检索结果-南通市图书馆

Modulated noble metal/2D MOF heterostructures for improved hydrogen storage of MgH_(2)

Rare Metals 2024年第4期43卷 1672-1685页

作者： Zeng-Yi Li Li-xian Sun Fen Xu Yu-Mei Luo Yong-Peng Xia Sheng Wei Chen-Chen Zhang Ri-Guang Cheng Chao-Feng Ye Meng-Yuan Liu Ju-lan Zeng Zhong Cao Hong-Ge Pan School of Material Science and Engineering Guilin University of Electronic TechnologyGuilin541004China School of Chemistry and Chemical Engineering Changsha University of Science and TechnologyChangsha410114China Institute of Science and Technology for New Energy Xi’an Technological UniversityXi’an710021China

The conjugation of external species with twodimensional(2D)materials has broad application *** this study,we have explored the potential of noble metal/2D MOF heterostructures in hydrogen ***,the MgH_(2)-Ni-MOF@Pd system has shown remarkable hydrogen desorption/sorption performances,starting to liberate hydrogen at 1810C,which is 2300C lower than that of pristine *** the catalytic effect of Ni-MOF@Pd,the dehydrogenation apparent activation energy of MgH2 is noticeably decreased from(133.5±17.5)to(34.58±1.87)kJ·moL^(-1),and the hydrogenation apparent activation energy is reduced from(70.41±7.43)to(25.78±4.64)kJ·moL^(-1),which is lowered by 63.4%.The fully-dehydrogenated MgH2-NiMOF@Pd composite rapidly uptakes hydrogen,with 2.62wt%at 100℃and 6.06 wt%at 150℃within 300 s,*** mechanism analysis of MgH2 catalyzed by Ni-MOF@Pd has revealed that the transformation of Mg_2Ni and Mg_2NiH_4 could act as a"hydrogen pump",providing numerous channels for fast diffusion and transport of hydrogen ***,in the dehydrogenation process,the element Pd reacts with MgH_(2)to form the MgPd alloy phase,which makes MgH_(2)take precedence to decompose through the Mg-Pd alloy rather than self-decomposition,further reducing thermal stability and improving de/hydrogenation *** synergistic effect of Mg-Pd,Mg_2Ni,and the special ultra-thin 2D sheet structure of the additive is the main reason for the good hydrogen storage property of MgH_(2)-Ni-MOF@*** findings provide inspiration for designing efficient multifunctional additives with unique morphologies to optimize the hydrogen desorption/sorption behaviors of hydrogen storage materials.

关键词： Hydrogen storage Magnesium hydride 2D metal-organic framework nanosheets Ni/Pd Synergistic catalysis

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

SARS-CoV-2 breakthrough infections following inactivated vaccine vaccination induce few neutralizing antibodies against the currently emerging Omicron XBB variants

引用

Virologica Sinica 2024年第1期39卷 173-176页

作者： Fan Shen Chun Liang Cui-xian Yang Ying Lu An-Qi Li Ying duan Mi Zhang c Ren-Rong Tian a Xing-Qi Dong Yong-Tang Zheng Wei Pang Key Laboratory of Bioactive Peptides of Yunnan Province/Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences KIZ-CUHK Joint Laboratory of Bioresources and Molecular Research in Common DiseasesKunming Institute of ZoologyChinese Academy of SciencesKunming650223China University of Chinese Academy of Sciences Beijing100049China Yunnan Provincial Infectious Disease Hospital Kunming650399China Department of Pathogen Biology and Immunology Faculty of Basic Medical ScienceKunming Medical UniversityKunming650500China

Dear Editor,COVID-19 inactivated vaccines have been extensively administered ***,the majority of the Chinese population has experiencedbreakthrough infections from SARS-CoV-2 ancestral,Delta or Omicronvariants over the past three years,particularly during the wave of Omicron BA.5 and BA.7 variants at the end of 2022(Zhu et al.,2023).Subsequently,new Omicron variants,such as BQ.1,BQ.1.1,XBB,XBB.1/XBB.1.9,and XBB.1.5/XBB.1.9.1,are emerging in China(Yueetal.,2023;Zhu et al.,2023).Therefore,it is an urgentneed and a publichealth imperative to assess the extent of the immunoprotection established in this population.

