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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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Olfactory receptors in neural regeneration in the central nervous system

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neural Regeneration research 2025年第9期20卷 2480-2494页

作者： Rafael Franco Claudia Garrigós Toni Capó Joan Serrano-Marín Rafael Rivas-Santisteban Jaume Lillo Molecular neurobiology laboratory Department of Biochemistry and Molecular BiomedicineFacultat de BiologiaUniversitat de BarcelonaBarcelonaSpain Ciberned network Center for Biomedical research in neurodegenerative Diseases Spanish National Health Institute Carlos ⅢMadridSpain School of Chemistry Universitat de BarcelonaBarcelonaSpain department of Biochemistry and Physiology School of Pharmacy and Food SciencesUniversitat de BarcelonaBarcelonaSpain laboratory of Computational Medicine Biostatistics UnitFaculty of MedicineAutonomous University of BarcelonaCampus BellaterraBarcelonaSpain

Olfactory receptors are crucial for detecting odors and play a vital role in our sense of smell,influencing behaviors from food choices to emotional *** receptors also contribute to our perception of flavor and have potential applications in medical diagnostics and environmental *** ability of the olfactory system to regenerate its sensory neurons provides a unique model to study neural regeneration,a phenomenon largely absent in the central nervous *** gained from how olfactory neurons continuously replace themselves and reestablish functional connections can provide strategies to promote similar regenerative processes in the central nervous system,where damage often results in permanent *** the molecular and cellular mechanisms underpinning olfactory neuron regeneration could pave the way for developing therapeutic approaches to treat spinal co rd injuries and neurodegenerative diseases like Alzheimer's *** ctory receptors are found in almost any cell of eve ry orga n/tissue of the mammalian *** ectopic expression provides insights into the chemical structures that can activate olfactory *** addition to odors,olfactory receptors in ectopic expression may respond to endogenous compounds and molecules produced by mucosal colonizing *** analysis of the function of olfactory receptors in ectopic expression provides valuable information on the signaling pathway engaged upon receptor activation and the receptor's role in proliferation and cell differentiation *** review explo res the ectopic expression of olfa ctory receptors and the role they may play in neural regeneration within the central nervous system,with particular attention to compounds that can activate these receptors to initiate regenerative *** suggests that olfactory receptors could serve as potential therapeutic targets for enhancing neural repair and recovery following central nervous syste

关键词： adenosine receptors adrenergic receptors ectopic expression G proteincoupled receptors glia neurons

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I-Stepholidine increases the frequency of sEPSC via the activation of D1 dopamine signaling pathway in rat prelimbic cortical neurons

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Acta Pharmacologica Sinica 2007年第5期 627-633页

作者： Ming GAO Chang-liang LIU Shen YAnG Xue-chu ZHEn Guo-zhang JIn department of Pharmacology,State Key laboratory of Drug research,Institute of Materia Medica,Shanghai Institutes for Biological Sciences,Chinese Academy of Sciences,Shanghai 201203,China

Aim:To investigate the effect of l-stepholidine (SPD) on the frequency of spon-taneous excitatory postsynaptic currents (sEPSC) in the pyramidal cells betweenlayers Ⅴ and Ⅵ in the prelimbic cortex (PL).Methods:A whole-cell patch clamp inrat brain slices was ***:SPD significantly increased the frequency ofsEPSC in a concentration-dependent manner.A selective D1dopamine receptorantagonist SCH23390 blocked SPD-mediated effects,whereas the D1agonistSKF38393,but not the D2/3antagonist sulpiride,mimicked SPD-mediated increasein the frequency of ***,both protein kinase A (PKA) inhibitor n-(2-[p-bromocinnamylamino]-ethyl)-5-isoquinolinesulfonamide hydrochloride andprotein kinase C (PKC) inhibitor chelerythrine attenuated the effect of SPD ***:SPD elicits its effect on the frequency of sEPSC on the PLpyramidal cells via presynaptic D1receptors,and is dependent on PKA and PKCsignaling pathways.

