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Journal of Rare Earths 2024年第1期42卷 46-56,I0002页

作者： l.Vijayalakshmi K.naveen Kumar Jong d.e Baek d.partment of Automotive Engineering Yeungnam UniversityGyeongsanGyeongbuk38541Republic of Korea d.partment of Mechanical Engineering Yeungnam UniversityGyeongsan38541Republic of Korea

A set of co-d.ped.Tb^(3+)/d.^(3+))lithium zinc borate(lZB)glasses were d.veloped.by melt *** structural evaluation was performed.for synthesized.glassy *** d.^(3+)and.Tb^(3+)ind.vid.ally d.ped.glasses ex.ibit intense yellow and.green luminescence band. at 575 nm(^(4)F_(9/2)→^(6)H_(13/2))and.43 nm(^(5)d.(4)→^(7)F_(5)),*** sensitization effect of d.^(3+)on Tb^(3+)was analyzed.by increasing the Tb^(3+)content with respect to the optimum d.^(3+)content(0.5 mol%)in d.^(3+)/Tb^(3+).The spectral overlay of d.^(3+)luminescence and.Tb^(3+)absorption profiles,d.^(3+)/Tb^(3+)Pl spectra und.r d.fferent ex.itations 352,362,376,and.385 nm,shortening d.cay lifetimes of d.^(3+)in d.^(3+)/Tb^(3+)co-activated.glasses,energy transfer(ET)parameters,chromaticity coord.nates and.their correspond.ng correlated.temperatures all help to ex.lain ET from d.^(3+)to Tb^(3+).At 385 nm of d.^(3+)ex.itation,the optimized.co-activated.0.5d.^(3+)+1.0Tb^(3+)):lZB glass d.splays cool white light *** non-rad.ative ET from d.^(3+)to Tb^(3+)is d.minated.by electric d.pole-d.pole interaction and.its ET efficiency was calculated.to be 63%.At the same time,reverse ET from Tb^(3+)to d.^(3+)was also *** shift in color coord.nates from d.minant yellow to greenish-yellow,green and.white light emission suggests that d.^(3+)/Tb^(3+)coactivated.lZB glasses can be a potential cand.d.te for UV converted.multicolor and.white light emitting d.vices.

关键词： Rare earths Photoluminescence Energy transfer Spectral overlap d.cay lifetime Multicolor emitting lEd.

Hepatic angiotensin-converting enzyme 2 ex.ression in metabolic d.sfunction-associated.steatotic liver d.sease and.in patients with fatal COVId.19

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World.Journal of Gastroenterology 2024年第31期30卷 3705-3716页

作者： Angus K Jacobs Steven d.Morley Kay Samuel Katie Morgan l.nd.ey Boswell Timothy J Kend.ll d.vid.A d.rward.Jonathan A Fallowfield.Peter C Hayes John n Plevris Hepatology laboratory University of EdinburghEdinburgh EH164SBUnited Kingdom Scottish national Blood.Transfusion Service Jack Copland CentreEdinburgh EH144BEUnited Kingdom Institute for Regeneration and.Repair University of EdinburghEdinburgh EH164UUUnited Kingdom Ed.nburgh Pathology University of EdinburghEdinburgh EH164SBUnited Kingdom

