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CCS Chemistry 2024年第9期6卷 2198-2209页

作者： shuyuan Zheng Guofeng Liu School of Chemical Science and Engineering Advanced Research InstituteTongji UniversityShanghai 200092

In-depth studies of hierarchical self-assembly with chirality inversion and asymmetry amplification are indispensable for understanding the chiral transfer rule in assembly systems and construction of circularly polarized luminescence(CPL)active ***,a coordination-driven primary assembly of pyrene-based chiral ligand and Zn(OTf)2.was employed for the construction of homochiral metal–organic helicate with a triple helix structure,tunable emission color,and significant chirality *** excitingly,the metal–organic helicate further assembled into well-ordered hierarchical nanoarchitectures with the aid of C–H⋯πinteraction andπ–πstacking,showing significant CPL enhancement and unexpected handedness ***,the|glum|increased from 5.2.×10^(−5) to 5.60×10^(−2.,and the|gabs|rose from 3.80×10^(−4) to 1.04×10^(−2. over the entire hierarchical self-assembly *** multiple supramolecular interactions not only endowed the resultant metal–organic helicate with efficient chirality transmission and tunable emission color but also guided the(supra)molecular building block of metal–organic helicate organizing into the hierarchically chiral nanoarchitecture in a directional *** work provides insight into the metal–organic helicate-mediated hierarchical self-assembly and aids the development of CPLactive materials with dynamic chirality modulation and enhanced chiroptical performance.

关键词： supramolecular chirality inversion circularly polarized luminescence metal-organic helicate hierarchically chiral assembly chirality amplification

Experimental and numerical study on ignition and combustion characteristics of boron-magnesium composite powders

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Particuology 2024年第1期84卷 12-29页

作者： shuyuan Liu Luyang Han Hongmei Liu Yingkai Song Linlin Liu Songqi Hu Science and Technology on Combustion Internal Flow and Thermo-Structure LaboratoryNorthwestern Polytechnical UniversityXi'an710072China School of Mechanical Engineering and Rail Transit Changzhou UniversityChangzhou213164China Shanghai Institute of Space Propulsion Shanghai201112China Shanghai Engineering Research Center of Space Engine Shanghai201112China

A high-pressure laser ignition and combustion system with adjustable oxidizer gas atmosphere is established to investigate the ignition and combustion characteristics of boron-magnesium(BM)com-posite *** ignition and combustion model of BM powders is established and validated in the present *** results show that increasing water content,O_(2. content and Mg content all result in shorter ignition delay time of BM powders,among which the effect of water content is the most ***,ignition delay time increases as pressure *** combustion time decreases with increasing Mg content and ambient pressure but increases with water *** the increase of O_(2. content,combustion time of BM powders first increases and then decreases,which means a critical O_(2. content exists above which combustion time *** results show that there exists a trade-off between ignition and combustion performance of BM composite powders.

关键词： Boron magnesium powder Laser ignition Ignition and combustion model Reaction mechanism Numerical model

Atomically dispersed Ni electrocatalyst for superior urea-assisted water splitting

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Journal of Energy Chemistry 2024年第3期90卷 1-6,I0002页

作者： Fang Luo shuyuan Pan Yuhua Xie Chen Li Yingjie Yu Zehui Yang College of Materials Science and Engineering State Key Laboratory of New Textile Materials&Advanced Processing TechnologyWuhan Textile UniversityWuhan 430200China Hubei Hydrogen Energy Technology Innovation Center Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430074HubeiChina

Urea oxidation reaction(UOR) has been selected as substitution for oxygen evolution reaction ascribing to its low thermodynamic voltage as well as utilization of nickel as ***,we report the formation of nickel single atoms(Ni-SAs) as exceptional bifunctional electrocatalyst toward UOR and hydrogen evolution reaction(HER) in urea-assisted water *** UOR catalysis,Ni-SAs perform a superior catalytic performance than Ni-NP/NC and Pt/C ascribing to the formation of HOO-Ni-N_(4) structure evidenced by in-situ Raman spectroscopy,corresponding to a boosted mass activity by 175-fold at 1.4 V *** than Ni-NP/***,Ni-SAs requires only 450 mV overpotential to obtain HER current density of 500 mA cm^(-2..136 mA cm^(-2. is achieved in urea-assisted water splitting at1.7 V for Ni-SAs,boosted by 5.7 times than Pt/C-IrO_(2. driven water splitting.

