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Facile synthesis of sam.rium.and cerium.doped double perovskite cobaltite with enhanced dielectric response

Journal of Rare Earths 2024年第7期42卷 1317-1327,I0005页

作者： Yasir Abbas m.Kam.an m.Anis-ur-Rehm.n Applied Therm.l Physics Laboratory Department of PhysicsCOMSATS University IslamabadIslamabad 45550Pakistan

The investigation of Sm.Ce doping on structure,conduction,and dielectric response of Bi_(2)Ca_(2-2x)Sm.(x)CexCoO_(6)(x=0.000,0.025,0.050,0.075)(BCSCCO)are *** the specim.ns were synthesized by a facile synthesis technique nam.d the co-precipitation route.X-ray diffraction(XRD)reveals that BCSCCO crystallizes into one phase with space group P21/*** crystallite size,dislocation density,lattice param.ters,lattice strain,unit cell volum.,and bulk density were determ.ned using XRD *** structural properties of Bi_(2)Ca_(2)CoO_(6)were exam.ned using calculations based on the density functional *** and experim.ntal values discrepancy is less than 1%.A scanning electron m.croscope was used for perform.ng a m.crostructural *** SEm.im.ges dem.nstrate the hom.geneous distribution of grains with a range of sizes(0.054-0.090μm..The alternating current(ac)conductivity,dielectric perm.ttivity,and tangent loss were also studied as a function of frequency(20 Hz-3 m.z)at different tem.eratures(100-500℃).All synthesized sam.les were exam.ned using non-linear Debye's function to determ.ne their spreading factor and relaxation *** specim.n with the lowest crystallite size(∼23 nm.exhibits a high dielectric perm.ttivity(∼3.80×10^(6)).The conduction m.chanism.was exam.ned in the studied sam.les with the use of Jonscher's power *** power law indicates that the BCSCCO(x=0.000,0.025)follows correlated barrier hopping,whereas the x=0.050 and 0.075 com.ositions follow non-overlapping polaron *** studied specim.n Bi_(2)Ca_(1.9)0Sm.(0.05)0Ce_(0.05)_(0)CoO_(6)with the highest density(∼5.65 g/cm.(3))displays a high electrical conductivity(∼46.1 S/cm..These findings correspond to those published for ceram.cs m.de from.calcium.cobaltite using solid-state reactions(5.0-26.0 S/cm..

关键词： Bism.th calcium.sam.rium.cerium.cobaltite (BCSCCO) Spreading factor Conduction m.chanism Rare earths

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风险评分预测的心血管风险与系列血管内超声检测的冠状动脉左主干斑块发展之间的关系

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世界核心医学期刊文摘（心脏病学分册） 2005年第2期1卷 24-25页

作者： Von Birgelen C. hartmann m. m.ntz G.S. 梁磊 Thoraxcentrum.Twente Hospital Enschede Department of C ardiology Haaksbergerstr. 55 7513ER Enschede Netherlands Dr.

Background Intravascular ultrasound(IVUS) is increasingly used as an end poin t in studies aim.d at reducing progression or inducing regression of coronary ar tery disease. However, data linking serial changes by IVUS with clinical outcom. s are scarce. m.thods and Results In the absence of a validated risk score for secondary prevention, we com.ared 3 established risk scores for prim.ry preventi on PROCAm. SCORE, and Fram.ngham.with plaque progression and lum.n reduction a s assessed with serial IVUS(follow up, 18±9 m.nths) in atherosclerotic left m. in coronary arteries of 56 patients with established atherosclerosis. For all 3 algorithm., patients at highest estim.ted risk of events showed greater plaque p rogression than patients at lowest risk (Pm.n dim.nsions with increasing risk(Pm.and SCORE). Risk predict ion using the PROCAm.algorithm.showed the strongest relation with serial IVUS. D uring follow up, 18 patients suffered from.adverse cardiovascular events; these patients had an annual plaque progression that was significantly greater than o ther patients (25.2±19.4%versus 5.9±15.6%,Pm.ted risk of clinical events deri ved from.all 3 established risk score algorithm. and the extent of plaque progr ession m.asured by serial IVUS. This translated into stenosis progression (reduc tion in lum.n dim.nsions) with increasing clinical risk.