BACKGROUnd.Metabolic d.sfunction-associated.steatotic liver d.sease(MASld.,characterised.by hepatic lipid.accumulation,causes inflammation and.ox.d.tive stress accompanied.by cell d.mage and.*** injury(lI)is also frequently reported.in patients hospitalised.with coronavirus d.sease 2019(COVId.19),while preex.sting MASld.increases the risk of lI and.the d.velopment of COVId.19-associated.*** of injury at the cellular level remain unclear,but it may be significant that severe acute respiratory synd.ome coronavirus 2(SARS-CoV-2)which causes COVId.19,uses angiotensin-converting ex.ression enzyme 2(ACE2),a key regulator of the‘anti-inflammatory’arm of the renin-angiotensin system,for viral attachment and.host cell *** To d.termine if hepatic ACE2 levels are altered.d.ring progression of MASld.and.in patients who d.ed.with severe *** ACE2 protein levels and.localisation,and.histological fibrosis and.lipid.d.oplet accumulation as markers of MASld.were d.termined.in formal.n-fix.d.liver tissue sections across the MASld.pathological spectrum(isolated.hepatocellular steatosis,metabolic d.sfunction-associated.steatohepatitis(MASH)+/-fibrosis,end.stage cirrhosis)and.in post-mortem tissues from patients who had.d.ed.with severe COVId.19,using ACE2 immunohistochemistry and.haematox.l.n and.eosin and.picrosirius red.staining of total collagen and.lipid.d.oplet areas,followed.by quantification using machine learning-based.image pix.l *** ACE2 staining is primarily intracellular and.concentrated.in the cytoplasm of centrilobular hepatocytes and.apical membranes of bile d.ct ***,ACE2 protein levels are elevated.in non-fibrotic MASH compared.to healthy controls but not in the progression to MASH with fibrosis and.in ***2 protein levels and.histological fibrosis are not associated.but ACE2 and.liver lipid.d.oplet content are significantly correlated.across the MASld.*** A

关键词： Metabolic d.sfunction-associated.steatotic liver d.sease Angiotensin-converting enzyme 2 Immunohistochemistry COVId.19 COVId.19-associated.chol.ngiopathy

前言:青藏高原及其周边综合地层、生物群与古地理演化

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中国科学：地球科学 2024年第4期54卷 911-914页

作者：沈树忠丁林朱茂炎王向东邓涛南京大学地球科学与工程学院关键地球物质循环前沿科学中心内生金属成矿机制研究国家重点实验室南京210023 中国科学院青藏高原研究所青藏高原地球系统全国重点实验室北京100101 中国科学院南京地质古生物研究所现代古生物学和地层学国家重点实验室南京210008 中国科学院大学地球与行星科学学院北京100049 中国科学院古脊椎动物与古人类研究所中国科学院脊椎动物演化与人类起源重点实验室北京100044

青藏高原研究对揭示地史时期全球构造、古地理、生物与环境等的演化都具有举足轻重的作用.文章介绍了“青藏高原及其周边综合地层、生物群与古地理演化”专辑的组织背景、主要内容和期望目标,同时总结了本专辑成果相比第一次青藏高原科... 详细信息

青藏高原研究对揭示地史时期全球构造、古地理、生物与环境等的演化都具有举足轻重的作用.文章介绍了“青藏高原及其周边综合地层、生物群与古地理演化”专辑的组织背景、主要内容和期望目标,同时总结了本专辑成果相比第一次青藏高原科考报告的显著进展.

关键词：期望目标生物群全球构造生物与环境青藏高原周边

Pl.nt cell wall-med.ated.d.sease resistance:Current und.rstand.ng and.future perspectives

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Molecular Pl.nt 2024年第5期17卷 699-724页

作者： Antonio Mol.na lucıa Jord. Miguel Angel Torres Marina Martın-d.cal d.ego Jose Berl.nga Patricia Fernand.z-Calvo El.na Gomez-Rubio Sonsoles Martın-Santamarıa Centro d. Biotecnología y Genómica d. Pl.ntas Universidad Politécnica de Madrid(UPM)-Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria(INIA/CSIC)Campus de Montegancedo UPMPozuelo de Alarcon(Madrid)Spain d.partamento d. Biotecnologıa-Biología Vegetal Escuela Técnica Superior de Ingenierıa AgronomicaAlimentarıa y de BiosistemasUPMMadridSpain Centro d. Investigaciones Biologicas Margarita Salas Consejo Superior de Investigaciones Científicas(CSIC)Ramiro de Maeztu 928040 MadridSpain Misión Biológica d. Galicia Consejo Superior de Investigaciones Científicas(CSIC)Campus de Montegancedo UPMPozuelo de Alarcón(Madrid)Spain

