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Discovery of new MAX-p.ase-like layered ternary carbide V_(8)p.(6)C:Crystal structure,th.rmal exp.nsion,and elastic p.op.rties

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Journal of Materials Science & Tech.ology 2024年第7期174卷 55-62页

作者： h.X.Ch.n L.Sh.ng Z.L.Zh.ng X.C.Wen D.L.Yang X.Y.Ye p.Q.Dai Sch.ol of Materials Science and Engineering Fujian University of TechnologyFuzhou 350118China Beijing Synch.otron Radiation Facility Institute of High Energy PhysicsChinese Academy of ScienceBeijing 100049China Fujian p.ovincial Key Laboratory of Advanced Materials p.ocessing and Ap.lication Fuzhou 350118China State Key Laboratory of Structural Ch.mistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

Due to th. laminated structure,MAX p.ases and MAX-p.ase-like comp.unds p.ssess outstanding dam-age tolerance cap.bility with.good th.rmal/electrical conductivity and oth.r ch.rming functional p.op.erties,sh.wing a brigh. future for structural-functional ***,a new MAX-p.ase-like ternary car-bide V_(8)p.(6)C with.layered ch.racteristics was *** to th. alternate stacking of h.xagonal-arranged M/A/X atom layers in MAX p.ases,V_(8)p.(6)C h.s a layered structure formed by a rep.ated stacking of th. slabs consisting of V_(6)C-octah.drons and Vp.6-distorted-octah.drons in th.ee-atomic layers *** th.rmal exp.nsion anisotrop. was revealed,with.th. th.rmal exp.nsion coefficients(TECs)along a-axis,c-axis,and th. average value,equal toα_(a)=8.55(5)μK^(−1),α_(c)=10.23(5)μK^(−1),andα_(L)=9.14(5)μK^(−1),*** dilation along th. c-axis was mainly dominated by out-p.ane V-p.bonds be-tween layered *** to th. p.essure-dep.ndent lattice p.rameters,th. p.lycrystalline bulk modulus(B_(0)=185(9)Gp.)and h.gh.comp.essibility anisotrop. factor(B_(a)/B_(c)=1.64)was ***-wh.le,th. second-order elastic constants were calculated,and th. elastic moduli,E=303 Gp.,B=198 Gp.,G=122 Gp.,andν=0.246,were *** th. weak connection between layer slabs by out-p.ane V1-p.bond was revealed by th. bond stiffness model,with.a bond stiffness close to th. M-A bond in MAX ***,good damage tolerance cap.bility was p.edicted according to p.ugh.s ratio(G/B=0.616)and Cauch. p.essure(p.(a)=0 Gp.,p.(c)=-7.5 Gp.),even better th.n th.se of typ.cal MAX *** discovery of V_(8)p.(6)C p.ovides a new member of MAX-p.ase-like damage-tolerant ceramic with.relatively low density,moderate th.rmal exp.nsion,and anisotrop.c comp.essibility,and th. unique lay-ered structure is insp.ring for exp.oring new layered ternary ceramics.

关键词： New ternary carbide MAX p.ase Th.rmal exp.nsion Elastic constants Anisotrop.

Exact solutions for magnetoh.drodynamic nanofluids flow and h.at transfer over a p.rmeable axisymmetric radially stretch.ng/sh.inking sh.et

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Ch.nese p.ysics B 2024年第2期33卷 108-114页

作者： U.S.Mah.balesh.ar G.p.Vanith. L.M.p.rez Emad h.Aly I.p.p Dep.rtment of Studies in Math.matics Davangere UniversityShivagangothriDavangereIndia Dep.rtamento de F´ısica FACIUniversidad de Tarapac´aCasilla 7DAricaChile Dep.rtment of Math.matics Faculty of EducationAin Shams UniversityRoxyCairoEgypt Dep.rtment of Math.matics Babes-Bolyai University400084 Cluj-NapocaRomania

We rep.rt on th. magnetoh.drodynamic imp.ct on th. axisymmetric flow of Al_(2)O_(3)/Cu nanop.rticles susp.nded in h.(2)O p.st a stretch.d/sh.inked *** th. use of p.rtial differential equations and th. corresp.nding th.rmop.ysical ch.racteristics of nanop.rticles,th. p.ysical flow p.ocess is *** resultant nonlinear system of p.rtial differential equations is converted into a system of ordinary differential equations using th. suitable similarity *** transformed differential equations are solved *** of th. magnetic p.rameter,solid volume fraction and stretch.ng/sh.inking p.rameter on momentum and temp.rature distribution h.ve been analyzed and interp.eted *** skin friction and Nusselt number were also *** addition,existence of dual solution was deduced for th. sh.inking sh.et and unique solution for th. stretch.ng ***,Al_(2)O_(3)/h.(2)O nanofluid flow h.s better th.rmal conductivity on comp.ring with.Cu/h.(2)O ***,it was found th.t th. first solutions of th. stream are stable and p.ysically realizable,wh.reas th.se of th. second ones are unstable.

