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Characteristics and phytotoxicity of hydrochar-derived dissolved organic matter:Effects of feedstock type and hydrothermal temperature

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journal of Environmental Sciences 2025年第3期149卷 139-148页

作者： Qianqian Lang Xuan Guo Chao wang lingyao li Yufei li junxiang Xu Xiang Zhao jijin li Bensheng liu Qinping Sun Guoyuan Zou Institute of Plant Nutrition and Resources Beijing Academy of Agriculture and Forestry SciencesBeijing 100097China

The dissolved organic matter(DOM)with high mobility and reactivity plays a crucial role in *** this study,the characteristics and phytotoxicity ofDOMreleased fromthe hydrochars prepared from different feedstocks(cowmanure,corn stalk and Myriophyllum aquaticum)under three hydrothermal carbonization(HTC)temperatures(180,200 and 220°C)were *** results showed that the hydrochars had high dissolved organic carbon content(20.15 to 37.65 mg/g)and its content showed a gradual reduction as HTC temperature *** fluorescent components including mixed substance of fulvic acid-like and humic acid-like substances(C1,30.92%-58.32%),UVA humic acid-like substance(C2,25.27%-29.94%)and protein-like substance(C3,11.74%-41.92%)were identified in hydrochar DOM by excitation emission matrix spectra coupled with parallel factor *** HTC temperature increased the relative proportion of aromatic substances(C1+C2)and humification degree of hydrochar DOM from cow manure,while it presented adverse effects on the hydrochar DOM from corn stalk and *** principal component analysis suggested that feedstock type and HTC temperature posed significant effects on the characteristics of hydrochar ***,seed germination test of all hydrochar DOM demonstrated that the root length was reduced by 8.88%-26.43%in contrast with control,and the germination index values were 73.57%-91.12%.These findings provided new insights into the potential environmental effects for hydrochar application in soil.

关键词： Hydrochar Hydrothermal temperature Dissolved organic matter Excitation emission matrix Parallel factor analysis Phytotoxicity

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Darboux transformation,positon solution,and breather solution of the third-order flow Gerdjikov–Ivanov equation

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Chinese Physics B 2025年第1期34卷 195-202页

作者： Shuzhi liu Ning-Yi li Xiaona Dong Maohua li School of Statistics and Data Science Ningbo University of TechnologyNingbo 315211China School of Mathematics and Statistics Ningbo UniversityNingbo 315211China College of wealth and Management Ningbo University of Finance and EconomicsNingbo 315175China

The third-order flow Gerdjikov–Ivanov(TOFGI)equation is studied,and the Darboux transformation(DT)is used to obtain the determinant expression of the solution of this *** this basis,the soliton solution,rational solution,positon solution,and breather solution of the TOFGI equation are obtained by taking zero seed solution and non-zero seed *** exact solutions and dynamic properties of the Gerdjikov–Ivanov(GI)equation and the TOFGI equation are compared in detail under the same conditions,and it is found that there are some differences in the velocities and trajectories of the solutions of the two equations.

关键词： third-order flow Gerdjikov-Ivanov equation solitons positons breathers

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Experimental and Numerical Study of Bonding Capacity of Interface between Ultra-High Performance Concrete and Steel Tube

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Structural Durability & Health Monitoring 2025年第2期19卷 285-305页

作者： Ruikun Xu jiu li wenjie li wei Zhang China Communications Third Highway Engineering Bureau Co. Ltd.Fuzhou350300China College of Civil Engineering Fujian University of TechnologyFuzhou350118China

This study investigates the bond performance at the interfacial region shared by Ultra-High Performance Concrete(UHPC)and steel tubes through push-out *** study examines how changes in steel fiber volumetric ratio and thickness of steel tube influence the bond strength *** results show that as the enhancement of the steel tube wall thickness,the ultimate bond strength at the interface improves significantly,whereas the initial bond strength exhibits only slight *** influence of steel fiber volumetric ratio presents a nonlinear trend,with initial bond strength decreasing at low fiber content and increasing significantly as fiber content ***,finite element(FE)simulations were applied to replicate the experimental conditions,and the outcomes showed strong correlation with the experimental data,confirming the exactitude of the FE model in predicting the bond behavior at the UHPC-Steel *** findings provide valuable insights for optimizing the design of UHPC-Filled steel tubes in high-performance structure.