关键词： Urea oxidation reaction Hydrogen evolution reaction Nickel single atoms Water splitting

In-situ observation of structural evolution of single-atom catalysts:From synthesis to catalysis

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ChemPhysMater 2024年第1期3卷 24-35页

作者： Lei Wang shuyuan Lyu Shuohao Li School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225009China School of Art and Design Huaiyin Institute of TechnologyHuaian 223003China School of Safety Engineering China University of Mining and TechnologyXuzhou 221116China

Atomically dispersed single-atom catalysts(SACs)have been extensively studied over the past decade because of their high atom utilization efficiencies and specific *** numerous strategies have been proposed to obtain SACs with high densities and stabilities,the transformation mechanism that occurs during the reaction is still *** review summarizes the structural evolution of SACs in the preparation process and reaction with various electron microscopy techniques at atomic scale under environmental *** state-of-the-art environmental electron microscopy studies on SACs mainly focus on porous carbons,metals or metal oxides,and some specific composite *** dynamic evolution of SACs under various reaction conditions is also investigated in this ***,we highlight the challenges and drawbacks of the current studies and the prospects for the future exploration of SACs with environmental strategies.

关键词： Single-atom catalysts Structural transformation Atomization Environmental electron microscope

Interseismic slip distribution and locking characteristics of the mid-southern segment of the Tanlu fault zone

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Earthquake Research Advances 2024年第3期4卷 16-26页

作者： shuyuan Yu Layue Li Jiaji Luo Yuanyuan Yang Anhui Earthquake Agency Hefei230031China Anhui Mengcheng National Geophysical Observatory MengCheng200527China China University of Mining and Technology Xuzhou221116China The First Monitoring and Application Center Tianjin300180China

We employ the block negative dislocation model to invert the distribution of fault coupling and slip rate deficit on the different segments of the Tanlu(Tancheng-Lujiang) fault zone, according to the GPS horizontal velocity field from 1991 to 2.07(the first phase) and 2.13 to 2.18(the second phase). By comparing the deformation characteristics results, we discuss the relationship between the deformation characteristics with the M earthquake in Japan. The results showed that the fault coupling rate of the northern section of Tancheng in the second phase reduced compared with that in the first phase. However, the results of the two phases showed that the northern section of Juxian still has a high coupling rate, a deep blocking depth, and a dextral compressive deficit, which is the enrapture section of the 1668 Tancheng earthquake. At the same time, the area strain results show that the strain rate of the central and eastern regions of the second phase is obviously enhanced compared with that of the first phase. The occurrence of the great earthquake in Japan has played a specific role in alleviating the strain accumulation in the middle and south sections of the Tanlu fault zone. The results of the maximum shear strain show that the shear strain in the middle section of the Tanlu fault zone in the second phase is weaker than that in the first phase, and the maximum shear strain in the southern section is stronger than that in the first phase. The fault coupling coefficient of the south Sihong to Jiashan section is high, and it is also the unruptured section of historical earthquakes. At the same time, small earthquakes in this area are not active and accumulate stress easily, so the future earthquake risk deserves attention.

关键词： Tanlu fault Middle-southern segment GPS velocity field Inter-seismic slip Fault couping Steepest descent method

A viral movement protein targets host catalases for 2.S proteasome-mediated degradation to facilitate viral infection and aphid transmission in wheat

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Molecular Plant 2024年第4期17卷 614-630页

作者： shuyuan Tian Qingting Song Wenmei Zhou Jingke Wang Yanbin Wang Wei An Yunfeng Wu Lei Zhao State Key Laboratory for Crop Stress Resistance and High-Efficiency Production College of Plant ProtectionNorthwest A&F UniversityYanglingShaanxi 712100China Key Laboratory of Integrated Pest Management on Crops in Northwestern Loess Plateau Ministry of Agriculture and Rural AffairsCollege of Plant ProtectionNorthwest A&F UniversityYanglingShaanxi 712100China Key Laboratory of Plant Protection Resources and Pest Management Ministry of EducationCollege of Plant ProtectionNorthwest A&F UniversityYanglingShaanxi 712100China

