检索结果-南通市图书馆

Gamma-glutamyl transferase 5 overexpression in cerebrovascular endothelial cells improves brain pathology,cognition,and behavior in APP/PS1 mice

引用

Neural Regeneration Research 2025年第2期20卷 533-547页

作者： Yanli zhang Tian Li Jie Miao Zhina zhang Mingxuan Yang Zhuoran Wang Bo Yang Jiawei zhang Haiting Li Qiang Su Junhong guo Department of Neurology First Hospital of Shanxi Medical UniversityTaiyuanShanxi ProvinceChina Department of Neurology Sixth Hospital of Shanxi Medical University(General Hospital of Tisco)TaiyuanShanxi ProvinceChina Department of Physiology Key Laboratory of Cellular PhysiologyMinistry of EducationShanxi Medical UniversityTaiyuanShanxi ProvinceChina Department of Hernia and Abdominal Wall Surgery Shanxi Bethune HospitalShanxi Academy of Medical SciencesTongji Shanxi HospitalThird Hospital of Shanxi Medical UniversityTaiyuanShanxi ProvinceChina Department of Laboratory Medicine of Fenyang College Shanxi Medical UniversityFenyangShanxi ProvinceChina

In patients with Alzheimer’s disease,gamma-glutamyl transferase 5(GGT5)expression has been observed to be downregulated in cerebrovascular endothelial ***,the functional role of GGT5 in the development of Alzheimer’s disease remains *** study aimed to explore the effect of GGT5 on cognitive function and brain pathology in an APP/PS1 mouse model of Alzheimer’s disease,as well as the underlying *** observed a significant reduction in GGT5 expression in two in vitro models of Alzheimer’s disease(Aβ_(1-42)-treated hCMEC/D3 and bEnd.3 cells),as well as in the APP/PS1 mouse ***,injection of APP/PS1 mice with an adeno-associated virus encoding GGT5 enhanced hippocampal synaptic plasticity and mitigated cognitive ***,increasing GGT5 expression in cerebrovascular endothelial cells reduced levels of both soluble and insoluble amyloid-βin the brains of APP/PS1 *** effect may be attributable to inhibition of the expression ofβ-site APP cleaving enzyme 1,which is mediated by nuclear factor-kappa *** findings demonstrate that GGT5 expression in cerebrovascular endothelial cells is inversely associated with Alzheimer’s disease pathogenesis,and that GGT5 upregulation mitigates cognitive deficits in APP/PS1 *** findings suggest that GGT5 expression in cerebrovascular endothelial cells is a potential therapeutic target and biomarker for Alzheimer’s disease.

关键词： Alzheimer’s disease amyloid-β APP/PS1 mice cerebrovascular endothelial cells cognitive deficits gamma-glutamyl transferase 5 neurovascular unit nuclear factor‐kappa B synaptic plasticity β-site APP cleaving enzyme 1

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effects of the extrusion parameters on microstructure,texture and room temperature mechanical properties of extruded Mg-2.49Nd-1.82Gd-0.2Zn-0.2Zr alloy

引用

International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 136-146页

作者： Chenjin zhang Guangyu Yang Lei Xiao Zhiyong Kan Jing guo Qiang Li Wanqi Jie State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China College of Materials Science and Engineering Fuzhou UniversityFuzhou 350108China College of Chemistry and Environmental Science Qujing Normal UniversityQujing 655011China

Microstructure,texture,and mechanical properties of the extruded Mg-2.49Nd-1.82Gd-0.2Zn-0.2Zr alloy were investigated at different extrusion temperatures(260 and 320℃),extrusion ratios(10:1,15:1,and 30:1),and extrusion speeds(3 and 6 mm/s).The experimental results exhibited that the grain sizes after extrusion were much finer than that of the homogenized alloy,and the second phase showed streamline distribution along the extrusion direction(ED).With extrusion temperature increased from 260 to 320℃,the microstructure,texture,and mechanical properties of alloys changed *** dynamic recrystallization(DRX)degree and grain sizes enhanced as the extrusion ratio increased from 10:1 to 30:1,and the strength gradually decreased but elongation(EL)*** the extrusion speed increased from 3 to 6 mm/s,the grain sizes and DRX degree increased significantly,and the samples presented the typical-rare-earth(RE)*** alloy extruded at 260℃ with extrusion ratio of 10:1 and extrusion speed of 3 mm/s showed the tensile yield strength(TYS)of 213 MPa and EL of 30.6%.After quantitatively analyzing the contribution of strengthening mechanisms,it was found that the grain boundary strengthening and dislocation strengthening played major roles among strengthening *** results provide some guidelines for enlarging the industrial application of extruded Mg-RE alloy.

