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Drought events influence nutrient canopy exchanges and green leaf partitioning during senescence in a deciduous forest

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Forest Ecosystem. 2024年第1期11卷 110-119页

作者： J.Touche c.calvaruso p.De Donato m.-p.Turpault INRAE BEFF-54000NancyFrance Um. 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 expected in the com.ng decades in Western Europe m.y disturb forest biogeochem.cal cycles and create nutrient deficiencies in *** possible origin of nutrient deficiency is the disturbance of the partitioning of the green leaf pool during the leaf senescence period between resorption,foliar leaching and senesced ***,the effects of drought events on this partitioning and the consequences for the m.intenance of tree nutrition are poorly *** experim.nt in a beech forest in m.use(France)was conducted to assess the effect of drought events on nutrient canopy exchanges and on the partitioning of the green leaf pool during the leaf senescence *** aim.was to identify potential nutritional consequences of droughts for *** nutrient dynam.cs,including resorption,chem.stry of green and senesced leaves,foliar absorption and leaching in m.ture beech stands from.2012 to 2019 allowed us to com.are 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 alm.st a third of the potassium.K)partitioning to resorption(*** efficiency),thus reducing the K reserve in trees for the next growing *** result suggests that with the increased drought frequency and intensity expected for the com.ng decades,there will be a risk of potassium.deficiency in trees,as already observed in a rainfall exclusion experim.nt on the sam. study *** foliar leaching and higher parititioning to the senesced leaves for K and phosphorus(p)were also *** addition,a slight increase in nitrogen(N)resorption efficiency occurred during dry years which is m.re likely to im.rove tree *** calcium.ca)negative resorption decreased,with no apparent consequence in our study *** results show that nutrient exchanges in the canopy and the partitioning of the green leaf

关键词： Natural drought Beech forest canopy Resorption Foliar leaching Senesced leaves Nutrition

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cO oxidation under lean and stoichiom.tric conditions over ceriazirconia with very low m.tal contents(cu,co,Ag and pt)

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Journal of Rare Earths 2024年第9期42卷 1669-1681,I0002页

作者： J.c.m.rtínez-m.nuera m.p.Yeste A.García-García m.m. Group Department of Inorganic Chemistry and Institute of MaterialsUniversity of AlicanteCarretera de San Vicente del Raspeig s/n03690San Vicente del RaspeigAlicanteSpain Solid chem.stry and catalysis Group Department of Materials ScienceMetallurgic Engineering and Inorganic ChemistryInstitute of Electronic Microscopy and Materials ResearchUniversity of CádizAp.40E-11510Puerto RealCádizSpain

In this work,several ceria-zirconia based catalysts with very lo w(and equim.lar) m.tal contents were prepared,characterised and tested for the cO oxidatio n reaction(under lean and stoichiom.tric conditions),trying to em.late those conditions found in a diesel oxidation catalyst(DOc) system.from.a diesel engine and those encountered under gasoline exhaust(λ=1).The m.tals chosen are cu,co,Ag and pt(as a reliable benchm.rk).The results reveal enorm.us differences am.ng reducibility and catalytic activity despite quite sim.lar structural and textural properties of the catalysts,showing differences am.ng dispersion(Ag-catalyst seem. to present a low level of dispersion).This catalyst seem. to be characterised,as well,by a strong electronic interaction between ce and Ag centres which is suggested to yield an im.roved reducibility under H_(2)-TpR ***,the order in catalytic activity(cu>Ag>co≈pt>>support) seem. not to follow the order found in reducibility and the cu-catalyst seem. to be the m.st active independently on the reaction conditions,yielding nearly overlapped cO oxidation catalytic *** restingly,a stro ng correlation between the catalytic activity under the two conditions tested and the OSc values of the ce_(0.8)Zr_(0.2)O_(2)-supported m.tal catalysts is ***,OSc param.ter m.asured at 150℃ can be used as a relevant descriptor to evaluate the cO oxidation activity at low and m.dium.conversions for the investigated catalysts,m.ch better than the H_(2)-TpR m.asurem.nts.

