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neural Regeneration Research 2024年第2期19卷 302-308页

作者： Joaquín Martí-Clúa Unidad de Citología e Histología.Departament de Biologia Cel·lular de Fisiologia i d’Immunologia.Facultad de Biociencias.Institut de Neurociències.Universidad Autónoma de Barcelona08193 BellaterraBarcelonaSpain

The halopyrimidine 5-bromo-2′-deoxyuridine(BrdU)is an exogenous marker of DnA *** the introduction of monoclonal antibodies against BrdU,an increasing number of methodologies have been used for the immunodetection of this synthesized bromine-tagged base analogue into replicating *** labeling is widely used for identifying neuron precursors and following their fate during the embryonic,perinatal,and adult neurogenesis in a variety of vertebrate species including birds,reptiles,and *** to BrdU toxicity,its incorporation into replicating DnA presents adverse consequences on the generation,survival,and settled patterns of *** may lead to false results and misinterpretation in the identification of proliferative *** this review,I will indicate the detrimental effects of this nucleoside during the development of the central nervous system,as well as the reliability of BrdU labeling to detect proliferating ***,it will show factors influencing BrdU immunodetection and the contribution of this nucleoside to the study of prenatal,perinatal,and adult *** adult neurogenesis will also be *** is my hope that this review serves as a reference for those researchers who focused on detecting cells that are in the synthetic phase of the cell cycle.

关键词： 5-bromo-2′-deoxyuridine adult neurogenesis human adult neurogenesis labeling pitfalls prenatal neurogenesis proliferation S-phase suturing S-phase toxicity

n-cycle gene abundance determination of n mineralization rate following re-afforestation in the Loess Plateau of China

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Soil Ecology Letters 2024年第1期6卷 97-106页

作者： Yaping Zhao Yuqing Zhao Shuohong Zhang Yulin Xu Xinhui Han Gaihe Yang Chengjie ren College of Agronomy Northwest A&F UniversityYangling 712100China Shaanxi engineering Research Center of Circular Agriculture College of AgronomyNorthwest A&F UniversityYangling 712100China

Afforestation effectively improved soil microbial communities and significantly increased soil nitro-gen mineralization rate(Rm).Soil microorganisms drive Rm by regulating soil n-cycling *** nitrification genes had a major effect on soil Rm than denitrification genes after *** the function of forest ecosystems requires an understanding of the mechanism of soil nitrogen ***,it remains unclear how soil n-cycling genes drive soil nitrogen mineralization during *** this study,we collected soil samples from a chrono-sequence of 14,20,30,and 45 years of Robinia pseudoacacia L.(RP14,RP20,RP30,and RP45)with a sloped farmland(FL)as a *** metagenomic sequencing analysis,we found significant changes in the diversity and composition of soil microbial communities involved in n-cycling along the afforestation time series,with afforestation effectively increasing the diversity(both alpha and beta diversity)of soil microbial *** conducted indoor culture experiments and analyzed correlations,which revealed a significant increase in both soil nitrification rate(Rn)and soil nitrogen mineralization rate(Rm)with increasing stand ***,we found a strong correlation between soil Rm and soil microbial diversity(both alpha and beta diversity)and with the abundance of soil n-cycling *** least squares path modeling(PLS-PM)analysis showed that nitrification genes(narH,narY,nxrB,narG,narZ,nxrA,hao,pmoC-amoC)and denitrification genes(norB,nosZ,nirK)had a greater direct effect on soil Rm compared to their effect on soil microbial *** results reveal the relationships between soil nitrogen mineralization rate and soil microbial communities and between the mineralization rate and functional genes involved in n-cycling,in the context of Robinia pseudoacacia *** on the Loess *** study enriches the understanding of the effects of microorganisms on soil nitrogen mineraliza

关键词： afforestation soil n mineralization rate denitrification genes nitrification genes the Loess Plateau

Electrolyte dependence for the electrochemical decarboxylation of medium-chain fatty acids (n-octanoic acid) into fuel on Pt electrode

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Materials Reports(energy) 2024年第2期4卷 64-70页

