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Generation of polarized electron beams through self-injection in the interaction of a laser with a pre-polarized plasma

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High power laser Science and Engineering 2024年第3期12卷 62-68页

作者： l.r.Yin X.F.li Y.J.Gu N.Cao Q.Kong M.Büscher S.M.Weng M.Chen z.M.Sheng Key laboratory of Nuclear physics and Ion-beam Application(MoE) Institute of Modern PhysicsDepartment of Nuclear Science and TechnologyFudan UniversityShanghaiChina State Key laboratory of High Field laser physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghaiChina SANKEN(Institute of Scientific and Industrial research) Osaka UniversityOsakaJapan Sichuan research Institute Shanghai Jiao Tong UniversityChengduChina peter Grünberg Institut(pGI-6) Forschungszentrum JülichJülichGermany Institut für laser-und plasmaphysik Heinrich-Heine-Universität DüsseldorfDüsseldorfGermany Key laboratory for laser plasmas(MoE) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghaiChina Collaborative Innovation Center of IFSA Shanghai Jiao Tong UniversityShanghaiChina tsung-Dao lee Institute Shanghai Jiao Tong UniversityShanghaiChina

polarized electron beam production via laser wakefield acceleration in pre-polarized plasma is investigated by particlein-cell *** evolution of the electron beam polarization is studied based on the thomas±Bargmann±Michel±telegdi equation for the transverse and longitudinal self-injection,and the depolarization process is found to be influenced by the injection *** the case of transverse self-injection,as found typically in the bubble regime,the spin precession of the accelerated electrons is mainly influenced by the ***,in the case of longitudinal injection in the quasi-1D regime(for example,*** et al.,***.110,135002(2013)),the direction of electron spin oscillates in the laser *** the electrons move around the laser axis,the net influence of the laser field is nearly zero and the contribution of the wakefield can be ***,an ultra-short electron beam with polarization of 99%can be obtained using longitudinal self-injection.

关键词： laser wakefield acceleration longitudinal self-injection particle-in-cell simulation polarized electron beam

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Supported recyclable Metal-free Frustrated lewis pair Catalyst for Catalytic Hydrogenation of Substituted pyridines to piperidines

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Chemical research in Chinese Universities 2024年第4期40卷 682-689页

作者： ma Shaohua tANG zhiyong CAS Key laboratory for Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190P.R.China University of Chinese Academy of Sciences Beijing100049P.R.China

the construction of heterogeneous frustrated lewis pairs(Flps)catalysts is crucial for realizing highly efficient and recyclable pyridines catalytic *** this work,we prepared a recyclable heterogenous Flps catalyst CMp-BF with conjugated microporous polymer CMp-ethynyl as the support via self-catalyzed 1,1-carboboration reaction with commercial lewis acid B(C_(6)F_(5))_(3).the as-synthesized CMp-BF demonstrates superior heterogenous catalytic hydrogenation performance(conversion>99%),and considerable stability(84%conversion after three cycles)in recyclable hydrogenation of 2,*** work provides insights into the fabrication and catalytic application of recyclable heterogenous Flp catalysts.

关键词： pyridine hydrogenation Frustrated lewis pair Conjugated microporous polymer

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In vivo and in vitro study of resorbable magnesium wires for medical implants:Mg purity,surface quality,zn alloying and polymer coating

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Journal of magnesium and Alloys 2024年第6期12卷 2472-2488页

作者： K.tesar J.luňácková M.Jex M.Žaloudková r.Vrbová M.Bartoš p.Klein l.Vištejnová J.Dušková E.Filová z.Sucharda M.Steinerová S.Habr K.Balík A.Singh Department of materials Faculty of Nuclear Sciences and Physical EngineeringCzech Technical University in PragueTrojanova 13Prague 12000Czech Republic Institute of physics Czech Academy of SciencesNa Slovance 2Prague 18221Czech Republic Institute of Dental Medicine First Faculty of MedicineCharles University and General University Hospital in PragueKaterinská32Prague 12801Czech Republic Department of physics Faculty of Nuclear Sciences and Physical EngineeringCzech Technical University in PragueBrehová7Prague 11519Czech Republic Department of Composites and Carbon materials Institute of Rock Structure and MechanicsCzech Academy of SciencesV Holešovickách 41Prague 18209Czech Republic Institute of Anatomy First Faculty of MedicineCharles UniversityU Nemocnice 3Prague 12800Czech Republic Biomedical Center Faculty of Medicine in PilsenCharles UniversityAlej Svobody 76Pilsen 32300Czech Republic Department of pathological physiology Faculty of Medicine in PilsenCharles UniversityAlej Svobody 7632300 PilsenCzech Republic Department of Histology and Embryology Faculty of Medicine in PilsenCharles UniversityAlej Svobody 7632300 PilsenCzech Republic Institute of pathology First Faculty of MedicineCharles University and General University Hospital in PragueStudnickova 2Prague 12800Czech Republic Department of Biomaterials and tissue Engineering Institute of PhysiologyCzech Academy of SciencesVidenska 1083Prague 14200Czech Republic research Center for Structural materials National Institute for Materials Science1-2-1 SengenTsukuba 305-0047Japan

