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Synthesis,disorder and Ising anisotropy in a new spin liquid candidate PrMgAl_(11)O_(19)

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Materials Futures 2024年第3期3卷 148-156页

作者： Yantao Cao huanpeng Bu Zhendong Fu Jinkui Zhao jason S Gardner Zhongwen Ouyang Zhaoming Tian Zhiwei Li hanjie Guo key Lab for Magnetism and Magnetic Materials of the Ministry of Education Lanzhou UniversityLanzhou 730000People’s Republic of China Songshan Lake Materials Laboratory DongguanGuangdong 523808People’s Republic of China Institute of Physics Chinese Academy of SciencesBeijing 100190People’s Republic of China Materials Science and Technology Division Oak Ridge National LaboratoryOak RidgeTN 37831United States of America School of Physics and Wuhan National high Magnetic Field Center Huazhong University of Science and TechnologyWuhan 430074People’s Republic of China

here we report the successful synthesis of large single crystals of triangular frustrated PrMgAl_(11)O_(19)using the optical floating zone *** crystal x-ray diffraction(XRD)measurements unveiled the presence of quenched disorder within the mirror plane,specifically~7%of Pr ions deviating from the ideal 2d site towards the 6h *** susceptibility measurements revealed an Ising anisotropy with the c-axis being the easy *** a large spin–spin interaction that develops below~10 k and considerable site disorder,the spins do not order or freeze down to at least 50 *** availability of large single crystals offers a distinct opportunity to investigate the exotic magnetic state on a triangular lattice with an easy axis out of the plane.

关键词： spin liquid disorder frustration triangular lattice Ising anisotropy

Dynamics of self-hybridized exciton–polaritons in 2D halide perovskites

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Light(Science & Applications) 2024年第1期13卷 13-22页

作者： Surendra B.Anantharaman jason Lynch Christopher E.Stevens Christopher Munley Chentao Li Jin h.u hao Zhang Andrew Torma Thomas Darlington Francis Coen kevin Li Arka Majumdar PJames Schuck Aditya Mohite hayk harutyunyan Joshua R.hendrickson Deep Jariwala Department of Electrical and Systems Engineering University of PennsylvaniaPhiladelphiaPA19104USA kBR Inc. BeavercreekOH45431USA Air Force Research Laboratory Sensors DirectorateWright-Patterson Air Force BaseOH45433USA Department of Physics University of WashingtonSeattleWA98195USA Department of Physics Emory UniversityAtlantaGA30322USA Department of Chemical and Biomolecular Engineering Rice UniversityHoustonTX77005USA Department of Materials Science and Nanoengineering Rice UniversityHoustonTX77005USA Applied Physics Program Smalley‐Curl InstituteRice UniversityHoustonTX77005USA Department of Mechanical Engineering Columbia UniversityNew YorkNY10027USA Department of Electrical and Computer Engineering University of WashingtonSeattleWA98195USA

Excitons,bound electron–hole pairs,in two-dimensional hybrid organic inorganic perovskites(2D hOIPs)are capable of forming hybrid light-matter states known as exciton-polaritons(E–Ps)when the excitonic medium is confined in an optical *** the case of 2D hOIPs,they can self-hybridize into E–Ps at specific thicknesses of the hOIP crystals that form a resonant optical cavity with the ***,the fundamental properties of these self-hybridized E–Ps in 2D hOIPs,including their role in ultrafast energy and/or charge transfer at interfaces,remain ***,we demonstrate that>0.5µm thick 2D hOIP crystals on Au substrates are capable of supporting multiple-orders of self-hybridized E–P *** E–Ps have high Q factors(>100)and modulate the optical dispersion for the crystal to enhance sub-gap absorption and *** varying excitation energy and ultrafast measurements,we also confirm energy transfer from higher energy E–Ps to lower energy E–***,we also demonstrate that E–Ps are capable of charge transport and transfer at *** findings provide new insights into charge and energy transfer in E–Ps opening new opportunities towards their manipulation for polaritonic devices.

