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High Fe‑Loading Single‑Atom Catalyst Boosts ROS Production by Density Effect for Efficient Antibacterial Therapy

Nano-Micro Letters 2025年第2期17卷 187-203页

作者： Si Chen Fang Huang Lijie Mao Zhimin Zhang Han Lin Qixin Yan xiangyu Lu Jianlin Shi Department of Cardiology Shanghai Tenth People’s HospitalSchool of MedicineTongji UniversityShanghai 200092People’s Republic of China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 200050People’s Republic of China Shanghai Frontiers Science Center of Nanocatalytic Medicine School of MedicineTongji UniversityShanghai 200092People’s Republic of China

The current single-atom catalysts(SACs)for medicine still suffer from the limited active site ***,we develop a synthetic method capable of increasing both the metal loading and mass-specific activity of SACs by exchanging zinc with *** constructed iron SACs(h^(3)-FNC)with a high metal loading of 6.27 wt%and an optimized adjacent Fe distance of~4 A exhibit excellent oxidase-like catalytic performance without significant activity decay after being stored for six months and promising antibacterial ***,a“density effect”has been found at a high-enough metal doping amount,at which individual active sites become close enough to interact with each other and alter the electronic structure,resulting in significantly boosted intrinsic activity of single-atomic iron sites in h^(3)-FNCs by 2.3 times compared to low-and medium-loading ***,the overall catalytic activity of h^(3)-FNC is highly improved,with mass activity and metal mass-specific activity that are,respectively,66 and 315 times higher than those of commercial Pt/*** addition,h^(3)-FNCs demonstrate efficiently enhanced capability in catalyzing oxygen reduction into superoxide anion(O_(2)·^(−))and glutathione(GSH)*** in vitro and in vivo assays demonstrate the superior antibacterial efficacy of h^(3)-FNCs in promoting wound *** work presents an intriguing activity-enhancement effect in catalysts and exhibits impressive therapeutic efficacy in combating bacterial infections.

关键词： Nanocatalytic medicine Single-atom catalysts Reactive oxygen species(ROS) High metal loading Oxidase catalysis

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Targeting capabilities of engineered extracellular vesicles for the treatment of neurological diseases

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Neural Regeneration Research 2025年第11期20卷 3076-3094页

作者： Xinyu Yang xiangyu Gao Xiaofan Jiang Kangyi Yue Peng Luo Department of Neurosurgery Xijing HospitalFourth Military Medical UniversityXi’anShaanxi ProvinceChina

Recent advances in research on extracellular vesicles have significantly enhanced their potential as therapeutic agents for neurological *** to their therapeutic properties and ability to cross the blood–brain barrier,extracellular vesicles are recognized as promising drug delivery vehicles for various neurological conditions,including ischemic stroke,traumatic brain injury,neurodegenerative diseases,glioma,and ***,the clinical application of natural extracellular vesicles is hindered by their limited targeting ability and short clearance from the *** address these limitations,multiple engineering strategies have been developed to enhance the targeting capabilities of extracellular vesicles,thereby enabling the delivery of therapeutic contents to specific tissues or ***,this review aims to highlight the latest advancements in natural and targeting-engineered extracellular vesicles,exploring their applications in treating traumatic brain injury,ischemic stroke,Parkinson's disease,Alzheimer's disease,amyotrophic lateral sclerosis,glioma,and ***,we summarized recent clinical trials involving extracellular vesicles and discussed the challenges and future prospects of using targeting-engineered extracellular vesicles for drug delivery in treating neurological *** review offers new insights for developing highly targeted therapies in this field.

关键词： Alzheimer's disease amyotrophic lateral sclerosis engineered extracellular vesicles glioma ischemic stroke neurological diseases Parkinson's disease psychosis targeted drug delivery traumatic brain injury

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Deliberate design of MOF-based pre-catalyst rationalizing the structural reconstruction toward efficient oxygen evolution reaction

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Science China Chemistry 2025年

作者： Yunhui Chen Meng Tian Zhongqi Zhang Guangzhao Wang Yan Guo Jing Wu Dawei Qi Zhenhua Yan xiangyu Liu Xi Liu State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering College of Chemistry and Chemical EngineeringNingxia University Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing School of Electronic Information Engineering Yangtze Normal University Frontiers Science Center for New Organic Matter Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) State Key Laboratory of Advanced Chemical Power Sources College of Chemistry Nankai University School of Chemistry and Chemical Engineering In-situ Center for Physical Sciences Frontiers Science Center for Transformative Molecules Shanghai Jiao Tong University

