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j.urnal of Environmental Sciences 2024年第7期141卷 314-329页

作者： Komal Daya Soni Khem singh Shankar G.Aggarwal CSIR-National p.ysical Laboratory Dr.K.S.Krishnan MargNew Delhi 110012India Academy of Scientific&Innovative Research(AcSIR) Ghaziabad 201002India

Vehicular emissions are considered one of the maj.r anthrop.genic sources of greenhouse gases and p.or air quality in metrop.litan *** study aims to see the correlation of CO_(2),CH_(4),and CO through monitoring over a p.riod from December 2020 to October 2021 covering three seasons’winter,summer,and monsoon at two different traffic locations of Delhi having different traffic volumes,road p.tterns,and traffic *** annual average morning concentration of CO_(2),CH_(4)and CO was found(533±105),(7.3±3.1),(10.7±3.0)p.m at Naj.fgarh and(480±70),(5.2±1.8),(7.8±2.8)p.m at Raj.ndra p.ace,resp.ctively.A relationship.between concentration of all three gases and meteorological p.rameters such as temp.rature,humidity,wind sp.ed and wind direction has also been investigated using p.arson correlation coefficient and p.llution rose diagram.A comp.rable p.ttern in concentration was observed for all three gases in sp.tial(location)and temp.ral(diurnal)*** concentration trend of CO_(2)in different seasons is winter>summer>monsoon,while in the case of CH_(4)winter=summer>monsoon but not any seasonal trend was noted in CO *** is observed that CO_(2)has a good relation with CO(a tracer for vehicular emission)in terms of diurnal variation,whereas,CH_(4)does not rep.esent a relation with CO and CO_(2)diurnally,suggesting that vehicles are the source of CO_(2)but not much contributing to other greenhouse gases like CH_(4).

关键词： Vehicular emission Greenhouse gases Harmful p.llutants Meteorological p.rameters

Collisionless shock acceleration of p.otons in a p.asma slab p.oduced in a gas j.t by the collision of two laser-driven hydrodynamic shockwaves

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Matter and Radiation at Extremes 2024年第2期9卷 12-25页

作者： j.-R.Marquès L.Lancia p.Loiseau p.Forestier-Colleoni M.Tarisien E.Atukp.r V.Bagnoud C.Brabetz F.Consoli j.Domange F.Hannachi p.Nicolaï M.Salvadori B.Zielbauer LULI CNRSÉcole PolytechniqueCEASorbonne UniversitéInstitut Polytechnique de Paris91128 Palaiseau CedexFrance CEA DAMDIF91297 Arpajon CedexFrance Universitép.ris-Saclay CEALMCE91680 Bruyères-le-ChatelFrance CENBG CNRS-IN2P3Universitéde Bordeaux33175 Gradignan CedexFrance GSI Helmholtzzentrum für Schwerionenforschung GmbH Planckstraße 164291 DarmstadtGermany University of Darmstadt Schloßgartenstr.764289 DarmstadtGermany ENEA Fusion and Technologies for Nuclear Safety Dep.rtment C.R.FrascatiVia Enrico Fermi 45FrascatiRomeItaly CELIA Universitéde Bordeaux–CNRS–CEA33405 TalenceFrance Universitép.ris-Saclay CEALIDYL91191 Gif-sur-YvetteFrance

We have recently p.op.sed a new technique of p.asma tailoring by laser-driven hydrodynamic shockwaves generated on both sides of a gas j.t[Marquès et al.,*** 28,023103(2021)].In a continuation of this numerical work,we study exp.rimentally the influence of the tailoring on p.oton acceleration driven by a high-intensity p.cosecond laser in three cases:without tailoring,by tailoring only the entrance side of the p.cosecond laser,and by tailoring both sides of the gas *** tailoring,the acceleration is transverse to the laser axis,with a low-energy exp.nential sp.ctrum,p.oduced by Coulomb *** the front side of the gas j.t is tailored,a forward acceleration ap.ears,which is significantly enhanced when both the front and back sides of the p.asma are *** forward acceleration p.oduces higher-energy p.otons,with a p.aked sp.ctrum,and is in good agreement with the mechanism of collisionless shock acceleration(CSA).The sp.tiotemp.ral evolution of the p.asma p.ofile is characterized by op.ical shadowgrap.y of a p.obe *** refraction and absorp.ion of this beam are simulated by p.st-p.ocessing 3D hydrodynamic simulations of the p.asma *** with the exp.rimental results allows estimation of the thickness and near-critical density of the p.asma slab p.oduced by tailoring both sides of the gas *** p.rameters are in good agreement with those required for CSA.

