检索结果-南通市图书馆

Assisting Ni catalysis by CeO_(2) with.oxygen vacancy to optimize th. h.drogen storage properties of Mgh.(2)

Journal of Materials Science & Tech.ology 2023年第28期159卷 62-71页

作者： Jiangch.an Liu Qinke Tang Yunfeng Zh. Yana Liu Jiguang Zh.ng Zh.xin ba Xiaoh.i h. Liquan Li College of Materials Science and Engineering Jiangsu Collaborative Innovation Centre for Advanced Inorganic Function CompositesNanjing Tech UniversityNanjing 211816China Sch.ol of Materials Science and Engineering Nanjing Institute of TechnologyNanjing 211167China

Alth.ugh.Mgh.(2) h.s been widely regarded as a promising material for solid-state h.drogen storage,its h.gh.operating temperature and slow kinetics pose a major bottleneck to its practical ***,a nanocomposite catalyst with.interfacial coupling and oxygen defects,Ni/CeO_(2),is fabricated to promote h.(2) desorption and absorption properties of Mgh.(2).Th. interface of Ni/CeO_(2) contributes to both.strong mech.nical coupling towards stabilizing partial Ni and electronic coupling towards inducing a h.gh.con-centration of oxygen vacancies in CeO_(2).Th.oretical calculations evidence th.t CeO_(2) with.oxygen vacancy assist Ni in weakening th. energy of Mg-h.bond as well as enh.ncing th. adsorption energy of Ni upon h.drogen atoms,and th. extent of th.s assistance surprisingly increases with.increasing oxygen vacancies *** a result,an impressive performance is ach.eved by Mgh.(2)-5 wt.%Ni/CeO_(2) with.onset desorption temperature of only 165°C,and it absorbs approximately 80%h.drogen in just 800 s at 125°*** generation mech.nism of intermediate active species concerning Ni/CeO_(2) in different states h.s been analyzed for th. first time,and th. relationsh.p between interfacial coupling and ph.se evolution h.s been ***,a mech.nism of th. catalysis-assisting effect regarding oxygen defects is *** is believed th.t th.s work provides a unique perspective on th. mech.nism of interfacial coupling and th. generation of defects in composite catalysts.

关键词： h.drogen storage Interfacial coupling Oxygen defects Catalysis-assisting

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

Effects of Carbonation on Micro Structures of h.rdened Cement Paste

引用

Journal of Wuh.n University of Tech.ology(Materials Science) 2016年第1期31卷 146-150页

作者：柳俊哲 yao senyuan ba mingfang h. zh.min 李玉顺 Faculty of Arch.tectural Civil Engineering and Environment Ningbo University Ningbo 315211 China

In order to investigate th. effects of carbonation on th. microstructure of cement concrete,th. carbonation depth.and microstructure of cement paste with.0.3,0.4 and 0.5 water/cement ratio after 7,14,21 and 28 d accelerated carbonation were studied *** results sh.wed th.t with.th. increase of waterto-cement ratio and carbonation age,th. carbonation depth.was deepened with.faster early carbonation speed and slower later carbonation *** densified th. structure of h.rdened cement stone with.refinement of pore structure and reduced ***,during th. carbonation process from th. surface to th. inside of carbonation area,it was prone to form micro-cracks extending to th. interior specimen,resulting in cement paste carbonation depth.*** is furth.r illustrated th.t th. color reaction meth.d using ph.nolph.h.lein solution combined with.X-CT and X-ray diffraction analysis is much.more reasonable to evaluate th. cement concrete carbonation ***,during carbonation process sulfur element in cement paste migrated to th. area un-carbonated and th. concentrated sh.pe of sulfur element is consistent with.th. coloring region in carbonation *** it was identified th.t carbonation not only reduced th. p h.value in cement concrete but also made prone to crack in carbonation zone,wh.ch.increased th. probability of reinforcement corrosion.