magnesium is an excellent material in terms of biocompatibility and its corrosion products can serve as an active source for new bone ***,localized corrosion and H_(2)generation limit the potential of Mg-based *** low-alloyed Mg-zn wires can strongly reduce problems with large H_(2)bubbles and improve the mechanical properties considerably while maintaining excellent long-term *** pickling and a polymer coating can be effectively used to lower the rate of in vivo *** this work,microstructural,mechanical,and in vitro characterization of 250μm and 300μm extruded wires made from ultra-pure Mg,commercially pure Mg,Mg-0.15zn,Mg-0.4zn and Mg-1zn was ***,Mg-0.4zn wires together with a variant coated with a copolymer of l-lactide andε-caprolactone were tested in vivo on artificially damaged Wistar rat *** on the observed Mg-induced osteogenesis,polymer-coated Mg wires with a small addition of zn are a perspective material for bone-support applications,such as cerclage and fixation wires.

关键词： magnesium resorbable Mg wire Mg-zn implant degradation Biocompatibility study zn grain boundary segregation

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Oil palm Fiber Hybrid Composites: A recent review

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Journal of renewable materials 2024年第10期12卷 1661-1689页

作者： H.A.Aisyah E.Hishamuddin A.W.Noorshamsiana z.Ibrahim r.A.Ilyas Biomass technology Unit Engineering and Processing DivisionMalaysian Palm Oil Board(MPOB)6Persiaran InstitusiBandar Baru BangiKajangSelangor43000Malaysia Department of Chemical Engineering Faculty of Chemical and Energy EngineeringUniversiti Teknologi MalaysiaJohor81310Malaysia

Composite materials from oil palmﬁber enhance sustainability by utilizing renewable resources,reducing depen-dence on non-renewable materials,and lessening environmental *** their mechanical and dimen-sional stability limitations,oil palmﬁber-based polymer composites offer signiﬁcant advantages,such as natural abundance,potential weight reduction,and cost-effectiveness due to local availability and *** growing interest in oil palm hybrid composites,made from blending differentﬁbers,is due to their custo-mizable mechanical and physical *** is one of the most effective methods to reinforce and improve the performance of oil palm-derived composite *** review investigates the structural qualities of hybrid composites made from oil palmﬁbers,their suitability for diverse applications,and recent advancements in theﬁ*** focusing on the availability,properties,applications,challenges,and future direc-tions of oil palmﬁber hybrid composites,this review highlights the potential of these materials to enhance mechanical and functional properties,thereby contributing to sustainable development and innovation in com-posite materials.

关键词： Oil palmﬁber empty fruit bunch mesocarpﬁber hybrid composite

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Impact of polymer matrix on polymer Mechanochromism from Excited State Intramolecular proton transfer

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Chinese Journal of Chemistry 2024年第6期42卷 611-616页

作者： Yu Wu Xin Cheng Huan Hu Shui Hu zhimin ma zhiyong ma Beijing Advanced Innovation Center for Soft matter Science and Engineering Beijing State Key Laboratory of Organic-Inorganic CompositesCollege of Chemical EngineeringBeijing University of Chemical TechnologyBeijing100029 China Center of Advanced Elastomer materials College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing100029 China College of Engineering Peking UniversityBeijing100871 China