关键词： Mg-rare earth alloys extrusion temperature extrusion ratio extrusion speed strengthening mechanisms

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

光学微操纵过程的轴平面显微成像技术

引用

物理学报 2017年第1期66卷 42-48页

作者：安莎彭彤周兴韩国霞黄张翔于湘华蔡亚楠姚保利张鹏中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室西安710119 中国科学院大学北京100049

光学俘获技术利用光与物质相互作用产生的光势阱效应来实现对微粒的操控,已经成功应用于生物医学、材料科学等交叉领域.在对微粒进行三维俘获时,传统的宽场光学显微技术只能观测到某一平面内微粒的横向运动,对微粒沿轴向运动的观测受到... 详细信息

光学俘获技术利用光与物质相互作用产生的光势阱效应来实现对微粒的操控,已经成功应用于生物医学、材料科学等交叉领域.在对微粒进行三维俘获时,传统的宽场光学显微技术只能观测到某一平面内微粒的横向运动,对微粒沿轴向运动的观测受到很大限制.本文将轴平面显微成像技术引入光学微粒操控研究中,利用45?倾斜的反射镜把微粒的轴向运动信息转换到横向平面进行观测,与传统宽场显微成像技术相结合,实现了对二氧化硅小球俘获过程横向和轴向运动的同步观测.该成像方法无需扫描和数据重构,具有实时快速等优点,在新型光束光镊、厚样品三维观测和成像等领域具有潜在的应用价值.

关键词：轴平面成像光学微操纵光学俘获光学显微成像

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Desolvation-Driven 100-Fold Tunneling Relaxation Slow-down in Co（Ⅱ）-Dy（Ⅲ） Single-Molecule Magnets

Desolvation-Driven 100-Fold Tunneling Relaxation Slow-down i...

引用

中国化学会第九届全国无机化学学术会议

作者： guo-zhang huang Jun-Liang Liu Jie-Yi Wu Yan-Cong Chen Jian-Hua Jia Liviu Ungur Liviu F.Chibotaru Ming-Liang Tong Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of Chemistry and Chemical EngineeringSun Yat-Sen University Theory of Nanomaterials Group and INPAC – Institute of Nanoscale Physics and Chemistry Katholieke Universiteit LeuvenCelestijnenlaan 200F

Single-molecule magnets（SMMs）are regarded as a class of promising materials for spintronic and ultrahigh-density storage *** the magnetic dynamics of single-molecule magnets is a crucial challenge for chemists[1,2].Lanthanide ions are not only highly magnetically anisotropic but also highly sensitive to changes in the coordination *** developed a feasible approach to understand parts of the magneto-structure correlations and propose to regulate the relaxation behaviors via rational design.A series of Co（Ⅱ）-Dy（Ⅲ）-Co（Ⅱ）complexes were obtained using in situ synthesis;in this system of complexes,the relaxation dynamics can be greatly improved,accompanied with desolvation,via single-crystal to single-crystal *** effective energy barrier can be increased from 293 cm-1（422 K）to 416 cm-1（600 K）,and the tunneling relaxation time can be grown from 8.5×10-4 s to 7.4×10-2 *** remarkable improvements are due to the change in the coordination environments of Dy（Ⅲ）and Co（Ⅱ）.Ab initio calculations were performed to better understand the magnetic dynamics.

