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The formation and evolutionary characteristics of organic matter and pyrites in the continental shales of the 3^(rd)submember of Chang 7 Member,Yanchang formation,Ordos Basin,China

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Energy Geoscience 2024年第2期5卷 31-39页

作者： Ruikang bian State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development Beijing 102206China Key Laboratory of Shale Oil and Gas Exploration&Production Technology SinopecBeijing 102206China SINOPEC Exploration&Production Research Institute Beijing102206China

Through microscopic analyses(e.g.,organic macerals,thin section observation,scanning electron microscope(SEM)imaging of fresh bedding planes via argon ion milling,and energy spectrum tests)combined with Rock-Eval analyses,this study systematically investigated the organic matter and pyrites in the continental shales in the 3^(rd)submember of the Chang 7 Member(Chang 7^(3)submember)in the Yanchang Formation,Ordos Basin and determined their types and the formation and evolutionary *** results are as *** organic matter of the continental shales in the Chang 7^(3)submember is dominated by amorphous bituminites and migrabitumens,which have come into being since the early diagenetic stage and middle diagenetic stage A,*** formation and transformation of organic matter is a prerequisite for the formation of *** Ordos Basin was a continental freshwater lacustrine basin and lacked sulphates in waters during the deposition of the Chang 7 ***,the syndiagenetic stage did not witness the formation of large quantities of *** the basin entered early diagenetic stage A,large quantities of sulfur ions were released as the primary organic matter got converted into bituminites and,accordingly,pyrites started to ***,this stage featured poorer fluid and spatial conditions compared with the syndepositional stage due to withdraw of water,the partial formation of bituminites,and a certain degree of *** a result,large quantities of pyrrhotite failed to transition into typical spherical framboidal pyrites but grew into euhedral monocrystal *** addition,pyrites are still visible in the migrabitumens in both microfractures and inorganic pores of mudstones and shales,indicating that the pyrite formation period can extend until the middle diagenetic stage A.

关键词： Organic matter Pyrite Formation and evolution Continental shale Chang 7^(3)submember Ordos Basin

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Facile synthesis of hierarchical NiO/NiFe_(2)O_(4) microsphere composite as efficient visible photocatalyst for 2,4-DCP degradation

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Rare Metals 2024年第4期43卷 1580-1588页

作者： Shabana Shaheen Shuai Xu Ji bian Amir Zada Zi-Qing Zhang Yang Qu li-Qiang Jing Key Laboratory of Functional Inorganic Materials Chemistry(Ministry of Education) International Joint Research Center and Lab for Catalytic TechnologySchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin150080China Department of Chemistry Abdul Wali Khan UniversityMardan23200Pakistan

It is highly desired to develop efficient photocatalysts with recycling property for practical application to degrade toxic ***,nanosheet-assembled NiFe_(2)O_(4)microspheres with commendable activity are successfully synthesized by a facile solvothermal reaction with NH4F as the modifier,and their photoactivities are further improved by coupling with NiO through an in situ growth *** optimized nickel oxide(NiO)/nickel ferrite(NiFe_(2)O_(4))microsphere composite(5NiO/NFO-4)exhibits a satisfactory photocatalytic activity for 2,4-dichlorophenol(2,4-DCP)degradation under visible-light irradiation,which is attributed to its wide visible-light response,well-designed hierarchical structure and enhanced charge transfer and separation by coupling NiO as a high-level energy platform to accept ***,it is found that the NiO/NiFe_(2)O_(4)microsphere photocatalysts can be easily collected and recycled owing to the distinctive magnetic *** work provides a feasible route to rational design visible-light-driven photocatalysts with high-activity for environmental remediation and purification with good recyclability.

关键词： NiFe_(2)O_(4) microspheres NiO/Fe_(2)O_(4) composite Charge separation Visible-light photocatalysis 2 4-Dichlorophenol degradation

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Reduced Spring Precipitation Bias and Associated Physical Causes over South China in FGOALS-f3 Climate Models:Experiments with the Horizontal Resolutions

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Journal of Meteorological Research 2024年第4期38卷 784-804页

作者： Peng ZI Yimin liU Jiandong li Ruowen YANG bian HE Qing BAO Department of Atmospheric Science Yunnan UniversityKunming 650504 State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics(LASG) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029