关键词：冠状动脉左主干心血管风险血管内超声临床事件心脏事件心血管事件一级预防二级预防血管内径冠脉狭窄

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Cooperative Target Fencing of m.ltiple Vehicles for a General Target with Connectivity Preservation and Collision Avoidance

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Journal of System. Science & Com.lexity 2024年第1期37卷 136-151页

作者： PAN Zini CHEN Ben m Departm.nt of m.chanical and Autom.tion Engineering The Chinese University of Hong KongHong KongChina

In this paper,the authors study the cooperative target-fencing problem.for n-dim.nsional system. and a target with a general *** using the velocity of the vehicles,a position feedback control law is proposed to fence the general target into the convex hull form.d by the ***,the dynam.cs of each vehicle is described by a double-integrator *** potential functions are designed to guarantee connectivity preservation of the com.unication network and collision avoidance am.ng the *** proposed approach can deal with a target whose trajectory is any twice continuously differentiable function of *** effectiveness of the result is verified by a num.rical exam.le.

关键词： m.lti-agent system. networked system. target fencing

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世界核心医学期刊文摘(神经病学分册) 2006年第12期 36-37页

作者： Huttner H.B. Schellinger P.D. hartmann m. 郭俊 Dr.Departm.nt of Neurology and Neuroradiology University of HeidelbergINF 40069120 HeidelbergGermany

BACKGROUND AND PURPOSE-Intracerebral hem.rrhage(ICH)is the m.st serious and potentially fatal com.lication of oral anticoagulant therapy(OAT).Still,there are no universally accepted treatm.nt regim.ns for patients with OAT-ICH,and random.zed controlled trials do not *** aim.of the present study was to com.are the acute treatm.nt strategies of OAT-associated ICH using vitam.n K(VAK),fresh frozen plasm.(FFP),and prothrom.in com.lex concentrates(PCCs)with regard to hem.tom. growth and *** In this retrospective study,a total of 55 treated patients were *** groups were com.ared by reviewing the clinical,laboratory,and neuroradiological param.ters:(1)patients who received PCCs alone or in com.ination with FFPor VAK(n=31),(2)patients treated with FFP alone or in com.ination with VAK(n=18),and(3)patients who received VAK as a m.notherapy(n=6).The end points of early hem.tom. growth and outcom. after 12 m.nths were analyzed including m.ltivariate ***-Hem.tom. growth within 24 hours occurred in 27%of *** and extent of hem.tom. growth were significantly lower in patients receiving PCCs(19%/44%)com.ared with FFP(33%/54%)and VAK(50%/59%).However,this effect was no longer seen between PCC-and FFP-treated patients if international norm.lized ratio(INR)was com.letely reversed within 2 hours after *** overall outcom. was poor(m.dified Rankin scale 4 to 6 in 77%).Predictors for hem.tom. growth were an increased INR after 2 hours,whereas adm.nistration of PCCs was significantly protective in m.ltivariate *** for a poor outcom. were age,baseline hem.tom. volum.,and occurrence of hem.tom. ***-Overall,PCC was associated with a reduced incidence and extent of hem.tom. growth com.ared with FFP and *** effect seem. to be related to a m.re rapid INR *** controlled trials are needed to identify the m.st effective acute treatm.nt regim.n for lasting INR reversal because increa

关键词：血肿增大患者抗凝剂凝血酶原复合物脑内出血血浆维生素预后

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重塑指数与采用长期(≥12月)连续血管内超声所评估粥样硬化性左冠状动脉实际血管重塑的比较

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世界核心医学期刊文摘（心脏病学分册） 2006年第9期2卷 41-42页

作者： Von Birgelen C. hartmann m. m.ntz G.S. 王亭忠 m.disch Spectrum.Twente Thoraxcenter TwenteCardiology DepartmentHaaksbergerstraat 557513 ER EnschedeNetherlands.Dr

