检索结果-南通市图书馆

Flexible interdigitated layered framework with multiple accessible active sites for high-performance CH_(3)I capture

引用

Science China Chemistry 2024年第5期67卷 1569-1577页

作者： Bo Tai Baoyu Li Linwei He Zhonglin Ma Shujing Lin Mingxing Zhang junchang chen Fuqi Wu Long chen Xing Dai Fuyin Ma Zhifang Chai Shuao Wang 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 InstitutionsSoochow UniversitySuzhou 215123China

The development of adsorbent materials for effective capture of radioactive iodomethane(CH_(3)I) from the off-gas of used nuclear fuel reprocessing, remains a significant and challenging line of research because currently state-of-art adsorbents still suffer from low binding affinity with CH_(3)I. Here, we proposed a brand-new adsorption topological structure by developing a 2D interdigitated layered framework, named SCU-20, featuring slide-like channel with multiple active sites for CH_(3)I capture. The responsive rotating-adaptive aperture of SCU-20 enables the optimal utilization of all active sites within the pore for highly selective recognition and capture of CH_(3)I. A record-breaking CH_(3)I uptake capacity of 1.84 g/g was achieved under static sorption conditions with saturated CH_(3)I vapor. Both experimental and theoretical findings demonstrated that the exceptional uptake of SCU-20 towards CH_(3)I can be attributed to the confined physical electrostatic adsorption of F sites, coupled with the chemical nitrogen methylation reaction with uncoordinated N atoms of pyrazine. Moreover, dynamic CH_(3)I uptake capacity potentially allows for the capture of CH_(3)I in simulated real-world off gas reprocessing conditions. This study highlights the potential of SCU-20 as a promising candidate for efficient capture of iodine species and contributes to the development of effective solutions for radioactive iodine remediation.

关键词： 2D interdigitated layered framework iodomethane dual-sites electrostatic interaction physisorption and chemisorption

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

Influences of the tank liquid lateral sloshing and mass time-varying on high clearance self-propelled sprayer ride comfort

引用

International Journal of Agricultural and Biological Engineering 2024年第1期17卷 12-22页

作者： Liquan Lu junchang Zhang Cui Cui Jun chen Yu chen Hongling Jing Shuo Zhang Sugirbay Adilet chenwei Hu Jiayu Cao College of Mechanical and Electronic Engineering Northwest A&F UniversityYangling 712100ShaanxiChina Weifang Engineering Vocational College Weifang 261000ShandongChina Technical Faculty S.Seifullin Kazakh Agro Technical UniversityAstana 101400Kazakhstan

To explore the influence of the lateral sloshing and the time-varying mass of the liquid in the tank on the ride comfort of the high-clearance sprayer,a spring-mass-damping equivalent mechanics that can describe the lateral sloshing of the liquid under different filling ratios was constructed based on the equivalent criterion.The Fluent was used to simulate the moment acting on the wall of the tank by the lateral sloshing of the liquid,and then the parameters of the equivalent mechanical model are obtained by fitting and solving.Comparative analysis of Fluent simulation and bench test on lateral sloshing of tank liquid under different filling ratios.The results show that the lateral sloshing trend of the tank liquid level obtained from the Fluent simulation and the bench test was consistent,which proved the accuracy of the Fluent fluid simulation process and the correctness of the required equivalent mechanical model parameters.Incorporating a liquid sloshing equivalent model,a four-degree-of-freedom vertical dynamic model of the sprayer half-car was established.Subsequently,the performance of the sprayer was systematically analyzed and compared under the excitation of a bump road and a random E-level road.This investigation took into account varying liquid filling ratios of 10%,50%,and 90%.The focus lay on evaluating the vertical acceleration of the sprayer body,dynamic deflection of the suspension,and dynamic load on the tires in response to these road conditions.This analysis is conducted independently of the liquid sloshing factor.The results show that the lateral sloshing of the liquid medicine significantly reduces the ride smoothness of the machine,and makes the vibration response of the machine produce a certain hysteresis effect.With the reduction of the quality of the liquid medicine in the spray tank,the vibration amplitude of the sprayer body gradually decreases,the hysteresis effect is also gradually weakened.The results presented in this study offer a theoretical foundation for the analysis of ride