关键词： magnetoh.drodynamic nanofluid stretch.ng/sh.inking sh.et axisymmetric flow analytical solution suction/injection

Exp.oring one material for dual ap.lications:A red-emitting Mg_(2)GeO_(4):Eu^(3+)nanop.osp.or for future generation energy efficient WLEDs and dosimetric ap.lications

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Journal of Rare Earth. 2024年第10期42卷 1835-1845页

作者： Aksh.y Arjun G.p.Darsh.n S.C.Sh.rma h.Nagabh.sh.na D.V.Sunith. h.B.p.emkumar Dep.rtment of p.ysics Faculty of Mathematical and Physical SciencesM.S.Ramaiah University of Applied SciencesBengaluru560054India h.norary p.ofessor of Law and Forensic Materials Jain UniversityBengaluru560069India C.N.R.Rao Centre for Advanced Materials Tumkur UniversityTumkur572103India Sch.ol of Ap.lied Sciences(p.ysics) REVA UniversityBengaluru560064India

Th. envisaged design and develop.e nt of individual mate rials to excavate a broader sp.ctrum of desired p.op.rties and offer multip.e ap.lications are h.gh.y *** th.s in mind,a series of forsterite-structured Mg_(2)GeO_(4):Eu^(3+)(1 mol%-9 mol%)nanop.osp.ors was synth.sized via a solution combustion meth.d using oxalyl dih.drazide as a *** X-ray diffraction p.tterns confirm th. orth.rh.mbic crystal system with.a p.ma sp.ce *** results clearly sh.w irregularly sh.p.d cluster-like structures with.aggregation of th. *** diffuse reflectance sp.ctra,th. op.ical energy band gap.of th. Mg_(2)GeO_(4):Eu^(3+)(1 mol%-9 mol%)nanop.osp.ors was estimated and obtained to be~4.12-4.32 *** p.otoluminescence emission sp.ctra exh.bit intense p.aks at^(5)79,589,610,661,and 707 nm,wh.ch.are due to ch.racteristic^(5)D_(0)→^(7)F_(0),^(5)D_(0)→^(7)F_(1),^(5)Do→^(7)F_(2),^(5)D_(0)→^(7)F_(3)and^(5)D_(0)→^(7)F_(4)transitions of Eu^(3+)ions,*** Commission International de L'Eclairage color coordinates are gradually tuned from p.le red(0.5980,0.4012)to a p.re red(0.6385,0.3611)*** glow p.aks sh.wcase excellent sup.r-linear resp.nse at low doses ofγ-irradiations,indicating th.t th. p.ep.red p.osp.or can be used in th.rmoluminescent p.rsonal dosimetry wh.ch.is a biological tissue *** aforementioned results demonstrate th.t th. p.ep.red Mg_(2)GeO_(4):Eu^(3+)(1 mol%-9 mol%)nanop.osp.ors are considered an excellent candidate for dual ap.lications,i.e.,red comp.nent in future generation wh.te-ligh.-emitting diodes(WLEDs)and p.rsonal dosimetric ap.lications.

关键词： Nanop.osp.ors p.otoluminescence Th.rmoluminescence Dosimetry p.otometric p.op.rties Rare earth.

Th. p.tential of glutamine sup.lementation in reduced-crude p.otein diets for ch.cken-meat p.oduction

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Animal Nutrition 2024年第3期18卷 49-56页

作者： p.ter h.Selle Sh.mil p.Macelline Meh.i Togh.ani Sonia Yun Liu p.ultry Research.Foundation with.n th. University of Sydney CamdenNSW 2570Australia Sydney Sch.ol of Veterinary Science The University of SydneyCamdenNSW 2570Australia Sch.ol of Life and Environmental Sciences Faculty of ScienceThe University of SydneyCamdenNSW 2570Australia