Metal-organic frameworks （MOFs）,that have emerged as promising electrocatalysts in oxygen evolution reaction （OER）,usually undergo structural reconstruction to form metal hydroxides as active ***,it remains a great challenge to design and synthesize ideal MOF-based pre-catalysts for properly cognizing and utilizing the reconstruction process toward efficient OER ***,the well-defined MOF-808 is post-modified by 2-hydroxyphosphonoacetic acid （HPAA） to form a micro-adsorber that enables to capture of metal ions ***3+and Ni2+ions are synergistically anchored into the microadsorber,developing a Fe/Ni-containing pre-catalyst that can be dynamically electrooxidized to be an active and stable dual-site electrocatalyst denoted by R-MOF-HPAA@FeNi with abundant metal *** a result,R-MOF-HPAA@FeNi exhibits an excellent OER performance with a low overpotential of 272 mV and Tafel slope of 35.9 m V dec-1,as well as long-term stability over 300 h at 10 m A *** and theoretical calculations suggest the resulting catalyst mainly follows a lattice oxygen mechanism （LOM） of dual-metal-site mechanism （DMSM）.Owing to the chelating role of HPAA,the post-synthesized MOF-HPAA behaves as a trap to uniformly and firmly adhere Fe3+and Ni2+ions,leading to a functionalized MOF-based pre-catalyst which can be structurally evolved into atomic level-distributed OER electrocatalysts.

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Analytical prediction of the maximum temperature of non-uniform heated surface with channel cooling

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Science China Technological Sciences 2025年第1期 177-188页

作者： xiangyu WANG Xianghua XU Xingang LIANG School of Aerospace Engineering Tsinghua University

Active cooling of aircraft skin has garnered significant attention from researchers in recent years due to the increasing flight speeds. The determination of the maximum temperature plays a crucial role in the design of active cooling systems as it dictates the selection of suitable materials for aircraft skin. This research presents two analytical models for predicting surface temperatures in aircraft skin with active cooling channels: one for densely arranged channels and another for sparsely arranged channels. The application criteria of these two models are obtained. The analytical models offer several advantages, including handling non-uniform heat fluxes and providing direct predictions of maximum temperature and its location. Numerical simulations validate these models, demonstrating their accurate estimation capabilities across various solid materials, Reynolds numbers, and thermal conductivities. This investigation lays the foundation for rapid and cost-effective design of optimal cooling channels based on solid thermal conductivity, cooling flow rate, channel spacing, and temperature limits under non-uniform heat flows. Furthermore, an examination of channel aspect ratios reveals that larger ratios result in lower heated surface temperatures. Overall, these analytical temperature prediction models serve as efficient tools for selecting appropriate design parameters for active cooling channels.

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大豆叶面肥实时变量喷施控制系统设计与试验

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农机化研究 2025年第3期47卷 176-180,196页

作者：辛项玉王熙黑龙江八一农垦大学工程学院黑龙江大庆163319

针对当前大豆叶面肥喷施控制精度低、喷施效果差、肥料利用率低等问题,设计了一种大豆叶面肥实时变量喷施控制系统,主要包括光谱传感器、专用控制器、控制系统和多种反馈信号传感器。专用控制器以微控制单元为核心,通过增量式PID算法根... 详细信息

针对当前大豆叶面肥喷施控制精度低、喷施效果差、肥料利用率低等问题,设计了一种大豆叶面肥实时变量喷施控制系统,主要包括光谱传感器、专用控制器、控制系统和多种反馈信号传感器。专用控制器以微控制单元为核心,通过增量式PID算法根据反馈信息处理工作调节变量喷施控制系统,搭建室内台架试验,验证调压比例阀在0.2~0.4 MPa范围内,流量增加了约2倍。通过室外试验采集数据做出喷雾机压力响应时间曲线,验证悬挂喷雾机搭配变量喷施控制系统可实现对压力实时调控,满足实时变量喷施控制系统的调节时间。研究结果可为大豆叶面肥变量喷施控制系统的研发提供理论基础。

关键词：大豆叶面肥变量喷施 PID控制调压比例阀

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“蘸”及相关语词考源

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长江学术 2025年第1期 122-128页

作者：刘翔宇武汉大学文学院湖北武汉430072

考求“蘸”字及相关语词来源有如下发现:第一,“蘸”来自精母盐韵平声的“渐”。第二,某些南方方言中当“浸”讲的词的本字是“渍”。第三,绩溪、丹阳、富阳等地当“蘸”讲的词的音韵地位是端母覃韵平声,并且与“需”有词源上的联系。

关键词：方言词源音韵地位本字

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Multi-algorithm Fusion Framework for Energy Prediction of Energy Harvesting IoT Node and Implementation

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Chinese Journal of Electronics 2020年第5期29卷 952-958页

作者： LI xiangyu XIE Nijie Institute of Microelectronics Tsinghua University Beijing National Research Center for Information Science and Technology

Accurate harvested energy prediction of the energy harvesting Internet-of-things(IoT) nodes is the basis of the proper power management and should be lowoverhead. A new multi-algorithm fusion framework, which merges results of multiple prediction algorithms to achieve a higher accuracy, has been proposed. A three-algorithm fusion solar radiation predictor was implemented. The experiments using the real solar radiation data show that it improves the percentage prediction error by 10%–26% for different prediction intervals. Its complexity is low enough to run on the embedded systems in real-time.