关键词： high clearance self-propelled sprayer liquid lateral sloshing ride comfort system dynamics simulation

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

Rational construction of CuFe_(2)O_(4)@C/Cd_(0.9)Zn_(0.1)S S-scheme heterojunction photocatalyst for extraordinary photothermal-assisted photocatalytic H_(2) evolution

引用

Journal of Energy Chemistry 2024年第5期92卷 240-249页

作者： Dong Zhang Minghui Zhu Ran Qin Peixian chen Maoye Yin Dafeng Zhang junchang Liu Hengshuai Li Xipeng Pu Peiqing Cai School of Physics Science and Information Technology Shandong Key Laboratory of Optical Communication Science and TechnologyLiaocheng UniversityLiaocheng 252000ShandongChina School of Materials Science and Engineering Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell TechnologyLiaocheng UniversityLiaocheng 252000ShandongChina College of Optical and Electronic Technology China Jiliang UniversityHangzhou 310018ZhejiangChina

Rational design of photocatalyst to maximize the use of sunlight is one of the issues to be solved in photocatalysis technology.In this study,the CuFe_(2)O_(4)@C/Cd_(0.9)Zn_(0.1)S(CFO@C/CZS)S-scheme photocatalyst with photothermal effect was synthesized by ultrasonic self-assembly combined with calcination.The dark CFO@C absorbed visible light and partly converted into heat to promote the hydrogen evolution reaction.The presence of heterojunctions inhibited the photogenerated electron-hole recombination.The graphite-carbon layer provided a stable channel for electron transfer,and the presence of magnetic CFO made recycle easier.Under the action of photothermal assistance and heterojunction,the hydrogen evolution rate of the optimal CFO@C/CZS was 80.79 mmol g^(-1) h^(-1),which was 2.55 times and 260.61 times of that of pure CZS and CFO@C,respectively.Notably,the composite samples also exhibit excellent stability and a wide range of environmental adaptability.Through experimental tests and first-principles simulation calculation methods,the plausible mechanism of photoactivity enhancement was proposed.This work provided a feasible strategy of photothermal assistance for the development of heterojunction photocatalysts with distinctive hydrogen evolution.

关键词： Photothermal effect S-scheme heterojunction Photocatalytic hydrogen evolution First-principles calculations

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

Radiation-induced one-pot synthesis of grafted covalent organic frameworks

引用

Science China Chemistry 2023年第6期66卷 1781-1787页

作者： Mingxing Zhang Mengjia Yuan Xiaofang Zhao junchang chen Linwei He Qianhong Gao Jiangtao Hu Guozhong Wu Zhifang Chai Shuao Wang 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 InstitutionsSoochow UniversitySuzhou 215123China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China School of Environmental and Biological Engineering Nanjing University of Science&TechnologyNanjing 210094China

Post-synthetic functionalization of covalent organic frameworks(COFs)is an alternative way to enhance and broaden their properties and potential applications.However,the chemical functionalization of COFs is a great challenge because traditional procedures are often time-and energy-consuming,while the crystallinity of COFs can be damaged under harsh conditions.Here we report the in-situ introduction of functional graft chains onto the skeleton of COFs during the synthesis process through the combination of radiation-induced synthesis and graft polymerization techniques under ^(60)Co gamma-ray radiation.The synthesis and functionalization of COFs are simultaneously accomplished in a chemical system under ambient conditions yielding a large number of different functionalized COFs.The obtained carboxyl-functionalized COFs exhibit excellent radioactive uranium removal capabilities from aqueous solution with fast uptake dynamics,high adsorption capacity,and excellent selectivity over other competing metal ions.