关键词： charge polar excitation

Renewable biomass reinvigorates sustainable water-energy nexus

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Science Bulletin 2024年第16期69卷 2543-2554页

作者： hongxu Chen Jiatao Xu Zhiyong jason Ren hailong Lin Leli Zhang EReaihan Yanhao Yuan Zihan Wang Zhidan Liu Laboratory of Environment-Enhancing Energy(E2E) College of Water Resources and Civil EngineeringChina Agricultural UniversityBeijing 100083China key Laboratory of Agricultural Engineering in Structure and Environment Ministry of Agriculture and Rural AffairsBeijing 100083China Department of Civil and Environmental Engineering Princeton UniversityPrinceton NJ 08544USA Andlinger Center for Energy and the Environment Princeton UniversityPrinceton NJ 08544USA Department of Earth and Environmental Engineering Columbia UniversityNew York NY 10027USA State key Laboratory of Efficient utilization of Agricultural Water Resources Beijing 100083China

The water-energy nexus has garnered worldwide *** dual-functional research aimed at coproducing freshwater and electricity faces significant challenges,including sub-optimal capacities("1+1unctional coordination,high carbon footprints,and large *** water-toelectricity conversions are often compromised owing to functionality separation and erratic ***,we present a sustainable strategy based on renewable biomass that addresses these issues by jointly achieving competitive solar-evaporative desalination and robust clean electricity *** hydrothermally activated basswood,our solar desalination exceeded the 100% efficiency bottleneck even under reduced solar *** simple size-tuning,we achieved a high evaporation rate of 3.56 kg h^(-1)m^(-2)and an efficiency of 149.1%,representing 128%-251% of recent values with.ut sophisticated surface *** incorporating an electron-ion nexus with interfacial Faradaic electron circulation and co-ion-predominated micro-tunnel hydrodynamic flow,we leveraged free energy from evaporation to generate long-term electricity(0.38 W m^(-3)for over 14 d),approximately 322% of peer performance *** inter-functional nexus strengthened dual functionalities and validated general engineering *** presented strategy holds significant promise for global human–society–environment sustainability.

关键词： Biomass Water-energy nexus Solar desalination Clean energy hydrothermal carbonization Sustainable development

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水面下物体作任意运动的兴波阻力

上海交通大学学报 1963年第1期 35-41页

作者：何友声

本文应用流体动力学的經典理論研究了軸对称細长体在水面下作任意运动及出水时的兴波阻力,并根据小波理論和源汇法推导出流場扰动势和兴波阻力的計算公式。研究結果表明所受阻力与整个运动的过程有关。

关键词：兴波阻力速度势

Taking care of volunteers in a stroke trial: a new assisted-management strategy

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Stroke & Vascular Neurology 2016年第3期1卷 108-114页

作者： Amber C Stuart jason J Sico Catherine M Viscoli Ashis h Tayal Silvio E Inzucchi Gary A Ford karen L Furie Robert Cote J David Spence David Tanne Walter N kernan on behalf of the IRIS Trial Investigators Department of Internal Medicine Yale University School of MedicineNew HavenConnecticutUSA Department of Neurology Yale University School of MedicineNew HavenConnecticutUSA Department of Neurology Service Veterans Affairs Connecticut Healthcare SystemWest HavenConnecticutUSA Neuroscience Institute Allegheny Health NetworkPittsburghPennsylvaniaUSA Lewis katz School of Medicine at Temple university PhiladelphiaPennsylvaniaUSA Division of Medical Sciences Oxford UniversityOxfordUK The Warren Alpert Medical School of Brown university ProvidenceRhode IslandUSA Department of Neurology Neurosurgery and MedicineMcGill UniversityMontrealQuebecCanada university of Western Ontario LondonOntarioCanada 10Sheba Medical CenterTel Aviv UniversityTel AvivIsrael 不详

Background and purpose:Providing participants with evidence-based care for secondary prevention is an ethical and scientific priority for trials in stroke *** optimal strategy,however,is *** report the performance of a new approach for delivering preventive care to trial ***:Participants were enrolled in the Insulin Resistance Intervention after Stroke trial,which examined the insulin sensitiser,pioglitazone versus placebo for prevention of stroke and myocardial infarction after ischaemic stroke or transient ischaemic *** care was the responsibility of the participants’personal healthcare providers,but investigators monitored care and provided feedback *** studied achievement of 8 prevention goals at baseline and 3 annual visits,with a focus on 3 priority goals:blood pressurehg,lowdensity lipoprotein(LDL)cholesterolhrombotic ***:The proportion of participants achieving the priority goals was highest for antithrombotic use(96–99%in each year)and similar for blood pressure(66–72%in each year)and LDL(68–70%in each year).All 3 priority goals were achieved by 47–52%of participants in any given ***,only 22%of participants achieved all 3 goals in each ***:A strategy of monitoring care and providing feedback was associated with high average yearly achievement of 3 priority secondary prevention goals,but the majority of trial participants did not persist in being at goal over *** registration number:NCT00091949.

