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chinese Physics B 2024年第6期33卷 405-411页

作者：张化远 Kazuhei Wakiya Mitsuteru Nakamura Masahito Yoshizawa Yoshiki Nakanish graduate School of Science and Engineering Iwate UniversityMorioka 020-8551Japan

We performed ultrasonic measurements on a quaternary cubic compound PrRu_(2)In_(2)Zn_(18) to explore the ground state properties derived from non-Kramers Γ_(3) doublet of Pr^(3+).PrRu_(2)In_(2)Zn_(18) is a quaternary derivative of the ternary compound PrRu_(2)Zn_(20) that exhibits a structural phase transition at T_S=138 *** PrRu_(2)In_(2)Zn_(18),the Zn atoms at the 16c site in PrRu_(2)Zn_(20) are selectively replaced by In atoms.A monotonic increase was observed in the temperature dependence of elastic constants c_L=(c_(11)+2c_(12)+4c_(44))/3 and c_(T)=(c_(11)-c_(12)+c_(44))/3 in the temperature range around T_(S) to which an elastic softening was observed in(c_(11)-c_(12))/2 for PrRu_(2)Zn_(20).The disappearance of the softening indicates that the structural transition in PrRu_(2)Zn_(20) is suppressed by the substitution of Zn ions by In ones with a larger ionic ***,the c_(T) of PrRu_(2)In_(2)Zn_(18) exhibits a precursor curie-type elastic softening toward low temperatures being responsible for the non-Kramers Γ_(3) ground *** discuss the ground state and the evolution of the elastic properties of the different single-crystal samples of PrRu_(2)In_(2)Zn_(18) grown under different conditions.

关键词： ultrasonic measurements non-Kramers doublet structural phase transition crystalline electric field effect

Oxygens matter in the bilayer nickelate superconductor

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Science china(Physics,Mechanics & Astronomy) 2024年第10期67卷 177-178页

作者： Kazuhiko Kuroki Department of Physics Graduate School of ScienceOsaka UniversityOsaka 560-0043Japan

The recent discovery of high T_(c) superconductivity under pressure in a bilayer Ruddlesden-Popper-type nickelate La_(3)Ni_(2)O_(7)[1] has attracted great interest both experimentally and ***,following this discovery,superconductivity in a trilayer nickelate La_(4)Ni_(3)O_(10) has also been discovered[2,3].These findings have confirmed the arrival of the nickel age of superconductivity[4],kicked off by the discovery of superconductivity in the thin films of infinite layer nickelates[5].

关键词： superconductivity nickel superconductor

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Novel Perovskite Oxide Hybrid Nanofibers Embedded with Nanocatalysts for Highly Efficient and Durable Electrodes in Direct cO_(2) Electrolysis

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Nano-Micro Letters 2024年第5期16卷 214-230页

作者： Akromjon Akhmadjonov Kyung Taek Bae Kang Taek Lee Department of Mechanical Engineering KAISTDaejeon 34141Republic of Korea KAIST graduate School of Green Growth and Sustainability Daejeon 34141Republic of Korea

The unique characteristics of nanofibers in rational electrode design enable effec-tive utilization and maximizing material properties for achieving highly efficient and sustainable cO_(2) reduction reactions( cO_(2)RRs)in solid oxide elec-trolysis cells(SOEcs).However,practical appli-cation of nanofiber-based electrodes faces chal-lenges in establishing sufficient interfacial contact and adhesion with the dense *** tackle this challenge,a novel hybrid nanofiber electrode,La_(0.6)Sr_(0.4)co_(0.15)Fe_(0.8)Pd_(0.05)O_(3-δ)(H-LScFP),is developed by strategically incorporating low aspect ratio crushed LScFP nanofibers into the excess porous interspace of a high aspect ratio LScFP nanofiber framework synthesized via electrospinning *** consecutive treatment in 100% H_(2) and cO_(2) at 700°c,LScFP nanofibers form a perovskite phase with in situ exsolved co metal nanocatalysts and a high concentration of oxygen species on the surface,enhancing cO_(2) *** SOEc with the H-LScFP electrode yielded an outstanding current density of 2.2 A cm^(-2) in cO_(2) at 800°c and 1.5 V,setting a new benchmark among reported nanofiber-based *** twinning of the H-LScFP reveals improved contact adhesion and increased reaction sites for cO_(2)*** present work demonstrates a highly catalytically active and robust nanofiber-based fuel electrode with a hybrid structure,paving the way for further advancements and nanofiber applications in cO_(2)-SOEcs.

