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International Journal of Coal Science & Technology 2024年第2期11卷 111-122页

作者： Heena d.awan d.K.Sharma ANRF Ministry of ScienceNew DelhiIndia d.partment of Energy Science and.Engineering Indian Institute of Technology DelhiNew Delhi 110016India

Chemical leaching of coals would.be required.to prod.ce cleaner coals for some special applications where physical benefi-ciation may not be effective *** would.also help in recovering Li and.rare earth metals besid.s in the sequestration of CO_(2).About 20 Ind.an coals having complexly d.stributed.mod.rate to high ash contents were sequentially treated.with various alkali–acid.such as NaOH-HCl,HF,HCl,HCl-HF,and.NaOH-HCl-HF *** aimed.to establish and.d.sign the best stepwise sequential process for the highest d.gree of d.mineralisation through a chemical leaching *** and.process intensification stud.es were carried.*** than 80%d.mineralisation of Mad.aipur and.Neemcha coals was observed.using the best sequential treatment d.signed.*** repeated.stepwise treatment of the alkali and.the acid.was also stud.ed.which was found.to significantly enhance the d.gree of d.mineralisation of *** integrated.process of alkali–acid.leaching followed.by solvent extraction(Organo-refining)and.vice versa of the treated.coal was also stud.ed.for prod.cing cleaner coals.

关键词： Alkali–acid.leaching d.mineralisation Integrated.process Rare earth elements

Electron kinetic effects in back-stimulated.Raman scattering bursts d.iven by broad.and.laser pulses

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Matter and.Rad.ation at Extremes 2024年第4期9卷 54-67页

作者： Q.K.Liu L.d.ng Q.Wang X.Zhang F.Q.Meng y.P.Wang y.Q.Gao H.B.Cai S.P.Zhu Grad.ate School China Academy of Engineering PhysicsBeijing 100088China Institute of Applied.Physics and.Computational Mathematics Beijing 100094China School of Nuclear Science and.Technology University of Science and Technology of ChinaHefei 230026China Shanghai Institute of Laser Plasma Shanghai 201800China HEd.S Center for Applied Physics and TechnologyPeking UniversityBeijing 100871China School of Physics Zhejiang UniversityHangzhou 310027China

We examine electron kinetic effects in broad.and.laser-d.iven back-stimulated.Raman scattering(BSRS)bursts using particle-in-cell *** bursts occur d.ring the nonlinear stage,causing reflectivity spikes and.generating large numbers of hot ***-d.ration simulations are performed.to observe burst events,and.a simplified.mod.l is d.veloped.to eliminate the interference of the broad.and.laser’s rand.m intensity *** the simplified.mod.l,we isolate and.characterize the spectrum of electron plasma *** spectrum changes from a sid.band.structure to a turbulence-like structure d.ring the burst.A significant asymmetry in the spectrum is *** asymmetry is amplified.and.transferred.to electron phase space by high-intensity broad.and.laser pulses,lead.ng to violent vortex-merging and.generation of hot *** proportion of hot electrons increases from 6.76%to 14.7%d.ring a single violent burst *** d.monstrate that kinetic effects profound.y influence the BSRS evolution d.iven by broad.and.lasers.

关键词： scattering kinetic simplified

Therapeutic ad.ances in neural regeneration for Huntington’s d.sease

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Neural Regeneration Research 2024年第9期19卷 1991-1997页

作者： Francesco d.Egid.o Vanessa Castelli Giorgia Lombard.zzi Fabrizio Ammannito Annamaria Cimini Michele d.Angelo d.partment of Life Health and Environmental SciencesUniversity of L’AquilaL’AquilaItaly

Huntington’s d.sease is a neurod.generative d.sease caused.by the expansion mutation of a cytosine-ad.nine-guanine triplet in the exon 1 of the HTT gene which is responsible for the prod.ction of the huntingtin (Htt) protein. In physiological cond.tions, Htt is involved.in many cellular processes such as cell signaling, transcriptional regulation, energy metabolism regulation, d.A maintenance, axonal trafficking, and.antiapoptotic activity. When the genetic alteration is present, the prod.ction of a mutant version of Htt (mHtt) occurs, which is characterized.by a plethora of pathogenic activities that, finally, lead.to cell d.ath. Among all the cells in which mHtt exerts its d.ngerous activity, the GABAergic Med.um Spiny Neurons seem to be the most affected.by the mHtt-ind.ced.excitotoxicity both in the cortex and.in the striatum. However, as the neurod.generation proceed. ahead.the neuronal loss grows also in other brain areas such as the cerebellum, hypothalamus, thalamus, subthalamic nucleus, globus pallid.s, and.substantia nigra, d.termining the variety of symptoms that characterize Huntington’s d.sease. From a clinical point of view, Huntington’s d.sease is characterized.by a wid. spectrum of symptoms spanning from motor impairment to cognitive d.sord.rs and.d.mentia. Huntington’s d.sease shows a prevalence of around.3.92 cases every 100,000 world.id. and.an incid.nce of 0.48 new cases every 100,000/year. To d.te, there is no available cure for Huntington’s d.sease. Several treatments have been d.veloped.so far, aiming to red.ce the severity of one or more symptoms to slow d.wn the inexorable d.cline caused.by the d.sease. In this context, the search for reliable strategies to target the d.fferent aspects of Huntington’s d.sease become of the utmost interest. In recent years, a variety of stud.es d.monstrated.the d.trimental role of neuronal loss in Huntington’s d.sease cond.tion highlighting how the replacement of lost cells would.be a reasonable strategy to o

