检索结果-南通市图书馆

Investigation of oxidative potential of fresh and O_(3)-aging PM_(2.5)from various emission sources across urban and rural regions

引用

Journal of Environmental Sciences 2025年第5期151卷 608-615页

作者： Shuaishuai Ma Dongsheng Cheng Yingying Tang Younuo Fan Qiong li Chengxiang He Zhiqing zhao Tianyou Xu College of Chemical and Material Engineering Quzhou UniversityQuzhou 324000China Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention Department of Environmental Science&EngineeringFudan UniversityShanghai 200433China

Inhalation of atmospheric PM_(2.5)can induce the generation of excessive reactive oxygen species(ROS)in human alveoli,triggering local and systemic inflammation,which can directly or indirectly result in respiratory and cardiovascular *** this study,we assessed the oxidative potential(OP)of fresh and O_(3)-aged PM_(2.5)particles from various urban and rural emission sources using the dithiothreitol(DTT)*** results revealed variations in the OP of fresh PM_(2.5)among different emission sources,with biomass burning sources exhibiting the highest OP,followed by industrial areas,vehicular emissions,cooking emissions,and suburban areas,***-soluble organics and transition metals might potentially exert significant influence on particle OP.O_(3)aging notably decreased the OP of PM_(2.5)particles,possibly due to the oxidation of highly DTT-active components into low redox-active small ***,the evolution of OP in different PM_(2.5)components,including methanol-soluble and insoluble fractions,exhibited distinct responses to O_(3)aging for source-oriented PM_(2.5).Additionally,differences in chemical composition between fresh and aged PM_(2.5)were further elucidated through measurements of component-dependent hygroscopic behaviors and phase *** study systematically delineates variances in the toxic potential of fresh and O_(3)-aged PM_(2.5)from various anthropogenic *** findings highlight the intrinsic compositional dependence of particle OP and provide essential insights for assessing the health effects of source-oriented PM_(2.5),as well as for formulating human health protection policies.

关键词： Atmospheric PM_(2.5) Oxidative potential Emission sources DTT assay O_(3)aging

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Introducing strong metal–oxygen bonds to suppress the Jahn-Teller effect and enhance the structural stability of Ni/Co-free Mn-based layered oxide cathodes for potassium-ion batteries

引用

Journal of Energy Chemistry 2025年第2期101卷 713-722页

作者： Yicheng lin Shaohua Luo Pengyu li Jun Cong Wei zhao lixiong Qian Qi Sun Shengxue Yan School of Materials Science and Engineering Northeastern University School of Resources and Materials Northeastern University at Qinhuangdao Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province

Mn-based layered oxides（KMO） have emerged as one of the promising low-cost cathodes for potassiumion batteries（PIBs）.However,due to the multiple-phase transitions and the distortion in the MnO6structure induced by the Jahn-Teller（JT） effect associated with Mn-ion,the cathode exhibits poor structural ***,we propose a strategy to enhance structural stability by introducing robust metal-oxygen（M-O） bonds,which can realize the pinning effect to constrain the distortion in the transition metal（TM） ***,all the elements employed have exceptionally high crustal *** a proof of concept,the designed K0.5Mn0.9Mg0.025Ti0.025Al0.05O2cathode exhibited a discharge capacity of approximately 100 mA h g-1at 20 mA g-1with 79% capacity retention over 50 cycles,and 73% capacity retention over 200 cycles at 200 mA g-1,showcased much better battery performance than the designed cathode with less robust M-O *** properties of the formed M-O bonds were investigated using theoretical *** enhanced dynamics,mitigated JT effect,and improved structural stability were elucidated through the in-situ X-ray diffractometer（XRD）,in-situ electrochemical impedance spectroscopy（EIS）(and distribution of relaxation times（DRT） method),and ex-situ X-ray absorption fine structure（XAFS） *** study holds substantial reference value for the future design of costeffective Mn-based layered cathodes for PIBs.

