检索结果-南通市图书馆

基于知识图谱可视化的三山五园学术领域知识分析

在线全文

学校读者我要写书评

暂无评论

北京联合大学学报 2025年第1期39卷 53-61页

作者：洪文董焱北京联合大学图书馆北京100101 北京联合大学应用文理学院北京100191

三山五园学术研究是北京文化特征与文脉传承研究的重要学术领域,自三山五园入选国家文物保护利用示范区以来,其研究深度和广度都得到了显著提升。利用知识图谱,在深入分析与解读三山五园学术研究现状的基础上,系统梳理并展示了领域研究... 详细信息

三山五园学术研究是北京文化特征与文脉传承研究的重要学术领域,自三山五园入选国家文物保护利用示范区以来,其研究深度和广度都得到了显著提升。利用知识图谱,在深入分析与解读三山五园学术研究现状的基础上,系统梳理并展示了领域研究的整体框架和脉络,明确揭示了研究的主要方向、热点及发展趋势,评估了研究者在该领域的学术水平和影响力,为推动三山五园的保护和利用提供了有力支持,也为领域学术研究向更深层次发展提供了参考依据。

关键词：三山五园知识图谱领域知识可视化分析

Effect of neonatal hypoxia-ischemia brain injury on the function of CA1 pyramidal cells

在线全文

学校读者我要写书评

暂无评论

Effect of neonatal hypoxia-ischemia brain injury on the func...

中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： yan-dong ZHAO,wen-Juan HE,Lu DU,Huai-Zhen RUAN~* Department of Neurobiology,College of Basic Medical Sciences,Chongqing Key Laboratory of Neurobiology,Third Military Medical University,Chongqing 400038,China

Hypoxic-ischemic(HI) brain injury in the perinatal period is one of the most important factors of neonatal mortality and subsequent *** combined effects of cellular energy failure,acidosis,glutamate release, intracellular Ca accumulation,lipid peroxidation,and nitric-oxide neurotoxicity can lead to neuronal apoptosis and necrosis,and then result in the loss of *** the same time,the changes of neural functions should be earlier than the morphological changes;well there is still no report about *** this study,animals were divided into control group and hypoxia-ischemia *** HI brain injury rat model was obtained by unilateral occlusion of left carotid artery,followed by exposure to hypoxia(92%N2,8%02) for 1.5 h at 7-day-old *** patch clamp, immunohistochemistry and western bloting technologies were used to test the normal electrophysiological properties, the excitatory postsynaptic currents(EPSCs),the expression and disposition of synaptophysin,VGluT1,NMDAR, and AMPAR of hippocampal CAl area pyramidal cells immediately after HI injury and *** with the naive control group,CAl pyramidal neurons of HI models showed that the excitabilities of HI injury hippocampal CAl pyramidal cells were decreased and the amplitude and duration of EPSCs were *** expression of synaptophysin,NMDAR,and AMPAR was not changed,while the expression of VGluT1 was lower than the control *** of these results indicated that the decrease of neural excitability of HI injury models was the protective responses of neurons,but the damage of HI brain injury was beyond the ability of ***,giving the proper treatment after injury was very necessary.

关键词： hypoxia-ischemia brain injury patch clamp hippocampus

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

蜜蜂肠道纳豆发酵菌株的分离与鉴定

蜜蜂杂志 2017年第4期37卷 11-13页

作者：徐艳陈芳严文东王淼李腾董坤云南农业大学东方蜜蜂研究所云南会泽县畜牧兽医局

蜜蜂肠道中的细菌种类丰富,其中的芽孢杆菌是优势菌。对东方蜜蜂肠道、西方蜜蜂肠道、市售纳豆产品、纳豆发酵粉中细菌进行分离与纯化,获得6株芽孢杆菌,通过传统培养进行形态学分析及16S rDNA测序比对,结果表明:蜜蜂肠道中与纳豆产品中... 详细信息

蜜蜂肠道中的细菌种类丰富,其中的芽孢杆菌是优势菌。对东方蜜蜂肠道、西方蜜蜂肠道、市售纳豆产品、纳豆发酵粉中细菌进行分离与纯化,获得6株芽孢杆菌,通过传统培养进行形态学分析及16S rDNA测序比对,结果表明:蜜蜂肠道中与纳豆产品中存在2种相似菌株,分别是解淀粉芽孢杆菌(Bacillus amyloliquefaciens)和枯草芽孢杆菌(Bacillus subtilis),这2种菌都可用于纳豆的发酵生产。

关键词：蜜蜂肠道解淀粉芽孢杆菌枯草芽孢杆菌鉴定

钦州湾南部表层沉积物重金属分布及生态危害评价

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

海洋科学进展 2017年第2期35卷 284-294页

作者：王恩康孙永根夏鹏佟智成金玉休徐艳东闫文文王晶国家海洋局第一海洋研究所山东青岛266061 钦州市海洋环境监测预报中心广西钦州535000 山东省海洋资源与环境研究院山东烟台264006