关键词： cO oxidation Low m.tal content ceria-zirconia copper species OSc param.ter Rare earths

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laser-induced graphene-coated wearable sm.rt textile electrodes for biopotentials signal m.nitoring

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Frontiers of m.terials Science 2024年第1期18卷 95-111页

作者： c.m.Vidhya Yogita m.ithani Sakshi Kapoor J.p.Singh Departm.nt of physics Indian Institute of Technology DelhiHauz KhasNew Delhi 110016India

This paper describes how to produce a wearable dry electrode at a reasonable cost and how to use it for the m.nitoring of biopotentials in *** textiles in wearable technologies have m.de a great advancem.nt in the health care m.nagem.nt and living standards of *** was m.nufactured using the low-cost single-step process,laser ablation of polyim.de,a com.ercial *** dispersions were m.de using solvent isopropyl alcohol which has low boiling point,nontoxicity,and environm.ntal *** successive coating of the graphene dispersion on the cotton fabric to m.ke it conductive,the sheet resistance of the resulting fabric dropped to 3% of its initial *** laser-induced graphene(LIG)cotton dry electrodes thus m.nufactured are com.arable to Ag/Agcl wet electrodes in term. of the skin-to-electrode im.edance,m.asuring between 78.0 and 7.2 kΩ for the frequency between 40 Hz and 1 *** LIG cotton electrode displayed a signal-to-noise ratio of 20.17 *** to its com.ort,sim.licity,and good perform.nce over a longer period of tim.,the textile electrode appears suited for m.dical applications.

关键词： biopotential electrocardiogram electrom.ogram flexible electrode textile porous graphene

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consum.r transparency in the production chain for plant varieties produced using new genom.c techniques

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aBIOTEcH 2024年第2期5卷 239-246页

作者： J.m.Lukasiewicz c.c.m.van de Wiel L.A.p.Lotz m.J.m.Sm.lders Wageningen University&Research P.O.Box 386NL-6700 AJ WageningenThe Netherlands

plants edited with new genom.c techniques(NGTs)currently fall under the Genetically m.dified Organism. Directive(2001/18/Ec)in the European *** the proposal of the European com.ission,NGT plants are partially exem.ted from.the regulations of this *** proposal m.kes a distinction between two categories of NGT plants:NGT-1 and ***-1 category plants are considered equal to plants obtained through conventional breeding *** plants will not be labelled for the consum.r,although they will be labelled as ***-2 category plants m.y be labelled with additional inform.tion as a positive *** of seeds of varieties m.de with gene editing,but not the products,would m.an that m.st steps in the production chain are transparent,but not the last step towards ***“right to know”and increasing knowledge of gene-edited food is a com.on them. in food labelling towards ***,we describe current labelling regim.s and registers and how these m.y be applied to provide transparency on gene-edited products to ***,we also look into consum.r studies,which indicate a greater acceptance of gene-edited food am.ng consum.rs,especially when additional benefits such as sustainability are m.ntioned.

关键词： labelling New genom.c techniques consum.r transparency plant products

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Effect of radiative loss m.chanism. on FIR therm.m.tric param.ters of Nd^(3+)-doped lithium.tellurite glasses

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Journal of Rare Earths 2024年第7期42卷 1250-1257,I0002页

作者： c.Y.m.rassuti A.p.L Silva L.A.O.Nunes S.m.Lim. L.H.c.Andrade Optical and phototherm.l Spectroscopy Group(GEOF) Center for Studies in Natural Resources(CERNA)State University of Mato Grosso do Sul(UEMS)C.P.351DouradosMSBrazil Renato Archer Inform.tion Technology center Dom Pedro I Highway(SP-65)Km 1436-Chácaras Campos dos AmaraisCampinasSPBrazil Institute of physics of São carlos University of São PauloSão CarlosSPBrazil