关键词： covalent organic frameworks gamma ray radiation one-pot synthesis grafting functionalization uranium adsorption

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

Superior Iodine Uptake Capacity Enabled by an Open Metal-Sulfide Framework Composed of Three Types of Active Sites

引用

CCS Chemistry 2023年第7期5卷 1540-1548页

作者： Yugang Zhang Linwei He Tingting Pan Jian Xie Fuqi Wu Xinglong Dong Xia Wang Lixi chen Shicheng Gong Wei Liu Litao Kang junchang chen Lanhua chen Long chen Yu Han Shuao Wang State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences(RAD-X)Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education InstitutionsSoochow UniversitySuzhou 215123 Advanced Membranes and Porous Materials(AMPM)Center Physical Sciences and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900 School of Life Sciences School of Civil EngineeringShaoxing UniversityShaoxing 312000 School of Environmental and Materials Engineering Yantai UniversityYantai 264005

Efficient adsorption of gaseous radioiodine is pivotal for the sustainable development of nuclear energy and the long-termradiation safety of the ecological system.However,state-of-the-art adsorbents(e.***.metal-organic frameworks and covalent-organic frameworks)currently under exploration suffer severely from limited adsorption capacity,especially under a real-world scenariowith extremely lowradioiodine concentration and elevated temperature.This mostly originates from the relatively weak sorption driving forces mainly determinedby the iodine-adsorbent interaction consistingof noncovalent interactionswith a small fraction of strong chemical bonding.Here,we document the discovery of an open metal-sulfide framework((NH_(4))_(2)(Sn_(3)S_(7)),donated as SCU-SnS)constructed by three different types of active sites as a superior iodine adsorbent.Benefiting from the ability of iodine for pre-enrichment into the framework by charge-balancing NH_(4)^(+)through N-H···I interaction,the efficient reduction of I^(2)affording I^(-)by S^(2-),and extremely high binding affinity between Sn_(4)^(+)and I^(-),SCU-SnS exhibit a record-breaking iodine adsorption capacity(2.12 g/g)under dynamic breakthrough conditions and the highest static capacity(6.12 g/g)among all reported inorganic adsorbents,both at 348 K.Its facile synthesis and low cost endow SCU-SnS with powerful application potential for the nuclear industry.

关键词： iodine metal-sulfide framework removal active sites dynamic adsorptio

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

Hyaluronic acid inhibited the upregulation of heat-shock protein 70 in human chondrocytes from osteoarthritis and Kashin-Beck disease

引用

BIOCELL 2019年第2期43卷 99-102页

作者： ZONGQIANG GAO XIONG GUO junchang chen chen DUAN Department of Orthopedics The Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’anShaanxi710004China Institute of Endemic Diseases Faculty of Public HealthCollege of MedicineXi’an Jiaotong UniversityKey Laboratory of Environment and Genes Related to DiseasesMinistry of EducationXi’anShaanxi710061China

This study aimed to investigate the effect of hyaluronic acid(HA)on the expression of heat-shock protein 70(HSP70)in chondrocytes isolated from patients with osteoarthritis(OA)and Kashin-Beck disease(KBD).The chondrocytes were collected from OA and KBD patients,and chondrocytes isolated from patients of accident injuries were used as the control.The chondrocytes were treated with HA at different doses.HSP70 expression in chondrocytes at both mRNA and protein levels was tested by PCR and Western blot analysis.Compared with control,both mRNA and protein levels of HSP70 were higher in chondrocytes from KBD and OA.However,HA at the dose of 500μg/mL significantly inhibited HSP70 expression levels in both KBD and OA groups(P<0.05).In conclusion,HSP70 is highly expressed in chondrocytes of patients of OA and KBD.HA intervention inhibits the upregulation of HSP70 in chondrocytes of OA and KBD patients and could be a promising agent for treatment of OA and KBD.