Considerable spring precipitation occurs over South China(SC),a region that is adjacent to large-scale Asian topography and *** reasonable simulation is crucial for improving regional climate *** study investigates spring precipitation biases over SC and their possible causes in atmosphere-only and coupled Flexible Global Ocean–Atmosphere–Land System finite-volume version 3(FGOALS-f3) models with different horizontal *** performance of spring precipitation simulation over SC varies across different FGOALS-f3 model versions,with the best reproducibility in the high-resolution coupled model(25 km).In the low-resolution atmosphere-only model(100–125 km),the precipitation dry bias over SC is closely linked to overestimated surface sensible forcing over the eastern Tibetan Plateau(TP),which weakens the subtropical anticyclone over the western Pacific(SAWP) through regional circulation *** contrast,the high-resolution atmosphere-only model further amplifies surface thermal forcing in the Asian continents,causing intensified land–sea thermal contrast between the Southeast Asian continents and western Pacific,enhanced southerly winds and SAWP,and increased water vapor transport into ***,the reduced middle–high level cold bias over 10°–30°N in the high-resolution atmosphere-only model intensifies the East Asian westerly jet and ascent over SC,leading to enhanced spring precipitation *** high-resolution coupled model simulation not only reduces sea surface cold bias over the Bay of Bengal,thus intensifying the Indian–Burma trough and strengthening low-level water vapor transport into SC,but also enhances ascent over *** a result,the high-resolution coupled model better reproduces the magnitude and pattern of spring precipitation over SC than its atmosphere-only *** with low-resolution models,the domain-mean spring precipitation dry bias decreases by 11.2% over SC in the high-resolution atmosphere-only mod

关键词： South China spring precipitation high resolution Flexible Global Ocean–Atmosphere–Land System finite-volume version 3(FGOALS-f3)models simulation

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Long-wave instabilities

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Science China Mathematics 2024年第8期67卷 1761-1776页

作者： Dongfen bian Emmanuel Grenier School of Mathematics and Statistics Beijing Institute of TechnologyBeijing 100081China Unité de Mathématiques Pures et Appliquées CNRS UMR 5669Ecole Normale Supérieure de LyonLyon 69007France

This paper aims to give a detailed presentation of long-wave instabilities of shear layers for NavierStokes equations,and in particular to give a simple and easy-to-read presentation of the study of the OrrSommerfeld equation and to detail the analysis of its *** these analyses,we prove the existence of long-wave instabilities in the cases of slowly rotating fuids,slightly compressible fuids,or fuids with Navier boundary conditions,under smallness conditions.

关键词： Navier-Stokes equations boundary layers Prandtl equations

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Chiral electron transporting material for circularly polarized organic light-emitting diode

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Science China Chemistry 2024年第11期67卷 3777-3784页

作者： Peihao Huo Tianyu Yang Peiyu Fang Yujia li Nanlong Zheng Min Gong Zuqiang bian Zhiwei liu Beijing National Laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and ApplicationsCollege of Chemistry and Molecular Engineering Peking University

Circularly polarized organic light-emitting diode(CP-OLED) has attracted increasing interest for its efficient ability to generate circularly polarized light directly. So far, many CP-OLEDs were successfully fabricated with chiral emitters or chiral hosts. In this study, a new strategy based on chiral electron transporting layer is proposed to construct CP-OLEDs. A pair of chiral electron transporting materials, 1,3,5-tris((R/S)-4-isopropyl-4,5-dihydrooxazol-2-yl)benzene((R/S)-TOxiPr), are firstly designed and synthesized. The crystalline films of(R/S)-TOxiPr show circularly polarized photoluminescence with photoluminescence dissymmetry factors of-0.067 and +0.041, respectively. The CP-OLEDs based on(R/S)-TOxiPr and three types of achiral emitters all exhibit circularly polarized electroluminescence, showing feasibility and strong versatility of this new strategy. The mechanism is attributed to in-situ electrical excitation instead of simply light filtering of non-circularly polarized light. This work demonstrates a new approach for realizing circularly polarized electroluminescence which may provide a valuable strategy to develop CP-OLEDs.

关键词： circularly polarized organic light-emitting diodes chiral electron transporting layer trisoxazolinylbenzene circularly polarized electroluminescence

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Electronic structure regulation and built-in electric field synergistically strengthen photocatalytic nitrogen fixation performance on Ti-BiOBr/TiO_(2)heterostructure

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Rare Metals 2024年第3期43卷 1125-1138页

作者： Ru-Qi li Yu-Jie bian Chun-Ming Yang li Guo Tao-Xia Ma Chuan-Tao Wang Feng Fu Dan-Jun Wang College of Chemistry and Chemical Engineering Yan’an UniversityYan’an Key Laboratory of Green Catalysis and Quality Improvement and Utilization of Low Rank CoalYan’an716000China

