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discovery of new MAX-phase-like layered ternary carbide V_(8)P_(6)c:crystal structure,thermal expansion,and elastic properties

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Journal of Materials Science & Technology 2024年第7期174卷 55-62页

作者： H.X.chen L.Sheng Z.L.Zhang X.c.Wen d.L.Yang X.Y.Ye P.Q.dai School of Materials Science and Engineering Fujian University of TechnologyFuzhou 350118China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of ScienceBeijing 100049China Fujian Provincial Key Laboratory of Advanced Materials Processing and Application Fuzhou 350118China State Key Laboratory of Structural chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

due to the laminated structure,MAX phases and MAX-phase-like compounds possess outstanding dam-age tolerance capability with good thermal/electrical conductivity and other charming functional prop-erties,showing a bright future for structural-functional ***,a new MAX-phase-like ternary car-bide V_(8)P_(6)c with layered characteristics was *** to the alternate stacking of hexagonal-arranged M/A/X atom layers in MAX phases,V_(8)P_(6)c has a layered structure formed by a repeated stacking of the slabs consisting of V_(6)c-octahedrons and VP 6-distorted-octahedrons in three-atomic layers *** thermal expansion anisotropy was revealed,with the thermal expansion coefficients(TEcs)along a-axis,c-axis,and the 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 the c-axis was mainly dominated by out-plane V-P bonds be-tween layered *** to the pressure-dependent lattice parameters,the polycrystalline bulk modulus(B_(0)=185(9)GPa)and high compressibility anisotropy factor(B_(a)/B_(c)=1.64)was ***-while,the second-order elastic constants were calculated,and the elastic moduli,E=303 GPa,B=198 GPa,G=122 GPa,andν=0.246,were *** the weak connection between layer slabs by out-plane V1-P bond was revealed by the bond stiffness model,with a bond stiffness close to the M-A bond in MAX ***,good.d.mage tolerance capability was predicted according to Paugh’s ratio(G/B=0.616)and cauchy pressure(P_(a)=0 GPa,P_(c)=-7.5 GPa),even better than those of typical MAX *** discovery of V_(8)P_(6)c provides a new member of MAX-phase-like damage-tolerant ceramic with relatively low density,moderate thermal expansion,and anisotropic compressibility,and the unique lay-ered structure is inspiring for exploring new layered ternary ceramics.

关键词： New ternary carbide MAX phase Thermal expansion Elastic constants Anisotropy

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Experimental measurements of gamma-photon production and estimation of electron/positron production on the PETAL laser facility

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Matter and Radiation at Extremes 2024年第5期9卷 32-47页

作者： F.Brun L.Ribotte G.Boutoux X.davoine P.E.Masson-Laborde Y.Sentoku N.Iwata N.Blanchot d.Batani I.Lantuéjoul L.Lecherbourg B.Rosse c.Rousseaux B.Vauzour d.Raffestin E.d’Humières X.Ribeyre centre Lasers Intenses et Applications UMR 5107Universitéde Bordeaux-CNRS-CEA33405 TalenceFrance cEA DAMCESTAF-33116 Le BarpFrance cEA DAMDIFF-91297 ArpajonFrance cEA LMCEUniversitéParis-Saclay91680 Bruyères-le-ChâtelFrance Institute of Laser Engineering Osaka University2-6 YamadaokaSuitaOsaka 565-0871Japan