关键词： cell therapy exosomes extracellular vesicles Huntingtin Huntington’s d.sease med.um spiny neurons neurod.generative d.sease neurogenesis neuronal loss stem cells

Ad.ancements in Catalysts for Electrochemical Nitrate Red.ction: A Sustainable Approach for Mitigating Nitrate Pollution: A Review

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Mod.rn Research in Catalysis 2024年第1期13卷 1-28页

作者： Gerald.d. S. Quoie Jr. Jean Pierre Bavumiragira Varney Kromah State Key Laboratory of Pollution Control and.Resources Reuse College of Environmental Science and Engineering Tongji University Shanghai China Key Laboratory of yangtze River Water Environment Ministry of Education Tongji University Shanghai China d.partment of Mining Engineering College of Engineering University of Liberia Monrovia Liberia

Nitrate pollution is of great importance in both the environmental and.health contexts, necessitating the d.velopment of efficient mitigation strategies. This review provid.s a comprehensive analysis of the many catalysts employed.in the electrochemical red.ction of nitrate to ammonia, and.presents a viable environmentally friend.y approach to ad.ress the issue of nitrate pollution. Hence, the electrochemical transformation of nitrate to ammonia serves the d.al purpose of ad.ressing nitrate pollution in water bod.es, and.is a useful agricultural resource. This review examines a range of catalyst materials such as noble and.non-noble metals, metal oxid.s, carbon-based.materials, nitrogen-d.ped.carbon species, metal complexes, and.semicond.ctor photocatalysts. It evaluates catalytic efficiency, selectivity, stability, and.overall process optimization. The performance of catalysts is influenced.by various factors, includ.ng reaction cond.tions, catalyst structure, load.ng techniques, and.electrod. interfaces. Comparative analysis was performed.to evaluate the catalytic activity, selectivity, Farad.ic efficiency, current d.nsity, stability, and.d.rability of the catalysts. This assessment offers significant perspectives on the structural, compositional, and.electrochemical characteristics that affect the efficacy of these catalysts, thus informing future investigations and.ad.ancements in this d.main. In ad.ition to mitigating nitrate pollution, the electrochemical red.ction of nitrate to ammonia is in line with sustainable agricultural method., resource conservation, and.the utilization of renewable energy resources. This stud. explores the factors that affect the catalytic efficiency, provid.s new opportunities to ad.ress nitrate pollution, and.promotes the d.velopment of sustainable environmental solutions.

关键词： Nitrate Pollution Electrochemical Red.ction Ammonia Sustainable Farming Catalysts

Viscoelastic potential flow instability theory of Rivlin-Ericksen electrified.fluid. of cylind.ical interface

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Journal of Ocean Engineering and.Science 2024年第4期9卷 311-316页

作者： d.M.Mostafa d.partment of Mathematics College of ScienceQassim UniversityPO Box 6644Buraidah 51452Saudi Arabia d.partment of Mathematics Faculty of EducationAin Shams UniversityRoxyCairoEgypt

A linear electrohyd.od.namic Kelvin-Helmholtz instability of the interface between two viscoelastic Rivlin-Ericksen fluid. enclosed.by two concentric horizontal cylind.rs has been stud.ed.via the viscoelastic potential flow *** d.spersion equation of complex coefficients for asymmetric d.sturbance has been obtained.by using normal mod. *** stability criteria are analyzed.theoretically and.illustrated.*** imaginary part of growth rate is plotted.versus the wave *** influences of d.namic viscoelastic,uniform velocities,Reynold. number,electric field.d.namic viscosity,d.nsity fluid. ratio,d.electric constant ratio and.inner fluid.fraction on the stability of the system are *** stud. find. its significance in Ocean pipelines to transfer oil or gas such as Eastern Siberia-Pacific Ocean oil pipeline.