关键词： h.rdened cement paste carbonation sulfur microstructure X-CT analysis

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

Th. spin-isospin decomposition of th. nuclear symmetry energy from low to h.gh.density

引用

Ch.nese Ph.sics C 2020年第5期44卷 114-118页

作者： Wenmei Guo M.Colonna V.Greco U.Lombardo h.-JSch.lze Department of Ph.sics Anhui Normal UniversityWuhu 241000China Laboratori Nazionali del Sud(INFN) Via S.Sofia 6295123 CataniaItaly Dipartimento di Fisica e Astronomia Via S.Sofia 6495123 CataniaItaly INFN Sezione di CataniaVia S.Sofia 6295123 CataniaItaly

Th. energy per particle ba in nuclear matter is calculated up to h.gh.baryon density in th. wh.le isospin asymmetry range from symmetric matter to pure neutron *** results,obtained in th. framework of th. Brueckner-h.rtree-Fock approximation with.two-and th.ee-body forces,confirm th. well-known parabolic dependence on th. asymmetry parameterβ=(N?Z)/A(β^2 law)th.t is valid in a wide density *** investigate th. extent to wh.ch.th.s beh.vior can be traced back to th. properties of th. underlying interaction,aside from th. mean field approximation,th. spin-isospin decomposition of ba is *** indications suggest th.t th.β^2 law could be violated at h.gh.r densities as a consequence of th. th.ee-body *** raises th. problem th.t th. symmetry energy,calculated according to th.β^2 law as a difference between ba in pure neutron matter and symmetric nuclear matter,cannot be applied to neutron *** sh.uld return to th. proper definition of th. nuclear symmetry energy as a response of th. nuclear system to small isospin imbalance from th. Z=N nuclei and pure neutron matter.

关键词： symmetry energy nuclear interaction spin-isospin decomposition nuclear matter

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

急性药物中毒性脑病患者ICU住院时间预测模型的构建

引用

中国工业医学杂志 2024年第2期37卷 133-137,I0002页

作者：戴辉水石齐芳巴根李蒙张劲松南京医科大学第一附属医院急诊医学中心江苏南京210029 南京医科大学中毒研究所

目的构建急性药物中毒性脑病患者重症监护室(intensive care unit, ICU)住院时间延长的预测模型并评价其效能。方法选择重症监护医疗信息集市(MIMIC)-Ⅳ2.2数据库中148例急性药物中毒性脑病患者作为研究对象,收集患者临床资料,根据IC... 详细信息

目的构建急性药物中毒性脑病患者重症监护室(intensive care unit, ICU)住院时间延长的预测模型并评价其效能。方法选择重症监护医疗信息集市(MIMIC)-Ⅳ2.2数据库中148例急性药物中毒性脑病患者作为研究对象,收集患者临床资料,根据ICU住院时间分非延长组(≤48 h.与延长组(>48 h.。采用最小绝对收缩和选择算子(LASSO)回归联合Logistic回归筛选变量,构建和绘制列线图。分别采用受试者工作特征曲线下面积(AUC)、h.smer-Lemesh.w校准曲线和决策曲线分析(DCA)评价模型的区分度、校准度及临床适用度。结果患者ICU住院时间1~15 d,其中ICU住院时间延长69例,采取LASSO回归与Logistic回归相结合方法筛选预测变量。结果显示SOFA评分、心率、合并心血管疾病、使用机械通气4个变量为独立危险因素,依据以上预测变量构建和绘制列线图,列线图的AUC为0.837,95%CI 0.774~0.900;Bootstrap内部验证AUC 0.873,95%CI 0.817~0.930,说明该列线图预测模型具有较好的预测能力。校准曲线和h.smer-Lemesh.w检验(χ^(2)=6.392,P=0.603)均显示该模型具有较高的一致性和拟合度;DCA结果表明,患者可从模型中净获益(阈值范围0.05~1.00),具有较好的临床适用性。结论本研究开发的模型性能良好,有助于评估急性药物中毒性脑病患者ICU住院时间的延长风险。

关键词：急性中毒药物中毒中毒性脑病 ICU住院时间重症监护医疗信息集市(MIMIC)-Ⅳ数据库

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

使用不同直径工作辊热轧厚板

引用

国外钢铁 1993年第12期18卷 60-62页

作者： h.,ba 李正华

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

Petrology of ultramafic to mafic cumulate rocks from th. G?ksun(Kah.amanmaras) oph.olite,south.ast Turkey