This article reports the first measurements of high-energy photons produced with the high-intensity PETawatt Aquitaine Laser(PETAL)*** experiments were performed.d.ring the commissioning of the *** laser had an energy of about 400 J,an intensity of 8×10^(18)W cm^(−2),and a pulse duration of 660 fs(FWHM).It was shot at a 2 mm-thick solid tungsten *** high-energy photons were produced mainly from the bremsstrahlung process for relativistic electrons accelerated inside a plasma generated on the front side of the *** paper reports measurements of electrons,protons and *** electrons up to35 MeV with a few-MeV temperature were record.d.by a spectrometer,called SESAME(SpectreÉlectronS Angulaire MoyenneÉnergie).K-and L-shells were clearly detected by a photon spectrometer called SPEcTIX(Spectromètre Petalàcristal en TransmIssion pour le rayonnnement X).High-energy photons were diagnosed by cRAcc-X(cassette de RAdiographie centre chambre-rayonnement X),a bremsstrahlung *** cannon analysis is strongly dependent on the hypothesis adopted for the spectral *** shapes can exhibit similar reproductions of the experimental *** eliminate dependence on the shape hypothesis and to facilitate analysis of the data,simulations of the interaction were *** model the mechanisms involved,a simulation chain including hydrodynamic,particle-in-cell,and Monte carlo simulations was *** simulations model the preplasma generated at the front of the target by the PETAL laser prepulse,the acceleration of electrons inside the plasma,the generation of MeV-range photons from these electrons,and the response of the detector impacted by the energetic photon *** this work enabled reproduction of the experimental *** high-energy photons produced have a large emission angle and an exponential distribution *** addition to the analysis of the photon spectra,positron production was also ***,if high

关键词： process positron hypothesis

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The association of physical activity duration and intensity on emotional intelligence in 10-13 year-old children

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Sports Medicine and Health Science 2024年第4期6卷 331-337页

作者： Marie c.Gabour Tongjian You Richard Fleming Paul d.McNicholas Philimon N.Gona department of Health Sciences Regis College235 Wellesley StreetWestonMA02493USA department of Exercise and Health Sciences University of Massachusetts Boston100 Morrissey BlvdBostonMA02125USA department of Mathematics&Statistics McMaster UniversityHamiltonOntarioCanada L8S 4L8

Previous studies have shown that Physical Activity(PA)has a positive association with emotional health and intelligence in adolescents but none have focused on the relationship of PA duration and intensity on Emotional Intelligence(EI).The purpose of this study was to cross-sectionally assess the association of PA measures on overall EI and its domains in a cohort of 2029 adolescents aged 10-13 years of age in the National Longitudinal Survey for children and Youth(NLScY)from *** linear regression analysis of EI was adjusted for age,sex,annual household income,and health ***-way analysis of variance(ANOVA)was used to relate PA duration measured in minutes,frequency,and intensity categories with continuous GEI scores and also the corresponding scores for domains of *** mean GEI scores were(28.3±6.6)for 0-30 minute(min)PA duration,(30.0±6.5)for 30 tod(30.1±6.5)for≥121 *** was a statistically significant linear trend across PA duration categories,p?***-hoc pairwise comparison revealed that compared to the referent category(category)was statistically significantly lower GEI than each of the other two PA categories(30-59 min;and 60-120 min),both p-valuesd Health Organization(WHO)guidelines for duration and vigorous intensity were positively associated with the higher overall EI and its domains except for Stress Management.

关键词： Physical activity duration Intensity Emotional Intelligence Adolescents

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Role of lipids in the control of autophagy and primary cilium signaling in neurons

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Neural Regeneration Research 2024年第2期19卷 264-271页

作者： María Paz Hernández-cáceres daniela Pinto-Nuñez Patricia Rivera Paulina Burgos Francisco díaz-castro Alfredo criollo Maria Jose Yañez Eugenia Morselli Instituto de Investigación en ciencias Odontológicas(IcOd) Facultad de OdontologíaUniversidad de ChileSantiagoChile department of Basic Sciences Faculty of Medicine and ScienceUniversidad San SebastiánSantiagoChile Physiology department Faculty of Biological SciencesPontificia Universidad Católica de ChileSantiagoChile Advanced center for chronic diseases(AccdiS) Facultad de Ciencias Químicas y Farmacéuticas&Facultad de MedicinaUniversidad de ChileSantiagoChile Autophagy Research center SantiagoChile