关键词： breakthrough neutral Omi

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

大国科技竞争与国际大科学合作的国家战略选择——基于中美案例比较分析

引用

东北亚论坛 2024年第3期33卷 33-46,127页

作者：林娴岚湖北大学区域与国别研究院武汉430062 湖北大学公共管理学院武汉430062

大科学是人类开拓知识前沿和解决重大问题的手段,而国际大科学合作则是冷战时期大国科技竞争的产物。在传统大国科技竞争视域下,一国竞争地位影响其在国际大科学合作中的战略选择。国际科技领先国家会首选由本国牵头的国际大科学合作模... 详细信息

大科学是人类开拓知识前沿和解决重大问题的手段,而国际大科学合作则是冷战时期大国科技竞争的产物。在传统大国科技竞争视域下,一国竞争地位影响其在国际大科学合作中的战略选择。国际科技领先国家会首选由本国牵头的国际大科学合作模式,领先地位受冲击后退而寻求多国共建模式,并以保守姿态参与其中。非领先国家则首选多国共建类合作模式,以开放式参与提升自身科技实力,实现地位跃升后尝试牵头组织国际大科学合作。当前,大科学的时代内核已由以军用为主转为民用为主,各国参与国际大科学合作的动机不再拘泥于抢占科技制高点的国家战略需求,而更多转向应对人类生存发展问题的全球共性需求。在此背景下,面对固守零和式竞争逻辑的美国在国际大科学合作中有限参与和对中国施压,中国不能陷入传统大国科技竞争模式的窠臼,而应坚持共商共建共享原则与互利共赢理念,不断拓展国际大科学合作空间,与更多国家携手探寻大科学服务于人类命运共同体建设的合作之道。

关键词：科技竞争大科学国际合作中国美国大国科技竞争国际大科学合作

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

Opinion consensus incorporating higher-order interactions in individual-collective networks

引用

Chinese Physics B 2024年第7期33卷 105-115页

作者：叶顺涂俐兰王先甲胡佳王薏潮 Hubei Province Key Laboratory of Systems Science in Metallurgical Process Wuhan University of Science and TechnologyWuhan 430065China College of Science Wuhan University of Science and TechnologyWuhan 430065China Economics and Management School of Wuhan University Wuhan UniversityWuhan 430065China

In the current information society, the dissemination mechanisms and evolution laws of individual or collective opinions and their behaviors are the research hot topics in the field of opinion dynamics. First, in this paper, a two-layer network consisting of an individual-opinion layer and a collective-opinion layer is constructed, and a dissemination model of opinions incorporating higher-order interactions(i.e. OIHOI dissemination model) is proposed. Furthermore, the dynamic equations of opinion dissemination for both individuals and groups are presented. Using Lyapunov's first method,two equilibrium points, including the negative consensus point and positive consensus point, and the dynamic equations obtained for opinion dissemination, are analyzed theoretically. In addition, for individual opinions and collective opinions,some conditions for reaching negative consensus and positive consensus as well as the theoretical expression for the dissemination threshold are put forward. Numerical simulations are carried to verify the feasibility and effectiveness of the proposed theoretical results, as well as the influence of the intra-structure, inter-connections, and higher-order interactions on the dissemination and evolution of individual opinions. The main results are as follows.(i) When the intra-structure of the collective-opinion layer meets certain characteristics, then a negative or positive consensus is easier to reach for individuals.(ii) Both negative consensus and positive consensus perform best in mixed type of inter-connections in the two-layer network.(iii) Higher-order interactions can quickly eliminate differences in individual opinions, thereby enabling individuals to reach consensus faster.

