检索结果-南通市图书馆

Hemorrhagic transformation in patients with large-artery atherosclerotic stroke is associated with the gut microbiota and lipopolysaccharide

引用

Neural Regeneration Research 2024年第7期19卷 1532-1540页

作者： Qin Huang Minping Wei Xianjing Feng Yunfang Luo yunhai liu Jian Xia Department of Neurology Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Department of Neurology Peking University People’s HospitalBeijingChina Clinical Research Center for Cerebrovascular Disease of Hunan Province Central South UniversityChangshaHunan ProvinceChina National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina

Hemorrhagic transformation is a major complication of large-artery atheroscle rotic stroke(a major ischemic stro ke subtype)that wo rsens outcomes and increases *** of the gut microbiota is an important feature of stroke,and some specific bacteria and bacterial metabolites may contribute to hemorrhagic transformation *** aimed to investigate the relationship between the gut microbiota and hemorrhagic transformation in largearte ry atheroscle rotic stro *** observational retrospective study was *** May 2020 to September 2021,blood and fecal samples were obtained upon admission from 32 patients with first-ever acute ischemic stroke and not undergoing intravenous thrombolysis or endovascular thrombectomy,as well as 16 healthy *** with stro ke who developed hemorrhagic transfo rmation(n=15)were compared to those who did not develop hemorrhagic transformation(n=17)and with healthy *** gut microbiota was assessed through 16S ribosomal ribonucleic acid *** also examined key components of the lipopolysaccharide pathway:lipopolysaccharide,lipopolysaccharide-binding protein,and soluble *** observed that bacterial diversity was decreased in both the hemorrhagic transformation and non-hemorrhagic transfo rmation group compared with the healthy *** patients with ischemic stro ke who developed hemorrhagic transfo rmation exhibited altered gut micro biota composition,in particular an increase in the relative abundance and dive rsity of members belonging to the Enterobacteriaceae *** lipopolysaccharide and lipopolysaccharide-binding protein levels were higher in the hemorrhagic transformation group compared with the non-hemorrhagic transfo rmation ***,lipopolysaccharide-binding protein,and soluble CD14 concentrations were associated with increased abundance of Enterobacte ***,the role of the gut microbiota in hemorrhagic transformation was evaluated using

关键词： gut microbiota hemorrhagic transformation inflammation lipopolysaccharide stroke

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

Synergistic effect of homojunction and Ohmic junctions in CdS boosting spatial charge separation for U(VI)photoreduction

引用

Nano Research 2024年第8期17卷 6849-6859页

作者： Haonan Pei Zhimin Dong Zifan Li Jian Huang Yuanping Jiang Zuojia Li Lin Xu Xiaohong Cao yunhai liu Zhibin Zhang Guoping Yang State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China

Photo-excited holes usually migrate to the surface of the catalyst and rapidly recombine with electrons,reducing the photocatalytic reduction efficiency of uranium(VI)(U(VI))in radioactive ***,we employed a straightforward synthesis technique to meticulously shape and manipulate the morphology of CdS to precisely construct CdS-Ni dandelion-like composites with different aspect ***,the introduction of crystal facet homojunction with Ohmic contacts in this unique morphology siqnificantly improves the photocatalytic ***-dependent photoluminescence spectroscopy(TD-PL)verifies that the composite material positively effects on the dissociation of *** 30 min,CdS(002)/(102)/Ni-4 removed 98% of the uranium content in solution and showed a rather high apparent rate constant(0.114 min^(−1)),which was 4.8 times higher than that of CdS nanospheres(NSs)(0.024 min^(−1))and 3.7 times higher than that of CdS nanorods(NRs)(0.031 min^(−1)).This is much higher the most reported photocatalysts for U(VI)*** after 5 consecutive cycles,the photocatalytic efficiency only decreased by 7%.This offers a fresh perspective on constructing a new perspective for building a green,efficient,and multi mechanism collaborative catalytic system to remediate environmental pollution.