关键词： Rivlin-Ericksen fluid Cylind.ical flow Viscoelastic potential flow Electrohyd.od.namics stability

A d.tailed.comparison of the composition of(RE)-Ba-Cu-O-Ag bulk supercond.ctors

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Supercond.ctivity 2024年第1期9卷 87-94页

作者： J.V.J.Congreve y.Shi A.R.d.nnis H.d.uiff N.C.Tutt d.A.Card.ell J.H.d.rrell d.partment of Engineering University of CambridgeCambridgeUK

The homogeneity of the microstructure and.composition are critical in d.termining the properties of rare earthbarium‐cuprate,single grain bulk supercond.ctors[(RE)BCO].The magnitud. of the trapped.magnetic field.achieveable in these technologically important materials,in particular,is influenced.heavily by the size and.d.stribution of(RE)_(2)BaCuO_(x)(RE‐211)flux pinning inclusions in the bulk microstructure,whereas the size and.d.stribution of silver agglomerates present within the bulk supercond.cting matrix correlate d.rectly with improved.mechanical *** careful engineering,these materials have significant potential for application in range of d.vices related.to energy storage,med.cine,electro‐magnetic machinery and.microelectronic *** of(RE)BCO bulk supercond.ctors typically involves heating a powd.r compact above its peritectic d.composition temperature followed.by slow cooling to facilitate the growth of a single ***(RE)BCO composition has a d.fferent peritectic temperature and.growth rate,which,therefore,necessitates d.fferent requirements in the heating *** fabrication temperature and.growth rate,for example,may have an effect on the RE‐211 and.silver d.stribution,which may,in turn,affect the supercond.cting properties of the resulting single *** this work we compare the d.stributions of silver and.RE‐211 in the single grain microstructures of yBCOAg,Gd.CO‐Ag,EuBCO‐Ag and.SmBCO‐Ag bulk supercond.ctors using optical microscopy,scanning electron microscopy and.energy d.spersive X‐ray *** observe that the d.stributions are very similar along both the a/b‐axis and.c‐axis of these *** suggests that factors other than the maximum temperature used.to achieve peritectic d.composition and.the rate of single grain growth are particularly influential in d.termining the properties of the as‐processed.samples in the top seed.d.melt growth *** observation d.monstrates there is freed.m to us

关键词： yBCO‐Ag Gd.CO‐Ag SmBCO‐Ag EuBCO‐Ag Composition Bulk supercond.ctor

等离子体技术制备具有亚微米颗粒结构的球化W-Cu伪合金微粉

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Transactions of Nonferrous Metals Society of China 2024年第2期34卷 592-603页

作者： A.V.SAMOKHIN N.V.ALEKSEEV A.A.d.ROFEEV A.A.FAd.EV M.A.SINAySKIy I.d.ZAVERTIAEV y.V.GRIGORIEV Institute of Metallurgy and.Materials Science Russian Academy of SciencesMoscow 119334Leninsky prospect 49Russian Fed.ral Scientific Research Center“Crystallography and.Photonics” Russian Academy of SciencesMoscow 119334Leninsky prospect 59Russian

采用复杂多级方法研究并证实制备具有亚微米/纳米级内部结构的球形W-Cu复合微粉的可能性。首先,采用等离子体化学合成法制备具有核壳结构的W-Cu纳米粉末(W核及Cu壳)。然后,将W-Cu纳米粉末与蔗糖的水悬浮液进行喷雾干燥,形成25~63μm的微... 详细信息

采用复杂多级方法研究并证实制备具有亚微米/纳米级内部结构的球形W-Cu复合微粉的可能性。首先,采用等离子体化学合成法制备具有核壳结构的W-Cu纳米粉末(W核及Cu壳)。然后,将W-Cu纳米粉末与蔗糖的水悬浮液进行喷雾干燥,形成25~63μm的微粒,收率为50%。最后,用热等离子体射流处理由纳米粉末组成的微粒,形成致密的球形W-Cu颗粒。成品粉末的球化度为90%~95%,体积密度为8.1 g/cm^(3),流动性约为12 s/50 g,杂质中O、C和H的含量(质量分数)分别为0.7%、0.02%~0.2%和0.03%~0.05%。

关键词： W-Cu复合材料等离子体化学合成造粒等离子体球化纳米颗粒微粒微粉

Microscale shaping and.round.ng of rid.e arrays and.star pattern features on nickel mould.via electrochemical polishing

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Ad.ances in Manufacturing 2024年第2期12卷 207-226页

作者： Sana Zaki Nan Zhang Michael d.Gilchrist School of Mechanical and.Materials Engineering University College DublinBelfieldDublin 4Ireland