关键词： l-stepholidine prelimbic cortex whole-cell patch clamp spontaneous excitatory postsynaptic currents dopamine receptor

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On the Unusual Holocene Carbonate Sediment in Lake nam Co,Central Tibet

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Journal of Mountain Science 2009年第4期6卷 346-353页

作者： LI Minghui KAnG Shichang ZHU Liping WAnG Feiyue WAnG Junbo YI Chaolu FAnG Xiaomin XIE Manping Key laboratory of Tibetan Environment Changes and Land Surface Processes Institute of Tibetan Plateau Research CAS Beijing 100085 China State Key laboratory of Cryospheric Science CAS Lanzhou 730000 China department of Environment and Geography and department of Chemistry University of Manitoba Winnipeg MB R3T 2N2 Canada

In lacustrine sediments,aragonite is a widespread mineral,whereas monohydrocalcite is a rare carbonate mineral. In the cold and high-attitude Xizang (Tibetan) Plateau,where aragonite has been commonly found in lacustrine sediments,there is no aragonite,but low-Mg calcite,monohydrocalcite and trace dolomite. The lake receives solutes primarily from surface runoffs and remains fairly constant water chemistry for a long time. The total CaCO3 percentage in sediments could be controlled by evaporation and inflow of detrital materials. The absence of aragonite is unusual when compared to other lacustrine sediments from the Tibetan Plateau. This could be due to low Ca/Mg ratio,low salinity,low Mg and Ca concentration. Monohydrocalcite might precipitate from the lake water mediated by biological activities. Low-Mg calcite originated from minor ostracoda shell and the precipitation of lake water with biological activities.

关键词： Carbonate minerals Lacustrine sediments Environment change nam Co Tibet

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Covalent Organic Framework with Predesigned Single-Ion Traps for Highly Efficient Palladium Recovery from Wastes

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CCS Chemistry 2024年第8期6卷 1908-1919页

作者： Yinghui Xie Qiuyu Rong Caimei Wen Xiaolu Liu Mengjie Hao Zhongshan Chen Hui Yang Geoffrey I.n.Waterhouse Shengqian Ma Xiangke Wang College of Environmental Science and Engineering North China Electric Power UniversityBeijing 102206 School of Chemical Sciences The University of AucklandAuckland 1142 department of Chemistry University of North TexasDentonTexas 76201

The recovery of palladium from waste streams is of importance for metal recycling and environmental ***,we present a“single-ion trap”strategy for efficiently recovering Pd(II)from superacidic solutions and laboratory *** was realized by rational design and synthesis of an antiparallel stacked covalent organic framework(ACOF)with hydrazine-carbonyl sites and pyridine sites for cooperative Pd(II)*** single-ion traps provided Lewis base sites with a high Pd(II)binding affinity,enabling the trapping of Pd(II)ions under a wide range of *** developed ACOF-1 adsorbent demonstrated fast kinetics,excellent selectivity,and a high adsorption capacity of 412.9±14.2 mg/g for Pd(II)in a 3M HnO_(3) *** applied in a packed column,ACOF-1 dynamically captured Pd(II)from3M HnO_(3) solutions or laboratorywastes containing trace amounts of palladium and many other metals,realizing extraction efficiencies of 232.9 and 320.9 mg/g,*** experimental and theoretical studies revealed that the single-ion traps offered exceptionally strong binding of Pd(II)under both acidic and high ionic strength conditions,enabling selective adsorptive behavior not accessible using traditional ***,the general design strategy reported here could be used to create porous adsorbents for the capture of other precious metals.

关键词： antiparallel stacking covalent organic frameworks binding affinity selective adsorption Pd(II)recovery

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甲基异柳磷防治土壤害虫试验示范总结

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华中师范大学学报(自然科学版) 1982年第2期 90-95页

作者： national Cooperative research Group of the Preventi n and control of Soil InsectsPlant Protection Institute,Agricultural Academy of ChinaPesticide research laboratory,department of Chemistry,Central China Teachers CollegePesticide Factory of Jiao County,Shandong Province 山东省胶县农药厂华中师范学院化学系农药研究室全国地下害虫综合防治研究协作组中国农业科学院植物保护研究所

本文主要报导了甲基异柳磷的大田药效示范试验结果,试验表明:在一般情况下,以0.04～0.05%的甲基异柳磷(有效成分)进行小麦拌种,可有效地防治如蝼蛄等土壤害虫,保苗率达90～95%以上,残效期可达30～45天.