分析2013年钦州湾南部海域的表层沉积物样品,拟对其7种重金属元素质量分数的空间分布特征进行探讨。采用单因子污染指数法和潜在生态危害指数法对沉积物污染程度及其潜在生态危害进行评价,并利用主成分分析法对其重金属的潜在来源进行解... 详细信息

分析2013年钦州湾南部海域的表层沉积物样品,拟对其7种重金属元素质量分数的空间分布特征进行探讨。采用单因子污染指数法和潜在生态危害指数法对沉积物污染程度及其潜在生态危害进行评价,并利用主成分分析法对其重金属的潜在来源进行解析,结合2011年和2012年同区的调查数据对近3a来重金属质量分数的变化趋势进行研究。研究发现:重金属Pb,Cr,Hg,As质量分数在研究区中南部海域较高,Cu和Zn在犀牛脚外侧海域质量分数整体较高,Cd在研究区西北侧的钦州港南部海域质量分数较高;Cd的生态危害达到中度危害水平,其他6种重金属(Cu,Pb,Zn,Cr,Hg,As)生态危害程度较轻;重金属的潜在来源主要为钦州港周边海上交通排污、港口疏浚和周边河流陆源排污;2013年调查的Zn和Hg质量分数均明显高于2011年和2012年的。

关键词：钦州湾表层沉积物重金属时空分布生态危害

TRMT6 and TRMT61A facilitated acute pancreatitis severity via regulation of neutrophil function

在线全文

学校读者我要写书评

暂无评论

Science China Life Sciences 2025年

作者： Yuan dong Li Su Sin Man Lam Cen yan Yalan Deng Guotao Lu Jinkui yang Guanghou Shui Yingmei Feng Beijing Institute of Hepatology Beijing Youan HospitalCapital Medical University Department of Science and Development Beijing Youan HospitalCapital Medical University Laboratory for Clinical Medicine Capital Medical University Neuroscience Research Institute Peking University Center of Medical and Health AnalysisPeking University State Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental BiologyChinese Academy of Sciences Pancreatic Center Department of GastroenterologyAffiliated Hospital of Yangzhou UniversityYangzhou University Beijing Key Laboratory of Diabetes Research and Care Department of EndocrinologyBeijing Tongren HospitalCapital Medical University

Dear Editor,Type 2 diabetes mellitus (T2DM) has been identified as a risk factor for increased severity in acute pancreatitis (AP)(Mikóet al,2018).However,to date,no studies have simultaneously included healthy individuals,T2DM patients,and AP patients to investigate which diabetes-associated metabolites are linked to AP severity.

关键词：

Stepwise assembly to construct stable copper(I) cluster-based circularly polarized luminescent MOFs

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2025年

作者： Jing-wen Xie Meng-Ting Wang yan Jin Si Li Jian-Hua Qin Shuang-Quan Zang Tomas C.W.Mak College of Chemistry Henan Key Laboratory of Crystalline Molecular Functional Materials Zhengzhou University College of Chemistry and Chemical Engineering Luoyang Normal University Department of Chemistry The Chinese University of Hong Kong

Circularly polarized luminescence （CPL） materials have been extensively studied in recent years owing to their widespread applications in 3D display,optical storage,optical anti-counterfeiting,and biological imaging,***（I） clusters have emerged as a promising candidate for CPL materials,driven by their cost-effectiveness,superior luminescent properties,precise structure,and low ***,the poor environmental stability of copper（I） clusters renders their synthesis and preservation challenging,thereby significantly impeding their ***,we have designed and synthesised a chiral double-coordinated ligand in order to construct copper（I） cluster nodes that can be further *** anticipated,by utilizing stepwise assembly strategy,a Cu4cluster node co-modified by chiral alkynyl ligands and triphenylphosphine was further assembled with Cd2+ions to obtain 2D layers structure,L/*** L/D-Cu4-Cd exhibits excellent stability and optical properties,including bright yellow emission,solvent-responsive luminescence,and CPL activity with a maximum glumup to 2.0×10-3,which shows potential applications in the WLED and *** interestingly,the material also exhibits deflection ability towards different wavelengths of linearly polarized light,showing certain potential in the preparation of circular polarizer.