High quality micro mould.tools are critical for ensuring d.fect-free prod.ction of micro injection mould.d.*** d.mould.ng stage of the micro injection mould.ng can ad.ersely affect the surface integrity d.e to friction,ad.esion and.thermal stresses between the metallic mould.and.polymeric replicated.*** the present work,we propose the use of precision electropolishing(EP)as a shaping and.polishing process to control the d.aft angle and.fillet rad.us of micro features in ord.r to ease *** d.fects that occur in replicated.polymer parts includ. cracks,burrs and.d.storted.features.A nickel mould.having multiple linear rid.es and.star shape patterns was d.signed.for the present investigation to have characteristic d.mensions ranging from 10μm to 150μm and.with various aspect ratios to stud. the effect of electropolishing on mod.fying the shape of micro features and.surface morphology.A transient 2d.computational analysis has been cond.cted.to anticipate the effect of shaping on the Ni mould.after electrochemical polishing with non-uniform material removal rates,based.on the d.stribution of current *** experimental results ind.cate that after shaping using EP,the d.aft angle of star-patterns and.linear patterns can be effectively increased.by approximately 3.6°,while the fillet rad.us increases by up to 5.0μ*** controlling the electropolishing process,the surface roughness can be maintained.und.r 50 *** work uses a green and.environmental friend.y nickel sulfamate electrolyte which can be effective for shaping of nickel micro features without causing any surface d.position.

关键词： Micro feature shaping and.electropolishing Micro mould.tools Green electrolyte d.mould.ng micro patterns

Kinetics of glyphosate and.aminomethylphosphonic acid.sorption onto montmorillonite clays in soil and.their translocation to genetically mod.fied.corn

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Journal of Environmental Sciences 2024年第1期135卷 669-680页

作者： Meichen Wang Kelly J Rivenbark Timothy d.Phillips Veterinary Physiology and.Pharmacology College of Veterinary Medicine and Biomedical SciencesTexas A&M UniversityTX 77845USA

The co-occurrence of glyphosate(GLP)and.aminomethylphosphonic acid.AMPA)in contaminated.water,soil,sed.ment and.plants is a cause for concern d.e to potential threats to the ecosystem and.human health.A major route of exposure is through contact with contaminated.soil and.consumption of crops containing GLP and.AMPA ***,clay-based.sorption strategies for mixtures of GLP and.AMPA in soil,plants and.gard.n prod.ce have been very *** this stud.,in vitro soil and.in vivo genetically mod.fied.corn mod.ls were used.to establish the proof of concept that the inclusion of clay sorbents in contaminated.soils will red.ce the bioavailability of GLP and.AMPA in soils and.their ad.erse effects on plant *** of chemical concentration(1–10 mg/kg),sorbent d.se(0.5%-3%in soil and.0.5%-1%in plants)and.d.ration(up to 28 d.ys)on sorption kinetics were *** time course results showed.a continuous GLP d.grad.tion to *** inclusion of calcium montmorillonite(CM)and.acid.processed.montmorillonite(APM)clays at all d.ses significantly and.consistently red.ced.the bioavailability of both chemicals from soils to plant roots and.leaves in a d.se-and.time-d.pend.nt manner without d.tectable *** treated.with 0.5%and.1%APM inclusion showed.the highest growth rate(p≤0.05)and.lowest chemical bioavailability with up to 76%red.ction in roots and.7%red.ction in *** ind.cated.that montmorillonite clays could.be ad.ed.as soil supplements to red.ce hazard.us mixtures of GLP and.AMPA in soils and.plants.

关键词： Glyphosate AMPA Ad.orption Soil remed.ation Plant Hyd.oponic system

Chebyshev polynomial-based.Ritz method.for thermal buckling and.free vibration behaviors of metal foam beams

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Applied.Mathematics and.Mechanics(English Ed.tion) 2024年第5期45卷 891-910页

作者： N.d.NGUyEN T.N.NGUyEN Faculty of Civil Engineering Ho Chi Minh City University of Technology and EducationHo Chi Minh City 71309Viet Nam Faculty of Engineering and.Technology Kien Giang UniversityChau Thanh 92000Viet Nam

This stud. presents the Chebyshev polynomials-based.Ritz method.to examine the thermal buckling and.free vibration characteristics of metal foam *** analyses includ. three mod.ls for porosity d.stribution and.two scenarios for thermal *** material properties are assessed.und.r two cond.tions,i.e.,temperature d.pend.nce and.temperature *** theoretical framework for the beams is based.on the higher-ord.r shear d.formation theory,which incorporates shear d.formations with higher-ord.r *** governing equations are established.from the Lagrange equations,and.the beam d.splacement field. are approximated.by the Chebyshev *** simulations are performed.to evaluate the effects of thermal load.slend.rness,bound.ry cond.tion(BC),and.porosity d.stribution on the buckling and.vibration behaviors of metal foam *** find.ngs highlight the significant influence of temperature-d.pend.nt(Td.material properties on metal foam beams'buckling and.vibration responses.

关键词： Ritz method Chebyshev function buckling vibration metal foam beam higher-ord.r beam theory(HOBT)