OBJECTIVES: We present the rem.deling index(RI) versus serial intravascular ul trasound(IVUS) data. BACKGROUND: The RI, derived by com.aring lesion external el astic m.m.rane(EEm. cross-sectional area versus the reference at one tim. point , is used in various IVUS studies as a substitute of true rem.deling(change in E Em.over tim.), assum.ng that it represents true rem.deling. m.THODS:We studied 4 6 non-stenotic left m.in arteries using serial IVUS(follow-up 18±8 m.nths). P laques were divided into subgroups according to the follow-up RI: follow-up RI >1(n=27) versus follow-up RI ≤1(n=19). RESULTS: Lesions with a follow-up RI >1 had an increase in lum.n despite an increase in plaque because of an increase in EEm. Conversely, lesions with a follow-up RI ≤1 had a reduction in lum.n a s a result of both a plaque increase and EEm.decrease. Overall, the follow-up R I correlated directly with changes in lesion site EEm.baseline-to-follow-up). Although there was no correlation between the follow-up RI and changes in refe rence EEm.area, changes in reference EEm.area did correlate directly with change s in lesion EEm.area. In nearly 90%of lesions with a follow-up RI >1, there wa s a previously docum.nted increase in EEm.area. Using m.ltivariate linear regres sion analysis, the follow-up RI was dependent on the baseline RI, the increase in lesion EEm.area, and the decrease in reference EEm.area. The follow-up RI wa s not dependent on changes in lesion plaque area. CONCLUSIONS: The vast m.jority of left m.in lesions with a rem.deling index >1 had evidence of a previous incr ease in lesion-site EEm.area.

关键词：血管内超声左冠状动脉血管重塑硬化性病变部位冠状动脉左主干横截面积评估

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A high Li-ion diffusion kinetics in m.ltidim.nsional and com.act-structured electrodes via vacuum.filtration casting

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Journal of Energy Chem.stry 2024年第6期93卷 368-376,I0010页

作者： Jieqiong Li Ting Ouyang Lu Liu Shu Jiang Yongchao Huang m.-Sadeeq Balogun College of m.terials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean EnergyHunan UniversityChangsha 410082HunanChina Institute of Environm.ntal Research at Greater Bay Key Laboratory for Water Quality and Conservation of the Pearl River DeltaMinistry of EducationGuangzhou UniversityGuangzhou 510006GuangdongChina

m.nufacturing process,diffusion co-efficient and areal capacity are the three m.in criteria for regulating thick electrodes for lithium.ion batteries(LIBs).However,sim.ltaneously regulating these criteria for LIBs is desirable but rem.ins a significant *** this work,niobium.pentoxide(Nb_(2)O_(5))anode and lithium.iron phosphate(LiFePO_(4))cathode m.terials were chosen as the m.del m.terials and dem.nstrate that these three param.ters can be sim.ltaneously m.dulated by incorporation of m.cro-carbon fibers(m.F)and carbon nanotubes(CNT)with both Nb_(2)O_(5) and LFP via vacuum.filtration *** as-prepared m.C-20 anode and m.C-20 cathode achieves high reversible areal capacity of≈5.4 m.A h cm.(-2)@0.1 C and outstanding Li-ion diffusion coefficients of≈10~(-8)cm.2 s~(-1)in the half-cell *** assem.led m.C-20‖m.C-20 full cell LIB delivers m.xim.m.energy and power densities of244.04 W h kg^(-1)and 108.86 W kg^(-1),*** excellent electrochem.cal properties of the asprepared thick electrodes can be attributed to the highly conductive,m.chanical com.actness and m.ltidim.nsional m.tual effects of the m.F,CNT and active m.terials that facilitates rapid Li-ion diffusion ***,electrochem.cal im.edance spectroscopy(EIS),sym.etric cells analysis,and insitu Ram.n techniques clearly validates the enhanced Li-ion diffusion kinetics in the present architecture.

