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Unbound^(2.)O,the heaviest oxygen isotope observed:a cutting-edge probe for testing nuclear models

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Nuclear Science and Techniques 2024年第2期35卷 1-2页

作者： jian-Guo Li Bai-Shan Hu Shuang Zhang Fu-{1. Xu School of Physics and State Key Laboratory of Nuclear Physics and TechnologyPeking UniversityBeijing 100871China institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Southern Center for Nuclear-Science Theory(SCNT) Institute of Modern PhysicsChinese Academy of SciencesHuizhou 516000China

The beyond-dripline oxygen isotopes^(2.,2.)O were recently observed at RIKEN,and were found to be unbound decaying into^(2.)O by emitting *** unbound feature of the heaviest oxygen isotope,^(2.)O,provides an excellent test for stateof-the-art nuclear *** atomic nucleus is a self-organized quantum {1.nybody system comprising specific numbers of protons Z and neutrons N.

关键词： testing quantum system

Covalent triazine frameworks modified by ultrafine Pt nanoparticles for efficient photocatalytic hydrogen production

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Nano Research 2024年第6期17卷 4908-4915页

作者： Xu Han Xueying Ge Wen-Wen He Wangwang Shen Tao Zhou jian-Sen Wang {1.-Lin Zhong Abdullah {2.l-Enizi Ay{2.n Nafady Shengqian {2. School of Chemistry and Life Science Advanced Institute of Materials ScienceChangchun University of TechnologyChangchun 130012China Laboratory of Theoretical and Computational Chemistry Institute of Theoretical ChemistryCollege of ChemistryJilin UniversityChangchun 130021China Department of Chemistry University of North Texas1508 W.Mulberry St.DentonTX 76201USA Department of Chemistry College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia

Pt nanoparticles(PtNPs)as active species have always been considered as one of the best semiconductor materials for photocatalytic hydrogen *** this study,a Schottky heterojunction has been successfully constructed by evenly loading ultrafine PtNPs onto a triazine-based covalent organic frameworks(COFs).This strategy maintained the high activity of these ultra-small PtNPs while maximizing the utilization of the Pt active *** fabricated PtNPs@covalent triazine-based framework-1.CTF-1.composite accomplished a significantly high rate of hydrogen evolution(2..0 mmol·g^(−1.·h^(−1.,apparent quantum efficiency(AQE)=7.6%,atλ=450 nm)with 0.40 wt.%Pt loading,giving rise to a 44-fold-increase in the efficiency of the photocatalytic hydrogen production compared to the pristine *** calculations revealed that the strong electron transfer(Q(Pt)=−0.72. qe,in the analysis of Bader charge,Q(Pt)is the charge quantity transferred from Pt cluster to CTF-1.and qe is the unit of charge transfer quantity)between PtNPs and CTF-1.triggers a strong interaction,which makes PtNPs being firmly attached to the structure of CTF-1.thereby enabling high stability and excellent hydrogen production ***,the hydrogen binding free {2.(ΔGH*)of PtNPs@CTF-1.is much lower than that of the unmodified CTF-1.leading to a much lower intermediate state and hence a significant improvement in photocatalytic *** overall findings of this work provide a new platform to incorporate metallic NPs into COFs for the design and fabrication of highly efficient photocatalysts.

关键词： Pt nanoparticles covalent triazine-based framework-1.CTF-1. photocatalysts hydrogen evolution reaction

Human CD56+CD39+ dNK cells support fetal survival through controlling trophoblastic cell fate:immune mechanisms of recurrent early pregnancy loss

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National Science Review 2024年第6期11卷 129-145页

作者： Wentong Jia Liyang ma Xin Yu Feiyang Wang Qian Yang Xiaoye Wang Mengjie Fan Yan Gu Ran Meng {1. Wang Yuxia Li {2. Li Xuan Shao Yan-Ling Wang State Key Laboratory of Stem cell and Reproductive Biology Key Laboratory of Organ Regeneration and ReconstructionInstitute of ZoologyChinese Academy of Sciences beijing {1. for Stem Cell and Regenerative Medicine University of the Chinese Academy of Sciences NHC Key Lab of Reproduction Regulation Shanghai Engineering Research Center of Reproductive Health Drug and Devices Shanghai Institute for Biomedical and Pharmaceutical Technologies National Clinical Center for Obstetrics and Gynecology Peking University Third Hospital Department of Family Planning The Second Hospital of Tianjin Medical University Department of Prenatal Screening Haidian Maternal and Child Health Hospital