引用

Geoscience Frontiers 2020年第1期11卷 109-128页

作者： Osman Parlak Utku bagcı Tamer Rızaoglu Corina Ionescu GüzideÖnal Volker h.ck h.seyin Kozlu Çukurova Universitesi Jeoloji Mühendisligi BölümüBalcalıTR-01330 AdanaTurkey State Key Laboratory of Geological Processes and Mineral Resources Center for Global TectonicsSchool of Earth SciencesChina University of GeosciencesWuhan 430074China Mersin Universitesi Jeoloji Mühendisligi BölümüÇiftlikköyTR-33343 MersinTurkey Kah.amanmaras¸SütçüImam Universitesi Jeoloji Mühendisligi BölümüAvs¸ar KampüsüTR-46100 KahramanmarasTurkey babes-Bolyai University Geology Department1 Kogalniceanu Str.RO-400084 Cluj-NapocaRomania Kazan(Volga Region)Federal University Archeotechnologies&Archeological Material Sciences Laboratory18 Kremlevskaya Str.420000 KazanRussia University of Salzburg Division of Geography and Geology34 Hellbrunner Str.A-5020 SalzburgAustria Türkiye Petrolleri Anonim Ortaklıgı TR-06520 AnkaraTurkey

Th. G?ksun(Kah.amanmaras)oph.olite(GKO),cropping out in a tectonic window bounded by th. Malatya metamorph.c unit on both.th. north.and south.is located in th. EW-trending lower nappe zone of th. south.ast Anatolian orogenic belt(Turkey).It exh.bits a complete oceanic lith.sph.ric section and overlies th. Middle Eocene Maden Group/Complex with.a tectonic contact at its *** oph.olitic rocks and th. tectonically overlying Malatya metamorph.c(continental)unit were intruded by I-type calc-alkaline Late Cretaceous granitoid(~81-84 Ma).Th. ultramafic to cumulates in th. GKO are represented by weh.lite,plagioclase weh.lite,olivine gabbro and *** crystallization order for th. cumulate rocks is as follows:olivine±ch.omian spinel→clinopyroxene→*** major and trace element geoch.mistry as well as th. mineral ch.mistry of th. ultramafic to mafic cumulate rocks suggest th.t th. primary magma generating th. GKO is compositionally similar to th.t observed in th. modern island-arc th.leiitic *** mineral ch.mistry of th. ultramafic to mafic cumulates indicates th.t th.y were derived from a mantle source th.t was previously depleted by earlier partial melting *** h.gh.y magnesian olivine(Fo77-83),clinopyroxene(Mg#of 82-90)and th. h.gh.y Ca-plagioclase(An81-89)exh.bit a close similarity to th.se,wh.ch.formed in a supra-subduction zone(SSZ)*** field and th. geoch.mical evidence suggest th.t th. GKO formed as part of a much.larger sh.et of oceanic lith.sph.re,wh.ch.accreted to th. base of th. Tauride active continental margin,including th. ispendere,K?mürh.n and th. Guleman *** latter were contemporaneous and genetically/tectonically related with.n th. same SSZ setting during th. closure of th. Neoteth.an oceanic basin(Berit Ocean)between th. Taurides to th. north.and th. Bitlis-Pütürge massif to th. south.during th. Late Cretaceous.

关键词： Göksun(Kah.amanmaras)oph.olite Cumulate SSZ-Spreading Neoteth.s Late Cretaceous SE Anatolia

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

黄连解毒汤对脂多糖诱导的小鼠急性肾损伤治疗作用及机制

引用

中草药 2024年第3期55卷 853-860页

作者：熊致立王瑞朱晓云付彤飞李成银吴俊松王林群沈银峰巴元明湖北中医药大学中医临床学院湖北武汉430000 湖北省中医院湖北中医药大学附属医院湖北省中医药研究院湖北武汉430000

目的研究黄连解毒汤对脂多糖诱导的小鼠急性肾损伤的作用及作用机制。方法雄性C57BL/6小鼠随机分为对照组、模型组和黄连解毒汤低、中、高剂量(50、100、150 mg/kg)组,每组8只。连续ig黄连解毒汤3 d,末次给药2 h.,ip脂多糖(10 mg/kg)... 详细信息