关键词：甲基异柳磷药效害虫示范总结

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Assessment of nitrogen Pollutant Sources in Surface Waters of Taihu Lake Region

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Pedosphere 2007年第2期17卷 200-208页

作者： XIE Ying-Xin XIOnG Zheng-Qin XInG Guang-Xi SUn Guo-Qing ZHU Zhao-Liang State Key laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 （China） national Engineering research Center for Wheat Henan Agricultural University Zhengzhou 450002 （China） department of Physics Portland State University Portland Oregon 97207 （USA）

The nitrogen （n） pollution status of the 12 most important rivers in Changshu, Taihu Lake region was investigated. Water samples were collected from depths of 0.5-1.0 m with the aid of the global positioning system （GPS）. The seasonal variations in the concentrations of different n components in the rivers were measured. Using tension-free monolith lysimeters and ^15n-labeled fertilizer, field experiments were carried out in this region to determine variations of iSn abundance of nO3^- in the leachate during the rice and wheat growing seasons, respectively. Results showed that the main source of n pollution of surface waters in the Taihu Lake region was not the n fertilizer applied in the farmland but the urban domestic sewage and rural human and animal excreta directly discharged into the water bodies without treatment. Atmospheric dry and wet n deposition was another evident source of n pollutant of the surface waters. In conclusion, it would not be correct to attribute the n applied to farmlands as the source of n pollution of the surface waters in this region.

关键词： atmospheric dry and wet n deposition iSn-labeled fertilizer n pollution sources in surface waters n runoff from the farmland Taihu Lake region

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Prevention of diabetic microangiopathy by prophylactic transplant of mobilized peripheral blood mononuclear cells

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Acta Pharmacologica Sinica 2007年第1期28卷 89-97页

作者： Bin ZHOU~(2,5) Xiao-cang CAO~(2,3,5) Zhi-hong FAnG~2 Cui-lin ZHEnG~2 Zhi-bo HAn~2 He REn2, Man-chiu POOn~(2,4) Zhong-chao HAn~(2,6)2 State Key laboratory of Experimental Hematology,national research Center for Stem Cell Engineering and Technology,Institute of Hematology,Chinese Academy of Medical Sciences and Peking Union Medical College,Tianjin 300020, China 3 department Gastroenterology,TMU,General Hopital of Tianjin Medical University,Tianjin 300052,China 4 departments of Medicine,University of Calgary,Alberta T2n 2T9,Canada State Key laboratory of Experimental Hematology National Research Center for Stem Cell Engineering and Technology Institute of Hematology Chinese Academy of Medical Sciences and Peking Union Medical College Tianjin China department Gastroenterology TMU General Hopital of Tianjin Medical University Tianjin China departments of Medicine University of Calgary Alberta Canada

Aim:To investigate whether the prophylactic local delivery of mobilized periph-eral blood mononuclear cells(M-PBMnC)could prevent peripheral microangio-pathy in diabetic nude ***:Diabetic nude mice were induced withintraperitoneal injections of *** the time course of diabetes,wedetected the capillary and arteriole density of mice adductor muscles by *** situ apoptosis was detected by using TdT-mediated dUTP nickend labeling(TUnEL)methods.M-PBMnC were labeled and locally delivered tothe adductor *** cells were also isolated and cultured in vitrofor the detection and counting of endothelial progenitor cells(EPC).Results:Rarefication of capillaries and arterioles,enhanced apoptosis in adductor muscles,and reduced circulating EPC in diabetic nude *** local delivery ofM-PBMnC halted the progression of microvascular rarefaction in hind-limb skel-etal muscles by inhibiting *** detected the survival,migration andincorporation of transplanted M-PBMnC into the murine vasculature in ***,more EPC were available from M-PBMnC than non-mobilized ***:These results suggested that the prophylactic local delivery ofM-PBMnC may represent a novel approach for the treatment of microvascularcomplications in diabetics.

