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24篇 您的检索式:作者名="Yanjie PENG"
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1The enhanced X-ray Timing and Polarimetry mission—eXTP显示文摘In this paper we present the enhanced X-ray Timing and Polarimetry mission—eXTP. eXTP is a space science mission designed to study fundamental physics under extreme conditions of density, gravity and magnetism. The mission aims at determining the equation of state of matter at supra-nuclear density, measuring effects of QED, and understanding the dynamics of matter in strong-field gravity. In addition to investigating fundamental physics, eXTP will be a very powerful observatory for astrophysics that will provide observations of unprecedented quality on a variety of galactic and extragalactic objects. In particular, its wide field monitoring capabilities will be highly instrumental to detect the electro-magnetic counterparts of gravitational wave sources.The paper provides a detailed description of:(1) the technological and technical aspects, and the expected performance of the instruments of the scientific payload;(2) the elements and functions of the mission, from the spacecraft to the ground segment.ShuangNan Zhang Andrea Santangelo Marco Feroci YuPeng Xu FangJun Lu Yong Chen Hua Feng Shu Zhang Sφren Brandt Margarita Hernanz Luca Baldini Enrico Bozzo Riccardo Campana Alessandra De Rosa YongWei Dong Yuri Evangelista Vladimir Karas Norbert Meidinger Aline Meuris Kirpal Nandra Teng Pan Giovanni Pareschi Piotr Orleanski QiuShi Huang Stephane Schanne Giorgia Sironi Daniele Spiga Jiri Svoboda Gianpiero Tagliaferri Christoph Tenzer Andrea Vacchi Silvia Zane Dave Walton ZhanShan Wang Berend Winter Xin Wu Jean J.M.in't Zand Mahdi Ahangarianabhari Giovanni Ambrosi Filippo Ambrosino Marco Barbera Stefano Basso Jörg Bayer Ronaldo Bellazzini Pierluigi Bellutti Bruna Bertucci Giuseppe Bertuccio Giacomo Borghi XueLei Cao Franck Cadoux Francesco Ceraudo TianXiang Chen Yu Peng Chen Jerome Chevenez Marta Civitani Wei Cui WeiWei Cui Thomas Dauser Ettore Del Monte Sergio Di Cosimo Sebastian Diebold Victor Doroshenko Michal Dovciak YuanYuan Du Lorenzo Ducci QingMei Fan Yannick Favre Fabio Fuschino JoséLuis Ga'lvez Min Gao MingYu Ge Olivier Gevin Marco Grassi QuanYing Gu YuDong Gu DaWei Han Bin Hong Wei Hu Long Ji ShuMei Jia WeiChun Jiang Thomas Kennedy Ingo Kreykenbohm Irfan Kuvvetli Claudio Labanti Luca Latronico Gang Li MaoShun Li Xian Li Wei Li ZhengWei Li Olivier Limousin HongWei Liu XiaoJing Liu Bo Lu Tao Luo Daniele Macera Piero Malcovati Adrian Martindale Malgorzata Michalska Bin Meng Massimo Minuti Alfredo Morbidini Fabio Muleri Stephane Paltani Emanuele Perinati Antonino Picciotto Claudio Piemonte JinLu Qu Alexandre Rachevski Irina Rashevskaya Jerome Rodriguez Thomas Schanz ZhengXiang Shen LiZhi Sheng JiangBo Song LiMing Song Carmelo Sgro Liang Sun Ying Tan Phil Uttley Bo Wang DianLong Wang GuoFeng Wang Juan Wang LangPing Wang YuSa Wang Anna L.Watts XiangYang Wen Jörn Wilms ShaoLin Xiong JiaWei Yang Sheng Yang YanJi Yang Nian Yu WenDa Zhang Gianluigi Zampa Nicola Zampa Andrzej A.Zdziarski AiMei Zhang ChengMo Zhang Fan Zhang Long Zhang Tong Zhang Yi Zhang XiaoLi Zhang ZiLiang Zhang BaoSheng Zhao ShiJie Zheng Yu Peng Zhou Nicola Zorzi J.Frans Zwart 2019Science China(Physics,Mechanics & Astronomy)2019,62,2:11
2Fasudil hydrochloride differentiates bone marrow mesenchymal stem cells into neurons via notch signaling显示文摘BACKGROUND: Notch signaling regulates bone marrow mesenchymal stem cell (MSC) proliferation, differentiation, and apoptosis, Notch signaling and Rho kinase signaling exhibit a crosstalk phenomenon with JAK/STAT, and both participate in the neuronal dendritic spine development. Inhibition of RhoA/Rho kinase signaling may regulate MSC differentiation into neuronal-like cells. OBJECTIVE: To investigate the effect of Notch1 signaling on the differentiation of rat MSCs into neurons induced by fasudil hydrochloride (C14H17N3O2S·HCl), a Rho kinase inhibitor, through a siRNA approach. DESIGN, TIME AND SETTING: An in vitro cytological