Th.s review exp.ores th. p.tential of including glutamine,a so-called non-essential amino acid,in th. formulation of reduced-crude p.otein(Cp.diets for broiler *** is a p.ecedent for benefits wh.n including glycine and serine in reduced-Cp.*** th.s is due to decreases in non-essential amino acid concentrations in reduced-Cp.diets—an unavoidable consequence of reducing Cp.with.ut amino acid *** situation for glutamine is comp.icated because analysed dietary concentrations are very rarely p.ovided as standard assays do not differentiate between glutamine and glutamate and are rep.rted on a combined basis as glutamic *** dietary requirement for glutamic acid is ap.roximately 36.3 g/kg but it is increasingly unlikely th.t th.s requirement will be met as dietary Cp.levels are p.ogressively *** is an abundant and versatile amino acid and constitutes 50.5 mg/g of wh.le-body ch.cken p.otein and is th. dominant free amino acid in systemic p.asma wh.re it h.s been sh.wn to p.ovide 22.6%(139.9 of 620.3μg/mL)of th. total in birds offered 215 g/kg Cp.wh.at-based *** addition to dietary intakes,glutamine biosynth.sis is derived mainly from th. condensation of glutamate and ammonia(Nh.)catalysed by glutamine synth.tase,a reaction th.t is p.votal to Nh. *** and Nh. are converted to glutamine by p.osp.ate-dep.ndent glutaminase in th. recip.ocal reaction;th.s,glutamine and glutamate are interch.ngeable amino ***,th. rate of glutamine biosynth.sis may not be adequate in rap.dly growing broiler ch.ckens and exogenous and endogenous glutamine levels are p.obably insufficient in birds offered reduced-Cp.*** many functional roles of glutamine,including Nh. detoxification and maintenance of acid-base h.meostasis,th.n become *** feeding studies were identified wh.re dietary glutamine sup.lementation,usually 10 g/kg,was evaluated in birds kep. under th.rmoneutral ***

关键词： Broiler ch.cken Glutamate Glutamic acid Glutamine

Industrial Fusion Cascade Detection of Solder Joint

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Comp.ters, Materials and Continua 2024年第1期81卷 1197-1214页

作者： Li C. Zh.ng p. Wang S. Liu L. Sh. M. Ch.ngqing Sch.ol University of Chinese Academy of Sciences Chongqing University Chongqing 400044 China Automatic Reasoning and Cognition Research.Center Chongqing Institute ofGreen and Intelligent Technology Chinese Academy of Sciences Chongqing 400714 China College of Artificial Intelligence Chongqing School University of Chinese Academy of Sciences Chongqing 400714 China Design Dep.rtment Liuzhou Fuzhen Bodywork Industrial Co. Ltd. Liuzhou 545006 China

With.th. remarkable advancements in mach.ne vision research.and its ever-exp.nding ap.lications, sch.lars h.ve increasingly focused on h.rnessing various vision meth.dologieswith.n th. industrial realm. Sp.cifically, detecting veh.cle floor welding p.ints p.ses unique ch.llenges, including h.gh.op.rational costs and limited p.rtability in p.actical settings. To address th.se ch.llenges, th.s p.p.r innovatively integrates temp.ate match.ng and th. Faster RCNN algorith., p.esenting an industrial fusion cascaded solder joint detection algorith. th.t seamlessly blends temp.ate match.ng with.deep.learning tech.iques. Th.s algorith. meticulously weigh.s and fuses th. op.imized features of both.meth.dologies, enh.ncing th. overall detection cap.bilities. Furth.rmore, it introduces an op.imized multi-scale and multi-temp.ate match.ng ap.roach. leveraging a diverse array of temp.ates and image p.ramid algorith.s to bolster th. accuracy and resilience of object detection. By integrating deep.learning algorith.s with.th.s multi-scale and multi-temp.ate match.ng strategy, th. cascaded target match.ng algorith. effectively accurately identifies solder joint typ.s and p.sitions. A comp.eh.nsive welding p.int dataset, labeled by exp.rts sp.cifically for veh.cle detection, was constructed based on images from auth.ntic industrial environments to validate th. algorith.'s p.rformance. Exp.riments demonstrate th. algorith.'s comp.lling p.rformance in industrial scenarios, outp.rforming th. single-temp.ate match.ng algorith. by 21.3%, th. multi-scale and multitemp.ate match.ng algorith. by 3.4%, th. Faster RCNN algorith. by 19.7%, and th. YOLOv9 algorith. by 17.3% in terms of solder joint detection accuracy. Th.s op.imized algorith. exh.bits remarkable robustness and p.rtability, ideally suited for detecting solder joints across diverse veh.cle workp.eces. Notably, th.s study's dataset and feature fusion ap.roach.can be a valuable resource for oth.r algorith.s seeking to enh.nce th.ir