关键词： uranium dandelion-shaped axial size effect crystal facet homojunction ohmic contact

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

Harvesting the Vibration Energy of CdS for High-Efficient Piezo-Photocatalysis Removal of U(Ⅵ):Roles of Shape Dependent and Piezoelectric Polarization

引用

Energy & Environmental Materials 2024年第5期7卷 391-403页

作者： Zhimin Dong Donglin Gao Zifan Li Haonan Pei Lin Xu Jian Huang Xiaohong Cao Youqun Wang Ting Wang Qianglin Wei Zhibin Zhang yunhai liu State Key Laboratory of Nuclear Resources and Environment East China University of Technology Institute of Geology Chinese Academy of Geological Sciences

Piezo-photocatalysis could coalesce the advantages of mechanical vibration and solar energy perfectly to achieve high-efficiency catalytic activity. Herein,the quintessential piezoelectric material CdS nanowires with different aspect ratios are precisely constructed and applied for piezo-photocatalytic reduction of U（Ⅵ） for the first time. The ultrasonic （60 kHz, 100 W） induces piezoelectric potential to generate a 0.57 eV A-1electric field, which is added to the direction of CdS （010） as a driving force to efficiently separate photogenerated charges. The alliance between piezoelectric effect and photocatalytic activity endows CdS NW-3 with the fastest piezophotocatalytic rate under ultrasonic vibration and 5 W LED irradiation, and the relevant rate constant (0.042 min-1) is about 12 and 53.8 times than that of LED and ultrasonication. More importantly, 93.74%of U（Ⅵ） could be removed from natural uranium mine wastewater. Therefore, this piezophotocatalysis system that reduces U（Ⅵ） to easily separable （UO2）O2·2H2O（s） provides valuable input for disposal applications of radioactive wastewater and broadens the horizons of nuclear energy utilization toward the advancement of carbon neutrality.

关键词： (UO2)O2·2H2O CdS nanowires piezo-photocatalytic piezo-potential U(VI)

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

A H_(4)SiW_(12)O_(40)-catalyzed three-component tandem reaction for the synthesis of 3,3-disubstituted isoindolinones

引用

Chinese Chemical Letters 2024年第1期35卷 233-236页

作者： Yufeng liu Guodong Zeng Yutao Cheng Lei Chen yunhai liu Yongge Wei Guoping Yang School of Chemistry Biology and Material ScienceJiangxi Province Key Laboratory of Synthetic ChemistryJiangxi Key Laboratory for Mass Spectrometry and InstrumentationEast China University of TechnologyNanchang 330013China Key Lab of Organic Optoelectronics&Molecular Engineering of Ministry of Education Department of ChemistryTsinghua UniversityBeijing 100084China

A H_(4)SiW_(12)O_(40)-catalyzed three-component tandem reaction of 2-acylbenzoic acids,primary amines and phosphine oxides to form 3,3-disubstituted isoindolinones was *** employing A H_(4)SiW_(12)O_(40)as the catalyst and dimethyl carbonate(DMC)as the solvent,a diverse range of 2-acylbenzoic acid derivatives and primary amines worked well to give the C3-phosphinoyl-functionalized 3,3-disubstituted isoindolinones with the yield range of 61%-87%.Advantages of this transformation include green catalyst and solvent,available starting materials,broad substrate scope,high efficiency and operational simplicity with water as the sole *** strategy achieved an efficient and green molecular fragment assembly to access isoindolinones,which would provide opportunities for the synthesis of potential biologically active molecules in a green manner.

关键词： Polyoxometalates Dehydrative coupling Three-component tandem reaction 3,3-Disubstituted isoindolinones Organic carbonate

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

Recent progress of radionuclides separation by porous materials

引用

Science China Chemistry 2024年第11期67卷 3515-3577页

作者： Yinghui Xie Long Yu Long Chen Cheng Chen Li Wang Fenglei liu Yun Liao Peng Zhang Tao Chen Yihui Yuan Yuexiang Lu Boyang Huang Hui Yang Suhua Wang Shuao Wang Lijian Ma Feng Luo yunhai liu Baowei Hu Hongqing Wang Duoqiang Pan Wenkun Zhu Ning Wang Zhe Wang Liang Mao Shengqian Ma Xiangke Wang Guangdong Provincial Key Laboratory for Green Agricultural Production and Intelligent Equipment School of Environmental Science and Engineering Guangdong University of Petrochemical Technology School of Life Science Shaoxing University College of Environmental Science and Engineering North China Electric Power University State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions Soochow University College of Chemistry Sichuan University School of Chemistry and Materials Science East China University of Technology School of Chemistry and Chemical Engineering University of South China Frontiers Science Center for Rare Isotopes Lanzhou University State Key Laboratory of Environment-friendly Energy Materials National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety Sichuan Civil-military Integration Institute School of National Defence & Nuclear Science and TechnologySouthwest University of Science and Technology State Key Laboratory of Marine Resource Utilization in South China Sea Collaborative Innovation Center of Marine Science and Technology Hainan University Institute of Nuclear and New Energy Technology Tsinghua University State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Department of Chemistry University of North Texas

The separation of radionuclides is critical for the sustainable development of nuclear energy. It is urgent to design and prepare functionalized materials for efficient radionuclides separation. Porous materials are considered excellent candidates for the separation of radionuclides under complex conditions due to their high specific surface areas, tunable pore structures and controllable functionalities. In this review, we summarized the design, preparation and functionalization of porous materials and their application for separation of radionuclides in the past five years, discussed the separation performance and analyzed the structure-activity relationship between various radionuclides and porous materials, and systematically clarified their characterization and mechanism of different type porous materials. We also introduced the detection, irradiation and chemical toxicity of different reflective radionuclides.