关键词： Jahn-Teller effect Layered oxide cathodes Low-cost Potassium-ion batteries Robust M–O bonds

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Enhancing performance of fullerene-based organic electrochemical transistors via side-chain engineering

引用

Nano Research 2025年第2期18卷 905-912页

作者： Wenxin Fang Zijie li Chengdong Wang Xiaowei zhao Junyu li Gang Ye Fengwei Huo li Qiu Yanxi Zhang Wei Huang Institute of Flexible Electronics(IFE Future Technologies)Xiamen UniversityXiamen 361005China Yunnan Key Laboratory of Electromagnetic Materials and Devices National Center for International Research on Photoelectric and Energy MaterialsSchool of Materials and EnergyYunnan UniversityKunming 650091China Sinopec Shanghai Research Institute of Petrochemical Technology Shanghai 201028China Key Laboratory for the Green Preparation and Application of Functional Materials Hubei Key Laboratory of Polymer MaterialsSchool of Materials Science and EngineeringHubei UniversityWuhan 430062China Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing Tech University(NanjingTech)Nanjing 211800China Frontiers Science Center for Flexible Electronics MIIT Key Laboratory of Flexible Electronics(KLoFE)Northwestern Polytechnical UniversityXi'an 710072China

The performance of organic electrochemical transistors(OECTs)relies on the interaction between organic semiconductors and ***,hydrophilic ethylene glycol(EG)side chains are incorporated into organic semiconductors to improve the channel’s capacity to absorb ***,the EG substituted organic semiconductors tend to swell when immersed in aqueous electrolytes and exhibit microstructural changes induced by dopant *** our research,we introduce an alkyl spacer to create distance between the fullerene and EG *** approach is designed to reduce the negative effects of swelling and balance the ion and electron *** conducted an analysis of OECTs using four fullerene derivatives:no alkyl spacer,butyl,hexyl,and octyl *** OECTs based on fullerene derivatives with butyl and hexyl spacers exhibit enhanced transconductance(g_(m)=11.8 and 19.4 mS)compared to the ones without alkyl *** has also been observed that the butyl and hexyl spacers lead to a more than tenfold increase in volumetric *** increasing the alkyl spacer(octyl group)leads to no transistor *** study uncovers the relationship between alkyl spacers and the performance of OECTs based on fullerene *** will serve as a guideline for designing n-type small molecules for ***,we showcased the potential of utilizing OECTs based on these fullerene derivatives in cation sensing,which is promising for developing sweat sensors.

关键词： organic electrochemical transistors fullerene derivatives ethylene glycol side chains ion and electron conduction

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Recent advancements in noble-metal electrocatalysts for alkaline hydrogen evolution reaction

引用

Chinese Chemical Letters 2025年第1期36卷 176-200页

作者： Guoliang Gao Guangzhen zhao Guang Zhu Bowen Sun Zixu Sun Shunli li Ya-Qian Lan Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institutes Suzhou UniversitySuzhou 234000China Key Laboratory for Special Functional Materials of Ministry of Education School of Materials Science and EngineeringHenan UniversityKaifeng 475004China School of Chemistry South China Normal UniversityGuangzhou 510006China

Available online Alkaline water electrolysis(AWE)is a prominent technique for obtaining a sustainable hydrogen source and effectively managing the energy *** metal-based electrocatalysts,owing to their exceptional hydrogen binding energy,exhibit remarkable catalytic activity and long-term stability in the hydrogen evolution reaction(HER).However,the restricted accessibility and exorbitant cost of noble-metal materials pose obstacles to their extensive adoption in industrial *** review investigates strategies aimed at reducing the dependence on noble-metal electrocatalysts and developing a cost-effective alkaline HER catalyst,while considering the principles of sustainable *** initial discussion covers the fundamental principle of HER,followed by an overview of prevalent techniques for synthesizing catalysts based on noble metals,along with a thorough examination of recent *** subsequent discussion focuses on the strategies employed to improve noble metalbased catalysts,including enhancing the intrinsic activity at active sites and increasing the quantity of active ***,this investigation concludes by examining the present state and future direction of research in the field of electrocatalysis for the HER.

关键词： Hydrogen evolution reaction Alkaline water electrolysis Electrocatalysts Noble metal-based Synthesis method Modification strategy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Detection and interpretation of the time-varying seasonal signals in China with multi-geodetic measurements

引用

Geodesy and Geodynamics 2025年第1期16卷 42-54页

作者： liansheng Deng Yugang Xiao Qusen Chen Wei Peng zhao li Hua Chen Zhiwen Wu School of Electrical and Electronic Information Engineering Hubei Polytechnic University Hubei Luojia Laboratory GNSS Research Center Wuhan University Changjiang Spatial Information Technology Engineering Co. Ltd. Key Laboratory of Spatial Data Mining & Information Sharing of the Ministry of Education Fuzhou University School of Geodesy and Geomatics Wuhan University The First Surveying and Mapping Institute of Hunan Province