关键词： Ultra-high performance concrete filled steel tube(UHPCFST) push-out test bonding capacity cohesive zone model

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Omnidirectional simulation analysis of thermomechanical coupling mechanism in inertia friction welding of Ni-based superalloy

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Chinese journal of Aeronautics 2025年第1期38卷 202-216页

作者： Chang-an li Guoliang QIN Hao wANG School of Materials Science and Engineering Shandong UniversityJinan 250061China

The coupling between heat and pressure is the kernel of inertia friction welding(IFw)and is still not fully understood.A novel 3D fully coupled finite element model based on a plastic friction pair was developed to simulate the IFw process of a Ni-based superalloy and reveal the omnidirectional thermo-mechanical coupling mechanism of the friction *** numerical model successfully simulated the deceleration,deformation processes,and peak torsional moments in IFw and captured the evolution of temperature,contact pressure,and *** simulated results were validated through measured thermal history,optical macrography,and axial *** results indicated that interfacial friction heat was the primary heat source,and plastic deformation energy only accounted for 4%of the *** increase in initial rotational speed and friction pressure elevated the peak temperature,reaching a maximum of 1525.5K at an initial rotational speed of 2000 r/min and friction pressure of 400 *** interface heat generation could form an axial temperature gradient exceeding 320K/*** radial inhomogeneities of heat generation and temperature were manifested in a concentric ring distribution with maximum heat flux and temperature ranging from 2/5 to 2/3 *** radial inhomogeneities were caused by increasing linear velocity along the radius and an opposite distribution of contact pressure,which could reach 1.7 times the set pressure at the *** circumferential inhomogeneity of thermomechanical distribution during rotary friction welding was revealed for the first time,benefiting from the 3D *** deflection and transformation of distribution in contact pressure and Mises stress were indicators of plastic deformation and transition of quasi-steady state *** critical Mises stress was 0.5 times the friction pressure in this *** presented modeling provides a reliable insight into the thermo-mechanical coupling mechanism of IFw and lays a solid found

关键词： Inertia friction welding Thermo-mechanical coupling Inhomogeneity Numerical simulation Ni-based superalloy

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Study on cook-off characteristics and thermal safety venting area of RBOE charge

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Defence Technology(防务技术) 2025年第1期43卷 271-287页

作者： Kebin Zhang wenbin li Changfang Zhao Zhifang wei Shuxia Zhang jin li School of Mechanical and Electrical Engineering North University of ChinaTaiyuan 030000China ZNDY of Ministerial Key Laboratory Nanjing University of Science and TechnologyNanjing 210094China Department of Engineering Mechanics CNMM and AMLTsinghua UniversityBeijing 100084China

RBOE is a new type of DNAN-based high-energy melt-cast mixed explosive,whose safety under thermal stimulation is significantly affected by heating conditions and venting area of the *** on the thermal decomposition reaction characteristics and combustion characteristics of each component of RBOE explosive,the cook-off calculation models of RBOE warhead before and after ignition were *** addition,closed and vented warheads were designed,as well as fast and slow cook-off test *** cook-off characteristics and thermal safety venting area of RBOE warhead were extensively *** results showed that the closed RBOE warhead underwent deflagration reaction under both slow and fast cook-off *** calculation result of the shell wall temperature before slow cookoff ignition response of the warhead was 454.06 K,with an error of+1.75%compared to the test result of462.15 K,and the temperature rise rate calculated was in good agreement with the *** calculated ignition time of RBOE warhead under fast cook-off was 161 s,with an error of+8.8%compared to the test result of 148 s,which verified the accuracy of cook-off model of RBOE warhead before *** to the cook-off calculation model of the warhead after ignition and cook-off test of the vented warhead,it was determined that the thermal safety venting area was 1124.61 mm^(2)for fast cook-off and 530.66 mm~2 for slow cook-off,effectively preventing the reaction of warhead above ***,this study provides a scientific basis for the thermal safety design and evaluation of insensitive warheads.