The infection of host plants by many different viruses causes reactive oxygen species(Ros)accumulation and yellowing symptoms,but the mechanisms through which plant viruses counteract RoS-mediated immunity to facilitate infection and symptom development have not been fully *** plant viruses are transmitted by insect vectors in the field,but the molecular mechanisms underlying virus-host-insect interactions are *** this study,we investigated the interactions among wheat,barley yellow dwarf virus(BYDV),and its aphid vector and found that the BYDV movement protein(MP)interacts with both wheat catalases(CATs)and the 2.S proteasomeubiquitin receptor non-ATPase regulatorysubunit2.omolog(PSMD2.to facilitate the 2.S proteasome-mediateddegradation of CATs,promotingviral infection,disease symptom development,and aphid *** of the BYDV MP gene in wheat enhanced the degradation of CATs,which leading to increased accumulation of ROS and thereby enhanced viral ***,transgenic wheat lines overexpressing BYDV MP showed significantly reduced proliferation of wingless aphids and an increased number of winged *** with this observation,silencing of CAT genes also enhanced viral accumulation and reduced the proliferation of wingless aphids but increased the occurrence of winged *** contrast,transgenic wheat plants overexpressing TaCAT1 exhibited the opposite changes and showed increases in grain size and weight upon infection with *** assays demonstrated that BYDV MP interacts with PSMD2.and promotes 2.S proteasome-mediated degradation of TaCAT1 likely in a ubiquitination-independent ***,our study reveals a molecular mechanism by which a plant virus manipulates the Ros production system of host plants to facilitate viral infection and transmission,shedding new light on the sophisticated interactions among viruses,host plants,and insect vectors.

关键词： babarley yellow dwarf virus movement protein reactive oxygen species aphid catalase 2.S proteasomeubiquitin receptor PSMD2

Quaternary 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 1360-1394页

作者： Yong WANG Mianping ZHENG Yuan LING shuyuan XIANG Zhaogang SHAO Kexin ZHANG Xue KE Xiao LIN Fang HAN Jian’en HAN Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China Institute of Mineral Resources Chinese Academy of Geological SciencesBeijing 100037China Faculty of Earth Sciences China University of GeosciencesWuhan 430074China Chinese Academy of Geological Sciences Beijing 100037China Institute of Geological Survey China University of GeosciencesWuhan 430074China School of Earth Sciences East China University of TechnologyNanchang 330013China Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China

The Quaternary strata on the Qinghai-Tibet Plateau contain rich information about the paleoclimate and environmental evolution,record the evolution process of the Quaternary regional tectonics,paleogeography,and geomorphology of the plateau,and are extremely important areas for studying the Quaternary geological events and regional environmental *** to a comprehensive analysis of the regional stratigraphic data and the development and evolution characteristics of the biota,based on the differences in the lithostratigraphic units,sedimentary characteristics,landforms,and drainage systems,the Quaternary strata on the Qinghai-Tibet Plateau and its surrounding areas are divided into five stratigraphic regions:the Tarim region,Loess Plateau region,Qinghai-Tibet Plateau region,Yunnan-Guizhou Plateau region,and India-Ganges *** Qinghai-Tibet Plateau stratigraphic region is divided into seven stratigraphic sub-regions:the West Kunlun-Karakorum,AltunQilian Mountains,Qaidam-Hehuang,East Kunlun-Bayan Har,Qiangtang,East Xizang-West Yunnan-West Sichuan,and Gangdise-Himalayan *** paper briefly describes the lithostratigraphic units of the seven stratigraphic sub-regions of the Qinghai-Tibet *** to the lithostratigraphic sequence and its sedimentary characteristics,stratigraphic contact relationship,formation age,and evolution of the biota in each stratigraphic sub-region,the Quaternary tectonic paleogeographic evolution of the Qinghai-Tibet Plateau is divided into four stages.(1)The inherited differential uplift stage since the Pliocene(2.6-1.8/1.5 Ma):the regional sedimentary differences were significant,and the stratigraphic distribution was limited,the alluvial-proluvial sandy conglomerate was widely developed along the piedmont,and fluvial and lacustrine deposits were developed in the low-lying areas between the mountains.(2.The mountain range flattening stage(1.8/1.5-1.2.0.8 Ma):the erosion unconformity surfaces around the pl

关键词： Quaternary stratigraphic sedimentary

Analysis and Monitoring of Indoor Radon Concentrations of 37 Kindergartens — Beijing Municipality, China, 2.2.

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China CDC weekly 2024年第13期6卷 272-276页

作者： Meinan Yao Kuke Ding Xiaozhe Tang Yunyun Wu Yanchao Song shuyuan Liu Bin Bai Li Zhang Yongzhong Ma Institute for Radiation Hygiene Protection Beijing Center for Disease Prevention and ControlBeijingChina Chinese Center for Disease Control and Prevention BeijingChina Key Laboratory of Radiological Protection and Nuclear Emergency&National Institute for Radiological Protection Chinese Center for Disease Control and PreventionBeijingChina