The time-varying periodic variations in Global Navigation Satellite System(GNSS) stations affect the reliable time series analysis and appropriate geophysical interpretation. In this study, we apply the singular spectrum analysis(SSA) method to characterize and interpret the periodic patterns of GNSS deformations in China using multiple geodetic datasets. These include 23-year observations from the Crustal Movement Observation Network of China(CMONOC), displacements inferred from the Gravity Recovery and Climate Experiment(GRACE), and loadings derived from Geophysical models(GM). The results reveal that all CMONOC time series exhibit seasonal signals characterized by amplitude and phase modulations, and the SSA method outperforms the traditional least squares fitting(LSF) method in extracting and interpreting the time-varying seasonal signals from the original time series. The decrease in the root mean square(RMS) correlates well with the annual cycle variance estimated by the SSA method, and the average reduction in noise amplitudes is nearly twice as much for SSA filtered results compared with those from the LSF method. With SSA analysis,the time-varying seasonal signals for all the selected stations can be identified in the reconstructed components corresponding to the first ten eigenvalues. Moreover, both RMS reduction and correlation analysis imply the advantages of GRACE solutions in explaining the GNSS periodic variations,and the geophysical effects can account for 71% of the GNSS annual amplitudes, and the average RMS reduction is 15%. The SSA method has proved to be useful for investigating the GNSS timevarying seasonal signals. It could be applicable as an auxiliary tool in the improvement of nonlinear variations investigations.

关键词： GNSS coordinate time series Singular spectrum analysis Time-varying seasonal signals Loading effects GRACE

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Tectonic Evolution of the Ailao Shan-Red River Fault since the Middle Miocene from Apatite Fission Track Thermochronology and its Implications for Tibetan Plateau Growth

引用

Acta Geologica Sinica(English Edition) 2025年第1期99卷 126-143页

作者： GONG Wei li Chaoyang JIANG liang WANG Yuyan li Hongyu zhao lihong zhao Faqiang Key Laboratory of Submarine Geosciences and Prospecting Techniques Ministry of Education and College of Marine GeosciencesOcean University of ChinaQingdaoShandong 266100China Laboratory for Marine Mineral Resources Qingdao Marine Science and Technology CenterQingdaoShandong 266237China College of Earth Science and Engineering Shandong University of Science and TechnologyQingdaoShandong 266590China Shandong Institute of Geophysical and Geochemical Exploration Jinan 250013China

The temporal and spatial evolution of the Ailao Shan-Red River(ASRR)fault zone,which serves as an important accommodation zone for the extrusion and escape of the Southeastern Tibetan Plateau,is crucial for analyzing the uplift and growth of the *** on the petrology and apatite fission track analysis,the tectonic history and active pattern of the ASRR fault zone since the middle Miocene are determined in this *** ASRR fault zone exhibits 12-8Ma and 8-4 Ma rapid cooling phases since the middle *** 12-8 Ma and 8-4 Ma cooling may imply that the dextral movement of the ASRR fault zone presents a migration trend from northwest to southeast,accompanied by the weakening of the activity intensity,which is directly related to deformation processes,including extrusion boundary migration and active tectonic movements of the southeastern Tibetan Plateau,since the middle-late Miocene.

关键词： apatite fission track extrusion tectonics middle Miocene Ailao Shan-Red River fault zone Tibetan Plateau

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Study and application of the influence of inclination angle on the cross-fusion mechanism of high gas thick coal seam

引用

International Journal of Mining Science and Technology 2025年第1期35卷 69-85页

作者： Pengxiang zhao Zechen Chang Shugang li Risheng Zhuo Yongyong Jia Qiudong Shao Wen Lei College of Safety Science and Engineering Xi'an University of Science and TechnologyXi’an 710054China Western Mining Gas Intelligent Extraction Engineering Research Centre Xi’an 710054China xinjiang Coal and Coalbed Methane Engineering Technology Research Centre Urumqi 830091China xinjiang Key Laboratory of Coal Mine Disaster Intelligent Prevention and Emergency Response Xinjiang Institute of EngineeringUrumqi 830023China xinjiang Uygur Autonomous Region Coal Science Research Institute Urumqi 830091China xinjiang Changji Heze Tengda Mining Co. Ltd.Changji 831100China

In this study,to better decide the effect of coal seam dip angle upon the dynamic change of the crossfusion in gas transport and storage areas during the progress of working face in the high gas thick coal seam,a two-dimensional physical simulation experiment regarded as the theoretical research was conducted to properly explore the variation law of overburden *** results demonstrated that the boundary of the gas transport zone was located in the region of fracture *** boundary of the gas storage area was located in the abrupt penetration ***,according to the information theory,the state of the gas transport and storage areas was determined by the changing trend of the fracture rate and fracture *** mathematical representation model of the dip effect in gas transport and storage areas was *** criteria upon which the regional location of the gas transport area and gas storage area can be based were put *** cross-fusion evolution process of the dip effect in gas transport and storage areas was revealed as *** research results could provide guidance for realising directional and accurate gas extraction.