关键词： RBOE explosive Cook-off model Temperature distribution Pressure growth Venting area

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Glutamatergic CYLD deletion leads to aberrant excitatory activity in the basolateral amygdala:association with enhanced cued fear expression

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Neural Regeneration Research 2025年第11期20卷 3259-3272页

作者： Huidong li Faqin li Zhaoyi Chen Erwen wu Xiaoxi Dai Danni li Haojie An Shiyi Zeng Chunyan wang li Yang Cheng Long School of life Sciences South China Normal UniversityGuangzhouGuangdong ProvinceChina School of life Sciences Guangzhou UniversityGuangzhouGuangdong ProvinceChina Guangdong Provincial Key Laboratory of Major Obstetric Diseases The Third Affiliated Hospital of Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina South China Normal University-Panyu Central Hospital joint Laboratory of Translational Medical Research Panyu Central HospitalGuangzhouGuangdong ProvinceChina

Neuronal activity,synaptic transmission,and molecular changes in the basolateral amygdala play critical roles in fear ***(CYLD)is a deubiquitinase that negatively regulates the nuclear factor kappa-B *** is well studied in non-neuronal cells,yet underinvestigated in the brain,where it is highly *** studies have shown involvement of CYLD in the remodeling of glutamatergic synapses,neuroinflammation,fear memory,and anxiety-and autism-like ***,the precise role of CYLD in glutamatergic neurons is largely ***,we first proposed involvement of CYLD in cued fear *** next constructed transgenic model mice with specific deletion of Cyld from glutamatergic *** results show that glutamatergic CYLD deficiency exaggerated the expression of cued fear in only male ***,loss of CYLD in glutamatergic neurons resulted in enhanced neuronal activation,impaired excitatory synaptic transmission,and altered levels of glutamate receptors accompanied by over-activation of microglia in the basolateral amygdala of male ***,our study suggests a critical role of glutamatergic CYLD in maintaining normal neuronal,synaptic,and microglial *** may contribute,at least in part,to cued fear expression.

关键词： basolateral amygdala cued fear expression cylindromatosis deubiquitinase glutamate receptor 1 glutamatergic neuron microglial activation N-methyl-D-aspartate receptor 1 neuronal activation synaptic transmission

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Impact of aerosol-radiation interaction and heterogeneous chemistry on the winter decreasing PM_(2.5)and increasing O_(3)in Eastern China 2014–2020

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journal of Environmental Sciences 2025年第5期151卷 469-483页

作者： Yasong li Tijian wang Qin’geng wang Mengmeng li Yawei Qu Hao wu Min Xie School of the Environment Nanjing UniversityNanjing 210023China School of Atmospheric Sciences Nanjing UniversityNanjing 210023China College of Intelligent Science and Control Engineering Jinling Institute of TechnologyNanjing 211169China Key Laboratory of Transportation Meteorology of China Meteorological Administration Nanjing Joint Institute for Atmospheric SciencesNanjing 210041China School of Environment Nanjing Normal UniversityNanjing 210023China