The brain is,after the adipose tissue,the organ with the greatest amount of lipids and.d.versity in their composition in the human *** neurons,lipids are involved in signaling pathways controlling autophagy,a lysosome-dependent catabolic process essential for the maintenance of neuronal homeostasis and the function of the primary cilium,a cellular antenna that acts as a communication hub that transfers extracellular signals into intracellular responses required for neurogenesis and brain development.A crosstalk between primary cilia and autophagy has been established;however,its role in the control of neuronal activity and homeostasis is barely *** this review,we briefly discuss the current knowledge regarding the role of autophagy and the primary cilium in *** we review the recent literature about specific lipid subclasses in the regulation of autophagy,in the control of primary cilium structure and its dependent cellular signaling in physiological and pathological conditions,specifically focusing on neurons,an area of research that could have major implications in neurodevelopment,energy homeostasis,and neurodegeneration.

关键词： autophagic flux cholesterol fatty acids GPcR lysosomal storage diseases neurons NPc1 phosphoinositides primary cilium

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A brief history of the compendium of Physical Activities

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Journal of Sport and Health Science 2024年第1期13卷 3-5页

作者： Barbara E.Ainsworth Stephen d.Herrmann david R.Jacobs Jr. Melicia c.Whitt-Glover catrine Tudor-Locke School of Exercise and Health Shanghai University of SportShanghai 200438China college of Health Solutions Arizona State UniversityPhoenixAZ 85003USA Kansas center for Metabolism and Obesity Research University of Kansas Medical CenterKansas CityKS 66160USA division of Epidemiology and community Health University of MinnesotaMinneapolisMN 55455USA Gramercy Research Group KnightdaleNC 27545USA college of Health and Human Services University of North Carolina at CharlotteCharlotteNC 28223USA

The compendium of Physical Activities(compendium)was developed to address consistent assignment of physical activity(PA)intensity values used in PA epidemiology research of the association between PA and health outcomes.1The known protective effects of PA on incident health outcomes traces to the mid-1900s,with over 50 studies examining coronary heart disease(cHd)as the outcome of interest.

关键词： epidemiology Activities protective

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Polyhydroxyurethanes from Biobased Monomers and cO_(2):A Bridge between Sustainable chemistry and cO_(2) Utilization

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chinese Journal of chemistry 2024年第6期42卷 652-685页

作者： Tharinee Theerathanagorn Tanika Kessaratikoon Hafeez Ur Rehman Valerio d'Elia daniel crespy VISTEc Advanced Laboratory for Environment-Related Inorganic and Organic Syntheses Department of Materials Science and EngineeringVidyasirimedhi Institute of Science and Technology21210Wang ChanRayongThailand department of Materials Science and Engineering Vidyasirimedhi Institute of Science and Technology21210Wang ChanRayongThailand

Polyhydroxyurethanes(PHUs)have received considerable attention in the last decade as potential alternatives to traditional phosgene-based polyurethanes(PUs).The development of suitable 5cc(five membered-ring cyclic carbonate)precursors bearing multiple carbonate moieties(multi-5ccs)is a key requisite for preparing PHUs by polyaddition reaction with bis-or *** sustainable PHUs from cO_(2)-based five-membered cyclic carbonates(5ccs)obtained from biobased epoxides is a valuable strategy to bridge cO_(2) utilization and the upcycling of renewable *** this context,while many multi-5cc monomers reported in the literature are oil-based,recent efforts have led to the development of a large variety of multifunctional 5ccs that are produced by the combination of cO_(2) and renewable resources such as fatty acids and vegetable oils,lignin,terpenes,and *** this work,recent crucial advances(2019—2023)on PHUs prepared from bis-and multi-5ccs produced from cO_(2) and(partially/potentially)biobased substrates are reviewed with respect to their synthesis,thermal and mechanical properties,and their recent,emerging applications.