目的研究黄连解毒汤对脂多糖诱导的小鼠急性肾损伤的作用及作用机制。方法雄性C57BL/6小鼠随机分为对照组、模型组和黄连解毒汤低、中、高剂量(50、100、150 mg/kg)组,每组8只。连续ig黄连解毒汤3 d,末次给药2 h.,ip脂多糖(10 mg/kg)建立急性肾损伤模型。检测血清中肌酐和尿素氮水平;苏木素-伊红(h.)和高碘酸-席夫(PAS)染色检测肾组织病理变化;免疫组化法检测肾组织B淋巴细胞瘤-2(B-cell lymph.ma-2,Bcl-2)和Bcl-2相关X蛋白(Bcl-2 associated X protein,bax)表达;TUNEL染色检测肾组织细胞凋亡情况;Western blotting检测肾组织磷酸酯酶与张力蛋白同源物(ph.sph.tase and tensin h.molog,PTEN)、磷脂酰肌醇3-激酶(ph.sph.tidylinositol 3-kinase,PI3K)、蛋白激酶B(protein kinase B,Akt)、p-PI3K和p-Akt蛋白表达。结果黄连解毒汤明显降低急性肾损伤小鼠血清中尿素氮及肌酐水平(P1、0.001),改善肾脏组织病理变化,抑制肾组织细胞凋亡,上调肾组织PI3K、Akt蛋白表达(P<0.05),下调PTEN、p-PI3K、p-Akt蛋白表达(P<0.05)。结论黄连解毒汤通过调控PTEN/PI3K/Akt通路抑制细胞凋亡,进而缓解急性肾损伤。

关键词：黄连解毒汤急性肾损伤炎症反应细胞凋亡磷酸酯酶与张力蛋白同源物/磷脂酰肌醇3-激酶/蛋白激酶B通路咖啡酸小檗碱黄芩素

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

镁合金表面镁铝锡类水滑石膜的制备及其耐蚀性

引用

材料热处理学报 2018年第9期39卷 93-98页

作者：张成李壮壮杨陆铭李阳阳巴志新王涛南京工程学院材料工程学院江苏南京211167 江苏省先进结构材料与应用技术重点实验室江苏南京211167

首先在Al^3＋/Sn^4＋前处理液中在GZ91K镁合金表面制得前驱体膜,随后在Na2CO3后处理液中将前驱体膜转化为镁铝锡类水滑石膜。利用扫描电镜（SEM）和X射线衍射（XRD）分析膜层的表面形貌和成分,利用极化曲线、交流阻抗和浸泡析氢实验评... 详细信息

首先在Al^3＋/Sn^4＋前处理液中在GZ91K镁合金表面制得前驱体膜,随后在Na2CO3后处理液中将前驱体膜转化为镁铝锡类水滑石膜。利用扫描电镜（SEM）和X射线衍射（XRD）分析膜层的表面形貌和成分,利用极化曲线、交流阻抗和浸泡析氢实验评价该转化膜的耐蚀性。结果表明：前后处理时间对前驱体膜及镁铝锡类水滑石膜的生长产生重要影响;当前处理时间为1 h.后处理时间为24 h.,制备的水滑石膜连续、致密,此时的腐蚀电流密度（8.2×10^-7A·cm^-2）约为基体（119.5×10^-7A·cm^-2）的1/14,提高了镁合金基体的耐蚀性。

关键词：镁合金三元水滑石转化膜耐蚀性

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

Simultaneous removal of Congo red and cadmium(Ⅱ) from aqueous solutions using graph.ne oxide–silica composite as a multifunctional adsorbent

引用

Journal of Environmental Sciences 2020年第12期32卷 151-160页

作者： Ebrah.m Mah.oudi Sepeh. Azizkh.ni Abdul Wah.b Moh.mmad Law Yong Ng Abdelbaki Benamor Wei Lun Ang Muneer ba-Abbad Department of Ch.mical and Process Engineering Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan Malaysia43600 BangiSelangor Darul EhsanMalaysia Department of Ch.mical and Environmental Engineering Faculty of EngineeringUniversiti Putra Malaysia43400 SerdangSelangorMalaysia Department of Ch.mical Engineering Lee Kong Chian Faculty of Engineering and ScienceUniversiti Tunku Abdul RahmanJalan Sungai LongBandar Sungai LongCheras43000 KajangSelangorMalaysia Centre for Sustainable Process Tech.ology(CESPRO) Faculty of Engineering and Built EnvironmentUniversiti Kebangsaan Malaysia43600 BangiSelangor Darul EhsanMalaysia Gas Processing Centre Qatar UniversityP.O.Box 2713DohaQatar