In the context of the prevalent winter air quality issues in China marked by declining PM_(2.5)and rising O_(3),this study employed amodified wRF-Chem model to examine the aerosol radiation interaction(ARI),heterogeneous chemistry(AHC),and their combined impact(ALL)on the variations in O_(3)and PM_(2.5)during the 2014–2020 in eastern *** analysis confirmed that ARI curtailed O_(3)while elevating PM_(2.5).AHC reduced O_(3)through heterogeneous absorption of NOx and hydroxideswhile notably fostering fine-grained sulfate,resulting in a PM_(2.5)*** reductions mitigated the inhibitory impact of ARI on meteorological fields and photolysis *** reduction individually without aerosol feedback led to a 5.43 ppb O_(3)increase and a 22.89μg/m^(3)PM_(2.5)*** and AHC amplified the emission-reduction-induced(ERI)O_(3)rise by 1.83 and 0.31 ppb,*** response of ARI to emission diminution brought about a modest PM_(2.5)increase of 0.31μg/m^(3).Conversely,AHC,acting as the primary contributor,caused a noteworthy PM_(2.5)decrease of 4.60μg/m^(3).As efforts concentrate on reducing PM_(2.5),the promotion of ARI on PM_(2.5)counterbalanced the efficacy of emission reduction and the AHC-induced strengthening of PM_(2.5)*** ALL magnified the ERI O_(3)increase by 38.9%and PM_(2.5)decrease by 18.7%.Sensitivity experiments with different degrees of emission reduction demonstrated a consistent linear relationship between the ALL-induced enhancement of O_(3)increase and PM_(2.5)decrease to the ERI PM_(2.5)*** investigation revealed the complex connection between emissions and aerosol feedback in influencing air quality.

关键词： Aerosol-radiation interaction Heterogeneous chemistry O_(3)increase PM_(2.5)decrease Emission reduction

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Visible light excitation on CuPd/TiN with enhanced chemisorption for catalyzing Heck reaction

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Chinese Chemical Letters 2025年第1期36卷 362-368页

作者： Xuhui Fan Fan wang Mengjiao li Faiza Meharban Yaying li Yuanyuan Cui Xiaopeng li jingsan Xu Qi Xiao wei Luo State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China Beijing Key Laboratory of Ionic liquids Clean Process Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China National Energy R&D Center for Coal to liquid Fuels Synfuels China Technology Co.Ltd.Beijing 101407China Shimadzu(China)Co. Ltd.Shanghai 200233China School of Chemistry and Physics&Centre for Materials Science Queensland University of TechnologyBrisbaneQLD 4001Australia

In this work,we developed plasmonic photocatalyst composed of Cu Pd alloy nanoparticles supported on Ti N,the optimized Cu_(3)Pd_(2)/Ti N catalyst shows excellent conversion(>96%)and selectivity(>99%)for Heck reaction at 50℃ under visible light *** in-situ spectroscopic investigations,we find that visible light excitation could achieve stable metallic Cu species on the surface of Cu Pd alloy nanoparticles,thereby eliminating the inevitable surface oxides of Cu based *** in-situ formed metallic Cu species under irradiation take advantage of the strong interactions of Cu with visible light,and manifest in the localized surface plasmon resonances(LSPR)*** light excitation could further promote the charge transfer between catalytic Pd component and the support Ti N,resulting in electron-rich Pd sites on Cu Pd/Ti ***,light excitation on Cu Pd/Ti N generates strong chemisorption of iodobenzene and styrene,favoring the activation of reactants for Heck *** calculations suggest that electron-rich Cu Pd sites ideally lower the activation energy barrier for the coupling *** work provides valuable insights for mechanistic understanding of plasmonic photocatalysis.

关键词： Photocatalysis CuPd alloy Chemisorption Photocatalytic mechanism LSPR

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The role of sulfur cycle in new particle formation:Cycloaddition reaction of SO_(3)to H_(2)S

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journal of Environmental Sciences 2025年第2期148卷 489-501页

作者： Haijie Zhang wei wang liang Fan junling li Yanqin Ren Hong li Rui Gao Yisheng Xu State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China Key Laboratory of Cluster Science Ministry of Education of ChinaSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China

