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Significant spatiotemporal pattern of nitrous oxide emission and its influencing factors from a shallow eutropic lake in Inner Mongolia,China

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Journal of Environmental Sciences 2025年第3期149卷 488-499页

作者： Guohua Li Sheng Zhang Xiaohong Shi Shengnan Zhao Liyang Zhan Xueru pan Fan Zhang Haifeng Yu Yue Sun Lauri Arvola Jussi Huotari Water Conservancy and Civil Engineering College Inner Mongolia Agricultural UniversityHohhot 010018China Inner Mongolia Water Resource Protection and Utilization Key Laboratory Hohhot 010018China State Gauge and Research Station of Wetland Ecosystem Wuliangsuhai LakeBayan Nur 014404China Key Laboratory of Global Change and Marine-Atmospheric Chemistry Third Institute of OceanographyMinistry of Natural ResourcesXiamen 361005China Faculty of Biological and Environmental Sciences Ecosystems and Environment Research ProgrammeLammi Biological StationUniversity of HelsinkiLammi FI-16900Finland Masinotek Oy Ensimmainen Savu 2Vantaa FI-01510Finland

Eutrophic shallow lakes are generally considered as a contributor to the emission of nitrous oxide(N_(2)O),while regional and global estimates have remained *** due to a lack of data and insufficient understanding of the multiple contributing *** study characterized the spatiotemporal variability in N_(2)O concentrations and N_(2)O diffusive fluxes and the contributing factors in LakeWuliangsuhai,a typical shallow eutrophic and seasonally frozen lake in Inner Mongolia with cold and arid *** N_(2)O concentrations of the lake exhibited a range of 4.5 to 101.2 nmol/L,displaying significant spatiotemporal *** lowest and highest concentrations were measured in summer and winter,*** spatial distribution of N_(2)Ofluxwas consistent with that of N_(2)O ***,the hotspots of N_(2)O emissions were detected within close to the main inflow of *** wide spatial and temporal variation in N_(2)O emissions indicate the complexity and its relative importance of factors influencing emissions.N_(2)O emissions in different lake zones and seasons were regulated by diverse *** influencing the spatial and temporal distribution of N_(2)O concentrations and fluxes were identified as WT,WD,DO,Chl-a,SD and ***,the same factor demonstrated opposing effects on N_(2)O emission in various seasons or *** research improves our understanding of N_(2)O emissions in shallow eutrophic lakes in cold and arid areas.

关键词： Nitrous oxide Spatial and temporal variation Controlling factors Shallow lakes

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Efficient photocatalytic H2 evolution over tubular mesoporous carbon nitride with N-vacancy by microwave-assisted synthesis

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Science China Chemistry 2025年第3期 866-873页

作者： Yuanlong pan Qiang Zhang Guangzheng Huang Yannan Luo Honglin Gao School of Materials and Energy National Center for International Research on Photoelectric and Energy MaterialsYunnan University

Modifying the microstructure of photocatalysts while simultaneously introducing vacancies has shown significant potential in enhancing their performance for hydrogen ***,a novel tubular mesoporous carbon nitride（TMCN） with nitrogen vacancies was fabricated using a microwave-assisted synthesis strategy,employing melamine-cyanuric acid supramolecular（MC-S） as the *** optimized TMCN exhibited an outstanding H2production rate,approximately 29 times higher than that of pristine *** N-vacancies serve as sites for reactant adsorption and activation,leading to enhanced delocalization of ***,the porous structures of TMCN facilitate the reactant diffusion,while its tubular architectures promote the oriented transfer of charge ***,the markedly improved photocatalytic performance of TMCN can be predominantly attributed to the synergistic effects arising from its superior structure and N-vacancy *** work opens new possibilities for the simultaneous formation of surface defect states as photocatalytic reaction sites and distinctive structures conducive to charge carrier transport.

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Insights into the role of the different supports in copper-based catalysts for propane combustion

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Progress in Natural Science:Materials International 2025年第01期 187-193页

作者： Yarong Fang Shiqi Ma Zhixin Yu Chuanqi pan Shipeng Wan School of Environmental Science and Engineering Nanjing Tech University College of Environmental Engineering Henan University of Technology

The catalytic efficacy of copper-based catalysts for volatile organic compounds（VOCs） oxidation is significantly affected by the metal oxide support's chemical properties. However, rigorous comparative analyses on TiO2and CeO2supports are scarce. This study systematically constructs Cu/TiO2and Cu/CeO2catalysts and investigates their mechanisms in promoting propane oxidation. Cu/CeO2exhibits superior performance and stability. Our research reveals the key role of Cu-O-Ce interfacial architecture in forming Cu1+sites for efficient propane adsorption and triggering surface Olattgeneration, accelerating propane combustion. These findings elucidate Cu/CeO2catalyst enhanced performance and offer insights into non-noble metal catalysts. By demonstrating CeO2catalyst superiority, this study provides a basis for selecting optimal support materials to optimize catalyst performance, driving the development of cost-effective and eco-friendly catalytic technologies for air pollution control.