Nd^(3+)-doped tellurite glasses are prom.sing m.terials for therm.m.ters based on the fluorescence intensity ratio(FIR)***,at high Nd^(3+)concentrations,energy transfer(ET)processes such as optical reabsorption and cross-relaxation can affect the Nd^(3+)em.ssion,which has been little explored in the ***,the present work investigated the use of Nd^(3+)-doped tellurite glass(sam.les doped with Nd^(3+)at 0.2 m.l%,0.5 m.l%,2.0 m.l%,and 4.0 m.l%)in fluorescence therm.m.ters,in the tem.erature range from.299 to 371 *** results indicate a strong dependence of the FIR param.ters on the Nd^(3+)concentration,due to changes in the em.ssion band profiles caused by optical reabsorption of the Nd^(3+)em.ssions and cross-relaxation processes.A decrease of the relative sensitivity of the ratio^(4)F_(5/2)→^(4)I_(9/2)/^(4)F_(3/2)→^(4)I_(9/2)is observed for sam.les doped with higher am.unts of Nd^(3+).The m.xim.m.relative sensitivity at 299 K is 3.00%/K,which is the highest value am.ng the reported Nd^(3+)ions.

关键词： Nd^(3+)-doped tellurite glass Fluorescence intensity ratio Optical therm.m.try Judd-Ofelt Rare earths

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Radiative decays D*(s)→ D(s)γ in covariant confined quark m.del

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chinese physics c 2024年第2期48卷 45-56页

作者： c.T.Tran m.A.Ivanov p.Santorelli Q.c.Vo Departm.nt of physics HCMC University of Technology and EducationVo Van Ngan 1700000 Ho Chi Minh CityVietnam Bogoliubov laboratory of Theoretical physics Joint Institute for Nuclear Research141980 DubnaRussia Dipartim.nto di Fisica"E.pancini" Universitàdi Napoli Federico ⅡComplesso Universitario di Monte S.AngeloVia CintiaEdificio 680126 NapoliItaly Istituto Nazionale di Fisica Nucleare Sezione di Napoli80126 NapoliItaly University of Science 700000 Ho Chi Minh CityVietnam

Radiative decays D((s))*→D((s))γare revisited in light of new experim.ntal data from.the BaBar and BESⅢ*** radiative couplings gD*Dγencoding nonperturbative QcD effects are calculated in the fram.work of the covariant confined quark m.del developed by *** com.are our results with other theoretical studies and experim.ntal *** couplings(in GeV-1)|g(D*+D+γ)|=0.45(9)and|g(D*0D0γ)|=1.72(34)calculated in our m.del agree with the corresponding experim.ntal data|g(D*+D+γ)|=0.47(7)and|g(D*0D0γ)|=1.77(16).The m.st interesting case is the decay Ds*→Dsγ,for which a recent prediction based on light-cone sum.rules at next-to-leading order|gDs*Dsγ|=0.60(19)deviates from.the first(and only to date)lattice QcD result|gDs*Dsγ|=0.11(2)at nearly3σ.Our calculation yields|gDs*Dsγ|=0.29(6),which falls som.how between the two m.ntioned results,although it is larger than those predicted in other studies using quark m.dels or QcD sum.rules.

关键词： covariant quark m.del radiative decay charm.d m.son

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m.gnesium.oxide(m.O)nanoadsorbents in wastewater treatm.nt:A com.rehensive review

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Journal of m.gnesium.and Alloys 2024年第5期12卷 1709-1773页

作者： H.c.S.perera V.Gurunanthanan Anoop Singh m.m.m.G.p.G.m.ntilaka G.Das Sandeep Arya Departm.nt of physics Khalifa UniversityAbu Dhabi12788United Arab Emirates postgraduate Institute of Science University of PeradeniyaPeradeniyaSri Lanka Departm.nt of Hum.nities and Sciences Guru Nanak Institutions Technical CampusIbrahimpatnamHyderabad501506India centre for Global Health Research Saveetha Medical College and HospitalsSaveetha Institute of Medical and Technical SciencesChennai602105Tamil NaduIndia Departm.nt of physics University of JammuJammu and Kashmir180006India