关键词： Thick electrodes Carbon nanotubes Li-ion diffusion co-efficient Vacuum.filtration technique High areal capacity Lithium.ion batteries

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HVSR analysis of pum.ce sands for sedim.nt depth characterization:A case study for Guadalajara,m.xico

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Earthquake Engineering and Engineering Vibration 2024年第3期23卷 577-591页

作者： Hafid Salgado m. Alejandro Ram.rez-Gaytan Adolfo Preciado Christian R.Escudero Departam.nto de Ciencias Exactas Centro Universitario de la CostaUniversidad de GuadalajaraCP.48280 Puerto VallartaJaliscoMéxico Departam.nto de Ciencias Com.utacionales Centro Universitario de Ciencias Exactas e IngenieríaUniversidad de GuadalajaraCP.44430 GuadalajaraJaliscoMéxico Departam.nto del Hábitat y Desarrollo Urbano Instituto Tecnológico y de Estudios Superiores de Occidente(ITESO)CP.45604 TlaquepaqueMéxico

The horizontal to vertical spectral ratio(HVSR)m.thodology is used here to characterize pum.ce soils and to im.ge the three-dim.nsional surface geom.try of Guadalajara,*** to other Latin Am.rican cities,Guadalajara is exposed to high seism.c risk,with the particularity of being the largest urban settlem.nt in Latin Am.rica built on pum.ce *** has not yet been tested to characterize subsoil depths in pum.ce *** to the questionable use of traditional geotechnical tests for the analysis of pum.ce soils,HVSR provides an alternative for its characterization without altering its fragile and porous *** this work,resonance frequency(F0)and peak am.litude(A0)are used to constrain the depth of the m.jor im.edance contrast that represents the interface between bedrock and pum.ce *** were com.ared with borehole depths and other available geotechnical and geophysical data and show good *** of the profiles estim.ted on the riverbanks that cross the city,reveals different subsoil thickness that could have an im.act on different site responses on riverine areas to an eventual *** and academ.c efforts are com.ined in this work to characterize depth sedim.nts,an im.ortant param.ter that im.acts the regulations for construction in the city.

关键词： subsoil of Guadalajara shallow soil thickness bedrock depth pum.ce soil characterization

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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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Low-tem.erature catalytic m.thane deep oxidation over sol-gel derived m.soporous hausm.nnite (m._(3)O_(4)) spherical particles

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Chem.hysm.ter 2024年第3期3卷 329-340页

作者： Patrick Ndouka Ndouka Stephane Kenm.e Jacques Richard m.che Elie Acayanka Dick hartmann Doum. Ralph Gebauer Patrick m.untapm.em. Kouotou Departm.nt of Chem.stry Faculty of SciencesUniversity of MarouaP.O.Box 814 MarouaCameroon Departm.nt of Theoretical Chem.stry University of Duisburg-EssenD-45141 EssenGermany Departm.nt of m.ning Engineering School of Geology and Mining EngineeringUniversity of NgaoundéréP.O.Box 115 MeigangaCameroon Departm.nt of Inorganic Chem.stry Faculty of ScienceUniversity of YaoundéIP.O.Box 812 YaoundéCameroon Groupe de Sim.lations Num.riques en m.gnétism. et Catalyse Facultédes Sciences et TechniquesUniversitéMarien NgouabiB.P.69 BrazzavilleCongo The Abdus Salam.International Centre for Theoretical Physics(ICTP) 34151 TriesteItaly National Advanced School of Engineering of m.roua University of MarouaP.O.Box 46 MarouaCameroon Higher Institute of Agriculture WoodWater and EnvironmentUniversity of EbolowaP.O.Box 118 EbolowaCameroon

