检索结果-南通市图书馆

Exercise preconditioning alleviates ischemia-induced memory deficits by increasing circulating adiponectin

Neural Regeneration Research 2025年第5期20卷 1445-1454页

作者： Meifeng Zheng Borui Zhang Sonata S Y Yau Kwok-Fai So Li Zhang Haining Ou Department of Rehabilitation Medicine Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina Department of Rehabilitation Medicine The Fifth Clinical College of Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina Key Laboratory of CNS Regeneration(Ministry of Education) Guangdong-Hong Kong-Macao Institute of CNS RegenerationJinan UniversityGuangzhouGuangdong ProvinceChina Department of Rehabilitation sciences The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina State Key Laboratory of Brain and Cognitive science Li Ka Shing Faculty of MedicineThe University of Hong KongHong Kong Special Administrative RegionChina Center for Exercise and Brain science School of PsychologyShanghai University of SportShanghaiChina Neuroscience and Neurorehabilitation Institute University of Health and Rehabilitation SciencesQingdaoShandong ProvinceChina

Cerebral ischemia is a major health risk that requires preventive approaches in addition to drug *** exercise enhances neurogenesis and synaptogenesis,and has been widely used for functional rehabilitation after *** this study,we determined whether exercise training before disease onset can alleviate the severity of cerebral *** also examined the role of exercise-induced circulating factors in these *** mice were subjected to 14 days of treadmill exercise training before surgery for middle cerebral artery *** found that this exercise pre-conditioning strategy effectively attenuated brain infarct area,inhibited gliogenesis,protected synaptic proteins,and improved novel object and spatial memory *** analysis showed that circulating adiponectin plays a critical role in these preventive effects of *** activation of adiponectin receptors by Adipo Ron mimicked the effects of exercise,while inhibiting receptor activation abolished the exercise *** summary,our results suggest a crucial role of circulating adiponectin in the effects of exercise pre-conditioning in protecting against cerebral ischemia and supporting the health benefits of exercise.

关键词： adiponectin cerebral ischemia exercise pre-conditioning hippocampus memory function middle cerebral artery occlusion prefrontal cortex synaptic proteins treadmill exercise

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

Synthesis and Efficiency of a SphericalMacroporous Epoxy-dicyandiamide ChelateResin for Preconcentrating and SeparatingTrace Au, Hg, Pd and Ru from Samples

引用

Chemical Research in Chinese Universities 2001年第2期17卷 168-174页

作者： GONG Bo-lin, LI Xue-qiang and WANG Feng-rong (Department of Chemistry, ningxia University, Yinchuan 750021, China) CHANG Xi-jun (Department of Chemistry, Lanzhou University, Lanzhou 730000, China) ningxia Univ Dept Chem Yinchuan 750021 Peoples R China Lanzhou Univ Dept Chem Lanzhou 730000 Peoples R China

A novel spherical macroporous epoxy-dicyandiamide chelate resin was synthesized simply and rapidly from epoxy resin and used for the preconcentration and separation of trace amounts of Au (Ⅲ ), Hg (Ⅱ ), Pd (Ⅳ) and Ru (Ⅲ) ions from solution samples. The analyzed ions can be quantitatively concentrated by the resin at a flow rate of 2. 0 mL/min at pH 4, and can also be desorbed with 15 mL of 4 mol/L HCl + 0. 3 g thiourea from the resin column with recoveries of 96. 5%-99. 0%. After the chelate resin was reused for 7 times, the recoveries of these ions were still over 92%, and 400-1 000 times of excess of Fe(Ⅲ ), Al(Ⅲ ), Ni( II), Mn( Ⅱ ), Cr (Ⅲ ), Cu ( Ⅱ ), Cd (Ⅱ ) and Pb (Ⅱ ) caused little interference with the determination of these ions by an inductively coupled plasma optical emission spectrometer (ICP-OES ). The capacities of the resin for the analytes are in the range of 0. 35~0. 92 mmol/g. The RSDs of the proposed method are in the range of 1. 1 % ~4. 0% for each kind of the analyzed ions. The recoveries of a standard added in real solution samples are between 96. 5% and 98. 5%, and the results for the analyzed ions in a powder sample are in good agreement with their reported values.