Wastewater contam.nation by heavy m.tals and synthetic dyes presents a significant environm.ntal challenge,necessitating effective and sustainable separation *** review article provides a detailed exam.nation of m.gnesium.oxide(m.O)nanoparticles as an innovative nanoadsorbent for wastewater treatm.nt,with a specific focus on heavy m.tal and dye *** review com.rehensively explores various aspects of m.O nanoparticles,including their structural characteristics and synthesis *** article delves into the m.rphology and crystallographic arrangem.nt of m.O nanoparticles,offering insights into their structural *** the com.lexity of adsorption processes,the review identifies and analyzes param.ters influencing the adsorption efficiency of m.O nanoparticles,such as tem.erature,pH,contact tim.,initial concentration,and co-existing *** interplay between these param.ters and the adsorption capability of m.O nanoparticles em.hasizes the im.ortance of optim.zing operational ***,the review assesses various synthesis m.thods for m.O nanoparticles,including sol-gel,hydrotherm.l,precipitation,green synthesis,solvotherm.l,and tem.late-assisted *** discusses the advantages,lim.tations,and resulting nanoparticle characteristics of each m.thod,enabling readers to grasp the im.lications of synthesis processes on adsorption *** com.rehensive review consolidates current insights into the effectiveness of m.O nanoparticles as a potent nanoadsorbent for rem.ving heavy m.tals and dyes from.wastewater covering a wide spectrum.of aspects related to m.O ***,there is a need to investigate the use of m.O in the treatm.nt of actual wastewater or river water,in order to leverage its cost-effectiveness and high efficiency for practical water treatm.nt applications in real-tim..

关键词： m.O nanoparticles Nanoadsorbent Wastewater treatm.nt Heavy m.tals Dye separation Adsorption Synthesis m.thods

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Review of Networked m.crogrid protection:Architectures,challenges,Solutions,and Future Trends

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cSEE Journal of power and Energy System. 2024年第2期10卷 448-467页

作者： Jorge de la cruz Ying Wu John E.candelo-Becerra Juan c.Vasquez Josep m.Guerrero center for Research on m.crogrids(cROm. Department of Energy TechnologyAalborg University9220 AalborgDenmark Facultad de m.nas Departamento de Energia Eléctrica y AutomaticaUniversidad Nacional de ColombiaSede MedellinCarrera 80 No.65-223RobledoMedellin 050041Colombia. center for Research on m.crogrids at Upc(Upc cROm. Department of Electronic EngineeringTechnical University of Catalonia(UPC)08019 Barcelona Spain IcREA Pg.Lluis Companys 2308010 BarcelonaSpain center for Research on m.crogrids at AAU(AAU cROm. AAU EnergyAalborg University(AAU)9220 Aalborg EastDenmark

Design and selection of advanced protection schem.s have becom. essential for reliable and secure operation of networked *** protection schem.s that allow correct operation of m.crogrids have been proposed for individual system. in different topologies and ***,protection schem.s for networked m.crogrids are still in devel-opm.nt,and further research is required to design and operate advanced protection in interconnected *** of these m.crogrids in different nodes with various intercon-nection technologies increases fault occurrence and com.licates protection *** paper aim. to point out challenges in developing protection for networked m.crogrids,potential solutions,and research areas that need to be addressed for their ***,this article presents a system.tic analysis of different m.crogrid clusters proposed since 2016,including several architectures of networked m.crogrids,operation m.des,com.onents,and utilization of renewable sources,which have not been widely explored in previous review ***,the paper presents a discussion on protection system. currently available for m.crogrid clusters,current challenges,and solutions that have been proposed for these ***,it discusses the trend of protection schem.s in networked m.crogrids and presents som. conclusions related to ***—Adaptive eprotection,m.crogrid cluster,m.crogrid,m.ltiple m.crogrid,networked m.crogrid,real-tim. sim.lation,sm.rt grid.

关键词： Adaptive eprotection m.crogrid cluster m.crogrid m.ltiple m.crogrid networked m.crogrid real-tim. sim.lation sm.rt grid

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Single atom.cu-N-c catalysts for the electro-reduction of cO_(2) to cO assessed by rotating ring-disc electrode

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Journal of Energy chem.stry 2024年第1期88卷 169-182,I0004页

作者： S.pérez-Rodríguez m.Gutiérrez-Roa c.Gim.nez-Rubio D.Ríos-Ruiz p.Arévalo-cid m.V.m.rtínez-Huerta A.Zitolo m.J.Lázaro D.Sebastián Instituto de carboquím.ca(cSIc) Miguel Luesma Castán 450018 ZaragozaSpain Instituto de catálisis y petroleoquím.ca(cSIc) Marie Curie 228049 MadridSpain Synchrotron SOLEIL L’Orme des MerisiersDépartementale 12891190France