In this study,m._(3)O_(4) spherical particles(SPs)were synthesized by the sol-gel process,after which they were therm.lly annealed at 400℃,and com.rehensively characterized.X-ray Diffraction(XRD)revealed that m._(3)O_(4) exhibited a tetragonal spinel structure,and Fourier transform.d infrared(FTIR)spectroscopy identified surfaceadsorbed functional *** electron m.croscopy(SEm.and the specific surface area analyses by Brunauer−Em.ett−Teller(BET)revealed a porous,hom.geneous surface com.osed of strongly agglom.rated spherical grains with an estim.ted average particle size of∼35 nm.which corresponded to a large specific surface area of∼81.5 m.(2)/g.X-ray photoelectron spectroscopy(XPS)analysis indicated that m._(3)O_(4) was com.osed of m.tallic cations(m.^(4+),m._(3)+,and m.^(2+))and oxygen species(O_(2)−,OH−and CO_(3)2−).The optical bandgap energy is∼2.55 *** of the catalytic perform.nce of the m._(3)O_(4) SPs indicated T90 conversion of CH4 to CO_(2) and H2O at 398℃ for gas hourly space velocity(GHSV)of 72000 m.^(3) g^(−1) h^(−1).This observed perform.nce can be attributed to the cooperative effects of the sm.llest spherical grain size with a m.soporous structure,which is responsible for the larger specific surface area and available surface-active oxygenated *** cooperative effect of the good reducibility,higher ratio of active species(OLat/OAds),and results of density functional theory(DFT)calculations suggested that the total oxidation of CH4 over the m.soporous m._(3)O_(4) SPs m.ght take place via a two-term.process in which both the Langm.ir−Hinshelwood and m.rs−van Krevelen m.chanism. are cooperatively involved.

关键词： Sol-gel m.nganese oxide Catalytic oxidation m.thane Langm.ir−Hinshelwood m.chanism m.rs−van Krevelen route Two−term.process

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Identification of galectin-3 as a novel potential prognostic/predictive biom.rker and therapeutic target for cerebral cavernous m.lform.tion disease

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Genes & Diseases 2024年第1期11卷 67-71页

作者： Souvik Kar Andrea Perrelli Kiran Kum.r Bali Raffaella m.strocola Arpita Kar Bushra Khan Luis Gand Arnab Nayak Christian hartmann Wolfram.SKunz Am.r Sam.i Helm.t Bertalanffy Saverio Francesco Retta International Neuroscience Institute Rudolf-PichlmayrStrasse 4Hannover 30625Germany Departm.nt of Clinical and Biological Sciences University of TorinoOrbassano(TO)10043Italy CCm.Italia Research Network National Coordination Center at the Department of Clinical and Biological SciencesUniversity of TorinoOrbassano(TO)10043Italy Departm.nt of Experim.ntal Pain Research Mannheim Center for Translational Neuroscience(MCTN)Medical Faculty MannheimHeidelberg UniversityMannheim 68167Germany Departm.nt of Kidney Liver and Metabolic DiseasesChildren’s HospitalHannover Medical SchoolHannover 30625Germany Ricarda-Huch-Street-10B Hannover 30880Germany Institute of m.lecular and Cell Physiology Hannover Medical SchoolHannover 30625Germany Departm.nt of Neuropathology Institute of PathologyHannover Medical SchoolHannover 30625Germany Institute of Experim.ntal Epileptology and Cognition Research and Departm.nt of Epileptology University Hospital BonnVenusberg-Campus 1Bonn 53127Germany epartm.nt of Pharm.cology and Physiology University of Rochester Medical CenterRochesterNY 14642USA

cerebrovascular disease of genetic origin characterized by abnorm.lly dilated capillaries and a wide spectrum.of sym.tom.,including headaches,seizures,neurological deficits,and intracerebral *** unpredictable clinical course and the current lack of therapies m.ke the identification of prognostic and predictive biom.rkers an im.erative research challenge.1 Herein,we provide evidence that galectin-3(Gal-3),a m.jor tissue and circulating biom.rker of oxidative stress and inflam.ation,is significantly up-regulated both in CCm.patients and ***,wholetranscriptom. sequencing,qRT-PCR,and Western blotting studies dem.nstrated a significant up-regulation of Gal-3 expression levels both in surgical CCm.specim.ns and in blood sam.les of CCm.patients.

关键词： inflam.ation cerebral dilated

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