experiment was performed in the Cell Laboratory of Henan Academy of Medical and Pharmaceutical Sciences between December 2007 and May 2009. MATERIALS: MSCs were obtained from Wistar rat femoral bone, fasudil hydrochloride was provided by Tianjin Chase Sun Pharmaceutical Co., Ltd. Rn-notch1-siRNa, negative control siRNA (Cy3 label) and Rn-MAPK1 control siRNA were provided by QIAGEN, Coloqne, German. METHODS: The cultured MSCs were divided into non-transfected, transfected group (transfected with Rn-Notch1-siRNA), positive control (transfected with Rn-MAPK-1 control siRNA), and negative control (transfected with negative control siRNA) groups. Fasudil hydrochloride was applied to induce MSCs to differentiate into neurons. MAIN OUTCOME MEASURES: The fluorescence expression by the transfected MSCs was observed under an inverted fluorescence microscope; the expression of Notch1 mRNA, Hes1 mRNA, and MAPK1 mRNA in MSCs was detected by reverse transcription polymerase chain reaction; the expression of Notch1 protein, nestin, neurofilament M, and glial fibrillary acidic protein was detected by immunocytochemistry. The viability of MSCs was detected by tetrazolium bromide assay. RESULTS: MSC fluorescence increased following a 72-hour siRNA transfection, with transfection efficiencies of up to (0.91 ± 0.04); the Notch1 mRNA and Hes1 mRNA expressed by transfected MSCs was significantly decreased (P < 0.05) compared with non-transfected cells. Fasudil hydrochloride induced MSCs to differentiate into neurons with greater efficiency in the transfected group (P < 0.05). CONCLUSION: Fasudil hydrochloride induces rat MSCs to differentiate into neurons; inhibition of Notch1 signaling and Hes1 expression may jointly promote the differentiation of MSCs into neurons.Eryi Zhao Liudong Wang Quanqing Wen Wenjuan Guan Jingjing Lu Tao Peng Boai Zhang Yanjie Jia 2010Neural Regeneration Research2010,5,11:5
3Fiber-Optic Surface Plasmon Resonance Sensor With Multi-Alternating Metal Layers for Biological Measurement显示文摘Yanjie WANG Shengwei MENG Yuzhang LIANG Lixia LI Wei PENG 2013Photonic Sensors2013,3,3:5
4LncDACH1 promotes mitochondrial oxidative stress of cardiomyocytes by interacting with sirtuin3 and aggravates diabetic cardiomyopathy显示文摘Diabetic cardiomyopathy(DCM)is a common complication in diabetic patients.The molecular mechanisms of DCM remain to be fully elucidated.The intronic long noncoding RNA of DACH1(lnc DACH1)has been demonstrated to be closely associated with heart failure and cardiac regeneration.In this study,we investigated the role of lnc DACH1 in DCM and the underlying molecular mechanisms.The expression of lnc DACH1 was increased in DCM hearts and in high glucose-treated cardiomyocytes.Knockout of lnc DACH1 reduced mitochondrial oxidative stress,cell apoptosis,cardiac fibrosis and hypertrophy,and improved cardiac function in DCM mice.Overexpression of lnc DACH1 exacerbated mitochondria-derived reactive oxygen species(ROS)level and apoptosis,decreased activity of manganese superoxide dismutase(Mn-SOD);while silencing of lnc DACH1 attenuated ROS production,mitochondrial dysfunction,cell apoptosis,and increased the activity of Mn-SOD in cardiomyocytes treated with high glucose.Lnc DACH1 directly bound to sirtuin3(SIRT3)and facilitated its degradation by ubiquitination,therefore promoting mitochondrial oxidative injury and cell apoptosis in mouse hearts.In addition,SIRT3 silencing abrogated the protective effects of lnc DACH1 deficiency in cardiomyocytes.In summary,lnc DACH1 aggravates DCM by promoting mitochondrial oxidative stress and cell apoptosis via increasing ubiquitination-mediated SIRT3 degradation in mouse hearts.Inhibition of lnc DACH1 represents a novel therapeutic strategy for the intervention of diabetic cardiomyopathy.Qi Zhang Danyang Li Xue Dong Xiaowen Zhang Junwu Liu Lili Peng Bo Meng Qi Hua Xinyu Pei Lu Zhao Xiaoxi Hu Yang Zhang Zhenwei Pan Yanjie Lu Baofeng Yang 2022Science China(Life Sciences)2022,65,6:4