关键词： Hyaluronic acid Kashin-Beck disease Osteoarthritis Chondrocyte HSP70

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

地方政府招商引资行为新选择:基于第三方数智招商平台运行分析

引用

学习论坛 2024年第4期 55-64页

作者：杨志军陈俊昌贵州财经大学公共管理学院贵州贵阳550025

利用第三方数智招商平台助力地方政府招商引资是当前地方政府的普遍做法,既有研究对此类工具如何高效赋能地方政府招商引资的解释略显不足。选取A集团数智招商平台进行分析,以全生命周期平台和全过程桥接角色作为分析对象,研究发现:在... 详细信息

利用第三方数智招商平台助力地方政府招商引资是当前地方政府的普遍做法,既有研究对此类工具如何高效赋能地方政府招商引资的解释略显不足。选取A集团数智招商平台进行分析,以全生命周期平台和全过程桥接角色作为分析对象,研究发现:在全生命周期平台中,A集团数智招商平台所拥有的“一个中心+六个系统”的强大功能,完整覆盖招商引资的全生命周期,但对营商环境方面的服务却涉及过浅;在全过程桥接角色中,A集团与多方主体形成的上下级关系和合作关系,以及对外联动和对内协同的区域内招商关系网络和工作机制,为平台功能有效发挥赋予重要的外在条件,但涉及企业发展重大需求,如水、电、税收、土地、产业链、园区管理等要素保障和运营管理对接较少。基于此,应建立“链长制”招商思维,健全跨部门协同治理机制,完善产业研究与线索筛选,打造高素质招商人才队伍,开发移动端轻量招商平台,搭建数字平台生态系统等。

关键词：地方政府招商引资数智招商平台数字化治理

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

模体感知的自适应跨层游走社区检测

引用

计算机科学 2024年第6期51卷 128-134页

作者：王贝贝信俊昌陈金义王之琼东北大学计算机科学与工程学院沈阳110819 辽宁省大数据管理与分析重点实验室沈阳110819 东北大学医学与生物信息工程学院沈阳110819

近年来,利用高阶交互信息进行多层网络社区检测已成为复杂网络分析领域的研究热点。尽管多层网络社区检测的研究已取得了一些进展,但大多数方法忽略了网络各层之间的联系。为了解决这一问题,提出了一种模体(motif)感知的自适应跨层游走... 详细信息

近年来,利用高阶交互信息进行多层网络社区检测已成为复杂网络分析领域的研究热点。尽管多层网络社区检测的研究已取得了一些进展,但大多数方法忽略了网络各层之间的联系。为了解决这一问题,提出了一种模体(motif)感知的自适应跨层游走社区检测算法(Motif-aware Adaptive Cross-Layer random walk Community Detection,MACLCD)。该算法充分考虑了多层网络各层内的高阶交互特性以及层间的相关性,有效整合了多层网络的结构信息,提高了社区检测结果的准确性。具体地,首先从网络和节点的角度进行综合度量,揭示网络层间相关性;其次,考虑了各层网络可能具有不同的局部和全局结构特征,利用motif识别各层网络特有的高阶交互结构,构建多层加权混合阶网络;进一步,设计了多层网络跨层游走模型,并引入跳转因子,以确保随机游走能够自适应地遍历多层网络,从而捕获更丰富的网络结构信息。在4个真实的网络数据集上进行实验比较分析,结果表明MACLCD算法在社区检测方面性能较优,相比目前表现最佳的对比算法在ACC和NMI上分别提高了10%和8.9%。

关键词：社区检测多层网络高阶结构跨层随机游走 motif

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

高温矿井制冷降温管网解算及优化方法研究

引用

煤炭科学技术 2024年第2期52卷 150-158页

作者：马砺张雅婷刘尚明简俊常秦志华刘恒陈超扬西安科技大学安全科学与工程学院陕西西安710054 兖煤菏泽能化有限公司赵楼煤矿山东菏泽274705

高温矿井采用井下集中式制冷降温系统受采掘范围的影响,冷冻水输送管网复杂,导致末端冷量供给不足,严重影响系统降温效果。为提高矿井降温系统冷量利用率,以赵楼煤矿井下制冷降温管网为例,基于图论原理建立井下降温管网拓扑模型,采用水... 详细信息