关键词： porous materials radionuclides detection separation radiotoxicity interaction mechanism

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

基于弹目对抗博弈策略的目标毁伤概率模型

引用

探测与控制学报 2024年第5期46卷 28-33页

作者：刘方卢莉萍李翰山薛静云刘云海西安工业大学电子信息工程学院陕西西安710021 西安工业大学机电工程学院陕西西安710021

由于现有武器弹药制导方式与目标防御的智能性以及智能弹药与目标交汇存在的对抗性,很难建立科学的目标毁伤评估策略模型和毁伤数值计算方法,为了高效、准确地评估智能弹药武器对目标的毁伤效能,提出了弹目交汇下攻防博弈毁伤策略建模方... 详细信息

由于现有武器弹药制导方式与目标防御的智能性以及智能弹药与目标交汇存在的对抗性,很难建立科学的目标毁伤评估策略模型和毁伤数值计算方法,为了高效、准确地评估智能弹药武器对目标的毁伤效能,提出了弹目交汇下攻防博弈毁伤策略建模方法,通过将弹丸与目标作为二人对抗非合作博弈模型中的两个局中人,以弹目攻防双方的策略集与价值信息为依据,构建攻防双方博弈收益支付矩阵,并计算了弹目攻防双方博弈模型混合策略下纳什均衡解。基于目标毁伤准则,构建了目标毁伤概率计算模型。算例计算与仿真验证结果表明:博弈纳什均衡策略的目标毁伤评估方法具有一定有效性和准确性,能够为目标毁伤评估体系提供有效参考。

关键词：弹目对抗博弈混合策略纳什均衡破片毁伤概率

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

基于激光近炸引信最佳起爆延时的目标毁伤建模

引用

探测与控制学报 2024年第5期46卷 13-21页

作者：陈景新李翰山刘云海薛静云西安工业大学电子信息工程学院陕西西安710021 西安工业大学机电工程学院陕西西安710021

针对传统的目标毁伤计算时未详细考虑激光近炸引信的起爆延时,从而导致对目标毁伤效能的计算与实际存在一定差距的问题,提出激光近炸引信弹目交会条件下基于最佳起爆延时的目标毁伤建模方法。推导了使引信处于最佳近炸位置的弹目交会近... 详细信息

针对传统的目标毁伤计算时未详细考虑激光近炸引信的起爆延时,从而导致对目标毁伤效能的计算与实际存在一定差距的问题,提出激光近炸引信弹目交会条件下基于最佳起爆延时的目标毁伤建模方法。推导了使引信处于最佳近炸位置的弹目交会近炸最佳起爆延时函数;在确定最佳起爆延时的基础上,结合对破片群飞散特性的分析,建立了激光近炸引信对目标的毁伤概率计算模型。仿真分析了不同因素对近炸引信最佳起爆延时的影响。通过模拟近炸引信对目标的毁伤实验结果可以看出激光近炸引信的起爆延时影响着最终的目标毁伤概率,这将为提高激光近炸引信的毁伤效能提供参考。

关键词：激光近炸引信弹目交会最佳起爆延时破片毁伤概率

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

基于谐波通讯的无线电能与反向信号同步传输技术

引用

中国电机工程学报 2024年第13期44卷 5297-5307,I0023页

作者：夏晨阳鄢家安任刚杨子健刘云海鲁扬廖志娟李卫龙中国矿业大学电气工程学院江苏省徐州市221008 安徽省煤炭科学研究院安徽省合肥市230001

针对现有无线电能与反向信号同步传输(simultaneous wireless power and reverse signal transmission,SWPRST)系统存在较大无功功率、负载电压易受信号传输发生波动或需要额外增加高频信号源等问题,提出一种基于谐波通讯的SWPRST技术,... 详细信息

