检索结果-南通市图书馆

Zeolites for the separation of ethylene,ethane,and ethyne

Frontiers of chemical Sc.ence and engineering 2024年第9期18卷 137-146页

作者： Binyu Wang Qiang Li Haoyang Zhang Jia-nan Zhang Qinhe Pan Wenfu Yan State Key Laboratory of Inorganic Synthesis&Preparative chemistry College of ChemistryJilin UniversityChangchun 130012China Key Laboratory of Advanced energy catalytic and Functional Materials Preparation College of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450012China Key Laboratory of Advanced Materials of Tropical Island Resources(Ministry of Education) School of Chemistry and Chemical EngineeringHainan UniversityHaikou 570228China

The cost-effective separation of ethylene(c_(2)H_(4)),ethyne(c_(2)H_(2)),and ethane(c_(2)H_(6))poses a significant challenge in the contemporary chemical *** contrast to the energy-intensive high-pressure cryogenic distillation process,zeolite-based adsorptive separation offers a low-energy *** review provides a concise overview of recent advancements in the adsorptive separation of c_(2)H_(4),c_(2)H_(2),and c_(2)H_(6)using zeolites or zeolite-based *** commences with an examination of the industrial significance of these compounds and the associated separation ***,it systematically examines the utilization of various types of zeolites with diverse cationic species in such separation *** then it explores how different zeolitic structures impact adsorption and separation capabilities,considering principles such as cation-πinteraction,π-complexation,and steric separation concerning c_(2)H_(4),c_(2)H_(2),and c_(2)H_(6)***,it discusses methods to enhance the separation performance of zeolites and zeolite-based adsorbents,encompassing structural design,modifications,and ion exchange ***,it summarizes current research trends and future directions,highlighting the potential application value of zeolitic materials in the field of c_(2)H_(4),c_(2)H_(2),and c_(2)H_(6)separation and offering recommendations for further investigation.

关键词： zeolite ethylene ethane cation-πinteraction π-complexation

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

Nomogram model including LATS2 expression was constructed to predict the prognosis of advanced gastric cancer after surgery

引用

World Journal of Gastrointestinal Surgery 2024年第2期16卷 518-528页

作者： nan Sun Bi-Bo Tan Yong Li Department of Blood Transfusion The Fourth Hospital of Hebei Medical UniversityShijiazhuang 050011Hubei ProvinceChina Third Department of General Surgery the Fourth Hospital of Hebei Medical UniversityShijiazhuang 050011Hebei ProvinceChina

BAcKGROUND Gastric cancer is a leading cause of cancer-related deaths *** assessments are typically based on the tumor-node-metastasis(TNM)staging system,which does not account for the molecular heterogeneity of this ***2,a tumor suppressor gene involved in the Hippo signaling pathway,has been identified as a potential prognostic biomarker in gastric *** To construct and validate a nomogram model that includes LATS2 expression to predict the survival prognosis of advanced gastric cancer patients following ra-dical surgery,and compare its predictive performance with traditional TNM *** A retrospective analysis of 245 advanced gastric cancer patients from the Fourth Hospital of Hebei Medical University was *** patients were divided into a training group(171 patients)and a validation group(74 patients)to deve-lop and test our prognostic *** performance of the model was determined using c-indices,receiver operating characteristic curves,calibration plots,and decision *** The model demonstrated a high predictive accuracy with c-indices of 0.829 in the training set and 0.862 in the validation *** under the curve values for three-year and five-year survival prediction were significantly robust,suggesting an excellent discrimination *** plots confirmed the high concordance between the predictions and actual survival *** We developed a nomogram model incorporating LATS2 expression,which significantly outperformed conven-tional TNM staging in predicting the prognosis of advanced gastric cancer patients *** model may serve as a valuable tool for individualized patient management,allowing for more accurate stratification and im-proved clinical *** validation in larger patient cohorts will be necessary to establish its generaliza-bility and clinical utility.

关键词： Gastric cancer LATS2 column line graph Prognosis Advanced gastric cancer survival Molecular biomarkers Predictive analytics in oncology Survival analysis

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

Autophagy and its role in gastrointestinal diseases

引用

World Journal of Gastroenterology 2024年第36期30卷 4014-4020页

作者： Bo-Zong Shao Wen-Gang Zhang Zhen-Yu Liu en-Qiang Linghu Department of Gastroenterology First Medical Center of Chinese People’s Liberation Army General HospitalBeijing 100853China

Gastrointestinal disorders encompass a spectrum of conditions affecting various organs within the digestive system,such as the esophagus,stomach,colon,rectum,pancreas,liver,small intestine,and bile *** role of autophagy in the etiology and progression of gastrointestinal diseases has garnered significant *** paper seeks to evaluate the impact and mechanisms of autophagy in gastrointestinal disorders by synthesizing recent research ***,we delve into inflammation-related gastrointestinal conditions,including ulcerative colitis,crohn’s disease,and pancreatitis,as well as gastrointestinal cancers such as esophageal,gastric,and colorectal ***,we provide commentary on a recent publication by chang et al in the World Journal of *** objective is to offer fresh perspectives on the mechanisms and therapeutic approaches for these gastrointestinal *** review aims to offer new perspectives on the mechanisms and therapeutic strategies for gastrointestinal disorders by critically analyzing relevant *** discussed,the role of autophagy in gastrointestinal diseases is complex and,at times,*** harness the full therapeutic potential of autophagy in treating these conditions,more in-depth research is imperative.

