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Construction of eco-friendly dual carbon dots ratiometric fluorescence probe for highly selective and efficient sensing mercury ion

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Journal of Environmental Sciences 2025年第2期148卷 1-12页

作者： Yongli liu Xiaoyan Su Huanjia liu Guifen Zhu Guobei Ge Yuxin Wang Penghui Zhou Qingxiang Zhou School of Environment Henan Key Laboratory for Environmental Pollution ControlKey Laboratory for Yellow River and Huai River Water Environmental and Pollution ControlMinistry of EducationHenan Normal UniversityXinxiang 453007China College of Chemical Engineering and Environment China University of Petroleum-BeijingBeijing 102249China

In present work,blue carbon dots(b-CDs)were derived from ammonium citrate and guanidine hydrochloride,and red carbon dots(r-CDs)were stemmed from malonate,ethylenediamine and meso-tetra(4-carboxyphenyl)porphin based on facile hydrothermal ***-friendly ratiometric fluorescence probe was innovatively constructed to effectively measure Hg2+utilizing b-CDs and *** developed probe displayed two typical emission peaks at 450 nm from b-CDs and 650 nm from r-CDs under the excitation at 360 *** ion has strong quenching effect on the fluorescence intensity at 450 nm due to the electron transfer process and the fluorescence change at 450 nm was used as the response signal,whereas the fluorescence intensity at 650 nm kept unchangeable which resulted from the chemical inertness between Hg^(2+)and r-CDs,serving as the reference signal in the sensing *** optimal circumstances,this probe exhibited an excellent linearity between the fluorescence response values of F450/F650 and Hg^(2+)concentrations over range of 0.01-10μmol/L,and the limit of detectionwas down to 5.3 nmol/***,this probe was successfully employed for sensing Hg^(2+)in practical environmental water samples with satisfied recoveries of 98.5%-105.0%.The constructed ratiometric fluorescent probe provided a rapid,environmental-friendly,reliable,and efficient platform for measuring trace Hg^(2+)in environmental field.

关键词： Blue carbon dots Red carbon dots Electron transfer Hg^(2+) Eco-friendliness

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New progresses of fine-grained sediment gravity-flow deposits and their importance for unconventional shale oil and gas plays

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Petroleum Science 2025年第1期22卷 1-15页

作者： Tian Yang Ying-Lin liu State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Chengdu University of Technology) Institute of Sedimentary Geology Key Laboratory of Deep-time Geography and Environment Reconstruction and Applications of Ministry of Natural Resources Chengdu University of Technology

Fine-grained sediments are widely distributed and constitute the most abundant component in sedimentary systems, thus the research on their genesis and distribution is of great significance. In recent years, fine-grained sediment gravity-flows(FGSGF) have been recognized as an important transportation and depositional mechanism for accumulating thick successions of fine-grained sediments. Through a comprehensive review and synthesis of global research on FGSGF deposition, the characteristics,depositional mechanisms, and distribution patterns of fine-grained sediment gravity-flow deposits(FGSGFD) are discussed, and future research prospects are clarified. In addition to the traditionally recognized low-density turbidity current and muddy debris flow, wave-enhanced gravity flow, lowdensity muddy hyperpycnal flow, and hypopycnal plumes can all form widely distributed FGSGFD. At the same time, the evolution of FGSGF during transportation can result in transitional and hybrid gravityflow deposits. The combination of multiple triggering mechanisms promotes the widespread development of FGSGFD, without temporal and spatial limitations. Different types and concentrations of clay minerals, organic matters, and organo-clay complexes are the keys to controlling the flow transformation of FGSGF from low-concentration turbidity currents to high-concentration muddy debris flows. Further study is needed on the interaction mechanism of FGSGF caused by different initiations, the evolution of FGSGF with the effect of organic-inorganic synergy, and the controlling factors of the distribution patterns of FGSGFD. The study of FGSGFD can shed some new light on the formation of widely developed thin-bedded siltstones within shales. At the same time, these insights may broaden the exploration scope of shale oil and gas, which have important geological significances for unconventional shale oil and gas.