关键词： cO_(2) conversion Polyhydroxyurethanes cyclic carbonates Biobased compounds Fatty acids Functional polymers Monomers Renewable resources

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Temperature and structure measurements of heavy-ion-heated.d.amond using in situ X-ray diagnostics

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Matter and Radiation at Extremes 2024年第4期9卷 80-89页

作者： J.Lutgert P.Hesselbach M.Schorner V.Bagnoud R.Belikov P.drechsel B.Heuser O.SHumphries P.Katrik B.Lindqvist c.Qu R.Redmer d.Riley G.Schaumann S.Schumacher A.Tauschwitz d.Varentsov K.Weyrich X.Yu B.Zielbauer Zs.Major P.Neumayer d.Kraus Institut fur Physik Universitat RostockAlbert-Einstein-Str.2318059 RostockGermany GSI Helmholtzzentrum fur Schwerionenforschung Planckstr.164291 DarmstadtGermany Institut für Angewandte Physik Goethe-Universität Frankfurt am MainMax-von-Laue-Str.160438 Frankfurt am MainGermany Institut fur Geowissenschaften Goethe-Universitat Frankfurt am MainAltenhoferallee 160438 Frankfurt am MainGermany Helmholtz-Zentrum dresden-Rossendorf Bautzner Landstr.40001328 DresdenGermany European XFEL GmbH Holzkoppel 422869 SchenefeldGermany centre for Plasma Physics School of Mathematics and PhysicsQueen’s University BelfastUniversity RoadBelfast BT71NNUnited Kingdom Institut für Kernphysik Technische Universität DarmstadtSchlossgartenstr.964289 DarmstadtGermany State Key Laboratory of Nuclear Physics and Technology Institute of Heavy Ion PhysicsPeking UniversityBeijing 100871China Helmholtz Institut Jena Frobelstieg 307743 JenaGermany

We present in situ measurements of spectrally resolved X-ray scattering and X-ray diffraction from monocrystalline diamond samples heatedwith an intense pulse of heavy *** this way,we determine the samples’heating dynamics and their microscopic and macroscopic structuralintegrity over a timespan of several *** the ratio of elastic to inelastic scattering with state-of-the-art density functionaltheory molecular dynamics simulations allows the inference of average temperatures around 1300 K,in agreement with predictions fromstopping power *** simultaneous diffraction measurements show no hints of any volumetric graphitization of the material,butdo indicate the onset of fracture in the diamond *** experiments pave the way for future studies at the Facility for Antiproton andIon Research,where a substantially increased intensity of the heavy ion beam will be available.

关键词： heated intense structure

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Uncovering Microstructure-Property Relationship in Ni-Alloyed Fe-Mn-Al-c Low-density Steel Treated by Hot-Rolling and Air-cooling Process

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Acta Metallurgica Sinica(English Letters) 2024年第4期37卷 713-725页

作者： Xiaoliang Jia Guhui Gao Xiaolu Gui chun Feng R.d.K.Misra Bingzhe Bai School of Mechanical Electronicand Control EngineeringBeijing Jiaotong UniversityBeijing100044China cNPc Tubular Goods Research Institute Xi’an710077China Laboratory for Excellence in Advanced Steel Research University of Texas at El PasoEl PasoTX79968-0521USA School of Material Science and Engineering Key Laboratory of Advanced Materials of Ministry of EducationTsinghua UniversityBeijing100084China

This paper focuses on the relationship between the microstructure and tensile properties of Fe-Mn-Al-c low-density high-strength steel processes by hot-rolling and air-cooling process. The microstructure analysis reveals that the combination of hot-rolling and air-cooling results in the formation of heterogeneous structures comprising different-sized γ and B_(2) phases in the low-density steel with the addition of nickel (Ni). The addition of Ni promotes the formation of the B_(2) phase and induces the pinning of B_(2) phase particles at the γ grain boundaries. This pinning effect effectively hinders the growth of the γ grains, leading to grain refinement. The tensile test results demonstrate that LdS-5Ni (low-density steel, LdS) exhibits excellent high strength and.d.ctility combination, e.g., a tensile strength of 1535 MPa, yield strength of 1482 MPa, and elongation of 23.3%. These remarkable mechanical properties are primarily attributed to the combined strengthening contributions of grain refinement and.d.plex nano-sized second-phase precipitation hardening.