5Starch-based adhesive hydrogel with gel-point viscoelastic behavior and its application in wound sealing and hemostasis显示文摘Hydrogels with tissue adhesiveness have demonstrated great promise for wearable electronics,artificial skin,soft robotics,and tissue repair.Nevertheless,adhesive hydrogels that are capable of sealing and hemostasis of wound with severe hemorrhage still lack.For this purpose,a series of ionically crosslinked starch hydrogels were developed here.The viscoelastic properties and tissue adhesiveness of the starch hydrogels were investigated.It is shown that the starch and cross linkers had significant influence on the viscoelastic properties of the starch hydrogels,which further resulted in varied tissue adhesiveness.Among the starch gels,there was one exhibiting a unique and stable'Gel Point'viscoelastic characteristic and it was named as gel-point adhesive hydrogel(GPAH).GPAH showed electrical conductivity,high tissue adhesiveness,high stretch-ability,self-healing capability,injectability,and degradability.The GPAH also exhibited high cytocompatibility,low hemolysis risk,and strong antibacterial effect.The wound sealing and hemostatic performance of GPAH was further evaluated by a rat femoral artery injury model.The blood loss after the sealing of GPAH(2.4±1.3 g)was significantly decreased compared to the group using gauze for sealing(6.3±1.5 g).Meanwhile,GPAH did not cause pathological changes of the soft tissues surrounding the wound.The above results indicate that GPAH,with high tissue adhesiveness,suitable viscoelastic property,strong antibacterial capacity,as well as electro-conductivity,bears great potential for the applications in smart wound management.Yuxuan Mao Peng Li Jiewei Yin Yanjie Bai Huan Zhou Xiao Lin Huilin Yang Lei Yang 2021Journal of Materials Science & Technology2021,,4:3
6A Four-Element Sensor Array Consisting of Asymmetric Distributed-Feedback Fiber Lasers显示文摘在根据他们的斜坡效率登上顺序安排四不对称的分布式反馈的纤维激光(DFB-FL ) 形成的一个传感器数组系统被建议。产量平坦能有效地用不对称的 DFB-FLs 的申请被改进。尽管它获得了最小的泵力量,最后元素几乎与其它一起有一样的产量。相对紧张噪音(RIN ) 和传感器数组的松驰摆动频率也被分析。某个 DFB-FL 的松驰摆动频率与它在数组的相对位置相关,这被发现。并且某个 DFB-FL 的 RIN 被另外的元素总是在数组影响,它不大概他们的安排是依赖的。Pengpeng WANG Jun CHANG Cunguang ZHU Boning SUN Guangping LV Sasa ZHANG Yanjie ZHAO Zhihui SUN Xiaolei ZHANG Gangding PENG 2014Photonic Sensors2014,4,2:2
7A novel nanocomposite matrix based on graphene oxide and ferrocene-branched organically modified sol-gel/chitosan for biosensor application显示文摘Peng Huaping Huang Zhengjun Zheng Yanjie 2014Journal of Solid State Electrochemistry2014,18,:1
8Effects of caveolin-1 on bone marrow mesenchymal stem cells differentiating into neuron-like cells An atomic force microscopy observation显示文摘Bone marrow mesenchymal stem cells(MSCs) from rats were transfected with Rn-siRNA-caveolin-1 and differentiated into neuron-like cells using fasudil hydrochloride.Membrane ultrastructural changes in MSCs were observed under atomic force microscopy.Caveolin-1-transfected rat MSCs exhibited weak nuclear refraction,dense caveolae and long finger-like cellular processes prior to fasudil hydrochloride treatment.MSCs differentiating into neuron-like cells exhibited weak nuclear refraction and large cellular processes without caveolae.We hypothesize that caveolin-1 plays an important role in the regulation of bone marrow MSC differentiating into neuron-like cells.Jingjing Lu Lijun Jing Yonglin Jia Jinyi Li Liudong Wang Tao Peng Yanjie Jia 2011Neural Regeneration Research2011,6,16:1
9Hierarchical top- porous/bottom-tubular TiO2 nanostructures decorated with Pd nanoparticles for efficient photoelectrocatalytic decompo- sition of synergistic pollutants显示文摘Zhang Zhonghai Yu Yanjie Wang Peng 2012Am Chem Soc Mater In- terf2012,4,2:1
10News event tracking using an improved hybrid of KNN and SVM 显示文摘LEI Zhen JIANG Yanjie ZHAO Peng 2009Communication and Networking2009,56,:1
