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Underlying anti-hypertensive mechanism of the Mizuhopecten yessoensis derived peptide NCW in spontaneously hypertensive rats via widely targeted kidney metabolomics

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Food Science and Human Wellness 2024年第1期13卷 472-481页

作者： Wenjun Xue Wenzhu Zhao Sijia Wu zhipeng yu School of Food Science and Engineering Hainan UniversityHaikou 570228China College of Food Science and Engineering Bohai UniversityJinzhou 121013China Lab of Nutrition and Functional Food Jilin UniversityChangchun 130062China

The angiotensin-converting enzyme(ACE)inhibitory peptide NCW derived from Mizuhopecten yessoensis has been demonstrated to have significant in vivo anti-hypertensive effects,however,its anti-hypertensive mechanism is still not fully *** study established a UPLC-Q-TRAP-MS/MS-based widely targeted kidney metabolomics approach to explore the changes of kidney metabolic profiles and to clarify the antihypertensive mechanism of peptide NCW in spontaneously hypertensive rats(SHRs).Multivariate statistical analysis indicated that the kidney metabolic profiles were clearly separated between the SHR-NCW and SHRUntreated groups.A total of 85 metabolites were differentially regulated,and 16 metabolites were identified as potential kidney biomarkers,e.g.,3-hydroxybutyrate,malonic acid,deoxycytidine,and L-aspartic *** peptide NCW might regulate kidney metabolic disorder of SHRs to alleviate hypertension by suppressing inflammation and improving nitric oxide production under the regulation of linoleic acid metabolism,folate related pathways,synthesis and degradation of ketone bodies,pyrimidine metabolism,β-alanine metabolism,and retinal metabolism.

关键词： ACE inhibitory peptide Kidney Mechanism Metabolomics Spontaneously hypertensive rats

Long distance all-optical logic operations through a single multimode fiber empowered by wavefront shaping

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Photonics Research 2024年第3期12卷 587-597页

作者： zhipeng yu TIANTING ZHONG HUANHAO LI HAORAN LI CHI MAN WOO SHENGFU CHENG SHUMING JIAO HONGLIN LIU CHAO LU PUXIANG LAI Department of Biomedical Engineering The Hong Kong Polytechnic UniversityHong Kong SARChina Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518000China Peng Cheng Laboratory Shenzhen 518055China Key Laboratory for Quantum Optics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Department of Electronic and Information Engineering The Hong Kong Polytechnic UniversityHong Kong SARChina Photonics Research Institute The Hong Kong Polytechnic UniversityHong Kong SARChina

Multimode fibers(MMFs)are a promising solution for high-throughput signal transmission in the time ***,crosstalk among different optical modes within the MMF scrambles input information and creates seemingly random speckle patterns at the *** characterize this process,a transmission matrix(TM)can be used to relate input and output *** innovations use TMs to manipulate the output field by shaping the input wavefront for exciting advances in deep-brain imaging,neuron stimulation,quantum networks,and analog ***,these approaches consider input/output segments as independent,limiting their use for separate signal processing,such as logic *** proposed method,which makes input/output segments as interdependent,adjusts the phase of corresponding output fields using phase bias maps superimposed on input *** superposition enables signal logic operations through a 15-m-long *** experiments,a single optical logic gate containing three basic logic functions and cascading multiple logic gates to handle binary operands is *** operations are performed for multi-bit logic operations,and multiple optical logic gates are reconstructed simultaneously in a single logic gate with polarization *** proposed method may open new avenues for long-range logic signal processing and transmission via MMFs.

关键词： optical polarization fiber

Mixed iridium-nickel oxides supported on antimony-doped tin oxide as highly efficient and stable acidic oxygen evolution catalysts

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Materials Futures 2024年第1期3卷 165-180页

作者： Jonathan Ruiz Esquius Alec P LaGrow Haiyan Jin zhipeng yu Ana Araujo Rita Marques Adélio Mendes Lifeng Liu Clean Energy Cluster International Iberian Nanotechnology LaboratoryAv.Mestre JoséVeigaBraga 4715-330Portugal Carbon Science and Technology Institute INCAR-CSICFrancisco Pintado Fe 26Oviedo 33011Spain Scientific Imaging Section Okinawa Institute of Science and Technology Graduate UniversityKunigami-gunOkinawa 904-0412Japan Songshan Lake Materials Laboratory Dongguan 523808People’s Republic of China Laboratory for Process Engineering EnvironmentBiotechnology and EnergyFaculty of EngineeringUniversity of PortoRua Dr Roberto FriasPorto 4200-465Portugal Associate Laboratory in Chemical Engineering Faculty of EngineeringUniversity of PortoRua Dr Roberto FriasPorto 4200-465Portugal.