作者： Zhenmin Zhang Dezhang ren Dian Zhang Tiantian Hu Congyuan Zeng nengneng Xu Zhibao Huo Jinli Qiao College of Marine Ecology and environment Shanghai Ocean UniversityShanghai201306PR China Department of Mechanical engineering Southern University and A&M CollegeBaton RougeLA70807USA State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Environmental Science and EngineeringDonghua UniversityShanghai201620PR China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092PR China

The deoxygenation of organic acids, important biomass feedstocks and derivatives, to synthesize hydrocarbon products under mild electrochemical conditions, holds significant importance for the production of carbon-neutral biofuels. There is still limited research on the influential factors of the electrochemical decarboxylation reaction of medium-chain fatty acids. In this study, n-octanoic acid (OA) was chosen as the research subject to investigate the electrochemical decarboxylation behavior of OA on a platinum electrode, focusing on the influence of different alkali metal cations (Li^(+), na^(+), K^(+)), common anions (SO^(4)^(2−), Cl^(−)), and electrolyte pH. It was found that KOH as an electrolyte exhibited the best performance for OA. Possibly, the larger size of K^(+) increased the alkalinity of the electrode surface, facilitating OA deprotonation. LiOH electrolyte reduced the solubility of OA, thereby inhibiting the decarboxylation reaction. SO^(4)^(2−) exhibited a weak promoting effect on the decarboxylation reaction of OA, while Cl^(−) showed no adverse effect although Cl^(−) may adsorb on the electrode surface. Furthermore, unlike short-chain fatty acids, medium-chain OA can only achieve efficient decarboxylation under alkaline conditions due to its solubility properties. This study provides references and foundations for future efforts to enhance the efficiency of electrochemical decarboxylation synthesis of hydrocarbon biofuels from medium-chain fatty acids.

关键词： Fatty acids Kolbe reaction Decarboxylation Hydrocarbon Electrolyte

Design of bionic water jet thruster with double-chamber driven by electromagnetic force

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International Journal of Mechanical System Dynamics 2024年第3期4卷 292-302页

作者： Chong Cao Yasong Zhang Chengchun Zhang Chun Shen Wen Cheng Zhenjiang Wei Zhengyang Wu Luquan ren Key Laboratory of Bionic engineering(Ministry of Education) Jilin UniversityChangchunChina Weihai Junming Power Technology Co.Ltd. WeihaiChina

In response to the limitations of the single-chamber water jet thruster used in underwater vehicles mimicked by natural cephalopods,a novel approach involving a double-chamber water jet thruster has been *** thruster utilizes electromagnetic force to manipulate the diaphragm,thereby altering the volume of the upper and lower chambers to achieve water jet *** investigations were conducted to determine the tensile length-force characteristics of the diaphragm made of ***,key parameters of essential propulsion components,such as solenoid coils,electromagnets,and currents,were established based on the tensile length-force curve,and the propulsion capabilities of the system were evaluated through theoretical *** assessments indicate that the system does not produce reverse thrust regardless of whether the coil moves up or *** experimental results demonstrate that the maximum peak propulsion force generated by the dual-chamber water jet thruster within a 3-s cycle is 0.253n.

关键词： water jet thruster diaphragm electromagnetic force

Recent advances in Fe-n-C-and Co-n-C-based materials as bifunctional electrocatalysts for oxygen reduction and oxygen evolution

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science China Chemistry 2024年第4期67卷 1137-1160页

作者： Hui-Min Xu Hong-Rui Zhu Chen-Jin Huang Zhi-Jie Zhang Ting-Yu Shuai Qi-ni Zhan Gao-ren Li College of Materials science and engineering Sichuan UniversityChengdu 610065China

Fe-nitrogen-carbon(Fe-n-C)-and Co-nitrogen-carbon(Co-n-C)-based electrocatalysts have been widely concerned because of their high OER/Orr activity,low metal cost,and simple *** exploration of Fe-n-C and Co-n-C single atombased catalysts with high activity and stability to overcome the slow kinetics of oxygen reduction and oxygen evolution reactions is also the key to the development of efficient electrolytic water,fuel cells,and rechargeable metal-air ***-n-C and Co-n-C single atom-based electrocatalysts have the advantages of a high utilization rate of metal atoms and high electrocatalytic activity,and are ideal catalysts for promoting electrochemical energy conversion and *** general principles of designing Fe-n-C and Co-n-C single atom-based electrocatalysts are reviewed in this ***,the strategies to improve the bifunctional catalytic activity and stability are ***,the challenges and prospects of Fe-n-C and Co-n-C single atom-based catalysts are well *** review will provide a reference for the directed optimization of Fe-n-C and Co-n-C single atom-based catalysts.