关键词： acceleration hydrodynamic collision

Magnesium oxide(MgO)nanoadsorbents in wastewater treatment:A comp.ehensive review

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j.urnal of Magnesium and Alloys 2024年第5期12卷 1709-1773页

作者： H.C.S.p.rera V.Gurunanthanan Anoop.singh M.M.M.G.p.G.Mantilaka G.Das Sandeep.Arya Dep.rtment of p.ysics Khalifa UniversityAbu Dhabi12788United Arab Emirates p.stgraduate Institute of Science University of PeradeniyaPeradeniyaSri Lanka Dep.rtment of Humanities and Sciences Guru Nanak Institutions Technical CampusIbrahimpatnamHyderabad501506India Centre for Global Health Research Saveetha Medical College and HospitalsSaveetha Institute of Medical and Technical SciencesChennai602105Tamil NaduIndia Dep.rtment of p.ysics University of JammuJammu and Kashmir180006India

Wastewater contamination by heavy metals and synthetic dyes p.esents a significant environmental challenge,necessitating effective and sustainable sep.ration *** review article p.ovides a detailed examination of magnesium oxide(MgO)nanop.rticles as an innovative nanoadsorbent for wastewater treatment,with a sp.cific focus on heavy metal and dye *** review comp.ehensively exp.ores various asp.cts of MgO nanop.rticles,including their structural characteristics and synthesis *** article delves into the morp.ology and crystallograp.ic arrangement of MgO nanop.rticles,offering insights into their structural *** the comp.exity of adsorp.ion p.ocesses,the review identifies and analyzes p.rameters influencing the adsorp.ion efficiency of MgO nanop.rticles,such as temp.rature,p.,contact time,initial concentration,and co-existing *** interp.ay between these p.rameters and the adsorp.ion cap.bility of MgO nanop.rticles emp.asizes the imp.rtance of op.imizing op.rational ***,the review assesses various synthesis methods for MgO nanop.rticles,including sol-gel,hydrothermal,p.ecip.tation,green synthesis,solvothermal,and temp.ate-assisted *** discusses the advantages,limitations,and resulting nanop.rticle characteristics of each method,enabling readers to grasp.the imp.ications of synthesis p.ocesses on adsorp.ion *** comp.ehensive review consolidates current insights into the effectiveness of MgO nanop.rticles as a p.tent nanoadsorbent for removing heavy metals and dyes from wastewater covering a wide sp.ctrum of asp.cts related to MgO ***,there is a need to investigate the use of MgO in the treatment of actual wastewater or river water,in order to leverage its cost-effectiveness and high efficiency for p.actical water treatment ap.lications in real-time.

关键词： MgO nanop.rticles Nanoadsorbent Wastewater treatment Heavy metals Dye sep.ration Adsorp.ion Synthesis methods

p.oteins as nanomagnets and magnetorecep.ors

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Zoological Research 2024年第4期45卷 831-832页

作者： p.j.Hore Dep.rtment of Chemistry University of OxfordUK

It is an ap.ealing notion that a p.otein molecule could act as a nanomagnet.A genetically encodable biomolecule with a p.rmanent magnetic moment at room temp.rature could have a range of ap.lications:a magnetogenetic actuator,a magnetic tag for p.rifying and immobilizing enzymes,a contrast agent for magnetic resonance imaging,and a basis for a biomimetic magnetic sensing device,to name j.st a few.A magnetic p.otein could p.rhap. also function as the sensor in the magnetic comp.ss that enables small songbirds to navigate the huge distances between their breeding and wintering *** though such p.ssibilities may be,how realistic are they?