Mechanochromic polymers based on non-covalent changes have attracted much attention ***,we report the impact of inter/intramolecular hydrogen bonds on polymer mechanochromism from the excited state intramolecular proton transfer (ESIpt) ***-NH2-OH and phMz=2A are designed and obtained by simple and high-yield synthesis,and are connected into polyurethane and poly(methyl acrylate-co-2-ethylhexyl acrylate),*** the initial state,the phMz-NH2-OH@pU sample shows blue fluorescence from the excited enol form (E*) excitons,owing to intermolecular hydrogen bonds that interrupt the ESIpt reactions but the phMz=2A@pma-2-EA sample expresses cyan fluorescence belonging to the excited keto form (K*) emission,implying that the intramolecular hydrogen bonds ***,under stretching,external force can tune the emission of the phMz=2A@pma-2-EA sample from K* to E* *** external force can putatively still promote a bond rotation,ESIpt reactions remain equivalently interrupted in both the relaxed and stressed states in a hydrogen-bond donating *** calculation confirms the force-induced increase in dihedral angle for the transition of ESIpt-on/***,phMz-NH2-OH@pU and phMz=2A@pma-2-EA showed disparate initial ESIpt states and further different responses/sensitivity to *** study reports a novel and efficient strategy for enriching mechanochromic investigation and extending the applications of ESIpt reactions.

关键词： polymer mechanochromism Excited state intramolecular proton transfer Hydrogen bonding Supramolecular chemistry Elastomers

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Enhancing multifunctional photocatalysis with acetate-assisted cesium doping and unlocking the potential of z-scheme solar water splitting

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Carbon Energy 2024年第3期6卷 178-195页

作者： Mengmeng ma Jingzhen li Xiaogang zhu Kong liu Kaige Huang Guodong Yuan Shizhong Yue zhijie Wang Shengchun Qu Key laboratory of Semiconductor materials Science Beijing Key Laboratory of Low Dimensional Semiconductor Materials and DevicesInstitute of SemiconductorsChinese Academy of SciencesBeijingChina Center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijingChina Department of physics College of Physical Science and TechnologyXiamen UniversityXiamenChina State Key laboratory for Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijingChina

Graphitic carbon nitride(g-C_(3)N_(4))has been extensively doped with alkali metals to enlarge photocatalytic output,in which cesium(Cs)doping is predicted to be the most ***,the sluggish diffusion and doping kinetics of precursors with high melting points,along with imprecise regulation,have raised the debate on whether Cs doping could make *** this matter,we attempt to confirm the positive effects of Cs doping on multifunctional photocatalysis by first using cesium acetate with the character of easy *** optimized Csdoped g-C_(3)N_(4)(CCN)shows a 41.6-fold increase in visible-light-driven hydrogen evolution reaction(HEr)compared to pure g-C_(3)N_(4) and impressive degradation capability,especially with 77%refractory tetracycline and almost 100%rhodamine B degradedwithin an *** penetration ofCs+is demonstrated to be a mode of interlayer doping,and Cs–N bonds(especially with sp^(2) pyridine N in C═N–C),along with robust chemical interaction and electron exchange,are *** atomic configuration triggers the broadened spectral response,the improved charge migration,and the activated photocatalytic ***,we evaluate the CCN/cadmium sulfide hybrid as a z-scheme configuration,promoting the visible HEr yield to 9.02 mmol g^(−1) h^(−1),which is the highest ever reported among all CCN *** work adds to the rapidly expanding field of manipulation strategies and supports further development of mediating served for photocatalysis.

关键词： acetate-assisted cesium doping multifunctional photocatalysis z-scheme

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Exploring dielectric phenomena in sulflower-like nanostructures via Monte Carlo technique

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Communications in theoretical physics 2024年第4期76卷 188-198页

作者： N Saber z Fadil Hussein Sabbah A Mhirech B Kabouchi l Bahmad Chaitany Jayprakash raorane Siva Sankar Sana Hassan Fouad Mohamed Hashem laboratory of Condensed matter and Interdisciplinary Sciences(laMCScI) Research Unit Labelled CNRSTURL-CNRST-17.Faculty of SciencesPO Box 1014Mohammed Ⅴ University in RabatMorocco College of Engineering and technology American University of the Middle EastEgaila 54200Kuwait School of Chemical Engineering Yeungnam UniversityGyeongsan38541Republic of Korea Applied Medical Science Department Community CollegeKing Saud UniversityPO Box 11433Riyadh Saudi Arabia Department of Dental Health College of Applied Medical SciencesKing Saud UniversityPO Box 12372RiyadhSaudi Arabia

this research focuses on the electric behavior of a mixed ferrielectric sulflower-like *** structure includes a core with spin S_(i)^(z)-1 atoms and a shell with spin σ_(j)^(z)-5/2 *** Blume–Capel model and the Monte Carlo technique(MCt)with the Metropolis algorithm are *** are established for absolute zero,investigating stable spin configurations correlated with various physical *** MCt method explores phase transition behavior and electric hysteresis cycles under different physical parameters.