关键词： two-layer social networks individual and collective opinions higher-order interactions consensus Lyapunov's first method

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

Fetoscopic Laser Photocoagulation for Twin-Twin Transfusion Syndrome in a Dizygotic Monochorionic Twins

引用

Maternal-Fetal Medicine 2024年第2期6卷 110-114页

作者： Huirong Tang Chenyan Dai Huijun Li xiangyu Zhu Honglei duan xian Xiao Liang Jin Jie Li Mingming Zheng Department of Obstetrics and Gynecology the Affiliated Drum and Tower Hospital of Medical School of Nanjing UniversityNanjing 210000JiangsuChina Now with Fetal Medicine Center Anhui Women and Children's Medical CenterHefei 230001AnhuiChina

To editor:Monochorionicity was traditionally considered indicative of ***,recent years have witnessed the emergence of several noteworthy instances of monochorionic dizygotic(MCDZ)twins in clinical *** 2000,Viëtor et al.1 documented the initial established case of MCDZ *** studies have further documented this unconventional twinning phenomenon.2,3 The recognized complications associated with monochorionic monozygotic pregnancies,including twin-twin transfusion syndrome(TTTS),twin anemia–polycythemia sequence(TAPS),selective intrauterine growth restriction(sIUGR),congenital malformations,and intrauterine fetal death,could also manifest in MCDZ pregnancies.4,5 In this correspondence,we presented an extremely rare case of TTTS in a dizygotic monochorionic diamniotic twin gestation successfully treated with fetoscopic laser *** patients’permission to publish was obtained.

关键词： transfusion Twin editor

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

Standard-definition White-light,High-definition White-light versus Narrow-band Imaging Endoscopy for Detecting Colorectal Adenomas:A Multicenter Randomized Controlled Trial

引用

Current Medical Science 2024年第3期44卷 554-560页

作者： Chang-wei duan Hui-hong ZHAI Hui XIE xian-zong MA Dong-liang YU lang YANG Xin WANG Yu-fen TANG Jie ZHANG Hui SU Jian-qiu SHENG Jun-feng XU Peng JIN Chinese PLA General Hospital and Medical School Beijing100853China Department of Gastroenterology Xuanwu HospitalCapital Medical UniversityBeijing100053China Department of Gastroenterology The Seventh Medical Center of Chinese PLA General HospitalBeijing100700China Senior Department of Gastroenterology The First Medical Center of Chinese PLA General HospitalBeijing100853China

Objective This study aimed to compare the performance of standard-definition white-light endoscopy(SD-WL),high-definition white-light endoscopy(HD-WL),and high-definition narrow-band imaging(HD-NBI)in detecting colorectal lesions in the Chinese *** This was a multicenter,single-blind,randomized,controlled trial with a non-inferiority *** undergoing endoscopy for physical examination,screening,and surveillance were enrolled from July 2017 to December *** primary outcome measure was the adenoma detection rate(ADR),defined as the proportion of patients with at least one adenoma *** associated factors for detecting adenomas were assessed using univariate and multivariate logistic *** Out of 653 eligible patients enrolled,data from 596 patients were *** ADRs were 34.5%in the SD-WL group,33.5%in the HD-WL group,and 37.5%in the HD-NBI group(P=0.72).The advanced neoplasm detection rates(ANDRs)in the three arms were 17.1%,15.5%,and 10.4%(P=0.17).No significant differences were found between the SD group and HD group regarding ADR or ANDR(ADR:34.5%vs.35.6%,P=0.79;ANDR:17.1%vs.13.0%,P=0.16,respectively).Similar results were observed between the HD-WL group and HD-NBI group(ADR:33.5%vs.37.7%,P=0.45;ANDR:15.5%vs.10.4%,P=0.18,respectively).In the univariate and multivariate logistic regression analyses,neither HD-WL nor HD-NBI led to a significant difference in overall adenoma detection compared to SD-WL(HD-WL:OR 0.91,P=0.69;HD-NBI:OR 1.15,P=0.80).Conclusion HD-NBI and HD-WL are comparable to SD-WL for overall adenoma detection among Chinese *** can be concluded that HD-NBI or HD-WL is not superior to SD-WL,but more effective instruction may be needed to guide the selection of different endoscopic methods in the *** study’s conclusions may aid in the efficient allocation and utilization of limited colonoscopy resources,especially advanced imaging technologies.

