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On the Specificity of Nanozymes: A Perspective

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Chinese Journal of Chemistry 2024年第13期42卷 1515-1522页

作者： Gen Wei Shuje Liu Yung-kang peng Hui Wei Department of Biomedical Engineering College of Engineering and Applied SciencesNanjing National Laboratory of MicrostructuresJiangsu Key Laboratory of Artificial Functional MaterialsNanjing UniversityNanjingJiangsu 21023China Department of Chemistry.City University of Hong Kong Hong Kong 999077Hong Kong SARChina State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical EngineeringChemistry and Biomedicine Innovation Center(ChemBIC)Nanjing UniversityNanjingJiangsu 210023China NMPA Key Laboratory for Biomedical Optics HangzhouZhejiang 310018China

We have compiled eight promising strategies for enhancing the specificity and selectivity of nanozymes,as depicted in the comprehensive summary *** exhibit intricate and sophisticated structures,including substrate channels and active sites,which can inform the design of *** of these structural features and the application of facet engineering/doping techniques can significantly enhance the catalytic specificity of ***,the use of Molecularly Imprinted Polymers(MiPs)to coat nanozymes represents an effective approach to impart substrate ***,several straightforward stopgap strategies have been devised to improve nanozyme specificity for analytical applications,such as the integration of biorecognition elements and nanozyme sensor arrays through surface modification.

关键词： Nanozymes Enzymes Catalytic activity Specificity Perspective

Effects of long-term fencing on soil microbial community structure and function in the desert steppe,China

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Journal of Arid Land 2024年第3期16卷 431-446页

作者： PAN Yaqing kang peng QU Xuan RAN Yichao LI Xinrong Shapotou Desert Research and Experiment Station Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China School of Biological Science and Engineering North Minzu UniversityYinchuan 750021China

One of the goals of grazing management in the desert steppe is to improve its ***,relatively little is known about soil microbe communities in the desert steppe ecosystem under grazing *** this study,we investigated the diversity and aboveground biomass of Caragana korshinskii *** communities in long-term fencing and grazing areas,combined with an analysis of soil physical-chemical properties and genomics,with the aim of understanding how fence management affects plant-soil-microbial inter-relationships in the desert steppe,*** results showed that fence management(exclosure)increased plant diversity and aboveground biomass in *** shrub area and effectively enhanced soil organic carbon(233.94%),available nitrogen(87.77%),and available phosphorus(53.67%)*** well,the Shannon indices of soil bacteria and fungi were greater in the fenced ***-soil changes profoundly affected the alpha-and beta-diversity of soil *** management also altered the soil microbial community structure,significantly increasing the relative abundances of Acidobacteriota(5.31%-8.99%),Chloroflexi(3.99%-5.58%),and Glomeromycota(1.37%-3.28%).The soil bacterial-fungal co-occurrence networks under fence management had higher complexity and *** on functional predictions,fence management significantly increased the relative abundance of bacteria with nitrification and nitrate reduction functions and decreased the relative abundance of bacteria with nitrate and nitrite respiration *** relative abundances of ecologically functional fungi with arbuscular mycorrhizal fungi,ectomycorrhizal fungi,and saprotrophs also significantly increased under fence *** addition,the differential functional groups of bacteria and fungi were closely related to plant-soil *** results of this study have significant positive implications for the ecological restoration and reconstruction of dry desert steppe and simila

关键词： desert steppe fence management Caragana korshinskii soil physical-chemical property soil microorganism

RuO_(2)/CoMO_(2)O_(x) Catalyst with Low Ruthenium Loading for Long-Term Acidic Oxygen Evolution

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Transactions of Tianjin University 2024年第5期30卷 395-405页

作者： Yingying Wang Hui Pan Zhikun Liu peng kang School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China

We must urgently synthesize highly efficient and stable oxygen-evolution reaction(OER) catalysts for acidic media. Herein, we constructed a series of Ti mesh(TM)-supported RuO_(2)/CoMo_(y)O_(x) catalysts(RuO_(2)/CoMo_(y)O_(x)/TM) with heterogeneous structures. By optimizing the ratio of Co to Mo, RuO_(2)/CoMO_(2)O_(x)/TM with low Ru loading(0.079 mg/cm^(2)) achieves remarkable OER performance(η = 243 mV at 10 mA/cm^(2)) and high stability(300 h @ 10 mA/cm^(2)) in 0.5 mol/L H_(2)SO_(4) electrolyte. The activity of RuO_(2)/CoMo_yO_x/TM can be maintained for 50 h at 100 mA/cm^(2), and a water electrolyzer with RuO_(2)/CoMO_(2)O_(x)/TM as anode can operate for 40 h at 100 mA/cm~2, suggesting the remarkable OER durability of RuO_(2)/CoMo__(y)O__(x)/TM in acidic electrolyte. Owing to the heterogeneous interface between CoMO_(2)O_(x) and RuO_(2), the electronic structure of Ru atoms was optimized and electron-rich Ru was formed. With modulated electronic properties, the dissociation energy of H_(2)O is weakened, and the OER barrier is lowered. This study provides the design of low-cost noble metal catalysts with long-term stability in an acidic environment.