Proton exchange membrane(PEM)water electrolysis represents a promising technology for green hydrogen production,but its widespread deployment is greatly hindered by the indispensable usage of platinum group metal catalysts,especially iridium(Ir)based materials for the energy-demanding oxygen evolution reaction(OER).Herein,we report a new sequential precipitation approach to the synthesis of mixed Ir-nickel(Ni)oxy-hydroxide supported on antimony-doped tin oxide(ATO)nanoparticles(IrNiyO_(x)/ATO,20 wt.%(Ir+Ni),y=0,1,2,and 3),aiming to reduce the utilisation of scarce and precious Ir while maintaining its good acidic OER *** tested in strongly acidic electrolyte(0.1 M HClO_(4)),the optimised IrNi1Ox/ATO shows a mass activity of 1.0 mAµgIr^(−1) and a large turnover frequency of 123 s^(−1) at an overpotential of 350 mV,as well as a comparatively small Tafel slope of 50 mV dec^(−1),better than the IrOx/ATO control,particularly with a markedly reduced Ir loading of only 19.7µgIr cm^(−2).Importantly,IrNi1O_(x)/ATO also exhibits substantially better catalytic stability than other reference catalysts,able to continuously catalyse acidic OER at 10 mA cm^(−2) for 15 h without obvious *** in-situ synchrotron-based x-ray absorption spectroscopy confirmed that the Ir^(3+)/Ir^(4+)species are the active sites for the acidic ***,the performance of IrNi1Ox/ATO was also preliminarily evaluated in a membrane electrode assembly,which shows better activity and stability than other reference *** IrNi1Ox/ATO reported in this work is a promising alternative to commercial IrO_(2) based catalysts for PEM electrolysis.

关键词： mixed oxides oxygen evolution reaction polymer electrolyte membrane antimony doped tin oxide membrane electrode assembly

适用于MMC-MTDC的母线侧故障分析及保护策略

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高电压技术 2024年第5期50卷 2067-2077,I0019-I0022页

作者：鄢仁武俞智鹏方略斌福建理工大学电子电气与物理学院福州350118 智能电网仿真分析与综合控制福建省高校工程研究中心福州350118 国网福建省电力有限公司福州350013

柔性直流输电系统中,直流故障的分析与判别是柔直系统中亟待解决的重要问题。为了更好地分析故障特征,推导出一种多端柔性直流输电网(modular multilevel converter-high voltage direct current,MMC-MTDC)的母线侧简化电路故障计算方法... 详细信息

柔性直流输电系统中,直流故障的分析与判别是柔直系统中亟待解决的重要问题。为了更好地分析故障特征,推导出一种多端柔性直流输电网(modular multilevel converter-high voltage direct current,MMC-MTDC)的母线侧简化电路故障计算方法,并分析了母线侧单极接地故障和极间短路故障的故障特征,在此基础上设计了一种适用于多端柔性直流输电网的故障判别方案和保护措施。该判别方案通过故障启动判据、故障区域判别和故障类型判别3个模块进行故障判定,采用了故障电压瞬时跌落值与系统电压之差及故障线路电流值作故障特征量,整套判别方案不受其他元件参数、故障位置等因素的影响,将Spearman相关性分析与传统电气故障区域判别相结合,准确判定系统区内外故障的同时,解决了故障区域判别中受线路各参数干扰导致误判的问题,仿真测试验证了本保护方案的可行性。

关键词： MMC-HVDC 直流故障母线侧故障故障特征 Spearman相关性分析保护设计

潮湿环境下中压电缆接头早期故障的演变规律及特性

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高电压技术 2024年第3期50卷 1311-1321页

作者：于志鹏许永鹏钱庆林段常坤江秀臣上海交通大学电气工程系上海200240

由于目前缺乏对电缆接头早期故障演变过程的研究,为此根据实际运行场景设计了潮湿环境下的电缆接头早期故障模拟试验,得到不同放电次数下的电缆接头早期故障电流变化规律、绝缘损伤、气隙内积水位移等特征,分析早期故障演变过程,并根据... 详细信息

由于目前缺乏对电缆接头早期故障演变过程的研究,为此根据实际运行场景设计了潮湿环境下的电缆接头早期故障模拟试验,得到不同放电次数下的电缆接头早期故障电流变化规律、绝缘损伤、气隙内积水位移等特征,分析早期故障演变过程,并根据故障时的电极构成特征将早期故障分为第1、第2阶段,提出了早期故障2个阶段各自的特征。在此基础上建立了电弧位置固定时的早期故障仿真模型,仿真分析了电弧温度的变化、固体绝缘部分的高温区域形成以及电弧区域的热量散失等现象。综合试验与仿真结果认为,移动位置电弧与重燃电弧共同构成早期故障的第1阶段。当电弧位置临近接头接地点,早期故障将进入第2阶段。当闪络痕迹贯穿绝缘表面时,将形成永久性故障。该研究结果为早期故障特征识别与监测提供了理论支撑。

关键词：潮湿环境中压电缆接头早期故障实验模拟多物理场仿真故障演变过程

Easy preparation of multifunctional ternary PdNiP/C catalysts toward enhanced small organic molecule electro-oxidation and hydrogen evolution reactions

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Journal of Energy Chemistry 2021年第7期30卷 256-263页

作者： zhipeng yu Junyuan Xu Isilda Amorim yue Li Lifeng Liu International Iberian Nanotechnology Laboratory(INL) Av Mestre Jose Veiga4715-330 BragaPortugal Laboratory of Catalysis and Materials(LSRE-LCM) Faculdade de EngenhariaUniversidade do PortoRua Dr.Roberto Frias4200-465 PortoPortugal Department of Chemistry University of MinhoGualtar Campus4715-057 BragaPortugal