关键词： Autophagy Inflammation cancer Inflammatory bowel disease Pancreatitis

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

Rapidly growing primordial black holes as seeds of the massive high-redshift JWST Galaxies

引用

Sc.ence china(Physics,Mechanics & Astronomy) 2024年第10期67卷 139-146页

作者： Guan-Wen Yuan Lei Lei Yuan-Zhu Wang Bo Wang yi-ying Wang chao c.en Zhao-Qiang Shen yi-Fu cai yi-Zhong Fan Key Laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China School of Astronomy and Space Sc.ence University of Science and Technology of ChinaHefei 230026China Institute of High energy Physics Chinese Academy of SciencesBeijing 100049China Deep Space Exploration Laboratory/Department of Astronomy School of Physical SciencesUniversity of Science and Technology of ChinaHefei 230026China Jockey club Institute for Advanced Study The Hong Kong University of Science and TechnologyHong KongChina

A group of massive galaxies at redshifts of z■7 have been recently detected by the James Webb Space Telescope(JWST),which were unexpected to form at such an early time within the standard Big Bang *** this work,we propose that this puzzle can be explained by the presence of some primordial black holes(PBHs)with a mass of~1000M_(⊙).These PBHs act as seeds for early galaxy formation with masses of~10^(8)-10^(10)M_(⊙)at high redshift,hence accounting for the JWST *** use a hierarchical Bayesian inference framework to constrain the PBH mass distribution models,and find that the Lognormal model with the M_(c)~750M_(⊙)is preferred over other *** rapidly growing BHs are expected to have strong radiation and may appear as high-redshift compact objects,similar to those recently discovered by *** we focused on PBHs in this work,the bound on the initial mass of the seed black holes remains robust even if they were formed through astrophysical channels.

关键词： primordial black hole dark matter halo black hole accretion primordial galaxies

来源：

维普期刊数据库

同方期刊数据库

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

Martensite decomposition under thermal-mechanical coupling conditions to fabricate an ultrafine-grained Ti6Al4Mo4Zr1W0.2Si alloy

引用

Journal of Materials Sc.ence & Technology 2024年第1期168卷 157-168页

作者： Taoyu Zhou Jiuxu Yang nan Li Hao Sun Bohua Zhang Zibo Zhao Qingjiang Wang Shi-changxu Innovation center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Sc.ence and engineering University of Science and Technology of ChinaShenyang 110016China

The fabrication of ultrafine-grained microstructures(grain size below 1μm)in titanium alloys is beneficial for improving their mechanical properties at room temperature and medium tempera-tures(400-550°c).However,a long-standing challenge involves the low-cost manufacturing of bulk ultrafine-grained titanium *** this work,we developed a facile strategy through martensite de-composition at thermal-mechanical coupling conditions,to fabricate an equiaxed microstructure in a Ti6Al4Mo4Zr1W0.2Si model alloy with an averageαgrain size of 315±62 *** formation of the ultrafine-grained microstructure was because the lattice strain stored in the martensitic initial mi-crostructure enhanced the nucleation rate of dynamic recrystallization,meanwhile,the pinning role of martensite decomposition productsβand(Ti,Zr)_(5)Si_(3)phases suppressed grain coarsening at high *** to conventional(α+β)alloys,the tensile strength of this alloy improved by 20%-30%at both room temperature and 550°c,without decreasing its *** situ SEM observations revealed that the ultrafine-grained microstructure would not only suppress dislocation motions but also contribute to the homogenous deformation in the matrix of the material,therefore,it resulted in higher mechanical *** research results may be of great significance to the development of next-generation aviation titanium alloys.