Introduction:Radon(2.2.n or 2.2.adon)is a radioactive gas emitted from building materials,foundations,and *** are especially susceptible to radon exposure,underscoring the need to assess indoor radon levels in *** study monitored radon concentrations in 37 Beijing kindergartens from June to October ***:A random sample of 37 kindergartens was selected from 18 administrative districts in *** indoor radon concentration was measured using the solid track accumulation method,with radon detectors continuously monitored over a 3-month ***:The mean indoor radon level in 37 kindergartens,observed at 2.2.monitoring points,was 84.3 Bq/m^(3),with values varying from 12.9 to 2.3.5 Bq/m^(3).About 2..2.of points showed radon levels between 100.0 and 2.0.0 Bq/m^(3),while 2.4%exceeded 2.0.0 Bq/m^(3).Notably,radon levels were significantly elevated on the ground floor compared to the upper ***:Indoor radon levels in 37 kindergartens remained below the national standard limit of 300.0 Bq/m^(3) for buildings(GB/T 16146-2.15).Nonetheless,18.9%of the kindergartens exceeded the 100.0 Bq/m^(3) limit set for new *** is advised to improve radon monitoring in kindergartens and consider developing a national standard for maximum permissible radon levels in such facilities.

关键词： Radon limit floor

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德日进的“宇宙精神学说”及其生态美学意义

文艺理论研究 2024年第1期44卷 15-24页

作者：鲁枢元河南大学 450009

德日进认为人类由于具备了自我意识、反思、反省的能力而超越了其他生物,代表了宇宙演化的最高水平。个体从本能进入思想的飞越,在生物圈之上生成了“精神圈”(noosphère;noosphere)。而集“雅”“善”为一体的“爱”,是将人类凝聚成... 详细信息

德日进认为人类由于具备了自我意识、反思、反省的能力而超越了其他生物,代表了宇宙演化的最高水平。个体从本能进入思想的飞越,在生物圈之上生成了“精神圈”(noosphère;noosphere)。而集“雅”“善”为一体的“爱”,是将人类凝聚成一个生命共同体的宇宙能量;人类的未来也必然遵循大自然的进化规律,向着整体化迈进。德日进的宇宙精神学说约略可以视为“宇宙视野中的人类生态学”,破解了主客二分认识论,筑牢了人与地球万物共生共荣的整体论,进一步奠定了生态美学的根基。生态美学所看重的生命的关联性、互动性,审美的亲和性、和谐性,艺术活动的整合能力、创造能力,以及符号意识如何打造人类健康美好的生活等等,都可以在德日进的学说中寻获有益的启示。

关键词：德日进宇宙精神精神圈爱的能量生态美学

A self-powered system to electrochemically generate ammonia driven by palladium single atomelectrocatalyst

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SusMat 2024年第5期4卷 178-188页

作者： Hao Hu shuyuan Pan Zhiyong Ma Kaiyi Liu Yi Li Haifeng Bao Chengwei Deng Fang Luo Zehui Yang State Key Laboratory of New Textile Materials&Advanced Processing Technology College of Materials Science and EngineeringWuhan Textile UniversityWuhanChina Faculty of Materials Science and Chemistry China University of GeosciencesWuhanChina Shaanxi Coal Chemical Industry Technology Research Institute Co. Ltd.Xi’anChina State Key Laboratory of Space Power-Sources Technology Shanghai Institute of Space Power SourcesShanghaiChina Hubei Key Laboratory for New Textile Materials and Applications Wuhan Textile UniversityWuhanChina

The utilization of single atoms(SAs)as trifunctional electrocatalyst for nitro-gen reduction,oxygen reduction,and oxygen evolution reactions(NRR,ORR,and OER)is still a formidable ***,we devise one-pot synthesized palladium SAs stabilized on nitrogen-doped carbon palladium SA electrocat-alyst(Pd-SA/NC)as efficient trifunctional electrocatalyst for NRR,ORR,and ***-SA/NC performs a robust catalytic activity toward NRR with faradaic efficiency of 2..5%at-0.2. V versus reversible hydrogen electrode(RHE),and the relative Pd utilization efficiency is enhanced by 17-fold than Pd-NP/*** addition,the half-wave potential reaches 0.876 V versus RHE,amounting to a 58-time higher mass activity than commercial Pt/***,the overpotential at 10 mA cm-2.is as low as 2.7 mV for Pd-SA/NC,outperforming the commer-cial IrO2.by 360 times in turnover frequency at 1.6 V versus ***,the assembled rechargeable zinc-air battery(ZAB)achieves a maximum power den-sity of 170 mW cm-2.boosted by 2.3 times than Pt/C–*** constructed ZABs efficiently power the NRR-OER system to electrochemically generate ammonia implying its superior trifunctionality.

关键词： nitrogen reduction reaction oxygen evolution reaction oxygen reduction reaction single atom