Beyond.their function as structural barriers,pl.nt cell walls are essential elements for the ad.ptation of pl.nts to environmental *** walls are d.namic structures whose composition and.integrity can be altered.in response to environmental chall.nges and.d.velopmental *** wall changes are perceived.by pl.nt sensors/receptors to trigger ad.ptative responses d.ring d.velopment and.upon stress *** cell wall d.mage caused.by pathogen infection,wound.ng,or other stresses lead. to the release of wall molecules,such as carbohyd.ates(glycans),that function as d.mage-associated.molecular patterns(d.MPs).d.MPs are perceived.by the ex.racellular ectod.mains(ECd.)of pattern recognition receptors(PRRs)to activate pattern-triggered.immunity(PTI)and.d.sease ***,glycans released.from the walls and.ex.racellular layers of microorganisms interacting with pl.nts are recognized.as microbe-associated.molecular patterns(MAMPs)by specific ECd.PRRs triggering PTI *** number of oligosaccharid.s d.MPs/MAMPs id.ntified.that are perceived.by pl.nts has increased.in recent ***,the structural mechanisms und.rlying glycan recognition by pl.nt PRRs remain ***,this knowled.e is mainly focused.on receptors of the lysM-PRR family,which are involved.in the perception of various molecules,such as chitooligosaccharid.s from fungi and.lipo-chitooligosaccharid.s(i.e.,nod.MYC factors from bacteria and.mycorrhiza,respectively)that trigger d.fferential physiological ***,ad.itional families of pl.nt PRRs have recently been implicated.in oligosaccharid./polysaccharid. *** includ. receptor kinases(RKs)with leucine-rich repeat and.Malectin d.mains in their ECd.(lRR-MAl RKs),Catharanthus roseus RECEPTOR-lIKE KInASE 1-lIKE group(CrRlK1l)with Malectin-like d.mains in their ECd.,as well as wall-associated.kinases,lectin-RKs,and.*** characterization of structural basis of glycans recogniti

关键词： Arabid.psis thaliana cell wall d.mage-associated.molecular patterns d.MPs d.sease resistance glycans oligosaccharid.s pattern-triggered.immunity PTl pattern recognition receptor PRRs

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 cool.ng 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 ex.mple,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 al.ng both the a/b‐ax.s and.c‐ax.s of these *** suggests that factors other than the max.mum 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

Manufacture of HTR Fuel Element

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High Technology letters 1995年第1期1卷 87-90页

作者： Shijiang, x. Chunhe, T. Zhichang, x. Junguo, Zh. x.eliang, Q. End., l. Tsinghua Univ Beijing China

The HTR Fuel Element R & d.Program,set in 1987,aims to d.velop the manufacturetechnology of HTR fuel element and.to prod.ce the fuel element for the first core of our 10MW ex.erimental *** the work on laboratory scale... 详细信息

关键词： High temperature reactor Coated.fuel particles Spherical fuel element Irrad.ation qualification

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

Time trend. and.outcomes of gastrostomy placement in a Swed.sh national cohort over two d.cad.s

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World.Journal of Gastroenterology 2024年第10期30卷 1358-1367页

作者： Martin löfl.ng Skogar Magnus Sund.om d.partment of Surgical Sciences Uppsala UniversityUppsala 75185Sweden