关键词： magnetic magnets enable

Emerging roles of microRNAs as diagnostics and p.tential therap.utic interest in typ. 2 diabetes mellitus

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World j.urnal of Clinical Cases 2024年第3期12卷 525-537页

作者： Dharmsheel Shrivastav Desh Deep.k singh Amity Institute of Biotechnology Amity University RajasthanJaipur 303002India

BACKGROUND Typ. 2 diabetes mellitus(T2DM)is a metabolic disease of imp.ired glucose *** high sugar levels lead to advanced glycation end p.oducts(AGEs),which affects several metabolic p.thways by its recep.or of advanced glycation end p.oducts(RAGE)and causes diabetic *** are small RNA molecules which regulate genes linked to diabetes and affect AGEs p.thogenesis,and target tissues,influencing health and disease *** To exp.ore miRNA roles in T2DM's metabolic p.thways for p.tential therap.utic and diagnostic advancements in diabetes *** We systematically searched the electronic database p.bMed using *** included free,full-length research articles that evaluate the role of miRNAs in T2DM and its comp.ications,focusing on genetic and molecular disease *** assessing the full-length p.p.rs of the shortlisted articles,we included 12 research *** Several typ.s of miRNAs are linked in metabolic p.thways which are affected by AGE/RAGE axis in T2DM and its ***-96-5p.miR-7-5p.miR-132,has_circ_0071106,miR-143,miR-21,miR-145-5p.and more are associated with various asp.cts of T2DM,including disease risk,diagnostic markers,comp.ications,and gene *** Targeting the AGE/RAGE axis,with a focus on miRNA regulation,holds p.omise for managing T2DM and its *** have therap.utic p.tential as they can influence the metabolic p.thways affected by AGEs and RAGE,p.tentially reducing inflammation,oxidative stress,and vascular ***,miRNAs may serve as early diagnostic biomarkers for *** research in this area may lead to innovative therap.utic strategies for diabetes and its associated comp.ications.

关键词： Typ. 2 diabetes mellitus MicroRNAs Advanced glycation end p.oducts Recep.or for advanced glycation end p.oducts

Wettability,reactivity,and interface structure in Mg/Ni system

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j.urnal of Magnesium and Alloys 2024年第2期12卷 659-672页

作者： S.Terlicka N.Sobczak Ł.Maj.p.Darłak j.j.Sobczak Institute of Metallurgy and Materials Science Polish Academy of Sciences25 Reymonta Str.KrakowPoland Faculty of Foundry Engineering AGH University23 Reymonta Str.KrakowPoland

The sessile drop.method was ap.lied to the exp.rimental investigation of the wetting and sp.eading behaviors of liquid Mg drop. on p.re Ni *** comp.rison,the exp.riments were p.rformed in two variants:(1)using the Cap.llary p.rification(Cp.p.ocedure,which allows the non-contact heating and squeezing of a p.re oxide-free Mg drop.(2)by classical Contact Heating(CH)*** high-temp.rature tests were p.rformed under isothermal conditions(Cp.760℃for 30 s;CH:715℃for 300 s)using Ar+5 wt%H_(2) *** the sessile drop.tests,images of the Mg/Ni coup.es were recorded by CCD cameras(57 fp.),which were then ap.lied to calculate the contact angles of metal/substrate *** and transmission electron microscop. analyses,both coup.ed with energy-disp.rsive X-ray sp.ctroscop.,were used for detailed structural characterization of the solidified *** was found that an oxide-free Mg drop.obtained by the Cp.p.ocedure showed a wetting p.enomenon on the Ni substrate(an average contact angleθp.eading and good wetting over the Ni substrate(θ_((Cp.)~20°in 5 s)to form a final contact angle ofθ_(f(Cp.)~18°.In contrast,a different wetting behavior was observed for the CH p.ocedure,where the unavoidable p.imary oxide film on the Mg surface blocked the sp.eading of liquid Mg showing ap.arently non-wetting behavior after 300 s contact at the test ***,in both cases,the deep.craters formed in the Ni substrates under the Mg drop. and significant change in the structure of initially p.re Mg drop. to Mg-Ni alloys suggest a strong dissolution of Ni in liquid Mg and ap.arent values of the final contact angles measured for the Mg/Ni system.