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Ferulic acid alleviates long-term avermectin-induced damage to the spleen of carp and restores its inflammatory response and oxidative balance

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Journal of Environmental Sciences 2025年第5期151卷 616-626页

作者： Hanyu Wang Shenye Feng Enzhuang pan Xiaomeng Ji Mengyuan Zhou Shuai Zhang Baoshi Xu Huimiao Feng Jilei Yin Zibo Dong Jiangsu Key Laboratory of Marine Bioresources and Environment Co-Innovation Center of Jiangsu Marine Bio-industry TechnologyJiangsu Marine Pharmaceutical Resources Development Engineering Research CenterJiangsu Key Laboratory of Marine Pharmaceutical Compound ScreeningCollege of PharmacyJiangsu Ocean UniversityLianyungang 222005China Department of Traditional Chinese Medicine Jiangsu Union Technical Institute Lianyungang Branch institute of Traditional Chinese MedicineLianyungang 222006China

Extensive use of avermectin(AVM)in agriculture can seriously contaminate fish in *** acid(FA)is a strong antioxidant sourced from plants and is widely applied in food and medicine,but its protective function on the immunological damage caused by AVM is still *** this study,carp were chronically exposed to(1/1096 hr LC_(50))AVM for 30 day(s),with a dietary supplement of FA(400 mg/kg)to assess its effects on carp *** experimental groups(n=10)included:control,AVM-exposed(2.404μg/L),FA+AVM co-treated,and FA ***-term AVM exposure altered spleen tissue,reducing serum complement C3(p<0.01)and immunoglobulin M levels(p<0.001),and increasing proinflammatory tnf-α(p<0.001),il-6(p<0.001),il-1β(p<0.001),and inos mRNA levels,whilst down-regulating the anti-inflammatory tgf-β(p<0.05).Additionally,it disrupted the balance of oxidative stress indicators such asMDA(p<0.001),T-AOC,GSH,and CAT,leading to spleen tissue apoptosis(42.4%).However,the addition of FA reversed these conditions,elevated the anti-inflammatory factor,and improved spleen immune function following chronic exposure to AVMin ***,the ability to restore oxidative homeostasis in carp by adjusting the Nrf2/NQO-1 axis protected the health of spleen *** discovery also supports the development of fish feed for aquaculture.

关键词： Avermectin Ferulic acid Oxidative stress Inflammation response

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Control upconversion decay dynamics from perspective of collective response

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Journal of Rare Earths 2025年第1期43卷 57-63,I0003页

作者： Yingdong Han Yutong pan Tong Wei Yu Ma Xingxing Zhang Lei Jiang Kai Chen Liwei Wu Jiao Cui Chao Gao College of Science Civil Aviation University of ChinaTianjin300300China School of Inspection and Testing Certification Changzhou Vocational Institute of EngineeringChangzhou213164China School of Chemical and Physical Sciences Victoria University of WellingtonWellington6012New Zealand Robinson Research Institute Faculty of EngineeringVictoria University of WellingtonWellington6012New Zealand

Very recently,upconversion luminescence(UCL)lifetime,as a powerful optical dimension,has attracted tremendous research interest due to its advantages of high information capacity and high photophysical *** the implementation and emergence of endlessly fascinating UCL features,it is particularly meaningful to understand the photophysical mechanisms inside UCL materials to enable rational subdivision-level structure design,which is however currently far from *** this work,we take an ordinary upconversion nanoparticle as an example to prove that the UCL decay curves and corresponding lifetimes are indeed a collective response of the entire UCL system to excitations,that exhibits correlated,yet quite different properties from individual ions.A specially developed theoretical random walk model combined with an experimental lifetime control for Yb^(3+)/Er^(3+)UCL demonstrates that ene rgy diffusion principally alters the decay ***,the different extent of the influence of energy diffusion on the emissions of ^(2)H_(11/2)/^(4)S_(3/2)(green)and ^(4)F_(9/2)(red)leads to an extremely uncommon crossover comparison of decay *** work provides new ideas for understanding decay dynamics and practical UCL lifetime manipulation methods.