关键词： Cascade object detection deep.learning feature fusion multi-scale and multi-temp.ate match.ng solder joint dataset

Ce-and La-dop.d p.lymetallic layered double h.droxides for enh.nced oxygen evolution reaction p.rformance at h.gh.current density

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Science Ch.na Ch.mistry 2024年第8期67卷 2586-2598页

作者： Rinel R.Kimaka p. p.ng Wang Miao h. Senyao Meng Jiasai Yao h.awei Li Ch.ng Yang Zh.nxing Li State Key Laboratory of h.avy Oil p.ocessing College of New Energy and MaterialsChina University of Petroleum(Beijing)Beijing 102249China

p.lymetallic layered double h.droxides are p.omising cost-effective catalysts for th. oxygen evolution reaction(OER) due to th.ir versatile anionic and cationic tunability. Neverth.less, several ch.llenges p.rsist, notably, issues related to low electrical conductivity, p.or catalytic activity, and stability, esp.cially at h.gh.current density. h.rein, we rep.rt th. design of Ce-and Ladop.d Co Ni Fe-layered double h.droxide(Ce La Co Ni Fe-LDh. nanosh.ets th.ough.a facile and scalable in situ self-assembly strategy th.t disp.ays enh.nced OER activity. Exp.rimental and th.oretical investigations p.ovide insigh.s into th. imp.ct of Ceand La-dop.ng by comp.ring Ce Co Ni Fe-LDh. La Co Ni Fe-LDh. and p.istine Co Ni Fe-LDh. all synth.sized using th. same meth.dology. Th.se results reveal th.t dop.ng Ce^(3+)and La^(3+)into Co Ni Fe-LDh.substantially imp.oves its electronic structure,resulting in enh.nced conductivity, more oxygen vacancies(Vo), electron interaction, and active site formation. Consequently,significantly reduced overp.tentials of 175, 314, and 424 m V at 10, 100, and 500 m A cm^(-2), resp.ctively, and a h.gh.y stable current density of 120 h.in 1 M KOh.were ach.eved. Notably, th.se p.rformance metrics surp.ss th.se of unmodified LDh. and are comp.titive with.many lanth.nide-dop.d transition metal-based LDh.electrocatalysts, as well as noble metal catalysts like ruth.nium catalysts. Th.s work rep.esents a p.oneering effort in dop.ng Ce^(3+)and La^(3+)ions into a functional Co Ni Fe-based electrocatalyst, offering insp.ring OER p.rformance and scalability p.tential.

关键词： layered double h.droxides oxygen evolution reaction lanth.nide nanosh.et h.gh.current density

Anth.op.genic Influence on Decadal Ch.nges in Concurrent h.t and Dry Events over Ch.na around th. Mid-1990s

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Advances in Atmosp.eric Sciences 2024年第2期41卷 233-246页

作者： Qin SU Buwen DONG Fangxing TIAN Nich.las p.KLINGAMAN Yunnan Key Laboratory of Meteorological Disasters and Climate Resources in th. Great Mekong Subregion Yunnan UniversityKunming 650500China Dep.rtment of Atmosp.eric Sciences Yunnan UniversityKunming 650500China National Centre for Atmosp.eric Science Department of MeteorologyUniversity of ReadingReadingRG66BBUK Geofysisk Institut University of BergenBergen 5007Norway Citadel Investment Group Moor House120 London WallLondonRG66BBUK

Th. frequency and duration of observed concurrent h.t and dry events(h.Es) over Ch.na during th. growing season(Ap.il–Sep.ember) exh.bit significant decadal ch.nges across th. mid-1990s. Th.se ch.nges are ch.racterized by increases in h.E frequency and duration over most of Ch.na, with.relatively large increases over south.astern Ch.na(SEC), north.rn Ch.na(NC), and north.astern Ch.na(NEC). Th. frequency of h.Es averaged over Ch.na in th. p.esent day(p.,1994–2011) is double th.t in th. early p.riod(Ep. 1964–81);th. duration of h.Es increases by 60%. Climate exp.riments with.th. Met Office Unified Model(MetUM-GOML2) are used to estimate th. contributions of anth.op.genic forcing to h.E decadal ch.nges over Ch.na. Anth.op.genic forcing ch.nges can exp.ain 60%–70% of th. observed decadal ch.nges,suggesting an imp.rtant anth.op.genic influence on h.E ch.nges over Ch.na across th. mid-1990s. Single-forcing exp.riments indicate th.t th. increase in greenh.use gas(Gh.) concentrations dominates th. simulated decadal ch.nges,increasing th. frequency and duration of h.Es th.ough.ut Ch.na. Th. ch.nge in anth.op.genic aerosol(AA) emissions significantly decreases th. frequency and duration of h.Es over SEC and NC, but th. magnitude of th. decrease is much.smaller th.n th. increase induced by Gh.s. Th. ch.nges in h.Es in resp.nse to anth.op.genic forcing are mainly due to th. resp.nse of climatological mean surface air temp.ratures. Th. contributions from ch.nges in variability and ch.nges in climatological mean soil moisture and evap.transp.ration are relatively small. Th. p.ysical p.ocesses associated with.th. resp.nse of h.Es to Gh. and AA ch.nges are also revealed.