Graph.ne oxide is a very h.gh.capacity adsorbent due to its functional groups and π-π interactions with.oth.r compounds. Adsorption capacity of graph.ne oxide, h.wever, can be furth.r enh.nced by h.ving synergistic effects th.ough.th. use of mixed-matrix composite. In th.s study, silica-decorated graph.ne oxide(SGO) was used as a h.gh.efficiency adsorbent to remove Congo red(CR) and Cadmium(Ⅱ) from aqueous solutions. Th. effects of solution initial concentration(20 to 120 mg/l), solution ph.ph.2 to 7), adsorption duration(0 to 140 min) and temperature(298 to 323 K) were measured in order to optimize th. adsorption conditions using th. SGO adsorbent. Morph.logical analysis indicated th.t th. silica nanoparticles could be dispersed uniformly on th. graph.ne oxide surfaces. Th. maximum capacities of adsorbent for effective removal of Cd(Ⅱ) and CR were 43.45 and 333.33 mg/g based on Freundlich.and Langmuir isoth.rms, respectively. Langmuir and Freundlich.isoth.rms displayed th. h.gh.st values of Q max for CR and Cd(Ⅱ) adsorption in th.s study, wh.ch.indicated monolayer adsorption of CR and multilayer adsorption of Cd(II) onto th. SGO, respectively. Th.rmodynamic study sh.wed th.t th. enth.lpy( h. and Gibbs free energy( G) values of th. adsorption process for both.pollutants were negative, suggesting th.t th. process was spontaneous and exoth.rmic in nature. Th.s study sh.wed active sites of SGO( π-π, h.droxyl, carboxyl, ketone, silane-based functional groups) contributed to an enormous enh.ncement in simultaneous removal of CR and Cd(Ⅱ) from an aqueous solu-tion, Th.refore, SGO can be considered as a promising adsorbent for future water pollution control and removal of h.zardous materials from aqueous solutions.

关键词： Graph.ne-oxide Multifunctional adsorbent Competitive removal h.avy metal-dye removal

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

Potential Anti-cancer Activity of Furanodiene

引用

Ch.nese Journal of Cancer Research 2009年第2期21卷 154-158页

作者： Zh.n-zh.n ba Yan-ping Zh.ng h.i Zh.ng Xiu-yan Sun Dong-h.i Lin Sch.ol of Ph.rmaceutical Science Yantai University Yantai 264005 China

Objective： To study th. isolated from th. essential oil VIVO anti-tumor activities of furanodiene of th. rh.zome of Curcuma wenyujin （C15h.00）, a primary sesquiterpene compound Yh.Ch.n et C. Ling（Wen Ezh.）, in vitro and in Meth.ds： In vitro MTT assay was used to furth.r study th. effects of time and dosage on anti-proliferation of furanodiene against th. sensitive h.la, h.p-2, h.-60, U251 cells, based on th. cytotoxic effects of furanodiene on 12 h.man malignant tumor cell lines with.th. essential oil of Wen Ezh. as control., and th. h.lf-inh.bitory concentration （IC50） was observed. In vivo uterine cervix （U14） tumor cell was selected and th. conventional assay meth.d of anti-tumor activity was employed. Furanodiene liposome was administered intraperitoneally, and tumor-inh.bitory rate, th.mus and spleen indexes were observed. Results： Th. inh.bitive effects on cell proliferation were sh.wn in all of th. twelve cell lines and th. cytotoxic effects of furanodiene against h.la, h.p-2, h.-60, U251 cells were observed after 12 h.of administration, th. effect could last for at least 48 h.in a dose dependent manner, and th. IC50 values were 0.6, 1.7, 1.8, 7.0μg/ml, respectively. Furanodiene was also found to sh.w inh.bitive effects on th. proliferation of uterine cervix （U14） tumor induced in mice. Th. tumor inh.bition rates were 36.09% （40 mg/kg）, 41.55% （60 mg/kg）, 58.29% （80 mg/kg）, respectively. Conclusion： Furanodiene is one of primary anti-cancer active components in th. essential oil of Wen Ezh., and also a very effective agent against uterine cervix cancer, and h.s protection effect on th. immune function.

关键词： Essential oil of Wen Ezh. Furanodiene Anti-cancer Uterine cervix cancer

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：