关键词： Ultrafine-grained Titanium alloy In situ observation Deformation mechanism Thermostability

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

Electrocatalytic cO2 reduction to syngas

引用

Green energy & environment 2024年第7期9卷 1085-1100页

作者： Bing chang Zhaojun Min Ning Liu nan Wang Maohong Fan Jing Fan Jianji Wang School of environment Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control Ministry of Education Henan Normal University School of chemistry and chemical engineering Key Laboratory of Green Chemical Media and Reactions Ministry of Education Henan Normal University college of engineering and Physical Sc.ences and School of Energy Resources University of Wyoming college of engineering Georgia Institute of Technology

While carbon dioxide （cO2） is a major greenhouse gas,it is also an important c1 *** the trend of energy conservation and emission reduction,electrocatalytic reduction has become a very promising strategy for cO2utilization because it can convert cO2directly to high-valued chemicals and fuels under mild *** particular,the product cO and by-product H2can be combined into syngas by an electrocatalytic cO2reduction reaction （cO2RR） in an aqueous *** molar ratios of cO and H2may be used to produce essential bulk chemicals or liquid fuels such as methanol,alkanes,and olefins through thermochemical catalysis,Fischer–Tropsch synthesis,microbial fermentation,and other *** work discusses the latest strategies in controlling the molar ratio of cO/H2and improving the yield of *** challenges of electrocatalytic syngas production are analyzed from an industrial application perspective,and the possible measures to overcome them are proposed in terms of new catalyst design,electrolyte innovation,flow reactor optimization,anodic reaction coupling,and operando technique application.

关键词： Electrocatalysis cO 2 reduction Syngas Electrolyte Electrolyzer

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

MnS–MnO heterogeneous nanocube@N,S-doped carbon as a highly effic.ent bifunctional water splitting electrocatalyst

引用

Rare Metals 2024年第5期43卷 1977-1988页

作者： Xue-Qian Wang Xiang-ying Ma Wang-Zhi Wu Hui-Bing He nan-nan Wang Ren-Ji Zheng Shao-Jian Ma Yan-Qiu Zhu Pei-Kang Shen Jin-Liang Zhu School of Resources Environment and MaterialsState Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite StructuresCollege of Chemistry and Chemical EngineeringGuangxi UniversityNanning 530004China School of chemistry and chemical engineering Guangxi MinzuUniversity Nanning 530006 China School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China

A stable,effic.ent,and economical bifunctional electrolytic catalyst would be incredibly beneficial for the development of hydrogen production by electrocatalytic water *** this study,we synthesized a novel MnS–MnO heterogeneous nanocube@N,S-doped carbon(MnS–MnO@NSc).MnS–MnO nanocubes possess rich heterogeneous interfaces and plentiful catalytic active sites to promote electrochemical reactions,while the N,S-doped carbon shell possesses excellent conductivity and catalytic properties and protects the ***–MnO@NSc exhibited excellent electrochemical properties as an effective bifunctional electrocatalyst for the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)in KOH *** the HER,the overpotential was as low as 124 mV at a current density of 10 mA·cm^(-2)while in the OER,it was only 340 mV at 100 mA·cm^(-2)under the same *** addition,a MnS–MnO@NSc||MnS–MnO@NSc electrolyzer exhibited almost comparable activity and higher steadiness than those exhibited by the state-of-the-art Pt/c||RuO_(2)/c system for full water splitting in KOH solution.

关键词： Manganese sulfide Manganese oxide Doped carbon Heterogeneous nanocube Water splitting

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

Well-dispersed Sb particles embedded on N-doped carbon nanofibers toward high-performance Li-ion battery

引用

Rare Metals 2024年第7期43卷 2994-3006页

作者： ying Li yi-Han Zhao Lu-Lu Zhao Peng-Fei Wang ying Xie Ting-Feng yi School of Materials Sc.ence and engineering Northeastern UniversityShenyang 110819China Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province School of Resources and MaterialsNortheastern University at QinhuangdaoQinhuangdao 066004China Key Laboratory of Functional Inorganic Material chemistry Ministry of EducationSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080China

The alloy-type material Sb is widely used in the anode materials of lithium-ion batteries(LIBs)due to its high theoretical specific ***,its serious volume expansion problem during alloying/dealloying of Li~+limits its practical *** this work,c-Sb composite was constructed as anode material of LIBs by electrospinning route for the first time,Sb was introduced into the polyacrylonitrile-based hard carbon and coal tar pitch-based soft carbon composite amorphous carbon fiber with a diameter of 300-600 nm,which realized high cycling *** c-Sb-2(the mass ratio of polyacrylonitrile to Sb source is 1:2)electrode displayed charge capacities of 1098.5,930.3,841.7,753.5,643.9 and 545.8 mAh·g^(-1)at 0.1,0.2,0.3,0.5,1 and 2 A·g^(-1),*** when the current density returned to 0.1 A·g^(-1),the charge capacity was 939.3 mAh·g^(-1),revealing good stability and *** introduction of Sb into the amorphous carbon improved its conductivity and addressed the volume expansion issue of high specific capacity Sb during charge/***-situ XRD analysis confirmed the high reversibility of the c-Sb-2 during charging and *** functional theory(DFT)calculations revealed the gradual enhancement of the interface interaction between Sb_(x)Li_(y) and amorphous carbon(AMc)with increasing lithium content,contributing to the anchoring of alloy nanoparticles on the AMc surface and buffering the volume change of the ***,the gradual lithiation of Sb facilitated the electron transfer from Sb_(x)Li_(y) to *** findings hold promise for designing lithium storage materials with exceptional performance,highlighting the potential of c-Sb composites as anode materials for effic.ent next-generation lithium storage.