关键词： Nanofibers Fuel electrodes Digital twinning cO_(2)reduction reaction Solid oxide electrolysis cells

Liquefaction and post-liquefaction behaviors of sands affected by immersion-induced degradation of crushed mudstone

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第5期16卷 1799-1812页

作者： Tadao Enomoto graduate School of Science and Engineering Ibaraki University4-12-1Naka-narusawa-choHitachiIbaraki316-8511Japan

A series of undrained triaxial tests was conducted to investigate the effect of crushed mudstone with the immersion-induced degradation on the liquefaction and post-liquefaction properties,and the undrained shearing behavior without precedent cyclic-loading histories of sands containing crushed *** tested materials with a main particle diameter of 2-0.85 mm were prepared by mixing sands and crushed mudstone to reach the prescribed mudstone content defined by dry mass ranging from 0% to 50%.The mixtures were subjected to immersion under a certain stress level and were subsequently *** addition,one-dimensional compression tests were also supplementally performed to visually observe the immersion-induced degradation of crushed *** test results mainly showed that: (1) the liquefaction resistance,the post-liquefaction undrained strength,and the undrained strength without a precedent cyclic-loading history decreased significantly with increasing mudstone content,M c ,up to 20%;(2) even a small amount of crushed mudstone affected these strengths;(3) the above-mentioned large reductions in the strengths were attributed to the immersion-induced degradation of crushed mudstone;(4) at M_(c) >20%,the liquefaction resistance increased while the significant increase in the undrained static strengths with and without precedent cyclic-loading histories was not observed;and (5) the increase in the liquefaction resistance at M_(c) >20% may have been attributed to both the gradual increase in the plasticity and the formation of the soil aggregates among deteriorated crushed mudstone,while the increase in the specimen density did not play an important role in such behavior.

关键词： Liquefaction Post-liquefaction behavior Triaxial test Sands containing crushed mudstone

A review on g-c_(3)N_(4)decorated with silver for photocatalytic energy conversion

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chinese chemical Letters 2024年第2期35卷 187-196页

作者： Ziyu Pan Wufan Ding Hanchun chen Haodong Ji Eco-environment and Resource Efficiency Research Laboratory School of Environment and EnergyPeking University Shenzhen Graduate SchoolShenzhen 518055China

Artificial photocatalytic energy conversion is considered as the most potential strategy for solving the increasingly serious energy crisis and environmental pollution problems by directly capturing solar ***,high efficiency photocatalyst has drawn significant research attention in recent *** to the excellent electronic,optical,structural,and physicochemical performances,silver-based g-c_(3)N_(4)have become promising *** review emphasizes the recent progresses and challenges on g-c_(3)N_(4)decorated with silver for photocatalytic energy *** extensive use of g-c_(3)N_(4)decorated with silver in diverse photocatalytic reactions,including hydrogen evolution,pollutant degradation and carbon dioxide reduction,is also fully *** addition,we propose the perspectives of g-c_(3)N_(4)decorated with silver on photocatalytic *** hope that this review will shed some light on the photocatalytic energy conversion of g-c_(3)N_(4)decorated with silver.

关键词： g-c_(3)N_(4) Silver-modified g-c_(3)N_(4) Photocatalytic energy conversion H_(2)evolution Pollutant degradation cO_(2)reduction

An aqueous magnesium-ion hybrid supercapacitor operated at-50℃

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Green Energy & Environment 2024年第4期9卷 702-712页

作者： Guoshen Yang Gangrui Qu chi Fang Jie Deng Xianqi Xu Yinghao Xie Tian Sun Yachao Zhu Jiaxin Zheng Hang Zhou School of Electronic and computer Engineering Peking University Shenzhen Graduate SchoolShenzhen518055China School of Advanced Materials Peking University Shenzhen Graduate SchoolShenzhenChina college of Food and Biological Engineering Chengdu UniversityChengdu610106China Institute charles Gerhardt Montpellier UMR 5253Universitae MontpellierMontpellierCC 1502France