Decidual natural killer（dNK） cells are the most abundant immune cells at the maternal-fetal interface during early pregnancy in both mice and humans, and emerging single-cell transcriptomic studies have uncovered various human dNK subsets that are disrupted in patients experiencing recurrent early pregnancy loss（RPL） at early gestational stage, suggesting a connection between abnormal proportions or characteristics of dNK subsets and RPL pathogenesis. However, the functional mechanisms underlying this association remain unclear. Here, we established a mouse model by adoptively transferring human dNK cells into pregnant NOG（NOD/Shi-scid/IL-2.γnull） mice, where human dNK cells predominantly homed into the uteri of recipients. Using this model, we observed a strong correlation between the properties of human dNK cells and pregnancy outcome. The transfer of dNK cells from RPL patients（dNK-RPL）remarkably worsened early pregnancy loss and impaired placental trophoblast cell differentiation in the recipients. These adverse effects were effectively reversed by transferring CD56+CD39+dNK *** studies revealed that CD56+CD39+dNK subset facilitates early differentiation of mouse trophoblast stem cells（m TSCs） towards both invasive and syncytial pathways through secreting macrophage colony-stimulating factor（M-CSF）. Administration of recombinant M-CSF to NOG mice transferred with dNK-RPL efficiently rescued the exacerbated pregnancy outcomes and fetal/placental development. Collectively, this study established a novel humanized mouse model featuring functional human dNK cells homing into the uteri of recipients and uncovered the pivotal role of M-CSF in fetal-supporting function of CD56+CD39+dNK cells during early pregnancy, highlighting that M-CSF may be a previously unappreciated therapeutic target for intervening RPL.

关键词： recurrent pregnancy loss CD56+CD39+ dNK subset NOG mice adoptive transfer placental trophoblast cell fate M-CSF

Correlation of Behavior Changes and BOLD Signal in Alzheimer-like Rat Model

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Acta Biochimica et Biophysica Sinica 2004年第12期36卷 803-810页

作者： Zheng-Hui HU#, Xiao-Chuan WANG1#, Li-Yun LI3, mai-Li LIU3, rong LIU1, Zhiqun LING1, Qing TIAN1, Xiao-Wei TANG, Yi-Gen WU2., and {2.-Zhi WANG1* Department of Physics and Bio-X disciplinary Laboratory, Zhe{2.g University, Hangzhou 31002.,china 1 Department of Pathophysiology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, china 2.6} of High energy Physics and Key Laboratory of Nuclear Analysis Techniques, Chinese Academy of Sciences, P.O. Box 918, beijing 100039, china 3Wuhan institute of Physics and mathematics, State Key Laboratory of magnetic Resonance and atomic and Molecular Physics, Chinese Academy of Sciences, Wuhan 430071, china Department of Physics and Bio-X disciplinary Laboratory Zhejiang UniversityHangzhou 310027China Department of Pathophysiology Tongji Medical College Huazhong University of Science and TechnologyWuhan 430030 China Wuhan institute of Physics and {1.the{1.tics State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Chinese Academy of SciencesWuhan 430071 China institute of High {1. Physics and Key Laboratory of Nuclear Analysis Techniques Chinese Academy of SciencesP.O. Box 918 Beijing 100039 China