关键词： Li-ion battery Metallic Sb carbon Electrospinning cycling stability

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

Ore Geology,H-O-c Isotopes and 40Ar-39Ar Dating of the Wutonggou Iron Deposit,Eastern Tianshan,NW china:Implications for the Source,Timing,and Genesis of Hydrothermal Mineralization in a Sedimentary Iron Deposit

引用

Journal of Earth Sc.ence 2024年第4期35卷 1170-1185页

作者： chun-Long Wang yi-Tian Wang State Key Laboratory of Geological Processes and Mineral Resources Collaborative Innovation Center for Exploration of Strategic Mineral ResourcesSchool of Earth ResourcesChina University of GeosciencesWuhan430074China MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing100037China

The Wutonggou iron deposit is located in the well-known iron metallogenic belt in the eastern Tianshan,NW china,and has been regarded as a sedimentary iron *** hydrothermal overprinting could play indispensable roles in the formation of high-grade iron ores in sedimentary iron deposits,previous studies mainly focused on sedimentary-related iron mineralization,while the nature and contribution of hydrothermal fluids are poorly ***,an integrated study of ore geology,H-O-c isotopes and^(40)Ar-^(39)Ar dating,is conducted on the Wutonggou deposit,in order to reveal the features,source,and timing of hydrothermal *** studied deposit includes two mining sections namely the Jianshan and ***δ^(18)O values of early magnetite from the Jianshan section range from+3.0‰to+5.8‰that nearly consistent with classic magmatic magnetite,while increase to 6.3‰-8.0‰in the late *** from the two sections shows comparable H-O isotopic compositions and identical fractionation trends,and is plotted in or periphery to the primary magmatic water *** from the two sections are broadly similar in carbon and oxygen isotopic compositions,and siderite from the Wutonggou section is plotted in the same ***,comparable stable isotopic compositions and evolution trends indicate similar magmatic fluids contributed hydrothermal iron mineralization in the two mining ***,water-rock interactions of varying degrees generated distinct mineralization styles in the Jianshan and Wutonggou sections,and caused the isotopic fractionation in late *** extracted from a hydrothermal siderite ore yielded a^(40)Ar-^(39)Ar plateau age of 299.5±2.0 Ma,indicates the timing of hydrothermal iron mineralization is corresponding to the emplacement of vicinity *** together,the hydrothermal mineralization in the Wutonggou iron deposit was the product of remobilization and upgrading of early sedimentary iron ores,a

关键词： iron deposits H-O-c isotopes 40Ar-39Ar dating sedimentary iron deposits Wutonggou iron deposit eastern Tianshan

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

Voidage correction method for DEM study of 3D pebble flows in a bed of cycloidal base

引用

PARTIcUOLOGY 2024年第10期93卷 30-40页

作者： Xia, Zirui Shi, Minglei Zou, Quan Gui, nan Yang, Xingtuan Tu, Jiyuan Jiang, Shengyao Tsinghua Univ Inst Nucl & New Energy Technol Collaborat Innovat Ctr Adv Nucl Energy Technol Key Lab Adv Reactor Engn & SafetyMinist Educ Beijing 100084 Peoples R China Tsinghua Univ Dept Engn Phys Beijing 100084 Peoples R China Tsinghua Univ Dept Automat Beijing 100084 Peoples R China RMIT Univ Sch Engn Melbourne Vic 3083 Australia

Voidage (porosity or void fraction) in packed particles (or pebbles) is of fundamental importance in calculating the pressure drop, obtaining the drag, predicting the bed permeability, estimating the neutron streaming, etc. For the case when particles are deformed, a method of voidage correction during the packing state is proposed using a Discrete Element Method (DEM) simulation of 3D pebble flow inside a bed of cycloidal base. A function to evaluate the remaining volume of a pebble intercepted by horizontal and vertical planes is proposed for voidage calculation. After that, the process of solving voidage distribution is provided in detail. Using this method, the voidage inside the cycloidal-base pebble bed is obtained to refer to reported similar data for validation. This method can be potentially used for dynamical voidage calculation in cFD-DEM simulation which can get suitable voidage distribution after the correction. (c) 2024 chinese Society of Particuology and Institute of Process engineering, chinese Academy of Sc.ences. Published by Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

关键词： Voidage Pebble flow Packed bed Discrete element method cycloidal base KD-Tree Volume correction RADIAL POROSITY GAS MODEL SIMULATION PAcKINGS SPHERES

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

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：