关键词： Coal seam dip angle Cross fusion High gas thick coal seam Overburden fracture Gas transport and storage areas

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Changes in River Cross-section Morphology and Response to Streamflow and Sediment Processes in Middle Reaches of Yellow River,China

引用

Chinese Geographical Science 2025年第1期35卷 161-174页

作者： WEN Yongfu li Pengfei li Mengzhen MA Chaohui GAO Peng MU xingmin zhao Guangju The Research Center of Soil and Water Conservation and Ecological Environment Chinese Academy of Sciences and Ministry of EducationYangling 712100China Institute of Soil and Water Conservation Chinese Academy of Sciences&Ministry of Water ResourcesYangling 712100China University of Chinese Academy of Sciences Beijing 100049China Hebei University of Water Resources and Electric Engineering Cangzhou 061001China Xi’an University of Science and Technology Xi’an 710054China Institute of Soil and Water Conservation Northwest A&F UniversityYangling 712100China

Changes in river cross-section morphology have decisive influences on the flood discharge and sand transport capacity of rivers;thus,these changes strongly reflect the vitality of a *** this paper,based on the river cross-section and water and sediment data of two different periods(1974−1987 and 2007−2021),the trend analysis,change-point analysis and sediment rating curve method were used to analyze the change process of river cross-section morphology and its response to streamflow and sediment changes in the main river stream of the Yellow River at the Longmen hydrological *** 1974 to 1987(except in 1977),the riverbed experi-enced siltation,and the riverbed elevation ***,from 2007 to 2021,the riverbed experienced scouring,and the riverbed el-evation gradually *** cross-section shape changed from rectangular to U-shaped(deeper on the right side)at the Longmen *** changes in streamflow and sediment processes significantly impacted the evolution of river ***-flow(Pline in riverbed elevation at the Longmen cross-section from 2007 to *** findings help us better understand the impacts of ecological restoration on changes in river streamflow and sediment during river evolution.

关键词： cross-section shape riverbed elevation water depth streamflow sediment discharge eco-restoration Longmen station middle reaches of the Yellow River,China

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Soliton resolution for the energy-critical wave equation with an inverse-square potential in the radial case

引用

Science China Mathematics 2025年

作者： Xuanying li Changxing Miao lifeng zhao School of Mathematical Sciences University of Science and Technology of China Institute of Applied Physics and Computational Mathematics

In this paper, we present the soliton resolution for the energy-critical wave equation with an inverse square potential in the radial case and all dimensions N≥3. A crucial ingredient of our analysis involves the energy channel for the linearized wave equation with inverse square potentials, which incorporates the distorted Hankel transform.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

酸洗去除冶金硅中的典型杂质

引用

中国有色金属学报 2011年第8期21卷 1988-1996页

作者：李成义赵立新王志郭占成王永刚中国矿业大学化学与环境工程学院北京100083 中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室北京100190 中国科学院研究生院北京100049

以王水和氢氟酸为酸洗介质,研究酸洗对冶金硅中典型杂质元素的脱除效果。结果表明:王水和氢氟酸对金属类杂质均有明显的去除作用,但对非金属B和P去除效率差。Al杂质经王水和氢氟酸酸洗后去除率分别为80%和86.3%,Fe杂质的去除率分别为78... 详细信息

以王水和氢氟酸为酸洗介质,研究酸洗对冶金硅中典型杂质元素的脱除效果。结果表明:王水和氢氟酸对金属类杂质均有明显的去除作用,但对非金属B和P去除效率差。Al杂质经王水和氢氟酸酸洗后去除率分别为80%和86.3%,Fe杂质的去除率分别为78.6%和89.4%。氢氟酸对总杂质去除率比王水提高12%,但其对Cu的去除率仅为4.8%。Cu的相态分析表明:Cu在冶金硅中主要是以Al-Si-Cu合金相存在,抗氢氟酸腐蚀性强。与氢氟酸不同,王水通过化学破碎作用使硅粉粒度变小,利于杂质相暴露。两种酸对硅粉的损失率均小于3.5%。

关键词：冶金硅酸洗提纯杂质相

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：