关键词： Upconversion Lifetime Collective response Decaycurves Random walk model Rare earths

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Numerical Simulation of Gas-LiquId Flow in a Horizontal Elbow

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Fluid Dynamics & Materials Processing 2025年第1期21卷 107-119页

作者： Lihui Ma Wei Li Yuanyuan Wang pan Zhang Lina Wang Xinying Liu Meiqin Dong Xuewen Cao Jiang Bian Technical Inspection Center Sionpec Shengli Oilfield CompanyDongying257000China College of Pipeline and Civil Engineering China University of Petroleum(East China)Qingdao266580China School of Petroleum Engineering Yangtze UniversityWuhan430100China

Gas-liquid flow(GLF),especially slug and annular flows in oil and gas gathering and transportation pipelines,become particularly complex inside elbows and can easily exacerbate pipeline corrosion and *** thisstudy,FLUENT was used to conduct 3D simulations of slug and annular flow in elbows for different velocitiesto assess the ensuing changes in terms of *** particular,the multifluid VOF(Volume of Fraction)modelwas *** results indicate that under both slug and annular flow conditions,the pressure inside the elbow islower than the *** the superficial velocity of liquid and gas increase,the pressure and liquid flow velocityat different positions of the elbow also increase,while the secondary flow *** annular flow conditions,the liquid film on the outer side of the elbow is thicker than that on the inner side,and the liquid velocityin the main liquid film zone is the lowest.

关键词： Gas-liquid flow elbow CFD VOF model

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Preliminary perspectives on 3GPP standardization of the propagation channel model for FR3 bands for NR

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Science China(Information Sciences) 2025年第03期68卷 391-392页

作者： pan TANG Jianhua ZHANG Huixin XU Haiyang MIAO Ximan LIU State Key Laboratory of Network and Switching Technology Beijing University of Posts and Telecommunications

Introduction of the study item on the channel model for FR3 bands for NR. According to the 3rd generation partnership project(3GPP) schedule, 3GPP work for the sixth generation(6G) typically starts in 2024 during Release 19. This release aims to establish the technical foundations for 6G and include preliminary work on new 6G capabilities.

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Causal relationship between lipid profile and muscle atrophy:A bi-directional Mendelian randomization study

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Animal Models and Experimental Medicine 2025年第1期8卷 154-161页

作者： Kun Chen Peng Gao Xiaoxiang Fang Kexing Tang pan Ouyang Zongchao Li Liangjun Li Zhenhan Deng Department of Orthopaedics The Affiliated Changsha Central HospitalHengyang Medical SchoolUniversity of South ChinaChangshaHunanChina Department of Orthopaedic Surgery The First Affiliated Hospital of Wenzhou Medical UniversityWenzhouZhejiangChina

Background:The aim of this study was to analyze the bi-directional causal relation-ship between lipid profile and characteristics related to muscle atrophy by using a bi-directional Mendelian randomization(MR)***:The appendicular lean mass(ALM),whole body fat-free mass(WBFFM)and trunk fat-free mass(TFFM)were used as genome-wide association study(GWAS)data for evaluating muscle mass;the usual walking pace(UWP)and low grip strength(LGS)were used as GWAS data for evaluating muscle strength;and the triglycerides(TG),total cholesterol(TC),high density lipoprotein cholesterol(HDL),low density lipo-protein cholesterol(LDL),apolipoprotein A-1(Apo A-1),and apolipoprotein B(Apo B)were used as GWAS data for evaluating lipid *** specific investigations,we mainly employed inverse variance weighting for causal estimation and MR-Egger for pleiotropy ***:MR results showed that the lipid profile predicted by genetic variants was negatively correlated with muscle mass,positively correlated with UWP,and was not causally correlated with *** the other hand,the muscle mass predicted by genetic variants was negatively correlated with lipid profile,the UWP predicted by genetic variants was mainly positively correlated with lipid profile,while the LGS pre-dicted by genetic variants had no relevant causal relationship with lipid ***:Findings of this MR analysis suggest that hyperlipidemia may affect muscle mass and lead to muscle atrophy,but has no significant effect on muscle *** the other hand,increased muscle mass may reduce the incidence of dyslipidemia.