The small organic molecule electro-oxidation(OMEO) and the hydrogen evolution(HER) are two important half-reactions in direct liquid fuel cells(DLFCs) and water electrolyzers,respectively,whose performance is largely hindered by the low activity and poor stability of ***,we demonstrate that a simple phosphorization treatment of commercially available palladium-nickel(PdNi) catalysts results in multifunctional ternary palladium nickel phosphide(PdNiP) catalysts,which exhibit substantially enhanced electrocatalytic activity and stability for HER and OMEO of a number of molecules including formic acid,methanol,ethanol,and ethylene glycol,in acidic and/or alkaline *** improved performance results from the modification of electronic structure of palladium and nickel by the introduced phosphorus and the enhanced corrosion resistance of *** simple phosphorization approach reported here allows for mass production of highly-active OMEO and HER electrocatalysts,holding substantial promise for their large-scale application in direct liquid fuel cells and water electrolyzers.

关键词： PdNiP Multifunctional catalyst Phosphorization Small molecule electro-oxidation Hydrogen evolution

A highly efficient flower-like cobalt catalyst for electroreduction of carbon dioxide

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Chinese Journal of Catalysis 2018年第5期39卷 914-919页

作者： Gang Yang zhipeng yu Jie Zhang Zhenxing Liang Key Laboratory on Fuel Cell Technology of Guangdong Province School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510641GuangdongChina

Electrochemical conversion of CO2 into fuel has been regarded as a promising approach to achieve the global carbon ***,we report an efficient cobalt catalyst with a unique flower-like morphology synthesized by a green and facile hydrothermal method,in which n-butylamine is used as the capping *** resultant catalyst shows superior electrocatalytic activity toward CO2 electroreduction,which is highly selective for generating formate with a Faraday efficiency of 63.4%.Electrochemical analysis reveals that the oxide on the surface is essential for the electrocatalysis of the CO2 reduction *** voltammograms further suggest that this catalyst is highly active for the oxidation of reduced product,and can thus be seen as a bifunctional catalyst.

关键词： CO2 electroreduction reaction Cobalt Flower-like morphology Formate Interface

可再生能源电制氢合成氨系统的并/离网运行方式与经济性分析

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中国电机工程学报 2024年第1期44卷 117-126,I0010页

作者：林今余志鹏张信真李佳蓉清华大学北京市海淀区100084 清华四川能源互联网研究院四川省成都市610042

可再生能源电制氢合成氨(renewablepowerto ammonia,Re Pt A)是风力发电、光伏发电等可再生能源的大规模消纳方式之一,也是化工行业实现低碳清洁发展的重要技术路线之一。利用风电光伏电解水制氢合成氨系统模型,分析电网调峰型系统、电... 详细信息

可再生能源电制氢合成氨(renewablepowerto ammonia,Re Pt A)是风力发电、光伏发电等可再生能源的大规模消纳方式之一,也是化工行业实现低碳清洁发展的重要技术路线之一。利用风电光伏电解水制氢合成氨系统模型,分析电网调峰型系统、电网友好型系统、工艺离网型系统的绿氨成本,并对电化学储能设备规模、储氢设备规模、电解水制氢设备规模、电解水制氢设备效率等影响因素进行敏感性分析。基于3种绿氨系统的设备配置方案和运行方式评估不同类型系统所需的电网调峰电量,提出3种系统所适合的应用场景。研究结论是近期应该发展电网友好型RePtA系统,远期应该发展工艺离网RePtA系统。

关键词：可再生能源电解水制氢合成氨电网调峰型系统电网友好型系统工艺离网系统

Composition and Accumulation of Fouling during Leachate Reverse Osmosis Membrane Treatment in both a Typical Incineration Plant and a Landfill

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Wuhan University Journal of Natural Sciences 2022年第1期27卷 77-84页

作者： yu Lu LI Kunyu yu zhipeng ZENG Xiaolan College of Environment and Ecology Chongqing UniversityChongqing 400045China Zhuhai Institute of Urban Planning&Design Zhuhai 519002GuangdongChina

Reverse osmosis(RO)membrane process has been extensively used for leachate treatment both in incineration plants and ***,operation and maintenance costs caused by membrane pollution limit the wide application of RO *** order to further understand membrane fouling,this study analyzes the influent,effluent,concentrated liquid pollutants and membrane fouling of typical waste incineration plants and landfills in Chongqing,a city in the west of China based on the comparison of three-dimensional excitation and emission matrix fluorescence(3DEEM)and nanometer particle *** addition,this paper discusses the change law of chemical oxygen demand(COD)and main pollutants in membrane fouling in the disc tube reverse osmosis(DTRO)system in a single operation cycle,analyzes the main components of membrane fouling,and draws the accumulation of RO membrane pollutants,in order to provide a reference for understanding the composition,formation and control of membrane fouling.

关键词： reverse osmosis(RO)process leachate treatment properties of membrane fouling fouling formation incineration plant landfill