关键词： prevention diabetic angiopathis transplan tation endothelial cells stem cells

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numerical simulation of mechanisms of deformation,failure and energy dissipation in porous rock media subjected to wave stresses

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Science China(Technological Sciences) 2010年第4期53卷 1098-1113页

作者： JU Yang1,2,WAnG HuiJie1,YAnG YongMing1,HU QinAng3 & PEnG RuiDong1 1 State Key laboratory of Coal Resources and Safe Mining,Beijing Key laboratory of Fracture and Damage Mechanics of Rock and Concrete,China University of Mining and Technology,Beijing 100083,China 2 department of Mechanical and Manufacturing Engineering,University of Calgary,Calgary,Alberta,T2n 1n4,Canada 3 School of Environment and Civil Engineering,College of Engineering,Oklahoma State University,Stillwater,OK 74078,USA State Key laboratory of Coal Resources and Safe Mining Beijing Key Laboratory of Fracture and Damage Mechanics of Rock and Concrete China University of Mining and Technology Beijing China department of Mechanical and Manufacturing Engineering University of Calgary Calgary Canada School of Environment and Civil Engineering College of Engineering Oklahoma State University Stillwater USA

The pore characteristics,mineral compositions,physical and mechanical properties of the subarkose sandstones were acquired by means of CT scan,X-ray diffraction and physical tests.A few physical models possessing the same pore characteristics and matrix properties but different porosities compared to the natural sandstones were *** 3D finite element models of the rock media with varied porosities were established based on the CT image processing of the physical models and the MIMICS software *** failure processes of the porous rock media loaded by the split Hopkinson pressure bar(SHPB) were simulated by satisfying the elastic wave propagation *** dynamic responses,stress transition,deformation and failure mechanisms of the porous rock media subjected to the wave stresses were *** is shown that an explicit and quantitative analysis of the stress,strain and deformation and failure mechanisms of porous rocks under the wave stresses can be achieved by using the developed 3D finite element *** applied wave stresses of certain amplitude and velocity,no evident pore deformation was observed for the rock media with a porosity less than 15%.The deformation is dominantly the combination of microplasticity(shear strain),cracking(tensile strain) of matrix and coalescence of the cracked regions around *** stresses lead to microplasticity,while tensile stresses result in cracking of the *** and coalescence of the matrix elements in the neighborhood of pores resulted from the high transverse tensile stress or tensile strain which exceeded the threshold *** simulation results of stress wave propagation,deformation and failure mechanisms and energy dissipation in porous rock media were in good agreement with the physical *** present study provides a reference for analyzing the intrinsic mechanisms of the complex dynamic response,stress transit mode,deformation and failure mechanisms and the disaster mechanism

关键词： porous media three-dimensional finite element model rock media stress wave failure mechanism energy dissipation

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Synthesis and Crystal Structure of Cu( Ⅱ ) Adduct with n-(4-Chlorophenyl)aza 15-Crown-5

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Chemical research in Chinese Universities 1991年第1期7卷 1-5页

作者： Yan Shiping Wang Genglin (department of Chemistry, nankin University, Tianjin)Yao Xinkan Wang Honggen (Central laboratory, nankai University, Tianjin)

The title compound C18 H25 nC4ClBr2Cu crystallizes in space group P 1 with a = 1.0105(2)nm b=1.0821(1) nm, c=1. 1007(2) nm, a=80. 00(1)°,β=80. 26(1)° γ=77. 83(1)°. Z=2, D = 1. 831 g/cm3, μ=62. 658 cm-1(Mok(?)). The final refinement converged to R=0. 031 for 2547 independent observed reflections. The complex molecule consists of two cationic moieties (HL)+ and an anion which appears as a bromide-bridged copper dimer (Cu2Br6)2-. This structural characterization seems to be rare in metal complexes with crown-ether.

关键词： Crown-ether Copper complex Crystal structure

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