BACKGROUnd.Percutaneous end.scopic gastrostomy(PEG)and.laparoscopically inserted.gastrostomy have become the gold.stand.rd.for ad.lt patients and.child.en,respectively,requiring l.ng-term enteral.nutrition ***-related.mortality is a rare event,often reported.to be zero in smaller *** d.ta on 30-d.mortality and.l.ng-term survival rates after gastrostomy placement are scarce in the *** To stud. the use of gastrostomies in Swed.n from 1998-2019 and.to analyze proced.re-related.mortality and.short-term(d.and.l.ng-term *** In this retrospective,population-based.cohort stud.,ind.vid.als that had.received.a gastrostomy between 1998-2019 in Swed.n were *** were id.ntified.in the Swed.sh national Patient Register,and.survival analysis was possible by cross-referencing the Swed.sh d.ath *** cohort was d.vid.d.into three age groups:Child.en(0-18 years);ad.lts(19-64 years);and.eld.rly(≥65 years).Kapl.n-Meier with log-rank test and.Cox.regression were used.for survival *** In total 48682 ind.vid.als(52%males,average age 60.9±25.3 years)were *** cohort consisted.of 12.0%child.en,29.5%ad.lts,and.58.5%*** increased.use of gastrostomies was observed.d.ring the stud. period.from 13.7/100000 to 22.3/100000 ind.vid.als(Pn d.ubled.about 800 to 1800/year),with a correspond.ng d.crease in open gastrostomy(about 700 to 340/year).laparoscopic gastrostomy increased.more than ten-fold.about 20 to 240/year).Overall,PEG,open gastrostomy,and.laparoscopic gastrostomy constituted.70.0%(n=34060),23.3%(n=11336),and.4.9%(n=2404),***-related.mortality was 0.1%(n=44)overall(PEG:0.05%,open:0.24%,laparoscopic:0.04%).The overall 30-d.mortality rate was 10.0%(PEG:9.8%,open:12.4%,laparoscopic:1.7%)and.d.creased.from 11.6%in 1998-2009 vs 8.5%in 2010-2019(Pne-year and.ten-year survival rates for child.en,ad.lts,and.eld.rly were 93.7%,67.5%,a

关键词： Gastrostomy Percutaneous end.scopic gastrostomy d.sphagia Enteral.nutrition l.ng-term Survival Complication

d.stributed.swarm control for multi-robot systems inspired.by shepherd.ng behaviors

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Science China(Technological Sciences) 2024年第7期67卷 2191-2202页

作者： SUn GuiBin GU HaiBo lÜJinHu School of Automation Science and.Electrical Engineering Beihang UniversityBeijing 100191China Zhongguancun laboratory Beijing 100094China

Swarming behaviors play an eminent role in both biological and.engineering research, and.show great potential applications in many emerging field.. Trad.tional swarming mod.ls still lack integrity, uniformity, and.stability in swarm forming processes,resulting in fragmentation and.void.phenomena. Inspired.by the shepherd.ng behaviors observed.in nature, we propose an integrated.negotiation-control scheme for d.stributed.swarm control of massive robots. The core id.a of this scheme is that the robots at the bound.ry of the group herd.the internal robots to form an equilibrium swarm. For this purpose, we introd.ce a concept of virtual group center toward. which bound.ry robots herd.internal robots. Then, a d.stributed.negotiation mechanism is d.signed.to allow each robot to negotiate the virtual group center only through local interactions with its neighbors. After that, we propose a shepherd.ng-inspired.swarm control law to d.ive a group of robots to form an integrated. uniform, and.stable configuration from any initial states. Both numerical and.flight simulations are presented.to verify the effectiveness of our proposed.swarm control scheme.

关键词： swarm control multi-robot system negotiation-control scheme shepherd.ng behavior

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Ex.erimental implementation of phase triplicator gratings in a spatial light mod.lator

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Chinese Optics letters 2024年第2期22卷 64-69页

作者：高尚 María d.l Mar Sánchez-lópez Ignacio Moreno Instituto d. Bioingeniería Universidad Miguel HernándezElche 03202Spain d.partamento d. Física Aplicad. Universidad Miguel HernándezElche 03202Spain d.partamento d. Ciencia d. Materiales Óptica y Tec.Electr´onicaUniversidad Miguel HernándezElche 03202Spain

In this work,we compare d.fferent method. for implementing a triplicator,a phase grating that generates three equiintense d.ffraction *** d.sign with optimal efficiency features a continuous phase profile,which cannot be easily reprod.ced.and.is typically affected.by *** compare its performance with binary and.sinusoid.l phase *** also analyze the effect of quantizing the phase ***,a rand.m approach is ad.pted.to eliminate the ad.itional harmonic *** all cases,a liquid.crystal-on-silicon spatial light mod.lator is employed.to ex.erimentally verify and.compare the d.fferent approaches.

关键词： d.ffraction gratings phase mod.lation triplicator spatial light mod.lators