关键词： Concentration Separation Macroporous epoxy-dicyandiamide chelate resin Gold Mercury Palladium and ruthenium.

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

Semisolid microstructural evolution of (CNTs+Sip)/AZ91D powder compacts prepared from powders by cold pressing and remelting

引用

Rare Metals 2020年第6期39卷 733-742页

作者： Pu-Bo Li Wan-Ting Tan Mang-Mang Gao Kuan-Guan Liu ningxia Key Laboratory of Photovoltaic Materials Ningxia UniversityYinchuan 750021China

The evolution of semisolid microstructure during partial remelting of(CNTs+Sip)/AZ91 D powder compacts prepared by cold pressing was *** results indicate that rapid grain coarsening is driven by the dissolution of eutecticβphase material during the initial heating period of 0-10 min,so the AZ91 D powders with fine equiaxed grains surrounded by intergranular eutectic phases evolve into compact *** the heating time proceeds,α-Mg particles were gradually separated by liquid due to the phase transformations ofα-Mg+β→L andα-Mg→*** primary particles coarsened rather slowly and the as-received Mg powder evolved into nearly spheroidal particles surrounded by liquid phase after partial *** in situ synthesized Mg2 Sip were distributed homogeneously around the CNTs with maintained structural integrity during partial ***,this microstructural evolution was accompanied by densification through pore *** ideal semisolid ingot suitable for thixoforming can therefore be obtained by partially remelting a(CNTs+Sip)/Mg powder compact.

关键词： Semisolid microstructural evolution Densification Phase transformation Coarsening behavior

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

Heat Conduction in Multilayered Thermoelectric Materials with Multiple Cracks

引用

Acta Mechanica Solida Sinica 2018年第4期31卷 512-522页

作者： Shenghu Ding Yueting Zhou School of Mathematics and Statistics Ningxia University Yinchuan 750021 China School of Aerospace Engineering and Applied Mechanics Tongji University Shanghai 200092 China

Multilayer thin-film thermoelectric materials are of technological importance. This paper describes a method to analyze the heat conduction in a multilayered thermoelectric plate containing some non-collinear cracks. The material properties in one layer may be different from those in another even though each layer may still be homogeneous. Using the Fourier integral transforms, the boundary value problem is reduced to a system of general singular integral equations. The model is sufficiently general to account for any number of layers and any number of cracks. As a numerical illustration, the electric flux intensity factor, energy flux intensity factor and thermal flux intensity factor for a three-layer plate specimen with two cracks are presented. The effects of strip width on the electric flux intensity factor and thermal flux intensity factor are studied.

关键词： Multilayer Thermoelectric materials Crack Singular integral equation Intensityfactors

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Ground-active arthropod responses to rainfall-induced dune microhabitats in a desertified steppe ecosystem,China

引用

Journal of Arid Land 2016年第4期8卷 632-646页

作者： LIU Rentao ZHU Fan Yosef STEINBERGER Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwestern China of Ministry of Education Ningxia UniversityYinchuan 750021China The Mina&Everard Goodman Faculty of Life sciences Bar Ilan UniversityRamat-Gan 52900Israel

Different microhabitats along dune slope were found to affect the distribution of plant performances and soil properties in desertified ecosystems. However, the ground-active arthropod responses to rainfall-induced dune microhabitats were largely unknown in desertified regions. At dune top, midslope and bottom, ground-active arthropods were sampled by the method of pitfall traps in addition to the herbaceous and soil measurements during spring, summer and autumn from 2012 to 2013. Ground-active arthropod had a strong dynamics in time, seasonally and yearly in responses to rainfall-induced dune microhabitats and the variations were significant higher than those of soil and herbaceous properties. The abundance distribution of dominant taxa （i.e. Melolonthidae, Carabidae, Glaphyridae, Tenebrionidae and Formicidae families） among dune microhabitats was similar between seasons within the same year, whereas they differed markedly between two sampling years with varying rainfall patterns. A significant （P〈0.05） difference in total abundance, taxa richness and Shannon index among dune microhabitats was found only in certain season time, particularly in 2013; however, no significant （P〉0.05） differences were found among dune microhabitats when averaged on three sampling seasons within the year of either 2012 or 2013. In all, the taxonomical structure differed considerably from the community structure in ground-active arthropod response to rainfall-induced dune microhabitats. The spatial distribution of taxonomical groups among dune microhabitats was significantly affected by inter-annual rainfall changes, whereas that of community structure was affected by both intra- and inter-annual rainfall changes in desertified ecosystems.