关键词： Single-molecule magnets tunneling relaxation magneto-structure correlations ab initio calculations

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

设置粘滞阻尼器的RC框架结构节点内力控制与减震分析

引用

建筑科学 2017年第7期33卷 78-84页

作者：郭镪文张永山黄文成广州大学土木工程学院广东广州510006

针对某4层RC框架结构部分节点核心区剪力设计值与层间位移角不满足规范要求的问题,引入消能减震技术对结构进行减震控制。首先,采用随机平均法对非线性粘滞阻尼器进行等效线性化,进一步基于YJK和ETABS软件平台采用振型分解反应谱法和时... 详细信息

针对某4层RC框架结构部分节点核心区剪力设计值与层间位移角不满足规范要求的问题,引入消能减震技术对结构进行减震控制。首先,采用随机平均法对非线性粘滞阻尼器进行等效线性化,进一步基于YJK和ETABS软件平台采用振型分解反应谱法和时程分析法对等效线性化前后的结构模型进行分析,研究了结构节点内力、层间位移角和楼层剪力的变化情况。结果表明:结构增设粘滞阻尼器后,能有效减小结构节点内力、层间位移角和楼层剪力,使其在地震作用下满足规范要求,结构整体抗震性能得到有效改善;随机平均法可用于非线性粘滞阻尼器的等效线性化,等效线性化前后结构节点内力相差很小。

关键词： RC框架结构节点核心区消能减震技术粘滞阻尼器等效线性化

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Longitudinal assessment of peripheral organ metabolism and the gut microbiota in an APP/PS1 transgenic mouse model of Alzheimer’s disease

引用

Neural Regeneration Research 2025年第10期20卷 2982-2997页

作者： Hongli Li Jianhua huang Di Zhao Lemei Zhu Zheyu zhang Min Yi Weijun Peng Department of Integrated Traditional Chinese&Western Medicine The Second Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina National Clinical Research Center for Metabolic Diseases ChangshaHunan ProvinceChina Hunan Academy of Chinese Medicine ChangshaHunan ProvinceChina Academician Workstation Changsha Medical UniversityChangshaHunan ProvinceChina

Alzheimer’s disease not only affects the brain,but also induces metabolic dysfunction in peripheral organs and alters the gut *** aim of this study was to investigate systemic changes that occur in Alzheimer’s disease,in particular the association between changes in peripheral organ metabolism,changes in gut microbial composition,and Alzheimer’s disease *** do this,we analyzed peripheral organ metabolism and the gut microbiota in amyloid precursor protein-presenilin 1(APP/PS1)transgenic and control mice at 3,6,9,and 12 months of ***-month-old APP/PS1 mice exhibited cognitive impairment,Alzheimer’s disease-related brain changes,distinctive metabolic disturbances in peripheral organs and fecal samples(as detected by untargeted metabolomics sequencing),and substantial changes in gut microbial composition compared with younger APP/PS1 ***,a strong correlation emerged between the gut microbiota and kidney metabolism in APP/PS1 *** findings suggest that alterations in peripheral organ metabolism and the gut microbiota are closely related to Alzheimer’s disease development,indicating potential new directions for therapeutic strategies.

关键词： Alzheimer’s disease APP/PS1 mice brain-kidney axis gut microbiota heart-brain axis liver-brain axis lung-brain axis microbiota-gut-brain axis peripheral organ metabolism spleen-brain axis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Integration of Electrical Properties and Polarization Loss Modulation on Atomic Fe–N‑RGO for Boosting Electromagnetic Wave Absorption

引用

Nano-Micro Letters 2025年第2期17卷 517-532页

作者： Kaili zhang Yuefeng Yan Zhen Wang Guansheng Ma Dechang Jia Xiaoxiao huang Yu Zhou State Key Laboratory of Precision Welding&Joining of Materials and Structures Harbin Institute of TechnologyHarbin 150001People’s Republic of China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001People’s Republic of China MIIT Key Laboratory of Advanced Structural‑Functional Integration Materials&Green Manufacturing Technology Harbin Institute of TechnologyHarbin 150001People’s Republic of China