关键词： Fe-n-C Co-n-C single atom bifunctional oxygen electrocatalysts

The Ananthakrishna Model Under non-synchronous Perturbation

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Acta Mathematicae Applicatae Sinica 2024年第4期40卷 1078-1097页

作者： Yi-wen TAO Sue Ann CAMPBELL Jing-li ren school of Mathematics and Statistics Zhengzhou UniversityZhengzhou 450001China Department of Applied Mathematics University of WaterlooWaterloo N2L3G1Canada

The Ananthakrishna model,seeking to explain the Portevin-Le Chatelier effect,is studied with or without non-synchronous *** the unperturbed model,Bogdanov-Takens bifurcation and zeroHopf bifurcation are *** the perturbed model,rich dynamical behaviors are given by researching the Poincarémap,including solutions of different periods,quasi-periodic solutions,chaotic solutions,and ***,an augmented temperature-dependent perturbation amplitude induces a transition from non-serrated to serrated flow on the stress-time ***,on the stress-strain curve,the phenomenon of repeated yielding diminishes with an increase in the value of a temperature-dependent parameter,while it persists with an increase in the value of a temperature-independent *** analysis sheds light on the factors exerting the most significant influence on dislocation density.

关键词： Ananthakrishna model serrations non-synchronous perturbation attractor bifurcation

Plasma-assisted aerogel interface engineering enables uniform Zn^(2+)flux and fast desolvation kinetics toward zinc metal batteries

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Journal of energy Chemistry 2024年第8期95卷 29-38,I0002页

作者： Zijian Xu Zhenhai Shi Zhan Chang Fan Feng Zhuanyi Liu Dongkun Chu Jianguo ren Zi-Feng Ma Suli Chen Tianxi Liu Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material EngineeringJiangnan UniversityWuxi 214122JiangsuChina Shanghai Electrochemical energy Devices Research Center Department of Chemical EngineeringShanghai Jiao Tong UniversityShanghai 200240China BTR new Material Group Co. LTD.Shenzhen 518000GuangdongChina

The poor reversibility of Zn anodes induced by dendrite growth,surface passivation,and corrosion,severely hinders the practical applicability of Zn metal *** address these issues,a plasmaassisted aerogel(PAG)interface engineering was proposed as efficient ion transport modulator that can simultaneously regulate uniform Zn^(2+)flux and desolvation behavior during battery *** PAG with ordered mesopores acted as an ion sieve to homogenize Zn deposition and accelerate Zn^(2+)flux,which is favorable for corrosion resistance and dendrite ***,the plasma-assisted aerogel with abundant hydrophilic groups can facilitate the desolvation kinetics of Zn^(2+)due to the multiple hydrogen-bonding interaction with the activated water molecules,thus accelerating the Zn^(2+)migration ***,the Zn/Zn cell assembled with PAG-modified separator demonstrates stable plating and stripping behavior(over 1400 h at 1 mA cm^(-2))and high Coulombic efficiency(99.8%at1 mA cm^(-2)after 1100 cycles),and the Zn‖MnO_(2)full cell shows excellent long-term cycling stability and maintains a high capacity of 154.9 mA h g^(-1)after 1000 cycles at 1 A g^(-1).This study provides a feasible approach for the large-scale fabrication of aerogel functionalized separators to realize ultra-stable Zn metal batteries.