关键词： Oxygen-evolution reaction Ru-based catalyst Acidic media Heterostructure Long-term electrolysis Low precious metal

Gamma Approximation Based Multi-Antenna Covert Communication Detection

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China Communications 2024年第9期21卷 90-97页

作者： Wan pengwu Chen Dongrui Wang Danyang Hui Xi peng kang School of Communications and Information Engineering&School of Artificial Intelligence Xi’an University of Posts and TelecommunicationsXi’an 710121China Key Laboratory of Integrated Service Networks School of Telecommunications EngineeringXidian UniversityXi’an 710071China

Covert communication technology makes wireless communication more secure,but it also provides more opportunities for illegal users to transmit harmful *** order to detect the illegal covert communication of the lawbreakers in real time for subsequent processing,this paper proposes a Gamma approximation-based detection method for multi-antenna covert communication ***,the Gamma approximation property is used to calculate the miss detection rate and false alarm rate of the monitor *** the optimization problem to minimize the sum of the missed detection rate and the false alarm rate is *** optimal detection threshold and the minimum error detection probability are solved according to the properties of the Lambert W ***,simulation results are given to demonstrate the effectiveness of the proposed method.

关键词： covert communication detection Gamma approximation Lambert W function multi-antenna technique

Progress and prospects of pH-neutral aqueous organic redox flow batteries:Electrolytes and membranes

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Journal of Energy Chemistry 2024年第9期96卷 89-109页

作者： kang peng Gonggen Tang Chao Zhang Xian Yang Peipei Zuo Zhanfeng Xiang Zhong Yao Zhengjin Yang Tongwen Xu Key Laboratory of Precision and Intelligent Chemistry Department of Applied ChemistrySchool of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026AnhuiChina Suqian Time Energy Storage Technology Co. Ltd.Suqian 223800JiangsuChina

Aqueous organic redox flow batteries(AORFBs),which exploit the reversible electrochemical reactions of water-soluble organic electrolytes to store electricity,have emerged as an efficient electrochemical energy storage technology for the grid-scale integration of renewable ***-neutral AORFBs that feature high safety,low corrosivity,and environmental benignity are particularly promising,and their battery performance is significantly impacted by redox-active molecules and ion-exchange membranes(IEMs).Here,representative anolytes and catholytes engineered for use in pH-neutral AORFBs are outlined and summarized,as well as their side reactions that cause irreversible battery capacity *** addition,the recent achievements of IEMs for pH-neutral AORFBs are discussed,with a focus on the construction and tuning of ion transport ***,the critical challenges and potential research opportunities for developing practically relevant pH-neutral AORFBs are presented.

关键词： Aqueous organic redox flow battery pH-Neutral Anolyte Catholyte Membrane

Preparation of three-dimensional nanoporous copper foil with high specific surface area

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Rare Metals 2024年第7期43卷 3430-3437页

作者： Ning Song Li-Juan Wang Jun-Feng Wang Juan Liao Jian Huang peng-kang Du Yun-Zhi Tang Yu-Hui Tan Xiao-Wei Fan Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry School of Chemistry and Chemical EngineeringJiangxi University of Science and TechnologyGanzhou 341000China

The porous copper foil material has the advantages of ultralight and ultra-thin,and can prevent dangers such as thermal runaway and battery fire,which could be regarded as a prospective material for lithium battery **... 详细信息

关键词： copper porous dimensional

Sedimentary evolution and mangrove dynamics in Dongzhai Harbor， Hainan Island since the Late Pleistocene

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Journal of Earth Science 2024年

作者： Xueyan Yan Yamin Deng Xianzhong Ke kang peng Xianjun Xie Yiqun Gan Qinghua Li Geological Survey， China University of Geosciences School of Environmental Studies， China University of Geosciences Wuhan Center of China Geological Survey (Central South China Innovation Center for Geosciences) Basin Water Environmental Research Department， Changjiang River Scientific Research Institute