The recent advances in aqueous magnesium-ion hybrid supercapacitor(MHSc)have attracted great attention as it brings together the benefits of high energy density,high power density,and synchronously addresses cost and safety ***,the freeze of aqueous electrolytes discourages aqueous MHSc from operating at low-temperature ***,a low-concentration aqueous solution of 4 mol L^(-1) Mg(clO_(4))_(2) is devised for its low freezing point(-67℃)and ultra-high ionic conductivity(3.37 mS cm^(-1) at-50℃).Both physical characterizations and computational simulations revealed that the Mg(clO_(4))_(2) can effectively disrupt the original hydrogen bond network among water molecules via transmuting the electrolyte structure,thus yielding a low freezing ***,the Mg(clO_(4))_(2) electrolytes endue aqueous MHSc with a wider temperature operation range(-50℃–25℃)and a higher energy density of 103.9 Wh kg^(-1) at 3.68 kW kg^(-1) over commonly used magnesium salts(i.e.,MgSO_(4) and Mg(NO_(3))_(2))***,a quasi-solid-state MHSc based on polyacrylamide-based hydrogel electrolyte holds superior low-temperature performance,excellentﬂexibility,and high *** work pioneers a convenient,cheap,and eco-friendly tactic to procure low-temperature aqueous magnesium-ion energy storage device.

关键词： Low-concentration aqueous electrolyte Anti-freezing property Magnesium-ion hybrid supercapacitor High energy density

α,β-Dehydroamino Acid Synthesis through Proline-catalyzed Aldol condensation with a Glycine Schiff Base

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Precision chemistry 2024年第1期2卷 14-20页

作者： Jun Sawamura Daikan Ieiri Ryo Yazaki Takashi Ohshima graduate School of Pharmaceutical Sciences Kyushu UniversityFukuoka 812-8582Japan

A general protocol for the synthesis ofα,β-dehydroamino acids and their peptides was *** efficiently catalyzed an aldol condensation reaction of a glycine Schiff base with a variety of *** hydroxy group on the benzophenone imine was crucial for high Z/E selectivity and further transimination for protecting group-freeα,β-dehydroamino *** elongation of both the c-and N-terminals highlighted the usefulness of our present protocol.

关键词： α β-dehydroamino acid peptide proline aldol condensation glycine Schiff base transimination

Two distinct subpopulations of marginal zone B cells exhibit differential antibody-producing capacities and radioresistance

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cellular & Molecular Immunology 2024年第4期21卷 393-408页

作者： Sujin Lee Yeunjung Ko Hyun Woo Lee Won Joon Oh Hun Gi Hong Dinuka Ariyaratne Se Jin Im Tae Jin Kim Department of Immunology Graduate School of Basic Medical ScienceSungkyunkwan University School of MedicineSuwon16419Republic of Korea Department of Immunology and Molecular Medicine Faculty of Medical SciencesUniversity of Sri JayewardenepuraNugegodaSri Lanka Present address:Immunology and Microbiology graduate Program Baylor College of MedicineHoustonTX77030USA

Marginal zone(MZ)B cells,which are splenic innate-like B cells that rapidly secrete antibodies(Abs)against blood-borne pathogens,are composed of heterogeneous ***,we showed that MZ B cells can be divided into two distinct subpopulations according to their cD80 expression ***80^(high)MZ B cells exhibited greater Ab-producing,proliferative,and IL-10-secreting capacities than did cD80^(low)MZ B ***,cD80^(high)MZ B cells survived 2-Gy whole-body irradiation,whereas cD80^(low)MZ B cells were depleted by irradiation and then repleted with one month after *** of cD80^(low)MZ B cells led to accelerated development of type II collagen(cII)-induced arthritis upon immunization with bovine ***80^(high)MZ B cells exhibited higher expression of genes involved in proliferation,plasma cell differentiation,and the antioxidant ***80^(high)MZ B cells expressed more autoreactive B cell receptors(BcRs)that recognized double-stranded DNA or cII,expressed more immunoglobulin heavy chain sequences with shorter complementarity-determining region 3 sequences,and included more clonotypes with no N-nucleotides or with B-1a BcR sequences than cD80^(low)MZ B *** transfer experiments showed that cD21^(+)cD23^(+)transitional 2 MZ precursors preferentially generated cD80^(low)MZ B cells and that a proportion of cD80^(low)MZ B cells were converted into cD80^(high)MZ B cells;in contrast,cD80^(high)MZ B cells stably remained cD80^(high)MZ B *** summary,MZ B cells can be divided into two subpopulations according to their cD80 expression levels,Ab-producing capacity,radioresistance,and autoreactivity,and these findings may suggest a hierarchical composition of MZ B cells with differential stability and BcR specificity.