The chemistry of sulfur cycle contributes significantly to the atmospheric nucleation process,which is the first step of new particle formation(NPF).In the present study,cycloaddition reaction mechanism of sulfur trioxide(SO_(3))to hydrogen sulfide(H_(2)S)which is a typical air pollutant and toxic gas detrimental to the environment were comprehensively investigate through theoretical calculations and Atmospheric Cluster Dynamic Code ***-phase stability and nucleation potential of the product thiosulfuric acid(H_(2)S_(2)O_(3),TSA)were further analyzed to evaluate its atmospheric *** any catalysts,the H_(2)S+SO_(3)reaction is infeasible with a barrier of 24.2 kcal/*** nucleation precursors formic acid(FA),sulfuric acid(SA),and water(H_(2)O)could effectively lower the reaction barriers as catalysts,even to a barrierless reaction with the efficiency of cis-SA>trans-FA>trans-SA>H_(2)***,the gas-phase stability of TSA was investigated.A hydrolysis reaction barrier of up to 61.4 kcal/mol alone with an endothermic isomerization reaction barrier of 5.1 kcal/mol under the catalytic effect of SA demonstrates the sufficient stability of ***,topological and kinetic analysis were conducted to determine the nucleation potential of *** clusters formed by TSA and atmospheric nucleation precursors(SA,ammonia NH_(3),and dimethylamine DMA)were thermodynamically ***,the gradually decreasing evaporation coefficients for TSA-base clusters,particularly for TSA-DMA,suggests that TSA may participate in NPF where the concentration of base molecules are relatively *** present new reaction mechanismmay contributes to a better understanding of atmospheric sulfur cycle and NPF.

关键词： New particle formation(NPF) Atmospheric sulfur cycle Nucleation process Reaction mechanism Hydrogen sulfide(H_(2)S) Atmospheric Cluster Dynamic Code (ACDC)

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Facile construction of heterogeneous dual-ionic poly(ionic liquid)s for efficient and mild conversion of CO_(2)into cyclic carbonates

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journal of Environmental Sciences 2025年第3期149卷 177-187页

作者： Guanqun Xie jiaxiang Qiu Huadeng li Hongbin Luo Shuo li Yanbin Zeng Ke Zheng Xiaoxia wang School of Environment and Civil Engineering Dongguan University of TechnologyDongguan 523808China School of Materials Science and Engineering Guangdong Provincial Engineering Technology Research Center of Key Material for High Performance Copper Clad LaminateDongguan University of TechnologyDongguan 523808China

In the context of peaking carbon dioxide emissions and carbon neutrality,development of feasible methods for converting CO_(2)into high value-added chemicals stands out as a hot *** this study,P[D+COO^(−)][Br^(−)][DBUH^(+)],a series of novel heterogeneous dual-ionic poly(ionic liquid)s(PILs)were synthesized readily from 2-(dimethylamino)ethyl methacrylate(DMAEMA),bromo-substituted aliphatic acids,organic bases and divinylbenzene(DVB).The structures,compositions and morphologies were characterized or determined by nuclear magnetic resonance(NMR),thermal gravimetric analysis(TGA),infrared spectroscopy(IR),scanning electron microscopes(SEM),and Brunauer-Emmett-Teller analysis(BET),*** of the P[D+COO^(−)][Br^(−)][DBUH^(+)]series as catalysts in converting CO_(2)into cyclic carbonates showed that P[D+COO^(−)][Br^(−)][DBUH^(+)]-2/1/0.6was able to catalyze epiclorohydrin-CO_(2)cycloaddition the most *** afforded chloropropylene carbonate(CPC)in 98.4%yield with≥99%selectivity in 24 hr under solvent-and additive-free conditions at atmospheric *** experiments showed that recycling of the catalyst 6 times only resulted in a slight decline in the catalytic *** addition,it could be used for the synthesis of a variety of differently substituted cyclic carbonates in good to excellent ***,key catalytic active sites were probed,and a reasonable mechanism was proposed *** summary,this work poses an efficient strategy for heterogenization of dual-ionic PILs and provides amild and environmentally benign approach to the fixation and utilization of carbon dioxide.

关键词： Dual-ionic poly(ionic liquid)s CO_(2)cycloaddition Epoxides Cyclic carbonates Heterogeneous catalysts

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