Mangrove wetlands are a vital component of the blue carbon ecosystem， which is of great significance to coastal ecosystems and the global carbon balance. However， mangrove forests worldwide face a combination of natural and anthropogenic threats. This study employs high-resolution sedimentology， geochemistry， and pollen analysis to reveal the sedimentary evolution and vegetation succession in the mangrove wetland of Dongzhai Harbor， Hainan Island. By utilizing multiple proxies， including14C chronology， δ13C， C/N， and the chemical index of alteration （CIA）， we identified three distinct stages in the sedimentary records spanning from the Late Pleistocene to the modern age. Prior to the last glaciation， during the Late Pleistocene， the study area exhibited marine carbonate facies， with an abundance of marine-derived organic matter. During the low sea-level stage of last glaciation， the strata in the cored location were exposed. Following the last glaciation， the study area gradually transitioned into intertidal settings in response to fluctuating sea levels. Since the Middle Holocene or even earlier， sedimentary organic matter continued to accumulate as terrestrial C3 vegetation and mangrove forests established， persisted， and developed. This period witnessed the formation of the current estuarine environment. Simultaneously， the pioneering mangrove species， probably represented by Avicennia， might be initially established， followed by Rhizophora， Bruguiera and Ceriops communities， ultimately being replaced by Kandelia obovata to date. These findings not only fill the gap in the study of paleo-mangroves in China but also contribute valuable knowledge to the global reconstruction of paleo-mangroves， providing crucial reference for the conservation of mangroves and prediction of their responses in the context of climate change.

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辽宋金史学科七十年

中国史研究动态 2024年第2期 11-15页

作者：康鹏中国社会科学院古代史研究所北京100101

一个时代有一个时代的学术。古代史研究所(原历史研究所,2019年1月更名)辽宋金史学科历经七十载(1954—2024),其间兴衰起伏,在各个时期体现出不同的学术取向,折射出不同的时代韵律,今择要简述如下。一、初创期、蛰伏期(1951—1977)1954... 详细信息

一个时代有一个时代的学术。古代史研究所(原历史研究所,2019年1月更名)辽宋金史学科历经七十载(1954—2024),其间兴衰起伏,在各个时期体现出不同的学术取向,折射出不同的时代韵律,今择要简述如下。一、初创期、蛰伏期(1951—1977)1954年历史研究所建所至1977年,是辽宋金史学科的初创期、蛰伏期。中华人民共和国成立之初的辽宋金史研究在断代史研究中相对薄弱,本所的情况亦是如此,这从辽宋金史学科附属于明清史组(封建社会后期组)即可窥见一斑。建所初期从事宋史研究的是郦家驹、朱家源两位学者。

关键词：宋史研究明清史学术取向封建社会后期兴衰起伏窥见一斑初创期古代史

融合知识网络嵌入特征的潜在诉讼专利预警模型

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情报杂志 2024年第10期43卷 166-175页

作者：方曦彭康刘云上海应用技术大学经济与管理学院上海201418 中国科学院大学公共政策与管理学院北京100046

[研究目的]近年来专利诉讼案件频发,专利诉讼风险管理已成为企业技术研发、布局市场需要面对的一大挑战。建立潜在诉讼专利预警模型,能有效帮助创新主体尽早识别出引发诉讼的风险专利,采取应对措施以减少专利诉讼带来的经济损失。[研究... 详细信息

[研究目的]近年来专利诉讼案件频发,专利诉讼风险管理已成为企业技术研发、布局市场需要面对的一大挑战。建立潜在诉讼专利预警模型,能有效帮助创新主体尽早识别出引发诉讼的风险专利,采取应对措施以减少专利诉讼带来的经济损失。[研究方法]提取专利摘要的SAO结构建立技术领域内的知识网络,将目标专利摘要的SAO结构嵌入到先前专利构成的知识网络中计算出相关特征,与专利授权特征融合作为预测诉讼专利的特征集,利用Autogluon机器学习框架完成对潜在诉讼专利的预测。[研究结论]围绕数字信息传输技术开展实证研究,结果表明模型在融合知识网络特征后的预测性能更佳,精准率达到了76.7%,且特征向量中心性中值、PageRank中值在预测潜在诉讼专利中发挥了重要作用,丰富了当前诉讼专利预测研究的方法体系。

关键词：动态知识网络专利诉讼专利预警 SAO结构 Autogluon 机器学习数字信息传输