11Distribution of per-and polyfluoroalkyl substances in blood,serum,and urine of patients with liver cancer and associations with liver function biomarkers显示文摘Studies have shown that per-and polyfluoroalkyl substances(PFASs)may be hepatotoxic in animals or humans.However,data on clinical epidemiology are very limited.In this study,21PFASs were determined in patients with liver diseases,with the highest median concentrations detected in the serum sample(26.7 ng/mL),followed by blood(10.7 ng/mL)and urine(5.02 ng/mL).Higher total PFAS concentrations were found in hepatocellular carcinoma(HCC)patients compared to non-HCC patients,with significant discrepancies in serum and blood samples.Besides,significant correlations were also found among PFAS concentrations and age,gender,body mass index(BMI),and liver function biomarkers levels.For example,PFAS concentrations are significantly higher in males than in females;Several serum PFASs concentrations increase with age and BMI,while the serum perfluorohexane sulfonic acid(PFHxS)concentrations are negatively correlated with age.In addition,multiple regression models adjusted for age,gender and BMI found that increased serum perfluorobutane sulfonic acid(PFBS),perfluoroheptane sulfonic acid(PFHpS)and perfluorohexylphosphonic acid(PFHxPA)conentrations are correlated with elevated alkaline phosphatase(ALP),aspartate aminotransferase(AST),and alpha-fetoprotein(AFP)(p<0.05).Our results provide epidemiological support for the future study on the potential clinical hepatotoxicity of PFAS.Cao Dai Lin Peng Yanjie Li Zhendong Li Da Chen Fei Wang Nan Lin 2024Journal of Environmental Sciences2024,,5:0
12Identification of Key Genes as Potential Drug Targets for Gastric Cancer显示文摘Gastric cancer(GC)is one of the most common cancers and ranks the third in cancer mortality all over the world.The goal of this study was to identify potential hub-genes,highlighting their functions,signaling pathways,and candidate drugs for the treatment of GC patients.We used publicly available next generation sequencing(NGS)data to identify differentially expressed(DE)genes.The top DE genes were mapped to STRING database to construct the protein-protein interaction(PPI)network and top hub genes were selected for further analysis.We found a total of 1555 DE genes with 870 upregulated and 685 downregulated genes in GC.We selected the top 400(200 upregulated and 200 downregulated)genes to construct a PPI network and extracted the top 15 hub genes.The gene ontology(GO)term and kyoto encyclopedia of genes and genomes(KEGG)pathway enrichment analyses of the 15 hub genes exposed some important functions and signaling pathways that were significantly associated with GC patients.The survival analysis of the hub genes disclosed that the lower expressions of the three hub genes CDH2,COL4A1,and COL5A2 were associated with better survival of GC patients.These three genes might be the candidate biomarkers for the diagnosis and treatment of GC.Then,we considered 3 key proteins(genomic biomarkers)(COL4A1,CDH2,and CO5A2)as the drug target proteins(receptors),performed their docking analysis with the 102 meta-drug agents,and found Everolimus,Docetaxel,Lanreotide,Venetoclax,Temsirolimus,and Nilotinib as the top ranked 6 candidate drugs with respect to our proposed target proteins for the treatment against GC patients.Therefore,the proposed drugs might play vital role for the treatment against GC patients.Md.Tofazzal Hossain Md.Selim Reza Yin Peng Shengzhong Feng Yanjie Wei 2023Tsinghua Science and Technology2023,28,4:0
13Multi-frequency magnetic resonance elastography of the pancreas:measurement reproducibility and variance among healthy volunteers显示文摘Background Patients with chronic pancreatitis often have irreversible pancreatic insufficiency before a clinical diagnosis.Pancreatic cancer is a fatal malignant tumor in the advanced stages.Patients having high risk of pancreatic diseases must be screened early to obtain better outcomes using new imaging modalities.Therefore,this study aimed to investigate the reproducibility of tomoelastography measurements for assessing pancreatic stiffness and fluidity and the variance among healthy volunteers.Methods Forty-seven healthy volunteers were prospectively enrolled and underwent two tomoelastography examinations at a mean interval of 7 days.Two radiologists blindly and independently