Developing effective strategies to regulate graphene’s conduction loss and polarization has become a key to expanding its application in the electromagnetic wave absorption(EMWA)*** on the unique energy band structure of graphene,regulating its bandgap and electrical properties by introducing heteroatoms is considered a feasible ***,metal-nitrogen doping reduced graphene oxide(M–N-RGO)was prepared by embedding a series of single metal atoms M–N_(4) sites(M=Mn,Fe,Co,Ni,Cu,Zn,Nb,Cd,and Sn)in RGO using an N-coordination atom-assisted *** composites had adjustable conductivity and polarization to optimize dielectric loss and impedance matching for efficient EMWA *** results showed that the minimum reflection loss(RL_(min))of Fe–N-RGO reaches−74.05 dB(2.0 mm)and the maximum effective absorption bandwidth(EAB_(max))is 7.05 GHz(1.89 mm)even with a low filler loading of only 1 wt%.Combined with X-ray absorption spectra(XAFS),atomic force microscopy,and density functional theory calculation analysis,the Fe–N_(4) can be used as the polarization center to increase dipole polarization,interface polarization and defect-induced polarization due to d-p orbital hybridization and structural ***,electron migration within the Fe further leads to conduction loss,thereby synergistically promoting energy *** study demonstrates the effectiveness of metal-nitrogen doping in regulating the graphene′s dielectric properties,which provides an important basis for further investigation of the loss mechanism.

关键词： Electromagnetic wave absorption Fe-N-RGO Dipole polarization Conduction loss Impedance matching

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Maintaining moderate levels of hypochlorous acid promotes neural stem cell proliferation and differentiation in the recovery phase of stroke

引用

Neural Regeneration Research 2025年第3期20卷 845-857页

作者： Lin-Yan huang Yi-De zhang Jie Chen Hai-Di Fan Wan Wang Bin Wang Ju-Yun Ma Peng-Peng Li Hai-Wei Pu Xin-Yian guo Jian-Gang Shen Su-Hua Qi School of Medical Technology Xuzhou Key Laboratory of Laboratory DiagnosticsXuzhou Medical UniversityXuzhouJiangsu ProvinceChina School of Pharmacy Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina Department of Laboratory Medicine Branch Hospital of Huai’an First People’s HospitalHuai’anJiangsu ProvinceChina Department of Laboratory Medicine the Affiliated Hospital of Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina School of Chinese Medicine The University of Hong KongHong Kong Special Administrative RegionChina

It has been shown clinically that continuous removal of ischemia/reperfusion-induced reactive oxygen species is not conducive to the recovery of late ***,previous studies have shown that excessive increases in hypochlorous acid after stroke can cause severe damage to brain *** previous studies have found that a small amount of hypochlorous acid still exists in the later stage of stroke,but its specific role and mechanism are currently *** simulate stroke in vivo,a middle cerebral artery occlusion rat model was established,with an oxygen-glucose deprivation/reoxygenation model established in vitro to mimic *** found that in the early stage(within 24 hours)of ischemic stroke,neutrophils produced a large amount of hypochlorous acid,while in the recovery phase(10 days after stroke),microglia were activated and produced a small amount of hypochlorous ***,in acute stroke in rats,hypochlorous acid production was prevented using a hypochlorous acid scavenger,taurine,or myeloperoxidase inhibitor,4-aminobenzoic acid *** results showed that high levels of hypochlorous acid(200μM)induced neuronal apoptosis after oxygen/glucose deprivation/***,in the recovery phase of the middle cerebral artery occlusion model,a moderate level of hypochlorous acid promoted the proliferation and differentiation of neural stem cells into neurons and *** suggests that hypochlorous acid plays different roles at different phases of cerebral ischemia/reperfusion *** levels of hypochlorous acid(5 and 100μM)promoted nuclear translocation ofβ-*** transfection of single-site mutation plasmids,we found that hypochlorous acid induced chlorination of theβ-catenin tyrosine 30 residue,which promoted nuclear ***,our study indicates that maintaining low levels of hypochlorous acid plays a key role in the recovery of neurological function.

关键词： cell differentiation cerebral ischemia/reperfusion injury chlorination hypochlorous acid microglia neural stem cell neurogenesis nuclear translocation stroke β-catenin

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Constructing Donor–Acceptor‑Linked COFs Electrolytes to Regulate Electron Density and Accelerate the Li^(+)Migration in Quasi‑Solid‑State Battery

引用

Nano-Micro Letters 2025年第1期17卷 456-471页

作者： Genfu Zhao Hang Ma Conghui zhang Yongxin Yang Shuyuan Yu Haiye Zhu Yongjiang Sun Hong guo School of Materials and Energy International Joint Research Center for Advanced Energy Materials of Yunnan ProvinceYunnan UniversityKunming 650091People’s Republic of China Yunnan Yuntianhua Co. LtdR&D CenterKunming 650228People’s Republic of China Southwest United Graduate School Kunming 650091People’s Republic of China