关键词： ground-active arthropod spatial distribution desertified region dune microhabitat rainfall change

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

Effect of Al_(2)O_(3)/CaO on the melting and mineral transformation of Ningdong coal ash

引用

Chinese Journal of Chemical Engineering 2020年第12期28卷 3110-3116页

作者： Feng Wang Min Yao Haoyong Kan Jianping Kuang Ping Li Jiashuo Zhang Yixin Zhang State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering College of Chemistry and Chemical EngineeringNingxia UniversityYinchuan 750021China ningxia Shenyao Technology Co.Ltd. Yinchuan 750000China China University of Mining and Technology Xuzhou 221116China

Coal ash melting characteristics has a direct impact on the smooth operation of entrained *** conversion of coal ash is very significant to be investigated,because the mineral can affect the melting temperature and viscosity under high temperature *** this paper,the effects of different Al2O3/CaO on the mineral conversion,melting temperature and viscosity of Ningdong coal ash are studied by the combination of experiment and *** trend of melting temperature decreases firstly and rises with increasing Al_(2)O_(3)/*** ashmelting point reached to the lowestwhen the ratio is *** and Factsage software are used to analyze crystallization behavior of *** results showthat the content of anorthite,albite and corundumincreases and subsequently decreases,while the content of mullite decreases firstly and then rises with increasing Al_(2)O_(3)/*** content with CaO can contribute to form albite and anorthite of ***,high content with Al_(2)O_(3) can tend to produce mullite of *** results of experimental and simulation are basically the same,which lays a foundation for the melting characteristics of Ningdong coal ash and can provide technical support for the smooth operation of the entrained-gasifier.

关键词： Melting characteristics Viscosity Mineral transformation Al_(2)O_(3)/CaO

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

Surface effect on band structure of magneto-elastic phononic crystal nanoplates subject to magnetic and stress loadings

引用

Applied Mathematics and Mechanics(English Edition) 2022年第2期43卷 203-218页

作者： Shunzu ZHANG Qianqian HU Wenjuan ZHAO School of Civil and Hydraulic Engineering Ningxia UniversityYinchuan750021China

This paper presents a theoretical model for the size-dependent band structure of magneto-elastic phononic crystal(PC)nanoplates according to the Kirchhoff plate theory and Gurtin-Murdoch theory,in which the surface effect and magneto-elastic coupling are *** introducing the nonlinear coupling constitutive relation of magnetostrictive materials,Terfenol-D/epoxy PC nanoplates are carried out as an example to investigate the dependence of the band structure on the surface effect,magnetic field,pre-stress,and geometric *** results show that the surface effect has promotive influence on dispersion curves of the band structure,and the band gaps can be improved gradually with the increase in the material intrinsic ***,the band gaps exhibit obvious nonlinear coupling characteristics owing to the competition between the magnetic field and the *** considering the surface effect and magneto-elastic coupling,the open and closed points of band gaps are found when the lattice constant to thickness ratio *** study may provide a method for flexible tunability of elastic wave propagation in magneto-elastic PC nanoplates and functional design of highperformance nanoplate-based devices.

关键词： magneto-elastic phononic crystal nanoplate surface effect magnetic field band gap

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

Structural properties and catalytic performance of the La-Cu-Zn mixed oxides for CO2 hydrogenation to methanol

引用

Journal of Rare Earths 2018年第3期36卷 273-280页

作者： Haijuan Zhan Zhiqiang Wu Ning Zhao Wanyi Liu Wei Wei School of Chemistry and Chemical Engineering Ningxia UniversityYinchuan 750021China State Key Laboratory of High-efficiency Coal Utilization and Green Chemistry Engineering Ningnia UniversityYinchuan 750021China State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SdencesTaiyuan 030001China Center for Greenhouse Gas and Environmental Engineering Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201203China

A series of La-Cu-Zn-O mixed oxide catalysts were synthesized by a co-precipitation method and calcined under different temperatures. The XRD, BET, TPR, N2 O-adsorption, XPS, SEM and TPD techniques were carried out to measure the aimed catalysts. The results indicated that the chemical environment of lanthanum element changes with the increase of calcination temperature. The La2 CuO4 perovskite structure is obtained at the temperature higher than 823 K and the special copper species appear in the perovskites due to the special structure property. The catalysts with La2 CuO4 perovskite structure show higher methanol selectivity compared with the mixed copper catalyst. For the perovskite catalysts, the conversion of CO2 changes with the same tendency of the copper species ratio（（Cu^（α＋）＋Cu^0）/（Cu（Total））%）, which implied both Cu^（α＋） and Cu^0 are important active sites in the perovskite catalyst for the reaction.