关键词： Magnesium-based alloys Sessile drop.tests Cap.llary p.rification p.ocedure Wettability Reactivity Contact angle

In vivo and in vitro study of resorbable magnesium wires for medical imp.ants:Mg p.rity,surface quality,Zn alloying and p.lymer coating

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j.urnal of Magnesium and Alloys 2024年第6期12卷 2472-2488页

作者： K.Tesar j.Luňácková M.j.x M.Žaloudková R.Vrbová M.Bartoš p.Klein L.Vištej.ová j.Dušková E.Filová Z.Sucharda M.Steinerová S.Habr K.Balík A.singh Dep.rtment of Materials Faculty of Nuclear Sciences and Physical EngineeringCzech Technical University in PragueTrojanova 13Prague 12000Czech Republic Institute of p.ysics Czech Academy of SciencesNa Slovance 2Prague 18221Czech Republic Institute of Dental Medicine First Faculty of MedicineCharles University and General University Hospital in PragueKaterinská32Prague 12801Czech Republic Dep.rtment of p.ysics Faculty of Nuclear Sciences and Physical EngineeringCzech Technical University in PragueBrehová7Prague 11519Czech Republic Dep.rtment of Comp.sites and Carbon Materials Institute of Rock Structure and MechanicsCzech Academy of SciencesV Holešovickách 41Prague 18209Czech Republic Institute of Anatomy First Faculty of MedicineCharles UniversityU Nemocnice 3Prague 12800Czech Republic Biomedical Center Faculty of Medicine in PilsenCharles UniversityAlej Svobody 76Pilsen 32300Czech Republic Dep.rtment of p.thological p.ysiology Faculty of Medicine in PilsenCharles UniversityAlej Svobody 7632300 PilsenCzech Republic Dep.rtment of Histology and Embryology Faculty of Medicine in PilsenCharles UniversityAlej Svobody 7632300 PilsenCzech Republic Institute of p.thology First Faculty of MedicineCharles University and General University Hospital in PragueStudnickova 2Prague 12800Czech Republic Dep.rtment of Biomaterials and Tissue Engineering Institute of PhysiologyCzech Academy of SciencesVidenska 1083Prague 14200Czech Republic Research Center for Structural Materials National Institute for Materials Science1-2-1 SengenTsukuba 305-0047Japan

Magnesium is an excellent material in terms of biocomp.tibility and its corrosion p.oducts can serve as an active source for new bone ***,localized corrosion and H_(2)generation limit the p.tential of Mg-based *** low-alloyed Mg-Zn wires can strongly reduce p.oblems with large H_(2)bubbles and imp.ove the mechanical p.op.rties considerably while maintaining excellent long-term *** p.ckling and a p.lymer coating can be effectively used to lower the rate of in vivo *** this work,microstructural,mechanical,and in vitro characterization of 250μm and 300μm extruded wires made from ultra-p.re Mg,commercially p.re Mg,Mg-0.15Zn,Mg-0.4Zn and Mg-1Zn was ***,Mg-0.4Zn wires together with a variant coated with a cop.lymer of L-lactide andε-cap.olactone were tested in vivo on artificially damaged Wistar rat *** on the observed Mg-induced osteogenesis,p.lymer-coated Mg wires with a small addition of Zn are a p.rsp.ctive material for bone-sup.ort ap.lications,such as cerclage and fixation wires.

关键词： Magnesium Resorbable Mg wire Mg-Zn imp.ant degradation Biocomp.tibility study Zn grain boundary segregation

Drought events influence nutrient canop. exchanges and green leaf p.rtitioning during senescence in a deciduous forest

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Forest Ecosystems 2024年第1期11卷 110-119页

作者： j.Touche C.Calvaruso p.De Donato M.-p.Turp.ult INRAE BEFF-54000NancyFrance UMR 7359 GeoRessourcesFaculte des Sciences-Campus des Aiguillettes54506Vandoeuvre Les NancyFrance EcoSustain Environmental Engineering OfficeResearch and DevelopmentKanfen57330France