Regulation the electronic density of solid-state electrolyte by donor–acceptor(D–A)system can achieve highly-selective Li^(+)transportation and conduction in solid-state Li metal *** study reports a high-performance solid-state electrolyte thorough D–A-linked covalent organic frameworks(COFs)based on intramolecular charge transfer *** other reported COFbased solid-state electrolyte,the developed concept with D–A-linked COFs not only achieves electronic modulation to promote highly-selective Li^(+)migration and inhibit Li dendrite,but also offers a crucial opportunity to understand the role of electronic density in solid-state Li metal *** introduced strong electronegativity F-based ligand in COF electrolyte results in highlyselective Li^(+)(transference number 0.83),high ionic conductivity(6.7×10^(-4)S cm^(−1)),excellent cyclic ability(1000 h)in Li metal symmetric cell and high-capacity retention in Li/LiFePO_(4)cell(90.8%for 300 cycles at 5C)than substituted C-and N-based *** is ascribed to outstanding D–A interaction between donor porphyrin and acceptor F atoms,which effectively expedites electron transferring from porphyrin to F-based ligand and enhances Li^(+)***,we anticipate that this work creates insight into the strategy for accelerating Li^(+)conduction in high-performance solid-state Li metal batteries through D–A system.

关键词： Electronic modulation engineering Donor-acceptor-linked covalent organic frameworks Quasi-solid-state Li metal battery

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

血小板/淋巴细胞比值与维持性血液透析患者炎症状态的关系

引用

中国血液净化 2017年第7期16卷 459-462页

作者：张国娟黄雯首都医科大学附属北京同仁医院肾内科北京100730

目的探讨维持性血液透析(maintenance hemodialysis,MHD)患者血小板/淋巴细胞比值(platelet to lymphocyte ratio,PLR)与炎症的关系,为临床监测MHD患者体内的炎症状态提供一个新的指标。方法以72名稳定的MHD患者为观察对象,以22名健康... 详细信息

目的探讨维持性血液透析(maintenance hemodialysis,MHD)患者血小板/淋巴细胞比值(platelet to lymphocyte ratio,PLR)与炎症的关系,为临床监测MHD患者体内的炎症状态提供一个新的指标。方法以72名稳定的MHD患者为观察对象,以22名健康体检者为对照,检测血常规及血生化,应用SPSS17.0软件进行统计学分析,分析2组患者PLR等血液学指标之间的差异,根据PLR平均数将MHD患者分为2组,分析2组患者高敏C反应蛋白(high sensitivity C reactive protein,hs- CRP)、中性粒细胞/淋巴细胞比值(neutrophil to lymphocyte ratio,NLR)、血浆白蛋白(albumin,ALB)等指标之间的差异,采用spearman相关来分析PLR与NLR、hsCRP等的相关关系。结果 MHD患者血小板数及淋巴细胞数均显著低于正常对照组(t=5.903,P﹤0.001;t=12.914,P﹤0.001);而MHD患者PLR为116.01+41.49,显著高于正常对照组的75.31+19.44(t=-4.441,P﹤0.001);MHD患者NLR、hsCRP显著高于正常对照组(t=-6.731,P﹤0.001;t=-2.752,P=0.008)。MHD患者PLR平均数为116,PLR≥116组患者血小板数、PLR、NLR、hsCRP显著高于PLR<116组(t=-3.676,P=0.001;t=-9.81,P﹤0.001;t=-4.114,P﹤0.001;t=-2.352,P=0.022),淋巴细胞数显著低于PLR<116组(t=4.190,P﹤0.001)。MHD患者PLR与淋巴细胞数呈负相关(r=-0.574,P﹤0.001),与血小板数(r=0.516,P﹤0.001)、NLR(r=0.625,P﹤0.001)、hsCRP(r=0.251,P=0.036)呈正相关。结论 PLR可以作为一个反映MHD患者系统炎症的新指标。

关键词：维持性血液透析血小板/淋巴细胞比值炎症

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：