关键词： lipid profile Mendelian randomization muscle atrophy

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Environment-friendly Ca2+/Cr3+co-doping LaAlO3 ceramics with excellent infrared radiation performance for energy-saving

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JOURNAL OF ADVANCED CERAMICS 2025年第1期14卷 205-214页

作者： Yuan, Xinglai Wang, Qinghu Wu, Runke Sang, Shaobai Xu, Yibiao Liang, Xiong pan, Liping Fan, Bingbing Li, Yawei Zhang, Rui Li, Jiangtao Volkova, Olena Wuhan Univ Sci & Technol State Key Lab Refractories & Met Joint Int Res Lab Refractories & Met Wuhan 430081 Peoples R China Zhengzhou Univ Sch Mat Sci & Engn Zhengzhou 450001 Peoples R China Henan Acad Sci Inst Adv Ceram Zhengzhou 450046 Peoples R China Chinese Acad Sci Tech Inst Phys & Chem Beijing 100190 Peoples R China TU Bergakad Freiberg Inst Iron & Steel Technol D-09599 Freiberg Germany

Ca2+/Cr3+ co-doped LaAlO3 infrared (IR) ceramics have been proven to be potential energy-saving materials for high- temperature industries because of their high emissivity and high- temperature stability. However, Cr6+ formation commonly occurs in materials and poses environmental and health risks, such as Cr6+ dissolution in water and CrO3(g) volatilization. In this study, we combined high emissivity with in situ detoxification by introducing residual Al2O3 into Ca2+/Cr3+ co-doped LaAlO3 ceramics. Compared with the undoped ceramics, the addition of 20 wt% residual Al2O3 resulted in a 78.5% reduction to 18.44 mg/kg (lower than the EU standard of 20 mg/kg) in Cr6+ dissolution and a decrease in 77.8% CrO3(g) volatilization. This significant detoxification effect can be attributed to the formation of CaAl12-xCrxO19. Additionally, as the residual Al2O3 content increased from 5 to 20 wt%, the ceramics maintained high emissivity, above 0.896 in the near-infrared band and 0.781 in the mid-infrared band. Furthermore, the IR coating effectively increased the surface temperature (from 767.1 to 790.7 degrees C/min) and the heat radiation of the heating source, increasing the heating rate from 31.7 to 34.6 degrees C/min during water heating. This work offers a promising approach for designing environmentally friendly IR ceramics with excellent IR performance for energy-saving applications in the high-temperature industry.

关键词： infrared (IR) radiation energy-saving environmentally friendly Cr6+suppression LaAlO3

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Inter‑Skeleton Conductive Routes Tuning Multifunctional Conductive Foam for Electromagnetic Interference Shielding,Sensing and Thermal Management

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Nano-Micro Letters 2025年第3期17卷 19-36页

作者： Xufeng Li Chunyan Chen Zhenyang Li Peng Yi Haihan Zou Gao Deng Ming Fang Junzhe He Xin Sun Ronghai Yu Jianglan Shui Caofeng pan Xiaofang Liu School of Materials Science and Engineering Beihang UniversityBeijing 100191People’s Republic of China Institute of Atomic Manufacturing Beihang UniversityBeijing 100191People’s Republic of China Tianmushan Laboratory Xixi Octagon CityYuhang DistrictHangzhou 310023People’s Republic of China Science and Technology On Electromagnetic Scattering Laboratory Beijing Institute of Environmental FeaturesBeijing 100854People’s Republic of China

Conductive polymer foam(CPF)with excellent compressibility and variable resistance has promising applications in electromagnetic interference(EMI)shielding and other integrated functions for wearable ***,its insufficient change amplitude of resistance with compressive strain generally leads to a degradation of shielding performance during ***,an innovative loading strategy of conductive materials on polymer foam is proposed to significantly increase the contact probability and contact area of conductive components under *** inter-skeleton conductive films are constructed by loading alginate-decorated magnetic liquid metal on the polymethacrylate films hanged between the foam skeleton(denoted as AMLM-PM foam).Traditional point contact between conductive skeletons under compression is upgraded to planar contact between conductive ***,the resistance change of AMLM-PM reaches four orders of magnitude under ***,the inter-skeleton conductive films can improve the mechanical strength of foam,prevent the leakage of liquid metal and increase the scattering area of EM ***-PM foam has strain-adaptive EMI shielding performance and shows compression-enhanced shielding effectiveness,solving the problem of traditional CPFs upon *** upgrade of resistance response also enables foam to achieve sensitive pressure sensing over a wide pressure range and compression-regulated Joule heating function.

关键词： Inter-skeleton conductive films Conductive polymer foam Liquid metal Electromagnetic interference shielding

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