关键词： sulfower-like nanostructure dielectric characteristics Monte Carlo technique phase transition phase diagrams electric hysteresis

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risk factors for hepatocellular carcinoma associated with hepatitis C genotype 3 infection:A systematic review

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World Journal of Gastrointestinal Oncology 2024年第4期16卷 1596-1612页

作者： Hamzah z Farooq Michael James Jane Abbott patrick Oyibo pip Divall Naheed Choudhry Graham r Foster Blizard Institute Queen Mary University of LondonLondon E12ATUnited Kingdom School of Health and psychological Sciences University of LondonLondon EC1V 0HBUnited Kingdom University Hospitals of leicester library University Hospitals of Leicester NHS TrustLeicester LE39QPUnited Kingdom

BACKGrOUND Hepatitis C virus(HCV)is a blood-borne virus which globally affects around 79 million people and is associated with high morbidity and *** infection leads to cirrhosis in a large proportion of patients and often causes hepatocellular carcinoma(HCC)in people with *** the 6 HCV genotypes(G1-G6),genotype-3 accounts for 17.9%of *** genotype-3 responds least well to directly-acting antivirals and patients with genotype-3 infection are at increased risk of HCC even if they do not have *** to systematically review and critically appraise all risk factors for HCC secondary to HCV-G3 in all ***,we studied possible risk factors for HCC due to HCV-G3 in the literature from 1946 to *** this systematic review aimed to synthesise existing and published studies of risk factors for HCC secondary to HCV genotype-3 and evaluate their strengths and *** searched Web of Science,Medline,EMBASE,and CENtrAl for publications reporting risk factors for HCC due to HCV genotype-3 in all settings,*** Four thousand one hundred and forty-four records were identified from the four databases with 260 records removed as *** thousand eight hundred and eighty-four records were screened with 3514 *** hundred and seventy-one full-texts were assessed for eligibility with seven studies included for *** the seven studies,three studies were retrospective case-control trials,two retrospective cohort studies,one a prospective cohort study and one a cross-sectional study *** were based in hospital settings with four in pakistan,two in South Korea and one in the United *** total number of participants were 9621 of which 167 developed HCC(1.7%).All seven studies found cirrhosis to be a risk factor for HCC secondary to HCV genotype-3 followed by higher age(five-studies),with two studies each showing male sex,high alpha feto-protein,directly-acting antivirals trea

关键词： Hepatocellular carcinoma Hepatitis C Genotype 3 Systematic review Blood-borne viruses liver cancer

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ternary superhydrides for high-temperature superconductivity at low pressures

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National Science review 2024年第7期11卷 12-14页

作者： pengfei Shan liang ma Jinguang Cheng Beijing National laboratory for Condensed matter physics and Institute of physics Chinese Academy of Sciences School of physical Sciences University of Chinese Academy of Sciences Key laboratory of materials physics Ministry of Education School of Physics and Microelectronics Zhengzhou University

the quest for room-temperature superconductivity(rtSC) has been a longstanding pursuit in physics since the discovery of superconductivity in *** to the conventional Bardeen-Cooper-Schrieffer theory, atomic metallic hydrogen holds great promise for achieving this goal due to its high Debye temperature and strong electron-phonon coupling.

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SANC Monte Carlo programs for small-angle Bhabha scattering

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Chinese physics C 2024年第4期48卷 14-19页

作者： A.B.Arbuzov S.G.Bondarenko I.r.Boyko l.V.Kalinovskaya A.A.Kampf r.r.Sadykov V.l.Yermolchyk Bogoliubov laboratory of theoretical physics JINRDubna141980 Russia Dzhelepov laboratory of Nuclear problems JINRDubna141980 Russia Dubna State University Dubna141982 Russia

luminosity monitoring at e^(+)e^(−)colliders was investigated using SANC Monte Carlo event generator reneSANCe and integrator MCSANC for simulation of Bhabha scattering at low *** are presented for center-of-mass energies of the z boson resonance and at 240 GeV for the conditions of typical luminosity *** is shown that bremsstrahlung events with extremely low electron scattering angles are relevant to match the precision tags of future electron-positron colliders.

关键词： luminosity Bhabha scattering QED Monte Carlo simulation

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