关键词： Fine-grained sediment gravity-flow Depositional mechanism Transportation and evolution Distribution pattern Shale oil and gas

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Plasmon-induced local electric field improved hydrogen evolution reaction on Ag/Mo_(2)C nanosheets

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Nano Research 2025年第1期18卷 270-277页

作者： HuangJingWei Li Xin Zi Jun Wu Xinli Wang Li Zhu Qiyou Wang Jianfu Han Junwei Fu Hongmei Li kai Huang Yu Chen Min liu School of Physics State Key Laboratory of Powder MetallurgyHunan Joint International Research Center for Carbon Dioxide Resource UtilizationCentral South UniversityChangsha 410083China School of Metallurgy and Environment Central South UniversityChangsha 410083China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Nano-Institute Munich Faculty of PhysicsLudwig-Maxilimians-Universität MünchenMünchen 80539Germany Hunan Institute of Advanced Sensing and Information Technology Xiangtan UniversityXiangtan 411105China

Electrocatalytic water splitting offers a promising way for hydrogen production with near-zero ***,such as molybdenum carbides(Mo_(2)C),are promising materials for hydrogen evolution reaction(HER)but still suffer from poor intrinsic water activation ***,we developed a plasmon-induced local electric field(PILEF)strategy to solve this ***(Ag)nanoparticles decorated Mo_(2)C nanosheets(Ag/Mo_(2)C)were successfully prepared by electrostatic *** visible light excited the PILEF on Ag/Mo_(2)C remarkably reducing the activation energy by 92.7 kJ·mol^(-1)from 147.3 kJ·mol^(-1)of Mo_(2)C to 54.6 kJ·mol^(-1).As a result,the plasmonic Ag/Mo_(2)C significantly enhances~2.3-fold of the current density from 2.8 mA·cm^(-2)of Mo_(2)C to 6.5 mA·cm^(-2)at-3 V *** and reduces the overpotential by 104 mV from 403 mV of dark state to 299 mV of light state at the current density of 10 mA·cm^(-2),achieving better performance than reported *** research demonstrates that PILEF enhances HER activities,offering a potential strategy for boosting the intrinsic activities of catalysts.

关键词： sliver particles plasmon effect field effect hydrogen evolution reaction(HER) electrocatalysis

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Allelic variation in the promoter of WRKY22 enhances humid adaptation of Arabidopsis thaliana

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Molecular Plant 2025年第1期18卷 42-58页

作者： Ruyun Liang Luna Tan Xiang Guo Shangling Lou Xuming Dan Yu Han Cheng Zeng Han Zhang kai Yang Liyang Chen Xin Liang Meng liu Mengyun Guo Kangqun Yin Si Tang Yan Song Xuemeng Gao Shaobo Gu Jing Hou Yingjun Yao Ruijia Zhang Jin Yan Wensen Fu Xuerui Li Yongqi Hu Yao liu Wei liu Qiusai Wu Zhen Yan Weitao Jia Binhua Hu Jing Wang Jianquan liu Huanhuan liu Key Laboratory for Bio-resources and Eco-environment&State Key Lab of Hydraulics&Mountain River Engineering Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research StationKey Laboratory for Bio-resource and Eco-environment of Ministry of EducationCollege of Life SciencesSichuan UniversityChengdu 610065China Institute of Biotechnology and Nuclear Technology Sichuan Academy of Agricultural SciencesChengduSichuan 610066China Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqingChina

Submergence stress tolerance is a complex trait governed by multiple *** of its wide distribution across arid and humid regions,Arabidopsis thaliana offers an opportunity to explore the genetic components and their action mechanisms underlying plant adaptation to submergence *** this study,using map-based cloning we identified WRKY22 that activates RAP2.12,a locus previously identified to contribute to the submergence stress response,to regulate plant humid adaptation possibly through ethylene signal transduction in ***22 expression is inhibited by ARABIDOPSIS RESPONSE REGULATORs(ARRs)but activated by the WRKY70 transcription *** accessions from humid environments,a two-nucleotide deletion in the WRKY22 promoter region prevents binding of phosphorylated ARRs,thereby maintaining its high *** of the ARR-binding element in the WRKY22 promoter underwent strong positive selection during colonization of *** in the humid Yangtze River ***,the WRKY70-binding motif in the WRKY22 promoter shows no variation between accessions from humid and arid *** findings together establish a novel signaling axis wherein WRKY22 plays a key role in regulating the adaptive response that enables *** to colonize contrasting ***,we further showed functional conservation of this locus in Brassica napus,suggesting that modulating this axis might be useful in the breeding of flood-tolerant crop varieties.

关键词： WRKY22 RAP2.12 WRKY70 ARRs natural variation submergence tolerance

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基于异构扩散模型的输油管道缺陷及组件检测方法

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控制与决策 2025年第3期40卷 937-945页

作者：神祥凯刘金海东北大学信息科学与工程学院

高精度的缺陷检测和组件检测对确保管道的安全运行至关重要.针对现有检测方法存在精度低和泛化性差的难题,提出一种基于异构扩散模型的新型管道缺陷和组件检测方法.首先,将原始的漏磁信号预处理以降低信号采集中噪声等负面因素的影响;其... 详细信息