To explore a potential means for the early diagnosis of Alzheimer disease, we studied the relationship of resting T2. signal and tau hyperphosphorylation/spatial memory deficit. The rat model with tau hyperphosphorylation and spatial memory deficit was established by bilateral hippocampi injection of isoproterenol (IP). Then, the correlative alteration between resting T2. signal and spatial memory retention was assessed with blood oxygenation level dependent (BOLD) functional magnetic resonance imaging (fMRI) study and Morris Water maze test, and Western blot was employed to confirm tau hyperphosphorylation. The analysis showed following results. (1. Tau phosphorylation at Ser396/Ser404 and Ser1.9/Ser2.2.was signifi- cantly increased in IP-injected rats as detected by PHF-1.and tau-1. respectively. (2. An AD-like spatial memory retention disturbance was induced at 2. h after isoproterenol injection. (3) A sensitivity threshold of resting T2. signal intensity, which separated the IP-treated rats from vehicle control, was obtained by applying linear regression analysis, and an estimated sensitivity statistical threshold was at 32.62. These results suggest that resting T2. signal may serve as a noninvasive quantitative marker in predicting AD-like spatial memory deficits and tau hyperphosphorylation.

关键词： Alzheimer disease (AD) functional magnetic resonance imaging (fMRI) isoproterenol (IP) Morris Water maze diagnosis

Microscopic Optical Potential in Nucleus-Nucleus Scattering

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Microscopic Optical Potential in Nucleus-Nucleus Scattering

Contamination assessment,source apportionment and associated health risks of PTEs in agricultural soil under five land-use patterns in Sanya,china

2.07年全国核反应会暨生物物理与核物理学科交叉前沿研讨会

作者： Yinqun ma {1. {2. {2. ma (china institute of atomic energy,beijing,P.R,of china)

A parameter free microscopic optical potential of nucleus-nucleus interaction is presented by a folding method with the isospin dependent complex nucleon-nucleus optical potential, which is calculated in the framework of the Dirac-Bruecker-Hartree-Fock approach. The elastic scattering data of He at *** on C target are analyzed within the standard optical model. To take account of the breakup effect of He in the reaction an

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china Geology 2024年第3期7卷 469-479页

作者： jian-zhou Yang Yan-gang Fu Qiu-li Gong Sheng-ming {1. Jing-jing Gong jian-weng Gao Zhen-liang Wang Yong-wen Cai Shi-xin Tang institute of Geophysical and Geochemical Exploration Chinese Academy of Geological SciencesChina Geological SurveyLangfang 065000China Key Laboratory of Coupling Process and Effect of Natural Resources Elements Ministry of Natural ResourcesBeijing 100055China

To understand the levels of potentially toxic elements(PTEs)contamination in soils and their effects on human health from different agricultural land use in Sanya,{1..1.8 soil samples(64 topsoil samples and corresponding subsoil samples)were collected from the five representative land-use *** coupled plasma mass spectrometry(ICP-MS),atomic fluorescence spectrometry(AFS),and Inductively coupled plasma optical emission spectrometry(ICP-OES)were used to determine the content of PTEs(As,Cd,Hg,Cu,Cr,Ni,Pb,Zn,Co,Mo,Sb,and V).Correlation analysis and factor analysis were used to determine the source of ***-accumulation index(I_(geo)),hazard quotient(HQ),and total carcinogenic risk index(TR)were used to measure the PTEs contamination and its relative health *** showed that the average values of 1. PTEs in topsoil were higher than the Hainan soil geochemical baseline,showing different degrees of PTEs accumulation *** concentration of PTEs in the topsoil was lower than those in the subsoil except for Cd and *** I_(geo)revealed that the major accumulated element in soils was As followed by *** apportionment suggested that parent materials and agricultural practices were the dominant factors for PTEs accumulation in the *** risks of soil samples from five land-use patterns presented a trend of paddy field>dry field>woodland>orchard>garden ***,the HQ values of 1. PTEs were less than the recommended limit of HQ=1.representing that there are no non-carcinogenic risks of PTEs for children and adults in the study *** TR values are within 6.95×1.^(-6)-1.38×1.^(-5),which corresponds to the low *** the PTEs in the agricultural soil of the study area show little influence on the health status of the local population.