measured the pancreatic stiffness and fluidity at the first examination to determine the reproducibility between readers.One radiologist measured the adjacent pancreatic slice at the first examination to determine the reproducibility among slices and measured the pancreas at the second examination to determine short-termrepeatability.The stiffness and fluidity of the pancreatic head,body,and tail were compared to determine anatomical differences.The pancreatic stiffness and fluidity were compared based on sex,age,and body mass index(BMI).Results Bland–Altman analyses(all P>0.05)and intraclass correlation coefficients(all>0.9)indicated near perfect reproducibility among readers,slices,and examinations at short intervals.Neither stiffness(P=0.477)nor fluidity(P=0.368)differed among the pancreatic anatomical regions.The mean pancreatic stiffness was 1.45±0.09 m/s;the mean pancreatic fluidity was 0.83±0.06 rad.Stiffness and fluidity did not differ by sex,age,or BMI.Conclusion Tomoelastography is a promising and reproducible tool for assessing pancreatic stiffness and fluidity in healthy volunteers.Si-Ya Shi Liqin Wang Zhenpeng Peng Yangdi Wang Zhi Lin Xuefang Hu Jiaxin Yuan Li Huang Shi-Ting Feng Yanji Luo 2022Gastroenterology Report2022,10,1:0
14Cerium Methacrylate Assisted Preparation of Highly Thermally Conductive and Anticorrosive Multifunctional Coatings for Heat Conduction Metals Protection显示文摘Preparing polymeric coatings with well corrosion resistance and high thermal conductivity(TC)to prolong operational life and ensure service reliability of heat conductive metallic materials has long been a substantive and urgent need while a difficult task.Here we report a multifunctional epoxy composite coating(F-CB/CEP)by synthesizing cerium methacrylate and ingeniously using it as a novel curing agent with corrosion inhibit for epoxy resin and modifier for boron nitride through'cation-π'interaction.The prepared F-CB/CEP coating presents a high TC of 4.29 W m^(−1)K^(−1),which is much higher than other reported anti-corrosion polymer coatings and thereby endowing metal materials coated by this coating with outstanding thermal management performance compared with those coated by pure epoxy coating.Meanwhile,the low-frequency impedance remains at 5.1×10^(11)Ωcm^(2)even after 181 days of immersion in 3.5 wt%NaCl solution.Besides,the coating also exhibits well hydrophobicity,self-cleaning properties,temperature resistance and adhesion.This work provides valuable insights for the preparation of high-performance composite coatings with potential to be used as advanced multifunctional thermal management materials,especially for heat conduction metals protection.Fei Xu Peng Ye Jianwen Peng Haolei Geng Yexiang Cui Di Bao Renjie Lu Hongyu Zhu Yanji Zhu Huaiyuan Wang 2023Nano-Micro Letters2023,15,11:0
15Bacteriostatic Effect of Extracts from 10 Kinds of Traditional Chinese Medicinal Materials and Garlic on Pectobacterium chrysanthemi显示文摘Pectobacterium chrysanthemi is one of the main pathogens of soft rot disease of Amorphophallus konjac.The bacteriostatic effect of extracts from 10 kinds of traditional Chinese medicine and garlic on Pectobacterium chrysanthemi was studied in this experiment.The results showed that the extracts of Coptis chinensis,garlic,Scutellaria baicalensis,Mume Fructus and Bupleurum had significant bacteriostatic effect.Among them,Coptis chinensis and garlic had the best bacteriostatic effect on Pectobacterium chrysanthemi,and the diameter of inhibition zone was 2.27 and 2.19 cm,respectively,followed by Scutellaria baicalensis,with the diameter of inhibition zone of 1.68 cm.The extracts of Coptis chinensis,Scutellaria baicalensis and garlic with good bacteriostatic effect were diluted by double dilution method,and the bacteriostatic effect was determined.The results showed that 2-fold dilution of Coptis chinensis and 2-fold and 4-fold dilution of Scutellaria baicalensis had significant bacteriostatic effect,but the bacteriostatic effect of garlic extract was not obvious after dilution.Yong ZHOU Mingfu GONG Zhong LIU Yanjie PENG Ying ZHENG 2020Medicinal Plant2020,11,3:0
