecr_(2)O_(4))spinels is crucial for the application of spinel as an energy material,as well as for the clean usage of high-chromium vanadium ***,the nonisothermal oxidation behavior of Fev_(2)O_(4)and Fecr_(2)O_(4)prepared by high-temperature solid-state reaction was examined by thermogravimetry and X-ray diffraction(XRD)at heating rates of 5,10,and 15 K/*** apparent activation energy was determined by the Kissinger-Akahira-Sunose(KAS)method,whereas the mechanism function was elucidated by the Malek ***,in-situ XRD was conducted to deduce the phase transformation of the oxidation mechanism for Fev_(2)O_(4)and Fecr_(2)O_(4).The results reveal a gradual increase in the overall apparent activation energies for Fev_(2)O_(4)and Fecr_(2)O_(4)during *** stages of the oxidation process are observed based on the oxidation conversion rate of each *** oxidation mechanisms of Fev_(2)O_(4)and Fecr_(2)O_(4)are complex and have distinct *** particular,the chemical reaction controls the entire oxidation process for Fev_(2)O_(4),whereas that for Fecr_(2)O_(4)transitions from a three-dimensional diffusion model to a chemical reaction *** to the in-situ XRD results,numerous intermediate products are observed during the oxidation process of both compounds,eventually resulting in the final products FevO_(4)and v2O_(5)for Fev_(2)O_(4)and Fe_(2)O_(3)and cr_(2)O_(3)for Fecr_(2)O_(4),respectively.

关键词： Fev_(2)O_(4) Fecr_(2)O_(4) oxidation nonisothermal kinetics mechanism