高精度的缺陷检测和组件检测对确保管道的安全运行至关重要.针对现有检测方法存在精度低和泛化性差的难题,提出一种基于异构扩散模型的新型管道缺陷和组件检测方法.首先,将原始的漏磁信号预处理以降低信号采集中噪声等负面因素的影响;其次,针对特征提取困难的问题,设计一种基于稀疏注意力模块的特征提取方法,通过稀疏化的方式建立漏磁信号间的长距离依赖关系,进而实现模型对缺陷和组件的信息聚焦;此外,将传统的特征金字塔网络替换为路径聚合特征金字塔网络,充分确保多尺度特征的完备性;最后,设计一种基于异构扩散模型的检测机制,将候选框回归过程转换为随机框的去噪过程,减少模型对预先设定的锚点的依赖,进而提升模型的泛化性和准确性.基于实际管道对其有效性进行验证,实验结果表明,所提出方法的平均检测精度达到97.4%,优于最先进的对比方法 3.5%,确保了其在应用中的前景.

关键词：漏磁检测管道缺陷检测管道组件检测卷积神经网络注意力机制扩散模型

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Three-step synthesis of flavanostilbenes with a 2-cyclohepten-1-one core by Cu-mediated [5+2] cycloaddition/decarboxylation cascade

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Chinese Chemical Letters 2025年第2期36卷 378-383页

作者： Gangsheng Li Xiang Yuan Fu liu Zhihua liu Xujie Wang Yuanyuan liu Yanmin Chen Tingting Wang Yanan Yang Peicheng Zhang State Key Laboratory of Bioactive Substance and Function of Natural Medicines Institute of Materia MedicaChinese Academy of Medical Sciences and Peking Union Medical College Beijing Wehand-Bio Pharmaceutical Co. Ltd.

The first synthesis of flavanostilbenes with a 2-cyclohepten-1-one core was carried out by applying an effective strategy in three steps from abundant polymerized flavanol resources. A key regio-and stereoselective Cu-mediated [5+2] cycloaddition/decarboxylation cascade was explored and applied without the use of protecting groups, and water as an environmentally friendly solvent contributed to the cascade. The intramolecular [5+2] cycloaddition mechanism, involving oxidation and dearomatization of the flavanol unit as a diene, was proposed and supported by the synthesis of the intermediate. The regioselectivity of the cyclization was found to be dependent on the substitution effects of the stilbene units by the exploration of substrate scope.

关键词： Biomimetic synthesis Copper Natural products Substrate [5 + 2] Cycloaddition

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Anti-Swelling Polyelectrolyte Hydrogel with Submillimeter Lateral Confinement for Osmotic Energy Conversion

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Nano-Micro Letters 2025年第4期17卷 96-110页

作者： Yongxu liu Jiangnan Song Zhen liu Jialin Chen Dejuan Wang Hui Zhi Jiebin Tang Yafang Zhang Ningbo Li Weijia Zhou Meng An Hong liu Guobin Xue Institute for Advanced Interdisciplinary Research(iAIR) School of Chemistry and Chemical EngineeringUniversity of JinanJinan 250022People’s Republic of China College of Mechanical and Electrical Engineering Shaanxi University of Science and TechnologyXi’an 710021People’s Republic of China School of Physics and Technology University of JinanJinan 250022People’s Republic of China State Key Laboratory of Crystal Materials Shandong University27 Shandanan RoadJinan 250100People’s Republic of China

Harvesting the immense and renewable osmotic energy with reverse electrodialysis(RED)technology shows great promise in dealing with the ever-growing energy *** key challenge is to improve the output power density with improved trade-off between membrane permeability and ***,polyelectrolyte hydrogels(channel width,2.2 nm)with inherent high ion conductivity have been demonstrated to enable excellent selective ion transfer when confined in cylindrical anodized aluminum pore with lateral size even up to the submillimeter scale(radius,0.1 mm).The membrane permeability of the anti-swelling hydrogel can also be further increased with cellulose *** real seawater and river water,the output power density of a three-chamber cell on behalf of repeat unit of RED system can reach up to 8.99 W m^(-2)(per unit total membrane area),much better than state-of-the-art *** work provides a new strategy for the preparation of polyelectrolyte hydrogel-based ion-selective membranes,owning broad application prospects in the fields of osmotic energy collection,electrodialysis,flow battery and so on.