16High strength and high creep resistant ZrB2/Al nanocomposites fabricated by ultrasonic-chemical in-situ reaction显示文摘In this study, the ZrB2/Al nanocomposites were fabricated via in-situ reaction of the Al-K2ZrF6-KBF4 system, assisted with ultrasonic vibration and spiral electromagnetic stirring. Microstructure, tensile property and creep behavior of the fabricated nanocomposites were further investigated. Microstructure observation showed that the ultrasonic vibration could prevent the fast growth as well as break the clusters of in-situ synthesized nanoparticles in melt, resulted in smaller size (10-50 nm) and relatively more uniform distribution of the in-situ nanoparticles located on the boundary of and/or inside the aluminum matrix grains in the final composites. The fabricated nanocomposites exhibited an enhancement in both strength and ductility, due to the elevated work hardening ability, i.e., improved dislocation propagating ability and decreased dynamic recovery of the existing dislocations induced by the in-situ nanoparticles. Meanwhile, the nanocomposites exhibited excellent creep resistance ability, which was about 2-18 times higher than those of the corresponding aluminum matrix. The stress exponent of 5 was identified for the fabricated nanocomposites, which suggested that their creep behavior was related to dislocation climb mechanism. The enhanced creep resistance of the nanocomposites was attributed to the Orowan strengthening and grain boundary strengthening induced by the ZrB2 nanoparticles. Thus, the ultrasonicchemical in-situ reaction promises a low cost but effective way to fabricate aluminum nanocomposites with high strength and high creep resistance.Xizhou Kai Shuoming Huang Lin Wu Ran Tao Yanjie Peng Zemin Mao Fei Chen Guirong Li Gang Chen Yutao Zhao 2019Journal of Materials Science & Technology2019,35,9:0
17Construction of 3D interconnected boron nitride/carbon nanofiber hybrid network within polymer composite for thermal conductivity improvement显示文摘With the increasing power density and integration of electronic devices,polymeric composites with high thermal conductivity(TC)are in urgent demand for solving heat accumulation issues.However,the direct introduction of inorganic fillers into a polymer matrix at low filler content usually leads to low TC enhancement.In this work,an interconnected three-dimensional(3D)polysulfone/hexagonal boron nitride-carbon nanofiber(PSF/BN-CNF)skeleton was prepared via the salt templated method to address this issue.After embedding into the epoxy(EP),the EP/PSF/BN-CNF composite presents a high TC of 2.18 W m^(−1) K^(−1) at a low filler loading of 28.61 wt%,corresponding to a TC enhancement of 990%compared to the neat epoxy.The enhanced TC is mainly attributed to the fabricated 3D interconnected structure and the efficient synergistic effect of BN and CNF.In addition,the TC of the epoxy composites can be further increased to 2.85 W m^(−1) K^(−1) at the same filler loading through a post-heat treatment of the PSF/BN-CNF skeletons.After carbonization at 1500°C,the adhesive PSF was converted into carbonaceous layers,which could serve as a thermally conductive glue to connect the filler network,further decreasing the interfacial thermal resistance and promoting phonon transport.Besides,the good heat dissipation performance of the EP/C/BN-CNF composites was directly confirmed by thermal infrared imaging,indicating a bright and broad application in the thermal management of modern electronics and energy fields.Yexiang Cui Fei Xu Di Bao Yueyang Gao Jianwen Peng Dan Lin Haolei Geng Xiaosong Shen Yanji Zhu Huaiyuan Wang 2023Journal of Materials Science & Technology2023,,16:0