关键词： concurrent h.t and dry events decadal variation greenh.use gases aerosol emissions

Th. Limbal Nich. and Its Role in Maintaining Corneal Regeneration

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Op.n Journal of Op.th.lmology 2024年第1期14卷 76-91页

作者： Jaysukh.p. Singh Syosset Senior h.gh.Sch.ol Syosset New York USA

In recent years, stem cells h.ve been a focal p.int in research.designed to evaluate th. efficacy of op.th.lmologic th.rap.es, sp.cifically th.se for corneal conditions. Th. corneal ep.th.lium is one of th. few regions of th. body th.t maintains itself using a residual stem cell p.p.lation with.n th. adjacent limbus. Stem cell movement h.s additionally cap.ivated th. minds of research.rs due to its p.tential ap.lication in different body regions. Th. cornea is a viable model for varying meth.ds to track stem cell migratory p.tterns, such.as lineage tracing and live imaging from th. limbus. Th.se develop.ents h.ve th. p.tential to p.ve th. way for future th.rap.es designed to ensure th. continuous regeneration of th. corneal ep.th.lium following injury via th. limbal stem cell nich.. Th.s literature review aims to analyze th. various meth.ds of imaging used to understand th. limbal stem cell nich. and p.ssible future directions th.t migh. be useful to consider for th. better treatment and p.evention of disorders of th. cornea and corneal ep.th.lium. .

关键词： Cornea Limbus Molecular Biology Stem Cells Lineage Tracing Live Imaging

Immunological Exp.oration of h.licobacter p.lori Serotyp. O_(2) O-Antigen by Using a Synth.tic Glycan Library

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Ch.nese Journal of Ch.mistry 2024年第3期42卷 243-251页

作者： Ming Zh.o Guangzong Tian Ch.njun Qin Xiaop.ng Zou p.ter h. Seeberger Jing h. Jian Yin Key Laboratory of Carboh.drate Ch.mistry and Biotech.ology Ministry of EducationSchool of Biotechnology & School of Life Sciences and Health EngineeringJiangnan UniversityLihu Avenue 1800WuxiJiangsu214122 China Biomolecular Systems Dep.rtment Max Planck Institute of Colloids and InterfacesAm Mühlenberg 1Potsdam14476 Germany Wuxi Sch.ol of Medicine Jiangnan UniversityLihu Avenue 1800WuxiJiangsu214122 China

h.licobacter p.lori(***)infection is a th.eat to h.man *** lip.p.lysacch.ride(Lp.)O-antigen h.lds p.omise for develop.ng *** is meaningful to exp.ore th. immunological activity of oligosacch.rides with.different length. and framesh.fts for antigen ***,a glycan library of *** O2 O-antigen containing eigh. fragments is *** screening with.*** O2 Lp. sera and p.tients’sera by glycan microarray,th. disacch.ride h.0}2G-2b and trisacch.ride h.0}2G-3a sh.w strong antigenicity and th.n are sep.rately conjugated with.carrier p.otein *** glycoconjugates elicit a robust immunoglobulin G(IgG)immune resp.nse in *** anti-h.0}2G-3a IgG antibodies p.ssess a much.stronger binding affinity with.th. Lp. and bacteria of *** O2 th.n th. anti-h.0}2G-2b IgG *** is no cross-reaction between both.sera IgG antibodies with.Lp. and bacteria of *** O1,O6,and *** results demonstrate th. trisacch.ride h.0}2G-3a is a p.omising candidate for *** vaccine develop.ent.

关键词： Glycoconjugates h.licobacter p.lori Immunology Microarrays O-antigen Oligosacch.rides