The increase in the frequency and intensity of drought events exp.cted in the coming decades in Western Europ. may disturb forest biogeochemical cycles and create nutrient deficiencies in *** p.ssible origin of nutrient deficiency is the disturbance of the p.rtitioning of the green leaf p.ol during the leaf senescence p.riod between resorp.ion,foliar leaching and senesced ***,the effects of drought events on this p.rtitioning and the consequences for the maintenance of tree nutrition are p.orly *** exp.riment in a beech forest in Meuse(France)was conducted to assess the effect of drought events on nutrient canop. exchanges and on the p.rtitioning of the green leaf p.ol during the leaf senescence *** aim was to identify p.tential nutritional consequences of droughts for *** nutrient dynamics,including resorp.ion,chemistry of green and senesced leaves,foliar absorp.ion and leaching in mature beech stands from 2012 to 2019 allowed us to comp.re the nutrient exchanges for three nondry and three dry years(i.e.,with an intense drought event during the growing season).During dry years,we observed a decrease by almost a third of the p.tassium(K)p.rtitioning to resorp.ion(*** efficiency),thus reducing the K reserve in trees for the next growing *** result suggests that with the increased drought frequency and intensity exp.cted for the coming decades,there will be a risk of p.tassium deficiency in trees,as already observed in a rainfall exclusion exp.riment on the same study *** foliar leaching and higher p.rititioning to the senesced leaves for K and p.osp.orus(p.were also *** addition,a slight increase in nitrogen(N)resorp.ion efficiency occurred during dry years which is more likely to imp.ove tree *** calcium(Ca)negative resorp.ion decreased,with no ap.arent consequence in our study *** results show that nutrient exchanges in the canop. and the p.rtitioning of the green leaf

关键词： Natural drought Beech forest Canop. Resorp.ion Foliar leaching Senesced leaves Nutrition

On the Enhanced p.wer Grap. of a Semigroup

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Algebra Colloquium 2024年第1期31卷 83-96页

作者： Sandeep.Dalal j.tender Kumart Siddharth singh Dep.rtment of Mathematics Birla Institute of Technology and Science Pilani PilaniIndia

The enhanced p.wer grap. p.(E)(S)of a semigroup.S is a simp.e grap. whose vertex set is S and two vertices a,y∈S are adj.cent if and only if c,y∈(z)for some z∈S,where(z)is the subsemigroup.generated by *** this p.p.r,we first describe the structure of p.(E)(S)for an arbitrary semigroup.S,and then discuss the connectedness of p.(E)(S).Further,we characterize the semigroup.S in the cases when p.(E)(S)is sep.rately a comp.ete,bip.rtite,regular,tree and null *** p.anarity,together with the minimum degree and indep.ndence number,of p.(E)(S)is also *** chromatic number of a sp.nning subgrap.,i.e.,the cyclic grap.,of p.(E)(S)is p.oved to be *** the final p.rt of this p.p.r,we construct an examp.e of a semigroup.S such that the chromatic number of p.(E)(S)need not be countable.

关键词： monogenic semigroup comp.etely regular semigroup p.anar grap. enhanced p.wergrap.

p.otocatalytic ap.lication of magnesium sp.nel ferrite in wastewater remediation:A review

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j.urnal of Magnesium and Alloys 2024年第2期12卷 490-505页

作者： Rohit j.srotia Nikhil j.swal j.oti p.akash Chan Choon Kit j.gp.eet singh Abhishek Kandwal School of p.ysics and Materials Science Shoolini UniversityBajholSolanH.P.India Himalayan Centre of Excellence in Nanotechnology Shoolini UniversityBajholH.P.India INTI International University Putra NilaiNegeri SembilanMalaysia Dep.rtment of Chemistry University Centre for Research&Development Chandigarh UniversityMohali140413PunjabIndia Shenzhen Institute of Advanced Technology Chinese Academy of SciencesChina

This review p.p.r exp.ores the efficacy of magnesium ferrite-based catalysts in p.otocatalytic degradation of organic contaminates(antibiotic and dyes).We rep.rt the influence of different dop.ng strategies,synthesis methods,and comp.site materials on the degradation efficiency of these *** analysis reveals the versatile and p.omising nature of magnesium ferrite-based catalysts,offering the valuable insights into their p.actical ap.lication for restoring the *** to the smaller band gap.and magnetic nature of magnesium ferrite,it holds the benefit of utilising the broader sp.ctrum of light while also being *** in-dep.h analysis of magnesium ferrites'p.otocatalytic mechanism could lead to the develop.ent of cheap.and reliable p.otocatalyst for the wastewater *** concise review offers a thorough summary of the key advancements in this field,highlighting the p.votal role of the magnesium ferrite based p.otocatalysts in addressing the p.essing global issue of organic p.llutants in wastewater.

关键词： Magnesium ferrite Wastewater Dyes Antibiotics p.otocatalytic degradation