关键词： Zn metal batteries Aerogel interface Plasma Zn^(2+)migration kinetics Dendrite growth

Influence of variable viscosity and double diffusion on the convective stability of a nanofluid flow in an inclined porous channel

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Applied Mathematics and Mechanics(english Edition) 2024年第3期45卷 563-580页

作者： n.HUMnEKAR D.SRInIVASACHARYA Department of Mathematics National Institute of TechnologyWarangal 506004TelanganaIndia

The influence of variable viscosity and double diffusion on the convective stability of a nanofluid flow in an inclined porous channel is *** DarcyBrinkman model is used to characterize the fluid flow dynamics in porous *** analytical solutions are obtained for the unidirectional and completely developed *** on a normal mode analysis,the generalized eigenvalue problem under a perturbed state is *** eigenvalue problem is then solved by the spectral ***,the critical Rayleigh number with the corresponding wavenumber is evaluated at the assigned values of the other flow-governing *** results show that increasing the Darcy number,the Lewis number,the Dufour parameter,or the Soret parameter increases the stability of the system,whereas increasing the inclination angle of the channel destabilizes the ***,the flow is the most unstable when the channel is vertically oriented.

关键词： nanofluid inclined channel variable viscosity linear stability double dif-fusion porous medium

Dynamic and electrical responses of a curved sandwich beam with glass reinforced laminate layers and a pliable core in the presence of a piezoelectric layer under low-velocity impact

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Applied Mathematics and Mechanics(english Edition) 2024年第1期45卷 155-178页

作者： n.SHAHVEISI S.FELI Department of Mechanical engineering Razi UniversityKermanshah ***Iran

The dynamic responses and generated voltage in a curved sandwich beam with glass reinforced laminate(GRL)layers and a pliable core in the presence of a piezoelectric layer under low-velocity impact(LVI)are *** current study aims to carry out a dynamic analysis on the sandwich beam when the impactor hits the top face sheet with an initial *** the layer analysis,the high-order shear deformation theory(HSDT)and Frostig's second model for the displacement fields of the core layer are *** classical non-adhesive elastic contact theory and Hunter's principle are used to calculate the dynamic responses in terms of *** order to validate the analytical method,the outcomes of the current investigation are compared with those gained by the experimental tests carried out by other researchers for a rectangular composite plate subject to the *** element(FE)simulations are conducted by means of the ABAQUS *** effects of the parameters such as foam modulus,layer material,fiber angle,impactor mass,and its velocity on the generated voltage are reviewed.

关键词： analytical model piezoelectric layer curved sandwich beam glass reinforced laminate(GRL) pliable core low-velocity impact(LVI) classical non-adhesive elastic contact theory

Influence of biomass burning on ozone levels in the Megalopolis of Central Mexico during the COVID-19 lockdown

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Journal of environmental sciences 2024年第9期143卷 99-115页

作者： Victor Almanza Luis Gerardo Ruiz-Suárez ricardo Torres-Jardón Agustín García-Reynoso Iván Y.Hernández-Paniagua Institute for Atmospheric sciences and Climate Change National Autonomous University of MexicoCoyoacan 04510Mexico CityMexico

The massive reductions in anthropogenic emissions resulting from the COVID-19 lockdown provided a unique opportunity to evaluate the effect of mitigation measures aiming to abate air *** Mexico,the total lockdown period took place during the dry-hot season when biomass burning activity is ***,we investigate the role of biomass burning emissions on regional ozone levels in the Megalopolis of Central *** studied period covers the lockdown phases 2 and 3,and the first month of the new *** applied a factor separation technique and process analysis to estimate the pure and synergistic contributions of emission reductions under lockdown and that from biomass burning to daily ozone maximum concentrations in 7 metropolitan areas of different states in the *** results revealed that biomass burning plumes likely masked the effect of massive reductions from mobile emissions,impacted the PBL development during phase 3 and favored transition and mixed nO_(x)-limited and VOC-limited regional *** contributed to increased ozone production in the middle to lower PBL by changing the regional background levels which potentially could bias high ozone production efficiency *** the Megalopolis contribution to economic and societal development at national scale,our study suggests that ozone mitigation measures during the dry-hot season targeting mainly mobile emissions will likely be offset by biomass burning plumes.A regional and synergic policy aiming to control biomass burning would help to reduce the occurrence of high ozone levels in Central Mexico with the co-benefit of tackling short-lived climate pollutants.

关键词： COVID-19 Mexico Megalopolis Ozone Factor Separation Process Analysis