高温矿井采用井下集中式制冷降温系统受采掘范围的影响,冷冻水输送管网复杂,导致末端冷量供给不足,严重影响系统降温效果。为提高矿井降温系统冷量利用率,以赵楼煤矿井下制冷降温管网为例,基于图论原理建立井下降温管网拓扑模型,采用水力基本方程计算管段流量、节点阻力和水力损失,得到降温管网水力特性;通过管网节点温升的计算,确定冷冻水输送过程的冷量损失;结合管网水力、热力特性,对降温管网进行优化。结果表明:赵楼煤矿井下制冷降温管网末端工作面冷冻水流量最小为0.001 m^(3)/s,管网水力损失大的位置为一集轨道下山、7302运输巷和中部辅运大巷。降温系统分别给五采区和七采区共4个工作面供冷,冷量损失为1.22×10^(6) J/s,其中七采区降温系统冷量损失占88.15%,管网摩擦和传热冷量损失分别为5.39×10^(5)、6.805×10^(5) J/s,末端冷冻水最高输水温度为13.9℃。提出管道-泵阀联调优化方法,采用动态平衡阀对南部1号辅助运输大巷和二集辅助巷冷冻水流量恒定在0.022~0.04 m^(3)/s,实现末端空冷器流量稳定;采用静态平衡阀调节管网支路阻力,将工作面冷冻水流量增大至0.005 m^(3)/s;南部1号辅助运输大巷、南部2号辅助运输大巷和二集辅助巷的管径增加至0.325 m,管网总水力损失从30.93 m减少到20.44 m,减少了35%;将离心泵扬程调整为183~195 m、流量为0.085~0.112 m^(3)/s,离心泵高效运行。

关键词：矿井降温制冷降温管网水力损失冷量损失

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

In vitro effects of sodium hyaluronate on the proliferation and the apoptosis in chondrocytes from patients with Kashin-Beck disease and osteoarthritis

引用

Journal of Nanjing Medical University 2009年第2期23卷 104-110页

作者： Zongqiang Gao Xiong Guo chen Duan Weijuan Ma Peng Xu Ruiyu Liu Qisheng Gu junchang chen Inslitute of Endemic Diseases Faculty of Public Health Key Laboratory of Environment and Genes Related to Diseases of Ministry of Education Medicine College of Xi' an Jiaotong University Xi' an 710061 China Department of Orthopedics Surgery the Second Affiliated Hospital of Xi' an Jiaotong University Xi' an 710061 China Shanghai Qisheng Biological preparation Co.Ltd Shanghai 201100 China

Objective：To identify the in vitro effects of sodium hyaluronate（HA） on the proliferation and the apoptosis of chondrocytes from patients with Kashin-Beck disease（KBD） and osteoarthritis（OA）. Methods：Samples of articular cartilages from KBD and OA patients, as well as healthy volunteers（6 subjects in each of the 3 groups） were dissected, digested with collagenase and the cells cultured in monolayers. Chondrocytes from each sample were assigned to an untreated group and two HA-treated groups： H0（no HA）, H100（HA, 0.1 g/L） and H500（HA, 0.5 g/L）. The first passage chondrocytes were used to observe proliferation using the MTT assay, and apoptosis by flow cytometry through Annexin V/PI staining. Results：HA promoted proliferation of chondrocytes in all the three groups, and.in KBD and OA groups, for cells cultured for 4 and 6 days, H500 significantly promoted the cell proliferation. The apoptotic rates of both KBD and OA group chondrocytes were in the order H500 〈 HA100 〈 H0. Conclusion：Sodium hyaluronate administration has a dosedependent in vitro effect to promote proliferation and inhibit apoptosis of chondrocytes from patients with KBD and OA.

关键词： sodium hyaluronate Kashin-Beck Disease（KBD） osteoarthritis chondrocyte proliferation apoptosis

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：