关键词： standard-definition white-light endoscopy high-definition white-light endoscopy narrow-band imaging colonoscopy colorectal cancer screening adenoma detection rate

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

Cu single-atom electrocatalyst on nitrogen-containing graphdiyne for CO_(2)electroreduction to CH4

引用

Chinese Journal of Catalysis 2024年第9期64卷 123-132页

作者： Hao Dai Tao Song xian Yue Shuting Wei Fuzhi Li Yanchao Xu Siyan Shu Ziang Cui Cheng Wang Jun Gu Lele duan Department of Chemistry Southern University of Science and TechnologyShenzhen 518055GuangdongChina Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry School of ScienceWestlake UniversityHangzhou 310030ZhejiangChina Department of Chemistry Tsinghua UniversityBeijing 100084China Division of Solar Energy Conversion and Catalysis at Westlake University Zhejiang Baima Lake Laboratory Co.LtdHangzhou 310000ZhejiangChina Institute of Natural Sciences Westlake Institute for Advanced StudyHangzhou 310024ZhejiangChina

Developing Cu single-atom catalysts(SACs)with well-defined active sites is highly desirable for producing CH4 in the electrochemical CO_(2)reduction reaction and understanding the structure-property ***,a new graphdiyne analogue with uniformly distributed N2-bidentate(note that N2-bidentate site=N^N-bidentate site;N2¹dinitrogen gas in this work)sites are *** to the strong interaction between Cu and the N2-bidentate site,a Cu SAC with isolated undercoordinated Cu-N2 sites(Cu1.0/N2-GDY)is obtained,with the Cu loading of 1.0 wt%.Cu1.0/N2-GDY exhibits the highest Faradaic efficiency(FE)of 80.6%for CH4 in electrocatalytic reduction of CO_(2)at-0.96 V ***,and the partial current density of CH4 is 160 mA cm^(-2).The selectivity for CH4 is maintained above 70%when the total current density is 100 to 300 mA cm^(-2).More remarkably,the Cu1.0/N2-GDY achieves a mass activity of 53.2 A/mgCu toward CH4 under-1.18 V *** situ electrochemical spectroscopic studies reveal that undercoordinated Cu-N2 sites are more favorable in generating key*COOH and*CHO intermediate than Cu nanoparticle *** work provides an effective pathway to produce SACs with undercoordinated Metal-N2 sites toward efficient electrocatalysis.

关键词： Carbon dioxide reduction Electrocatalysis Cu single-atom catalyst N-containing graphdiyne Methane

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

Coupling of quasi-localized and phonon modes in glasses at low frequency

引用

Chinese Physics B 2024年第5期33卷 564-571页

作者：段军蔡松林丁淦戴兰宏蒋敏强 State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 101408China

Boson peak of glasses,a THz vibrational excess compared to Debye squared-frequency law,remains mysterious in condensed-matter physics and material *** appears in many different kinds of glassy matters and is also argued to exist in damped crystals.A consensus is that boson peak originates from the coupling of the(quasi)-localized non-phonon modes and the plane-wave-like phonon modes,but the coupling behavior is still not fully *** this paper,by modulating the content of localized modes and the frequencies of phonon modes,the coupling is clearly reflected in the localization and anharmonicity of low-frequency vibrational *** coupling enhances with increasing cooling rate and sample *** finite sample size,phonon modes do not fully intrude into the low frequency to form a dense spectrum and they are not sufficiently coupled to the localized modes,thus there is no Debye level and boson peak is *** suggestion remains valid in the presence of thermal motions induced by temperature,even though the anharmonicity comes into *** results point to the coupling of quasi-localized and phonon modes and its relation to the boson peak.

关键词： metallic glasses low-frequency vibrational modes plane wave boson peak

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

Integrated gut microbiota,plasma metabolomics and network pharmacology to reveal the anti-ischemic stroke effect of cooked rhubarb

引用

Traditional Medicine Research 2024年第9期9卷 1-13页

作者： Ting Li lan-Fang Tan Lin Shen Jie-Hui Kuang Si-Kai Zhan Bang Liu Jia-Le Cai Sheng-Wang Liang Ming-Hua xian Shu-Mei Wang School of Chinese Materia Medica Guangdong Pharmaceutical UniversityGuangzhou 510006China Key Laboratory of Digital Quality Evaluation of Chinese Materia Medica of State Administration of TCM School of Chinese Materia MedicaGuangdong Pharmaceutical UniversityGuangzhou 510006China Engineering&Technology Research Center for Chinese Materia Medica Quality of the Universities of Guangdong Province School of Chinese Materia MedicaGuangdong Pharmaceutical UniversityGuangzhou 510006China Guangxi Key Laboratory of Functional Phytochemicals Research and Utilization Guangxi Institute of BotanyChinese Academy of SciencesGuilin 541006China Traditional Chinese Medicine Resource Germplasm Bank Management Center Yunfu 527300China