关键词： prevention annually goals

The Effect of Injected Air Bubble Size on the Thermal Performance of a Vertical shell and helical Coiled Tube heat Exchanger

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Energy Engineering 2021年第6期118卷 1595-1609页

作者： Saif S.hasan Ali sh.Baqir hameed B.Mahood Engineering Technical College Al-Furat Al-Awsat Technical UniversityAl-Najaf31001Iraq Department of Chemical and Process Engineering Faculty of Engineering and Physical SciencesUniversity of SurreyGuildfordGU27XHUK

In the present study,the effect of injecting air bubble size on the thermal performance of a vertical counter-current shell and coiled tube heat exchanger is experimentally *** experiments were accomplished in a cylindrical shape heat exchanger with a 50 cm height and 15 cm outer *** coil with 3.939 m equivalent length and 0.6 cm outer diameter was used to carry the hot fluid(water).Four different cold fluid(shell side)flow rates(Q_(s)=2;4;6 and 8 LPM)Þunder laminar flow conditions(316≤Re≤1223),constant hot(coil side)flow rate fluid rates(Q_(h)=1 LPM),four different injected air flow rates(Q_(a)=0:5;1;1:5 and 2 LPM),invariant temperature difference(ΔT=20°C),and constant bubble’s number(1400)were *** demonstrate the effect of bubble size,a sparger with orifice diameters of 0.1,0.8,and 1.5 mm was manufactured and used in the *** overall heat transfer coefficient(u),NTu,effectiveness,and pressure loss were *** experimental results clearly showed that the heat exchanger’s thermal efficiency significantly improved with increasing the shell side flow rate and the injected air flow *** maximum improvement in u,NTu,and effectiveness was 153%,153%,and 68%,*** thermal performance of the heat exchanger was shown to be improved with increasing the bubble *** the latter finding agrees with recent CFD published results,more studies need to be confirmed.

关键词： Sparger smooth helical coil vertical shell heat exchanger injection bubbles

Genome-wide antagonism between 5-hydroxymethylcytosine and DNA methylation in the adult mouse brain

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Frontiers in Biology 2014年第1期9卷 66-74页

作者： Junjie u. GuO keith E. SZuLWACh Yijing Su Yujing LI Bing YAO Zihui Xu Joo heon sh1N Bing XIE Yuan GAO Guo-li MING Peng JIN hongjun SONG Institute for Cell Engineering Johns Hopkins University School of Medicine Baltimore MD 21205 USA The Solomon h. Snyder Department of Neuroscience Johns Hopkins University School of Medicine Baltimore MD 21205 USA Department of Neurology Johns Hopkins University School of Medicine Baltimore MD 21205 USA. Department of human Genetics Emory University School of Medicine 615 Michael Street Atlanta GA 30322 USA Lieber Institute for Brain Development Johns Hopkins University School of Medicine Baltimore MD 21205 USA

Mounting evidence points to critical roles for DNA modifications, including 5-methylcytosine （5mC） and its oxidized forms, in the development, plasticity and disorders of the mammalian nervous system. The novel DNA base 5- hydroxymethylcytosine （5hmC） is known to be capable of initiating passive or active DNA demethylation, but whether and how extensively 5hmC functions in shaping the post-mitotic neuronal DNA methylome is unclear. here we report the genome-wide distribution of 5hmC in dentate granule neurons from adult mouse hippocampus in vivo. 5hmC in the neuronal genome is highly enriched in gene bodies, especially in exons, and correlates with gene expression. Direct genome-wide comparison of 5hmC distribution between embryonic stem cells and neurons reveals extensive differences, reflecting the functional disparity between these two cell types. Importantly, integrative analysis of 5hmC, overall DNA methylation and gene expression profiles of dentate granule neurons in vivo reveals the genome-wide antagonism between these two states of cytosine modifications, supporting a role for 5hmC in shaping the neuronal DNA methylome by promoting active DNA demethylation.