关键词： La2CuO4 perovskite CO2 hydrogenation Rare earths

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

Downlink energy efficiency modeling and optimization with backhaul awareness and interference price in ultra cellular HetNet

引用

The Journal of China Universities of Posts and Telecommunications 2019年第2期26卷 67-81页

作者： Li Bo Sun Xuehong Li Chunshu Xue Kaiping Zhang Xiaoguang ningxia Key Laboratory of Intelligent Sensing for Desert Information Ningxia UniversityYinchuan 750021China Department of Electronic Engineering and Information science University of Science and Technology of ChinaHefei 230026China Academy of Opto-Electronics Chinese Academy of SciencesBeijing 100080China

The cellular heterogeneous network(HetNet) with ultra dense small cells is called ultra cellular *** energy efficiency for this network is very important for future green wireless *** data rates and power consumptions for three parts(i.e.,macro cells,small cells,and mixed backhaul links) in ultra cellular HetNet are jointly formulated to model downlink energy efficiency considering the active base stations(BSs) and inactive ***,in order to decrease the downlink co-channel interference,the interference price functions are also jointly set up for the three parts in ultra cellular ***,energy efficiency optimization iterative algorithm scheme using the fractional programming and Lagrangian multiplier with constraints for density of ultra dense small cells and fraction of mixed backhaul links is presented with interference *** convergence and computation complexity are also proved in this *** numerical simulations finally demonstrate convergence behavior of the proposed *** comparison,some conclusion can be *** energy efficiency of system is lower as the density of small cell is *** effect on maximizing energy efficiency with interference price outperforms that without interference *** the energy efficiency increases as the fraction of mixed backhaul links is higher because of more power consumption in the microwave backhaul links.

关键词： ultra cellular energy efficiency optimization backhaul link interference price

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

A New Co(Ⅱ)Coordination Compound Constructed by Tripyridyltriazole and Pyromellitic Acid:Synthesis,Crystal Structure and Antifungal Activity

引用

Chinese Journal of Structural Chemistry 2017年第1期36卷 33-39页

作者：任建林靳晓东邱静茹梁宏姣李冰 Department of Chemistry and Chemical Engineering Ningxia University

A new coordination compound, [Co（L223）2（H2O）2]·H2pm（1, L223 = 3,4-bis（2-pyridyl）-5-（3-pyridyl）-1,2,4-triazole and H4 pm = pyromellitic acid）, has been synthesized. The structure of complex 1 has been characterized by X-ray single-crystal diffraction, elemental analysis, IR spectrum analysis and thermogravimetric analysis. Single-crystal X-ray diffraction analysis reveals that complex 1 belongs to the triclinic system, space group P1 with a = 10.2470（8）, b = 10.2879（9）, c = 10.2951（11）？, α = 109.398（2）, β = 97.6590（10）, γ = 95.3260（10）°, V = 1003.60（16）？3, Z = 1, Dc = 1.565 g/cm^3, μ = 0.508 mm%^-1, Mr = 945.73, F（000） = 485, the final R = 0.0562 and w R = 0.0783 with I 〉 2σ（I）. Two L223 as chelating ligands link one Co（II） ion to form a 0D motif. Furthermore, the 0D motifs are linked into a 2D coordination pattern with hydrogen bonds. In addition, the antifungal effects of the ligand and the complex were evaluated by the disc diffusion method against Colletotrichum gloeosporioides Penz. 1 represents antifungal activity with high levels of inhibitory potency which is larger than the corresponding ligand.

关键词： 3 4-bis(2-pyridyl)-5-(3-pyridyl)-1 2 4-triazole crystal structure thermogravimetric analysis antifungal activity

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：