Background:Cooked rhubarb(CR)is obtained by steaming raw rhubarb(Rheum palmatum L.,Rheum officinale Baill.,or Rheum tanguticum *** Balf.)with millet *** is used as a traditional Chinese medicine for treating cerebral stroke,where patients often face severe *** study explored the pharmacological effects and mechanisms of CR against ischemic stroke(IS)in *** used integrated analysis of gut microbiota,metabolomics,and network ***:The compounds in CR were identified using LC-MS/*** impact of CR on rat middle cerebral artery occlusion/reperfusion(MCAO/R)-induced cerebral infarct size and brain tissue pathology was assessed through 2,3,5-triphenyl tetrazolium chloride and HE *** in hemorheology were measured by evaluating blood viscosity,and serum levels of pro-inflammatory cytokine were also *** microbiota composition was analyzed through 16S rRNA gene *** metabolites were examined using untargeted metabolomics and Spearman correlation *** pseudo-germ-free test was used to determine whether tumour necrosis factor-α(TNF-α)and interleukin-1β(IL-1β)improvement in IS are dependent on gut ***:In vivo studies showed CR enhances neurobehavioral function in MCAO/R rats and reduces cerebral infarction *** also ameliorates brain and intestinal barrier damage caused by *** also decreased inflammation and oxidative stress in IS ***,CR promotes the growth of Akkermansia and Verrucomicrobia,aiding in intestinal barrier ***,CR primarily influences the primary bile acid biosynthesis *** pseudo-germ-free experiment and network pharmacology confirmed TNF-αand IL-1βas potential *** relies on gut microbiota for its anti-inflammatory effects to improve ***:Cooked rhubarb offers neuroprotective benefits by enhancing beneficial bacteria abundance and regulating bile acid *** emerges as a potential therapeutic agent for

关键词： cooked rhubarb ischemic stroke gut microbiota metabolomics

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

黑果枸杞和黄果枸杞的广泛靶向代谢组学分析

引用

食品科学 2024年第12期45卷 52-58页

作者：兰天段国珍祁有朝樊光辉青海大学农牧学院青海西宁810016 青海大学农林科学院青海西宁810016 青海大学医学部青海西宁810016 青海大学藏医学院青海西宁810016

目的:全面分析和鉴定枸杞果实中的代谢物,比较不同品种间代谢物的差异,为深入挖掘和利用不同品种枸杞提供参考。方法:以黑果枸杞和黄果枸杞干果为材料,利用超高效液相色谱-串联质谱进行广泛靶向代谢组学分析,鉴定和比较两种枸杞的代谢... 详细信息

目的:全面分析和鉴定枸杞果实中的代谢物,比较不同品种间代谢物的差异,为深入挖掘和利用不同品种枸杞提供参考。方法:以黑果枸杞和黄果枸杞干果为材料,利用超高效液相色谱-串联质谱进行广泛靶向代谢组学分析,鉴定和比较两种枸杞的代谢物。结果:两种枸杞果实中共检测出1098种代谢产物,包括氨基酸及其衍生物、酚酸、黄酮、生物碱、脂质等12类,其中酚酸、黄酮和生物碱3类代谢产物占比最高。通过主成分分析和聚类分析发现,黄果枸杞与黑果枸杞相比,存在235种差异代谢物上调和252种差异代谢物下调。京都基因与基因组百科全书富集分析发现,不同品种枸杞间的差异代谢物主要涉及黄酮生物合成,托烷、哌啶和吡啶生物碱的生物合成,次生代谢物的生物合成,ABC转运等途径。结论:不同品种对枸杞代谢物的含量影响较大,本研究结果对黑枸杞和黄枸杞的开发和利用提供一定的理论指导。

关键词：黑枸杞黄枸杞代谢组学代谢物黄酮生物碱

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：