关键词： Ionic polymer Hydrogel Confinement effect Anti-swelling Osmotic energy conversion

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Optimizing local search-based partial MaxSAT solving via initial assignment prediction

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Science China(Information Sciences) 2025年第2期68卷 59-73页

作者： Chanjuan liu Guangyuan liu Chuan LUO Shaowei CAI Zhendong LEI Wenjie ZHANG Yi CHU Guojing ZHANG School of Computer Science and Technology Dalian University of Technology School of Software Beihang University Institute of Software Chinese Academy of Sciences School of Computer Science Peking University

Partial maximum satisfiability(PMS) is a significant generalization of Boolean satisfiability(SAT) and maximum satisfiability(MaxSAT), by introducing hard clauses and soft clauses. Compared with SAT and MaxSAT, the PMS problem has more real-world applications where both hard and soft constraints are involved. Local search is an effective incomplete method for solving PMS and is useful for important domains where good-quality solutions are desired within reasonable *** local search PMS solvers, the approach for initial assignment generation is crucial because its effectiveness significantly affects practical performance. In this study, we propose a novel initial assignment prediction approach, called InitPMS. When predicting an assignment for PMS, InitPMS considers the specific structure of PMS instances, i.e., distinguishing hard and soft clauses. Our experiments on extensive PMS instances from MaxSAT evaluations(MSEs) 2020 and 2021 show that InitPMS significantly boosts the performance of five state-of-the-art local search PMS solvers, demonstrating its generality. In addition,our results indicate that incorporating InitPMS could improve the performance of one of the best incomplete PMS solvers in MaxSAT Evaluation 2021, indicating that InitPMS might help advance the state of the art in PMS solving.

关键词： MaxSAT local search initial assignment incomplete method assignment prediction

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High-resolution full waveform seismic imaging: Progresses, challenges, and prospects

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Science China Earth Sciences 2025年第2期68卷 315-342页

作者： Dinghui YANG Xingpeng DONG Jiandong HUANG Zhilong FANG Xueyuan HUANG Shaolin liu Mengxue liu Weijuan MENG Department of Mathematical Sciences Tsinghua UniversityBeijing 100084China Institute of Geology China Earthquake AdministrationBeijing 100029China School of Resources and Environment University of Electronic Science and Technology of ChinaChengdu 611731China School of Mathematics and Statistics Beijing Technology and Business UniversityBeijing 100048China National Institute of Natural Hazards Ministry of Emergency Management of ChinaBeijing 100085China

Full waveform inversion(FWI) is a seismic imaging method with a unified mathematical framework based on wave equation constraints. The FWI method can be used to generate a variety of high-resolution seismic parameter models(e.g.,velocity, anisotropy, viscoelasticity, and attenuation), which can facilitate an in-depth understanding of important scientific problems such as the Earth's interior structure and material composition, earthquake preparation and occurrence, and plate motion and dynamic processes. With the development and cross-integration of disciplines such as geophysics, applied mathematics, and computer science, FWI imaging theories and methods not only play a crucial role in revealing the Earth's interior structure, dynamic evolution, and earthquake mechanisms but also show a wide range of application potential in fields such as resource exploration, medical imaging, engineering inspection, carbon dioxide geological sequestration, and earthquake disaster prediction. In this paper, we provide a comprehensive review and analysis of the development of the FWI method,addressing its current challenges, identifying key issues, future directions, and potential research areas in the theory, methodology, and application of high-resolution FWI imaging. We also offer new insights and perspectives to promote advancements of high-resolution FWI research and applications in Earth sciences and other related fields.

关键词： Full waveform inversion High-resolution imaging Interior structure of the Earth Earthquake preparation me-chanism Multidisciplinary integration

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Reduction of thermal stratification due to global warming in winter and spring

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Journal of Oceanology and Limnology 2025年第1期43卷 1-15页

作者： Jie liu Jianming DENG Xiangming TANG State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China School of Geography and Ocean Science Nanjing UniversityNanjing 210023China

Global warming has been reported to enhance thermal stratification and decrease the mixlayer depth(MLD)in waters due to higher surface water temperatures,especially in *** studies were conducted for individual cases or specific *** present,there is a lack of global assessments on the influence of climate warming in different seasons on thermal *** ECMWF Reanalysis v5(ERA5)dataset was used to estimate the variability of water body mixing and its drivers in different seasons and *** indicate that global warming could enhance thermal stratification and decrease the MLD globally in *** speed was the primary driver of MLD changes,followed by ***,ice melt due to global warming enhanced the mixing in icecovered waters in the Northern Hemisphere,and early ice melt led to early *** depth was the primary driver of MLD changes in the Northern Hemisphere due to delayed ice formation and earlier melting,while wind speed was the primary driver in other regions or during ice-free *** enhanced mixing due to earlier ice melt out in late winter and early spring could promote water circulation and nutrient turnover,and replenish dissolved oxygen in deep water,thereby promoting the maximum biomass of cyanobacteria and advance harmful algal blooms.

关键词： global warming mix-layer depth(MLD) thermal stratification ice depth ECMWF Reanalysis v5(ERA5)dataset

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