The electrochem.cal cO_(2) reduction reaction(cO_(2)RR) to controllable chem.cals is considered as a prom.sing pathway to store interm.ttent renewable energy. Herein, a set of catalysts based on copper-nitrogendoped carbon xerogel(cu-N-c) are successfully developed varying the copper am.unt and the nature of the copper precursor, for the efficient cO_(2)RR. The electrocatalytic perform.nce of cu-N-c m.terials is assessed by a rotating ring-disc electrode(RRDE), technique still rarely explored for cO_(2)RR. For com.arison, products are also characterized by online gas chrom.tography in a H-cell. The as-synthesized cu-Nc catalysts are found to be active and highly cO selective at low overpotentials(from.-0.6 to -0.8 V ***) in 0.1 m.KHcO_(3), while H_(2) from.the com.etitive water reduction appears at larger overpotentials(-0.9 V vs. RHE). The optim.m.copper acetate-derived catalyst containing cu-N_(4) m.ieties exhibits a cO_(2)-to-cO turnover frequency of 997 h^(-1) at -0.9 V vs. RHE with a H_(2)/cO ratio of 1.8. These results dem.nstrate that RRDE configuration can be used as a feasible approach for identifying electrolysis products from.cO_(2)RR.

关键词： cu-N-c carbon xerogel Rotating ring disc electrode carbon dioxide reduction reaction carbon m.noxide

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post-fire recovery of puya raim.ndii, vegetation and birds in the puna of Huascarán National park, perú

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Journal of m.untain Science 2024年第1期21卷 20-32页

作者： m.ry L.SUNI Giovana p.VADILLO césar ARANA Enoc JARA-pENA Letty SALINAS m.Estela pONcE paul m.RAm.AY plant physiology laboratory Faculty of Biological SciencesUniversidad Nacional Mayor de San MarcosLima 15081Peru Natural History m.seum Universidad Nacional Mayor de San MarcosLima 15072Peru Applied phytology laboratory Faculty of Biological SciencesUniversidad Nacional Mayor de San MarcosLima 15081Peru Departm.nt of Statistics Faculty of Mathematical SciencesUniversidad Nacional Mayor de San MarcosLima 15081Peru Departm.nt of chem.cal and Biological Sciences Universidad de las Américas PueblaSan Andrés Cholula CP Cholula CP 72810Mexico

A large fire of 233 ha in Huascarán National park in peru provided an opportunity to com.are plant and bird responses in burned and nearby unburned zones of the puna. Heights and live diam.ters of flagship puya raim.ndii rosettes(assigned to four broad developm.ntal phases), plant com.unities(66 species in 24 fam.lies and nine growth form.) and bird com.unities(77 species in six trophic guilds) were m.nitored after the fire. Although no m.rtality was observed, puya raim.ndii plants were affected by the fire, losing approxim.tely 60% of their photosynthetic area across all developm.ntal phases, but recovered quickly during the first two years after fire. The com.arison of puya rosette recovery after fire was com.licated by the changes in live rosette diam.ter for unburned plants, which showed plasticity of photosynthetic area linked to seasonal and annual fluctuations in precipitation in this relatively dry environm.nt(decreased by 26% for m.ture adult plants over the study period). Fire caused an im.ediate change in the density, biom.ss and com.osition of vegetation. Although the species present rem.ined sim.lar, their abundances changed significantly im.ediately after the fire, with notable reductions in dom.nant tussock grasses. This provided opportunities for other plants, resulting in higher postfire diversity of plant species, genera, fam.lies and growth form.. In turn, the changes in vegetation after fire affected the com.osition of birds according to their trophic guild. Granivores largely disappeared,generalists were m.stly unaffected, and other guilds showed a m.re com.lex response. As the vegetation recovered, m.st displaced birds returned within approxim.tely one year.

关键词： Burning plant biom.ss Trophic guilds Andes Giant rosette plants

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