At present,industrial synthetic ammonia was still obtained through the Hubble-Bosch process,with large energy *** is a research hotspot to realize green synthetic ammonia by using solar *** difficulty of photocatalytic ammonia synthesis was that the photo-excited electrons have not enough energy to active N≡*** this study,Ti was doped into BiOBr by one-step hydrothermal method,which was oxidized into TiO_(2)when the doping amount reaches the maximum,in situ forming Ti_(0.31)B_(0.69)OB/TiO_(2)*** from the synergistic effect of Ti doping and S-scheme heterojunction,the synthetic ammonia efficiency of Ti_(0.31)B_(0.69)OB/TiO_(2)-11.96 reached 1.643 mmol·g_(cat)^(-1)at mild conditions and without hole scavenger for up to 7 h,the efficiency of synthetic ammonia is 115 times,10.5 times and 3.3 times of that of BiOBr,Ti_(0.31)B_(0.69)OB and TiO_(2),***,DFT calculation confirms that Ti doping accurately refine the electronic structure of BiOBr,facilitate nitrogen adsorption activation and reduce hydrogenation reaction energy barrier,thus accelerating the reaction kinetics of photocatalytic nitrogen reduction(NRR),Meanwhile,constructing S-scheme heterojunction boosts the separation and transfer of photogenerated electron-hole pairs,improving the reduction ability of electrons in the conduction band of TiO_(2)and the oxidation ability of holes in the valence band of Ti_(0.31)B_(0.69)OB.

关键词： S-scheme heterostructure Electronic structure regulation Built-in electric field Synergistical stren4gthening Photocatalytic nitrogen fixation

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Source-Load Coordinated Optimal Scheduling Considering the High Energy Load of Electrofused Magnesium and Wind Power Uncertainty

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Energy Engineering 2024年第10期121卷 2777-2795页

作者： Juan li Tingting Xu Yi Gu Chuang liu Guiping Zhou Guoliang bian School of Electrical Engineering Northeast Electric Power UniversityJilin132013China Ministry of Science and Technology Communication State Grid Liaoning Electric Power Co.Ltd.Shenyang110000China

In fossil energy pollution is serious and the“double carbon”goal is being promoted,as a symbol of fresh energy in the electrical system,solar and wind power have an increasing installed capacity,only conventional units obviously can not solve the new energy as the main body of the scheduling *** enhance the systemscheduling ability,based on the participation of thermal power units,incorporate the high energy-carrying load of electro-melting magnesiuminto the regulation object,and consider the effects on the wind unpredictability of the ***,the operating characteristics of high energy load and wind power are analyzed,and the principle of the participation of electrofusedmagnesiumhigh energy-carrying loads in the elimination of obstructedwind power is ***,a two-layer optimization model is suggested,with the objective function being the largest amount of wind power consumed and the lowest possible cost of system *** the upper model,the high energy-carrying load regulates the blocked wind power,and in the lower model,the second-order cone approximation algorithm is used to solve the optimizationmodelwithwind power uncertainty,so that a two-layer optimizationmodel that takes into account the regulation of the high energy-carrying load of the electrofused magnesium and the uncertainty of the wind power is ***,the model is solved using Gurobi,and the results of the simulation demonstrate that the suggested model may successfully lower wind abandonment,lower system operation costs,increase the accuracy of day-ahead scheduling,and lower the final product error of the thermal electricity unit.

关键词： High energy load of electrofused magnesium wind energy consumption thermal power unit wind power uncertainty two-layer optimization

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Arabidopsis WRKY1 promotes monocarpic senescence by integrative regulation of flowering,leaf senescence,and nitrogen remobilization

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Molecular Plant 2024年第8期17卷 1289-1306页

作者： Wei Zhang Shufei Tang Xuying li Yuanyuan Chen Jiajia li Yuyang Wang Ruichao bian Ying Jin Xiaoxian Zhu Kewei Zhang Zhejiang Provincial Key Laboratory of Biotechnology on Specialty Economic Plants College of Life SciencesZhejiang Normal UniversityJinhuaZhejiang 321004P.R.China

Monocarpic senescence,characterized by whole-plant senescence following a single flowering phase,is widespread in seed plants,particularly in crops,determining seed harvest time and ***,how external and internal signals are systemically integrated into monocarpic senescence remains largely ***,we report that the Arabidopsis thaliana transcription factor WRKY1 plays essential roles in multiple key steps of monocarpic ***1 expression is induced by age,salicylic acid(SA),and nitrogen(N)*** and leaf senescence are accelerated in the WRKY1 overexpression lines but are delayed in the wrky1 *** combined DNA affinity purification sequencing and RNA sequencing analyses uncover the direct target genes of *** studies show that WRKY1 coordinately regulates three processes in monocarpic senescence:(1)suppressing FLOWERING LOCUS C gene expression to initiate flowering,(2)inducing SA biosynthesis genes to promote leaf senescence,and(3)activating the N assimilation and transport genes to trigger N *** summary,our study reveals how one stress-responsive transcription factor,WRKY1,integrates flowering,leaf senescence,and N remobilization processes into monocarpic senescence,providing important insights into plant lifetime regulation.