关键词： Low-density steel Microstructure B_(2)phase κ-carbide Tensile properties

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Ammonia and greenhouse gas distribution in a dairy barn during warm periods

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Frontiers of Agricultural Science and Engineering 2024年第3期11卷 428-441页

作者： Provvidenza Rita d’URSO claudia ARcIdIAcONO Giovanni cAScONE department of Agriculture Food and EnvironmentUniversity of CataniaVia S.Sofia n.100Catania 95123Italy

This research aimed to quantify concentrations of ammonia(NH3),carbon dioxide(cO_(2))and methane(cH_(4)),estimate emissions,and analyze the factors influencing them during warm periods in an open dairy barn equipped with two cooling systems in a Mediterranean climate *** distribution within the barn was observed to vary both vertically and horizontally,with the highest gas concentrations observed in the central area of the ***_(3),cH_(4)and cO_(2)ranged in 1.7–7.4,7–18,560–724μg·g^(–1),*** ventilation through openings and the operation of cooling systems induced changes in indoor microclimate conditions,influencing cow behavior and,consequently,gas *** concentrations were the highest at air velocities below 0.5 m·s^(–1).The highest concentration of NH_(3)was observed when the temperature-humidity index(THI)was>72 and≤78;and cO_(2)and cH_(4)concentrations were the highest with THI≥72 and.d.creased with THI≤***_(3)concentrations when barn management includ.d.three daily milkings were higher than those measured when barn management was based on two daily milkings,and lower for cH_(4)and cO_(2).NH_(3)and cH_(4)emissions were the highest during barn cleaning,while the lowest NH_(3)emissions occurred.d.ring activity of the cows(i.e.,feeding,walking).

关键词： Ammonia greenhouse gas environmental monitoring cows’behavior barn management housing system climatic parameters

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Post-operative protein supplementation following orthopaedic surgery: A systematic review

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Sports Medicine and Health Science 2024年第1期6卷 16-24页

作者： Andrew George Brendan M.Holderread Bradley S.Lambert Joshua d.Harris Patrick c.Mcculloch Houston Methodist Orthopedics and Sports Medicine 6445 Main Street Suite 2300HoustonTX77030USA Houston Methodist Orthopedic Biomechanics Research Laboratory 6670 Bertner AveHoustonTX77030USA

decreased mechanical loading after orthopaedic surgery predisposes patients to develop muscle *** purpose of this review was to assess whether the evidence supports oral protein supplementation can help decrease postoperative muscle atrophy and/or improve patient outcomes following orthopaedic surgery.A systematic review was conducted according to the Preferred Reporting Items for Systematic Reviews and MetaAnalysis(PRISMA).PubMed(MEdLINE),Embase,Scopus,and Web of Science were searched for randomized controlled trials that assessed protein or amino acid supplementation in patients undergoing orthopaedic *** investigators independently conducted the search using relevant Boolean *** outcomes includ.d.functional or physiologic measures of muscle atrophy or *** studies including 611 patients(224 males,387 females)were *** studies evaluated protein supplementation after AcL reconstruction(AcLR),3 after total hip arthroplasty(THA),5 after total knee arthroplasty(TKA),and 3 after surgical treatment of hip *** supplementation showed beneficial effects across all types of *** primary benefit was a decrease in muscle atrophy compared to placebo as measured by muscle cross sectional *** authors also demonstrated improved functional measures and quicker achievement of rehabilitation *** supplementation has beneficial effects on mitigating muscle atrophy in the postoperative period following AcLR,THA,TKA,and surgical treatment of hip *** effects often correlate with improved functional measures and quicker achievement of rehabilitation *** research is need.d.to evaluate long-term effects of protein supplementation and to establish standardized population-specific regimens that maximize treatment efficacy in the postoperative period.

关键词： Orthopaedic surgery Protein supplementation Systematic review Muscle atrophy

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