关键词： Potentially toxic trace elements(PTEs) Soils Land-use Geo-accumulation index(Igeo) Hazard quotient(HQ) Total carcinogenic risk index(TR) Source apportionment Health risk Agricutural geological survey engineering

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市场准入管制放松与劳动技能溢价

山西财经大学学报 2024年第8期46卷 99-113页

作者：王光丽马融豆建民上海财经大学财经研究所上海200433 上海财经大学公共经济与管理学院上海200433

采用2.1.—2.2.0}中国上市企业数据和多期双重差分模型考察放松市场准入管制对企业劳动技能溢价水平的影响。研究发现,放松市场准入管制将显著扩大企业劳动技能溢价水平,而技能偏向型技术进步是其主要渠道,同时,企业高技能劳动力结构和... 详细信息

采用2.1.—2.2.0}中国上市企业数据和多期双重差分模型考察放松市场准入管制对企业劳动技能溢价水平的影响。研究发现,放松市场准入管制将显著扩大企业劳动技能溢价水平,而技能偏向型技术进步是其主要渠道,同时,企业高技能劳动力结构和盈利能力在二者关系间具有正向调节作用。异质性分析表明,企业劳动密集度、交易成本和产权性质以及宏观市场与制度环境的差异使市场准入负面清单制度的实施效果不同。经济后果检验结果显示,市场准入管制放松将通过扩大劳动技能溢价而推动企业市场竞争力提升。

关键词：市场准入负面清单劳动技能溢价技能偏向型技术进步技能结构盈利能力

Toxicological Evaluation of Chicken-Breast Meat with High-Dose Irradiation

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Journal of Integrative Agriculture 2012年第12期11卷 2088-2096页

作者： ZHU Jia-ting FENG Min YAN jian-min LIU Chun-quan HA Yi-ming GAO Mei-xu YANG Ping WANG Zhi-dong WANG De-ning LI Shu-{1. GU Gui-qiang institute of {1. {2. in Application for Agriculture Jiangsu Academy of Agricultural Sciences institute of Farm Product Processing Jiangsu Academy of Agricultural Sciences institute of Agro-Products Processing Science&Technology Chinese Academy of Agricultural Sciences

In this paper, toxicity and safety of high-dose irradiated chicken-breast meat were evaluated. For assays of acute toxicity, genetic toxicity, and sub-chronic toxicity, ames test, mice bone marrow erythrocyte micronucleus, and mice sperm abnormality were performed. The results showed that, in the acute oral toxicity tests, median lethal dose （more than {2. 000 mg kg-~） in male and female ICR mice showed no toxicological signs. For subacute 30-d oral toxicology of irradiated chicken-breast meat with dose of {2., {2. and 2. kGy in both male and female SD rats, no noticeable toxicological effects were observed. It is concluded that chicken-breast meat with high-dose irradiation has no acute toxicity and no genotoxicity, nor harmful effects on the animal body at the tested dosage range. Therefore, high-dose irradiated chicken-breast meat is safe for pet consumption.

关键词： toxicological assessment chicken-breast meat irradiated high dose

串扰忆阻突触异质离散神经网络的共存放电与同步行为

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物理学报 2024年第11期73卷 56-69页

作者：王璇杜健嵘李志军马铭磷李春来湖南理工学院信息光子学与空间光通信湖南省重点实验室岳阳414006 湘潭大学计算机学院·网络空间安全学院湘潭411105 湘潭大学自动化与电子信息学院湘潭411105

突触串扰由相邻突触间神经递质的溢出引起,对神经系统的放电特性及信号传输有着深远影响.利用两个忆阻器模拟生物神经突触,双向耦合Chialvo离散神经元和Rulkov离散神经元,并考虑耦合状态下突触间的串扰行为,构建一类忆阻突触耦合异质离... 详细信息

突触串扰由相邻突触间神经递质的溢出引起,对神经系统的放电特性及信号传输有着深远影响.利用两个忆阻器模拟生物神经突触,双向耦合Chialvo离散神经元和Rulkov离散神经元,并考虑耦合状态下突触间的串扰行为,构建一类忆阻突触耦合异质离散神经网络.研究分析表明,神经网络不动点的数量及稳定性依赖于突触串扰强度.同时,通过分析分岔图、相图、李雅普诺夫指数谱和时序图等发现,随着突触串扰强度的变化,神经网络表现出不同的共存放电行为.此外,基于神经元放电序列的相位差及同步因子,研究了不同耦合强度及不同系统初始条件和参数情形下,突触串扰强度对神经网络同步行为的影响.

关键词：忆阻器异质离散神经网络突触串扰共存放电相位同步