关键词： monocarpic senescence leaf senescence flowering time nitrogen remobilization salicylic acid WRKY transcription factor

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Heterogeneous integration of 2D materials on Si charge-coupled devices as optical memory

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Science China(Information Sciences) 2024年第6期67卷 190-197页

作者： Zheng bian Feng TIAN Zongwen li Xiangwei SU Tianjiao ZHANG Jialei MIAO Bin YU Yang XU Yuda ZHAO College of Integrated Circuits Hangzhou Global Scientific and Technological Innovation CentreZhejiang University

Optical memory integrates the function of optical sensing in memory devices, remarkably promoting the interconnection between sensory and memory terminals. Silicon charge-coupled photodetectors and floating gate memory have been widely used in imaging and storage technologies, respectively. However,the heterogeneous integration of the two devices requires technological innovation and complex electrical connections. In this work, we adopt a three-dimensional layer stacking method to design a novel optical memory device. On the top of Si charge-coupled photodetectors, we successively deposit two-dimensional graphene,hexagonal boron nitride, and molybdenum disulfide as a floating gate layer, a tunneling layer, and a readout layer, respectively. By applying a gate bias on lightly doped Si, a deep depletion layer is formed with a high voltage potential drop. Under dark conditions, the depletion layer cannot be filled, and the electric field across the h-BN tunnel barrier is relatively small. Under light irradiation, the deep depletion layer is gradually filled, and the h-BN tunneling layer withstands the increasing electric field, resulting in charge storage in the floating gate layer. Based on this mechanism, the device exhibits a gate voltage-dependent operation mode, including an integrated optical sensing-memory mode and an electrically driven storage mode. Under moderate gate voltage, the device can effectively detect the optical information with varied intensity and store the optical information in the floating gate, displaying optically controlled memory characteristics. Our work demonstrates a compact device structure for optical memory and displays excellent optically controlled memory performance, which can be applied in artificial vision systems.

关键词： heterogeneous integration charge-coupled device floating gate optical memory molybdenum disulfide lightly doped silicon

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Autophagy receptor ZmNBR1 promotes the autophagic degradation of ZmBRI1a and enhances drought tolerance in maize

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Journal of Integrative Plant Biology 2024年第6期66卷 1068-1086页

作者： Yang Xiang Guangdong li Qian li Yingxue Niu Yitian Pan Yuan Cheng Xiangli bian Chongyang Zhao Yuanhong Wang Aying Zhang College of life Sciences Nanjing Agricultural UniversityNanjing210095 China State Key Laboratory of Crop Genetics&Germplasm Enhancement and Utilization Nanjing Agricultural UniversityNanjing210095 China Sanya Institute of Nanjing Agricultural University Nanjing Agricultural UniversitySanya572025 China

Drought stress is a crucial environmental factor that limits plant growth,development,and *** of misfolded proteins can help alleviate the damage caused in plants experiencing ***,the mechanism of autophagy-mediated drought tolerance in plants remains largely ***,we cloned the gene for a maize(Zea mays)selective autophagy receptor,NEXT TO BRCA1GENE 1(ZmNBR1),and identified its role in the response to drought *** observed that drought stress increased the accumulation of *** sequencing and reverse transcriptionquantitative polymerase chain reaction showed that ZmNBR1 is markedly induced by drought ***1 overexpression enhanced drought tolerance,while its knockdown reduced drought tolerance in *** results established that ZmNBR1 mediates the increase in autophagosomes and autophagic activity under drought ***1 also affects the expression of genes related to autophagy under drought ***,we determined that BRASSINOSTEROID INSENSITIVE1A(ZmBRI1a),a brassinosteroid receptor of the BRI1-like family,interacts with *** analysis showed that ZmBRI1a negatively regulates drought tolerance in maize,and genetic analysis indicated that ZmNBR1 acts upstream of ZmBRI1a in regulating drought ***,ZmNBR1facilitates the autophagic degradation of ZmBRI1a under drought *** together,our results reveal that ZmNBR1 regulates the expression of autophagy-related genes,thereby increasing autophagic activity and promoting the autophagic degradation of ZmBRI1a under drought stress,thus enhancing drought tolerance in *** findings provide new insights into the autophagy degradation of brassinosteroid signaling components by the autophagy receptor NBR1 under drought stress.

关键词： autophagy receptor drought tolerance Zea mays ZmBRI1a ZmNBR1

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