关键词：

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

泥石流多发干旱河谷区植被恢复研究

山地学报 2002年第2期20卷 188-193页

作者：沈有信张彦东刘文耀中国科学院西双版纳热带植物园中国科学院西双版纳热带植物园云南昆明650223

云南东北部东川小江流域的干旱河谷土地退化十分严重 ,土地表层的砾石含量已超过 6 0 % ,有机质含量、全氮、有效氮、有效磷、有效钾的含量相对于残存燥红土明显下降。草坡是当地的主要植被类型 ,并未起到防治土地退化的应有作用。以合... 详细信息

云南东北部东川小江流域的干旱河谷土地退化十分严重 ,土地表层的砾石含量已超过 6 0 % ,有机质含量、全氮、有效氮、有效磷、有效钾的含量相对于残存燥红土明显下降。草坡是当地的主要植被类型 ,并未起到防治土地退化的应有作用。以合欢 (Leucaenaglauca)、马桑 (Coriariasinica)种植为主的恢复方式对土地的恢复有明显的改善作用。高密度的乔木树种合欢的种植使林下的草本物种的数量和组成发生了极大变化 ,较耐荫的植物占据了林分下层 ,且物种数量较草坡减少 ,群落多样性指数降低。三种马桑种植方式下 ,不但原有的草坡群落的物种仍有大量的生存空间 ,而且为一些新物种创造了生存环境 ,从而使物种的种类较原有草坡地增加 ,提高了群落的多样性指数。合欢种植的生物量最高 ,对解决当地薪柴严重短缺意义重大 ,马桑种植在增加灌木层生物量的同时 ,并未改变草坡的物种组成 ,还可兼顾解决当地的饲草和放牧 ,应大力推广

关键词：土地退化植被恢复干旱河谷泥石流

同型半胱氨酸及超敏C反应蛋白与冠心病相关性的研究

在线全文

学校读者我要写书评

暂无评论

内蒙古医学杂志 2011年第7期43卷 774-776页

作者：董彦文牧骑祁宏王凯赤峰学院附属医院心内科内蒙古赤峰024000

目的:探讨同型半胱氨酸(HCY)、超敏C反应蛋白与冠心病的相关性。方法:本研究共检测了149例CHD患者和33例正常对照组HCY、hs-CRP水平,并行选择性冠状动脉造影,应用免疫投射比浊法测定hs-CRP含量,酶联免疫分析法测定Hcy含量。冠心病组根... 详细信息

目的:探讨同型半胱氨酸(HCY)、超敏C反应蛋白与冠心病的相关性。方法:本研究共检测了149例CHD患者和33例正常对照组HCY、hs-CRP水平,并行选择性冠状动脉造影,应用免疫投射比浊法测定hs-CRP含量,酶联免疫分析法测定Hcy含量。冠心病组根据临床特点分为AMI组、UAP组、SAP组。结果:①CHD组患者传统的CHD危险因素指标中TC、LDL的水平与正常对照组相比显著升高(P<0.05),而HDL水平则明显降低(P<0.05)。②冠心病组HCY水平较对照组显著升高(P<0.01),SAP、UAP、AMI组HCY水平依次升高(P<0.05)。③冠心病组hs-CRP水平较对照组显著升高(P<0.01),SAP、UAP、AMI组hs-CRP水平依次升高(P<0.05)。结论:Hcy、hs-CRP为冠心病的危险因素,可以为冠心病的危险分层提供依据。

关键词：冠心病同型半胱氨酸超敏C反应蛋白

Potassium ions and cyano group modified g-C3N4 for effective generation of H2O2 through two-electron oxygen reduction

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期 192-200页

作者： dongying Wang Shulan Pu Yongmin Chen Ke Lei Yujie Duan Linjiao Mao Xuhui Zeng Xi Luo Yuntao Zhang Yuqin dong Jin Zhong Zhang yan Sun School of Mechanical Engineering Chengdu University Department of Chemistry and Biochemistry University of California

Potassium ions （K+） doped graphitic carbon nitride （g-C3N4） was prepared by a thermal etching method using potassium hydroxide （KOH） as an ion *** transform infrared spectroscopy （FTIR） and X-ray photoelectron spectroscopy （XPS）results showed that the generation of the cyano group was detected while introducing K+.Under simulated sunlight irradiation,the sample with a K+doping amount of 10%showed the highest hydrogen peroxide （H2O2） generation rate of2,140.2μmol *** apparent quantum yield （AQY） at 400 nm and the solar-to-chemical conversion （SCC） are 4.35%and1.23%,respectively.K+acted as a bridge between g-C3N4layers,which enhanced charge transfer ***,the cyano group enhanced the adsorption capacity of protons （H+） and promoted the yield of *** catalyst exhibited excellent photocatalytic stability based on four-cycle *** addition,a mechanism study showed that superoxide radicals （·O2-）were the most important active species in the reaction *** production of H2O2was achieved through consecutive single-electron *** study deepens the understanding of the oxygen reduction reaction process and opens up a new venue for improving H2O2generation.

关键词：

同方期刊数据库