18Reinforced Lewis covalent bond by twinborn nitride heterostructure for lithium-sulfur batteries显示文摘The practical application of lithium-sulfur(Li-S)batteries,as promising next-generation batteries,is hindered by their shuttle effect and the slow redox kinetics.Herein,a tungsten and molybdenum nitride heterostructure functionalized with hollow metal-organic framework-derived carbon(W_(2)N/Mo_(2)N)was proposed as the sulfur host.The hollow spherical structure provides storage space for sulfur,enhances electrical conductivity,and inhibits volume expansion.The metal atoms in the nitrides bonded with lithium polysulfides(Li PSs)through Lewis covalent bonds,enhancing the high catalytic activity of the nitrides and effectively reducing the energy barrier of Li PSs redox conversion.Moreover,the high intrinsic conductivity of nitrides and the ability of the heterostructure interface to accelerate electron/ion transport improved the Li+transmission.By leveraging the combined properties of strong adsorption and high catalytic activity,the sulfur host effectively inhibited the shuttle effect and accelerated the redox kinetics of Li PSs.High-efficiency Li+transmission,strong adsorption,and the efficient catalytic conversion activities of Li PSs in the heterostructure were experimentally and theoretically verified.The results indicate that the W_(2)N/Mo_(2)N cathode provides stable,and long-term cycling(over 2000 cycles)at 3 C with a low attenuation rate of 0.0196%per cycle.The design strategy of a twinborn nitride heterostructure thus provides a functionalized solution for advanced Li-S batteries.Yaochen Song Pengkai Tang Yanjie Wang Yi Wang Linnan Bi Qi Liang Liang He Qingyu Xie Yiyong Zhang Peng Dong Yingjie Zhang Yao Yao Jiaxuan Liao Sizhe Wang 2024Journal of Energy Chemistry2024,88,1:0
19Effects of in-situZrB_2 nanoparticles and scandium on microstructure and mechanical property of 7N01 aluminum alloy显示文摘In this study, the in-situ synthesized ZrB_(2) nanoparticles and rare earth Sc were introduced to enhance the strength and ductility of 7N01 aluminum alloy, via the generation of high-melting and uniform nanodispersoids. The microstructure and mechanical property evolution of the prepared composites and the interaction between ZrB_(2) and Sc were studied in detail. The microstructure investigation shows that the introduction of rare earth scandium(Sc) can promote the distribution of ZrB_(2) nanoparticles, by improving their wettability to the Al melt. Meanwhile, the addition of rare earth Sc also modifies the coarse Al Zn Mg Mn Fe precipitated phases, refines the matrix grains and generates high-melting Al_3(Sc,Zr)/Al_3Sc nanodispersoids. Tensile tests of the composites show that with the combinatorial introduction of ZrB_(2) and Sc, the strength and ductility of the composites are improved simultaneously compared with the corresponding 7N01 alloy, ZrB_(2) /7N01 composite and Sc/7N01 alloy. And the optimum contents of ZrB_(2) and Sc are 3 wt% and 0.2 wt% in this study. The yield strength, ultimate strength and elongation of(3 wt% ZrB_(2) +0.2 wt% Sc)/7N01 composite are 477 MPa, 506 MPa and 9.8%, increased about 18.1%, 12.2%and 38% compared to 7N01 alloy. Furthermore, the cooperation strengthening mechanisms of ZrB_(2) and Sc are also discussed.Xizhou Kai Yuhui Wang Ruikun Chen Yanjie Peng Anjun Shi Ran Tao Xiangfeng Liang Guirong Li Gang Chen Xiaojing Xu Yutao Zhao 2024Journal of Rare Earths2024,42,3:0
20Protective effects of gastrodine on dendritic spines in kainic acid-injured neurons显示文摘EphB2 affects neuronal cells by altering the dendritic spines. The present study analyzed the neu-roprotective effects of gastrodine by measuring EphB2 expression in rat neural cells cultured in vitro and injured by kainic acid. Gastrodine (12.5, 25, and 50 mg/L) improved morphology in kainic acid-injured neurons, reduced lactate dehydrogenase leakage, decreased neuronal apoptosis, and increased EphB2 expression in neuronal cells. A moderate dose of 25 mg/L gastrodine resulted in the most significant effects. These results suggested that gastrodine suppressed the neurotoxic effects of excitatory amino acids and provided neuroprotection by remodeling neuronal dendritic spines.Yangfei Ji Boai Zhang Yanjie Jia Guifang Sun Yu Liu Tao Peng Yanru Liu Xingrong Ma 2011Neural Regeneration Research2011,6,36:0
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