关键词： Energy harvesting Energy prediction Multi-algorithm fusion Internet-of-things

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Invariant holomorphic extension in several complex variables Dedicated to Professor Sheng GONG on the occasion of his 75th birthday

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Science China Mathematics 2006年第11期49卷 1593-1598页

作者： ZHOU xiangyu Institute of Mathematics AMSS Beijing Chinese Academy of Sciences

Two fundamental problems on the invariant holomorphic extensions have been posed, which are naturally arose from our solution of the extended future tube conjecture and closely and deeply related to the general theory of Stein manifolds due to Cartan-Serre. In this paper, the relationship is presented between the two problems, the motivation of considering the problems, and the methods to approach the problems. We have also posed some questions and conjectures related to this two problems.

关键词： Stein manifold, group action, plurisubharmonic function, minimum principle, categorical quotient.

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A NOVEL SEMI-ANALYTICAL METHOD FOR SOLVING ACOUSTIC RADIATION FROM LONGITUDINALLY STIFFENED INFINITE NON-CIRCULAR CYLINDRICAL SHELLS IN WATER

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Acta Mechanica Solida Sinica 2005年第1期18卷 1-12页

作者： xiangyu HuangYuying DepartmentofAutomotiveEngineering GuangxiUniversityofTechnologyLiuzhou545006China CollegeofCivilEngineeringandMechanics HuazhongUniversityofScienceandTechnologyWuhan430074China

Based on the extended homogeneous capacity high precision integration method and the spectrum method of virtual boundary with a complex radius vector, a novel semi-analytical method, which has satisfactory computation efectiveness and precision, is presented for solving the acoustic radiation from a submerged infnite non-circular cylindrical shell stifened by longitudinal ribs by means of the Fourier integral transformation and stationary phase method. In this work, besides the normal interacting force, which is commonly adopted by some researchers, the other interacting forces and moments between the longitudinal ribs and the non-circular cylindrical shell are considered at the same time. The efects of the number and the size of the cross-section of longitudinal ribs on the characteristics of acoustic radiation are investigated. Numerical results show that the method proposed is more efcient than the existing mixed FE-BE method.

关键词： sound-structure interaction stifened non-circular cylindrical shell vibration and acoustic radiation semi-analytical method transfer matrix method

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A kinetic study and factor analysis of solar thermochemical membrane reactors for syngas production

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Science China Technological Sciences 2025年第1期 207-221页

作者： Jiaxin XING Chao XU xiangyu SUN Xin XIA Fei JIN Qiongqiong JIANG Jiale GAO Key Laboratory of Power Station Energy Transfer Conversion and System of MOE School of Energy Power and Mechanical EngineeringNorth China Electric Power University Department of Chemistry University College London School of Chemistry and Chemical Engineering Ningxia Key Laboratory of Solar Chemical Conversion TechnologyState Ethnic Affairs CommissionNorth Minzu University

Solar thermochemical conversion technologies are promising for effectively utilizing solar energy by capturing the full spectrum of solar radiation. To overcome the challenges of low energy conversion efficiency and intermittency faced by solar thermochemical conversion, these technologies can be effectively integrated with membrane reactor technology. Although the performance of solar thermochemical membrane reactors has been experimentally tested, the chemical reactions and oxygen transport mechanisms during the energy conversion process remain poorly understood. This study introduces a resistance network model to elucidate the interactions between interfacial reactions and bulk diffusion during simultaneous oxidationreduction reactions on both sides of the membrane. We analyzed the oxygen flux of the membrane reactor under various operating conditions using this model to identify the reaction/transport-limiting side of the overall process. The most effective solar membrane reactor configuration utilizes natural gas and CO2, facilitating clean conversion of fossil fuels with significant advantages in fuel production and energy efficiency. Introducing CH4lowers the overall reaction temperature, maintains low oxygen partial pressure on the sweep side, and produces a synthesis gas with a 2:1 H2/CO molar ratio. Finally, a sensitivity analysis was used to explore the relationship between overall fuel production performance and operational parameters,highlighting the critical role of this research in enhancing the reaction and transport performance of membrane reactors and advancing the development of solar-driven thermochemical fuel production technologies.

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