针对现有无线电能与反向信号同步传输(simultaneous wireless power and reverse signal transmission,SWPRST)系统存在较大无功功率、负载电压易受信号传输发生波动或需要额外增加高频信号源等问题,提出一种基于谐波通讯的SWPRST技术,通过利用逆变器输出方波电压中的基波分量传输电能,三次谐波分量传输信号。不需要外加高频信号发射电路,实现了可靠的电能与反向信号同步传输。首先,给出基于谐波通讯的SWPRST系统结构,对其工作模式和基本原理进行分析;接着,建立系统等效数学模型,分析系统参数取值对信号与电能传输之间的互扰影响;然后,对信号的调制解调电路进行设计,分析信号检测通道参数对信号传输速率的影响;最后,搭建实验平台对理论分析进行验证,实验结果表明,该方法在有效实现了无线电能与反向信号同步传输的同时,信号无误码率传输速率可达5 kbps,同时系统具有无功小,输出负载电压几乎无波动(电压波动率0.33%)等优点。该方法采用谐波作为信号载体,为多频利用式实现电能与反向信号同步传输系统提供一种新的思路,具有较好的理论意义与实际工程应用价值。

关键词：无线电能传输谐波反向信号稳压输出无线电能与信号同步传输

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Running-in behavior of a H‒DLC/Al_(2)O_(3) pair at the nanoscale

引用

Friction 2021年第6期9卷 1464-1473页

作者： Pengfei SHI Junhui SUN yunhai liu Bin ZHANG Junyan ZHANG Lei CHEN Linmao QIAN Tribology Research Institute State Key Laboratory of Traction PowerSouthwest Jiaotong UniversityChengdu 610031China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

Diamond-like carbon(DLC)film has been developed as an extremely effective lubricant to reduce energy dissipation;however,most films should undergo running-in to achieve a super-low friction *** this study,the running-in behaviors of an H–DLC/Al_(2)O_(3) pair were investigated through a controllable single-asperity contact study using an atomic force *** study presents direct evidence that illustrates the role of transfer layer formation and oxide layer removal in the friction reduction during *** 200 sliding cycles,a thin transfer layer was formed on the Al2O3 *** with a clean tip,this modified tip showed a significantly lower adhesion force and friction force on the original H–DLC film,which confirmed the contribution of the transfer layer formation in the friction reduction during *** was also found that the friction coefficient of the H–DLC/Al_(2)O_(3) pair decreased linearly as the oxygen concentration of the H–DLC substrate surface *** phenomenon can be explained by a change in the contact surface from an oxygen termination with strong hydrogen bond interactions to a hydrogen termination with weak van der Waals *** results provide new insights that quantitatively reveal the running-in mechanism at the nanoscale,which may help with the design optimization of DLC films for different environmental applications.

关键词： hydrogenated diamond-like carbon(H–DLC)film running-in nanoscale oxide film transfer layer

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

U(VI) adsorption behavior onto polypyrrole coated 3R-MoS2 nanosheets prepared with the molten salt electrolysis method

引用

International Journal of Minerals,Metallurgy and Materials 2022年第3期29卷 479-489页

作者： Yuhui liu Meng Tang Shuang Zhang Yuling Lin Yingcai Wang Youqun Wang Ying Dai Xiaohong Cao Zhibin Zhang yunhai liu State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China School of Nuclear Science and Engineering East China University of TechnologyNanchang 330013China

To improve the separation capacity of uranium in aqueous solutions, 3R-MoS2 nanosheets were prepared with molten salt electro- lysis and further modified with polypyrrole (PPy) to synthesize a hybrid nanoadsorbent (PPy/3R-MoS2). The preparation conditions of PPy/3R- MoS2 were investigated and the obtained nanosheets were characterized with scanning electron microscope (SEM), high resolution transmis- sion electron microscope (HRTEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectro- scopy (XPS). The results showed that PPy/3R-MoS2 exhibited enhanced adsorption capacity toward U(VI) compared to pure 3R-MoS2 and PPy;the maximum adsorption was 200.4 mg/g. The adsorption mechanism was elucidated with XPS and FTIR: (1) negatively charged PPy/3R-MoS2 nanosheets attracted by an electrostatic interaction;(2) exposed C, N, Mo, and S atoms complexed with U(VI) through co- ordination;(3) Mo in the complex partly reduced the adsorbed U(VI) to U(IV), which further regenerated the adsorption point and continu- ously adsorbed U(VI). The design of the PPy/3R-MoS2 composite with a high adsorption capacity and chemical stability provides a new direc- tion for the removal of radionuclide.

关键词： molten salt electrolysis 3R-MoS2 nanosheets polypyrrole modification adsorption uranium

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：