关键词： Marginal Zone B cell cD80 Autoreactivity Radioresistance

Xuebijing improves intestinal microcirculation dysfunction in septic rats by regulating the VEGF-A/PI3K/Akt signaling pathway

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World Journal of Emergency Medicine 2024年第3期15卷 206-213页

作者： A-ling Tang Yan Li Li-chao Sun Xiao-yu Liu Nan Gao Sheng-tao Yan Guo-qiang Zhang Department of Emergency China-Japan Friendship HospitalBeijing 100029China graduate School Beijing University of Chinese MedicineBeijing 100105China

BAcKGROUND:This study aims to explore whether Xuebijing(XBJ) can improve intestinal microcirculation dysfunction in sepsis and its ***:A rat model of sepsis was established by cecal ligation and puncture(cLP).A total of 30 male SD rats were divided into four groups:sham group,cLP group,XBJ + axitinib group,and XBJ *** was intraperitoneally injected 2 h before *** data(blood pressure and heart rate) were *** intestinal microcirculation data of the rats were analyzed via microcirculation ***-linked immunosorbent assay(ELISA) kits were used to detect the serum levels of interleukin-6(IL-6),c-reactive protein(cRP),and tumor necrosis factor-α(TNF-α) in the *** analysis and transmission electron microscopy were used to analyze the injury of small intestinal microvascular endothelial cells and small intestinal mucosa in *** expression of vascular endothelial growth factor A(VEGF-A),phosphoinositide 3-kinase(PI3K),phosphorylated PI3K(p-PI3K),protein kinase B(Akt),and phosphorylated Akt(p-Akt) in the small intestine was analyzed via Western ***:XBJ improved intestinal microcirculation dysfunction in septic rats,alleviated the injury of small intestinal microvascular endothelial cells and small intestinal mucosa,and reduced the systemic inflammatory ***,XBJ upregulated the expression of VEGF-A,p-PI3K/total PI3K,and p-Akt/total Akt in the rat small ***:XBJ may improve intestinal microcirculation dysfunction in septic rats possibly through the VEGF-A/PI3K/Akt signaling pathway.

关键词： Sepsis Xuebijing Vascular endothelial growth factor A Microcirculation Rat Phosphoinositide 3-kinase Protein kinase B

A Hydrogen-Bonded,Hexagonally Networked,Layered Framework with Large Aperture Designed by Structural Synchronization of a Macrocycle and Supramolecular Synthon

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Precision chemistry 2024年第5期2卷 221-228页

作者： Hiroki Yoshimura Ryusei Oketani Miki Naruoka Norimitsu Tohnai Ichiro Hisaki Division of chemistry Graduate School of Engineering ScienceOsaka UniversityToyonakaOsaka 560-8531Japan Department of Applied chemistry Graduate School of EngineeringOsaka UniversitySuitaOsaka 565-0871Japan

To develop porous organic frameworks,precise control of the stacking manner of two-dimensional porous motifs and structural characterization of the resultant framework are *** these points of view,porous molecular crystals formed through reversible intermolecular hydrogen bonds,such as;hydrogen-bonded organic frameworks(HOFs),can provide deep insight because of their high crystallinity,affording single-crystalline X-ray diffraction *** this study,we demonstrate that the stacking manner of hydrogen-bonded hexagonal network(HexNet)sheets can be controlled by synchronizing a homological triangular macrocyclic tecton and a hydrogen-bonded cyclic supramolecular synthon called the phenylene triangle.A structure of the resultant HOF was crystallographically characterized and revealed to have a large channel aperture of 2.4 *** HOF also shows thermal stability up to 290°c,which is higher than that of the conventional HexNet frameworks.

关键词： hydrogen-bonded organicframeworks hexagonalnetwork macrocycle carboxylicacid porosity