关键词： dentate granule neuron active DNA demethylation TET methylome

Reply to comment by S.h.Büttner on “Evidence for Mesoproterozoic collision,deep burial and rapid exhumation of garbenschiefer in the Namaqua Front,South Africa”

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Geoscience Frontiers 2020年第5期11卷 1895-1899页

作者： Valby van Schijndel David h.Cornell Robert Anczkiewicz Anders Schersten Institute of Geosciences University of Potsdam14476PotsdamGermany Department of Earth Sciences University of GothenburgSE-40530GothenburgSweden Department of Earth Sciences University of StellenboschMatieland7602South Africa Institute of Geological Sciences Polish Academy of SciencesKrakow Research Centre31-002KrakowPoland Lund university Department of GeologySE-22362LundSweden

*** We thank *** for his comments on our paper(van Schijndel et al.,2020),which allow us to clarify our work and the tectonic model we proposed for the eastern margin of the Namaqua Sector of the Namaqua Natal Metamorphic *** kaaien Terrane forms a tectonic transition between the kaapvaal Craton,Rehoboth Province,kheis belt and the Archeachap Terrane of the Namaqua Sector and forms part of a NW-vergent foreland th.ust sequence in the Namaqua Front(*** et al.,2006).The exact tectonic extent of the kaaien Terrane is still unclear and it has recently been proposed to be part of the newly defined kheis Terrane(Van Niekerk and Beukes,2019).

关键词： Province. collision comment

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Protective effect of naringenin on acetic acid-induced ulcerative colitis in rats

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World Journal of Gastroenterology 2013年第34期19卷 5633-5644页

作者： Salim S Al-Rejaie hatem M Abuohashish Maher M Al-Enazi Abdullah h Al-Assaf Mihir Y Parmar Mohammed M Ahmed Department of Pharmacology andToxicology College of PharmacyKing Saud University Department of Medical Laboratory Sciences College of Applied Medical SciencesSalman bin Abdulaziz University Department of Science and Nutrition College of Food and Agricultural SciencesKing Saud University

AIM:To evaluate the ameliorative effect of naringenin(NG)during ulcerative colitis(uC)in ***:Rats were treated with three different doses(25,50 and 100 mg/kg per day)of NG and a single dose of mesalazine(MES,300 mg/kg per day)for seven days prior to ulcerative colitis induction by4%acetic acid(AA).Twenty four h.urs after AA rectal administration,animals were scarified and the colonic tissues were *** mucus content was estimated using Alcian blue dye binding *** colon tissues,levels of total glutathione sulphadryls(T-Gsh),non-protein sulphadryls(NP-sh)and thiobarbituric acid reactive substances(TBARS)were *** activities of the antioxidant enzymes,catalase(CAT)and superoxide dismutase(SOD)were *** of nucleic acids(DNA and RNA)and total protein were also estimated in colon *** levels of tumor necrosis factor-(TNF-),interleukin-1(IL-1),interleukin-6(IL-6),prostaglandin E2(PGE2)and nitric oxide(NO)were *** cross section of colitis tissue the histopathological changes were ***:Colonic mucus content was decreased in AA compared to controls(587.09±65.59 mg/kg vs941.78±68.41 mg/kg,Pkedly reduced T-Gsh(5.25±0.37 nmol/L vs 3.04±0.24 nmol/L,Psh(3.16±0.04 nmol/L vs 2.16±0.30 nmol/L,Pu/mg vs 3.04±0.2 u/mg,Pu/mg vs 1.77±0.18 u/mg,Phile TBARS,TNF-,IL-1,IL-6,PGE2 and NO levels(15.09±3.84nmol/L vs 59.90±16.34 nmol/L,Ph.uC compared controls *** supplementation,significantly and dose dependently increased the colonic mucus *** elevated TBARS levels were significantly decreased(39.35±5.86nmol/L,P<0

关键词： Naringenin ulcerative colitis Inflammatory bowel disease Oxidative stress