检索结果-南通市图书馆

维普期刊数据库

Electrochemical Realization of 3D Interconnected MoS_(3)/PPy Nanowire Frameworks as Sulfur-Equivalent Cathode Materials for Li-S Batteries

在线全文

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2024年第2期7卷 9-17页

作者： Hongtao Yu Andreas siebert Shilin Mei Raul garcia-Diez Roberto Félix Ting Quan Yaolin Xu Johannes Frisch Regan g.Wilks Marcus Bär Chun Pei Yan Lu Department for Electrochemical Energy Storage Helmholtz-Zentrum Berlin für Materialien und Energie GmbH(HZB)Hahn-Meitner Platz 114109 BerlinGermany guangdong Province Key Laboratory of Durability for Marine Civil Engineering School of Civil EngineeringShenzhen UniversityShenzhenGuangdong 518060China Department of Interface Design HZBAlbert-Einstein-Str.1512489 BerlinGermany Energy Materials In-Situ Laboratory Berlin(EMIL) Albert-Einstein-Str.1512489 BerlinGermany Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy(HI ERN) Albert-Einstein-Str.1512489 BerlinGermany Department of Chemistry and Pharmacy Friedrich-Alexander-Universität Erlangen-NürnbergEgerlandstr.391058Erlangen Germany Institute of Chemistry University of Potsdam14467Potsdam Germany

The development of freestanding and binder-free electrode is an effective approach to perform the inherent capacity of active materials and promote the mechanism study by minimizing the interference from ***,we construct a freestanding cathode composed of MoS_(3)/PPy nanowires(NWs)deposited on porous nickel foam(NF)(MoS_(3)/PPy/NF)through electrochemical methods,which can work efficiently as sulfur-equivalent cathode material for Li-S *** structural stability of the MoS_(3)/PPy/NF cathode is greatly enhanced due to its significant tolerance to the volume expansion of MoS_(3)during the lithiation process,which we ascribe to the flexible 3D framework of PPy NWs,leading to superior cycling performance compared to the bulk-MoS_(3)/NF *** the interference of binder and carbon additives,the evolution of the chemical and electronic structure of Mo and S species during the discharge/charge was studied by X-ray absorption near-edge spectroscopy(XANES).The formation of lithium polysulfides was excluded as the driving cathode reaction mechanism,suggesting the great potential of MoS_(3)as a promising sulfur-equivalent cathode material to evade the shuttle effect for Li-S *** present study successfully demonstrates the importance of structural design of freestanding electrode enhancing the cycling performances and revealing the corresponding mechanisms.

关键词： 3D-Network electrochemical lithium-sulfur battery MoS_(3) PPy

维普期刊数据库

In Silico Study on Sulfated and Non-Sulfated Carbohydrate Chains from Proteoglycans in Cnidaria and Their Interaction with Collagen

在线全文

学校读者我要写书评

暂无评论

Open Journal of Physical Chemistry 2012年第2期2卷 123-133页

作者： Thomas Eckert Sabine Stotzel Monika Burg-Roderfeld Judith Sewing Thomas Lütteke Nikolay E.Nifantiev Johannes F.g.Vliegenthart Hans-Christian siebert Institut für Biochemie und Endokrinologie Veterinarmedizinische FakultatJustus-Liebig-UniversitätGieBenGermany Klinik für geburtshilfe Gynakologie und AndrologieVeterinarmedizinische FakultatJustus-Liebig-UniversitatGieBenGermany Coastal Research&Management Kiel-HoltenauGermany Institut fur Virologie und Zellbiologie Lübeck UniversitatLubeckGermany N.D.Zelinsky Institute of Organic Chemistry Russian Academy of SciencesMoscowRussian Federation Department of Bio-Organic Chemistry Bijvoet Center for Biomolecular ResearchUtrecht UniversityUtrechtThe Netherlands RI-B-NT-Research Institute of Bioinformatics and Nanotechnology KielGermany

Proteoglycans and collagen molecules are interacting with each other thereby forming various connective tissues. The sulfation pattern of proteoglycans differs depending on the kind of tissue and/or the degree of maturation. Tissues from Cnidaria are suitable examples for exploration of the effects in relation to the presence and the absence of sulfate groups, when studying characteristic fragments of the long proteoglycan carbohydrate chains in silico. It has been described that a non-sulfated chondroitin appears as a scaffold in early morphogenesis of all nematocyst types in Hydra. On the other hand, sulfated glucosaminoglycans play an important role in various developmental processes of Cnidaria. In order to understand this biological phenomenon on a sub-molecular level we have analysed the structures of sulfated and non-sulfated proteoglycan carbohydrate chains as well as the structure of diverse collagen molecules with computational methods including quantum chemical calculations. The strong interactions between the sulfate groups of the carbohydrates moieties in proteoglycans and positively charged regions of collagen are essential in stabilizing various Cnidaria tissues but could hinder the nematocyst formation and its proper function. The results of our quantum chemical calculations show that the sulfation pattern has a significant effect on the conformation of chondroitin structures under study.

关键词： Quantum Chemical Calculations Proteoglycans Collagen Atom Force Microscopy Cnidaria

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

砂岩中骨架颗粒溶解的理论

地质科技通报 1987年第3期 85-94页

作者： R.M.siebert ,g.K.Moncure ,R.W.Lahann ,李蕙生

我们发现,长石和岩屑骨架颗粒的溶解作用(FgD)对于可溶颗粒大于10%的砂岩的储集性来说具有重要意义。据集些储集砂岩的研究,其骨架颗粒溶解孔隙度可高达70%左右,其平均孔隙度约为可见孔隙的30%。骨架颗粒溶解作用不能明显地增加储层的... 详细信息

我们发现,长石和岩屑骨架颗粒的溶解作用(FgD)对于可溶颗粒大于10%的砂岩的储集性来说具有重要意义。据集些储集砂岩的研究,其骨架颗粒溶解孔隙度可高达70%左右,其平均孔隙度约为可见孔隙的30%。骨架颗粒溶解作用不能明显地增加储层的渗透率。但是,我们发现,骨架颗粒溶解孔隙度的发育数量是砂岩原始渗透率的函数。我们认为,页岩中的粘土及有机成熟作用为骨架颗粒溶解产生了必要的水、酸及络合剂。骨架颗粒溶解的溶剂被排驱至砂岩中,在那里长石和岩屑被溶解了,而且由此产生的溶解铝被络合,并搬运至砂岩之外。

关键词：砂岩岩屑储集性碎屑岩骨架颗粒孔隙率孔隙度溶解作用架状硅酸盐矿物长石页岩渗透率

Tango Controls and data pipeline for petawatt laser experiments

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

High Power Laser Science and Engineering 2023年第4期 6-12页

作者： Nils Wei?e Leonard Doyle Johannes gebhard Felix Balling Florian Schweiger Florian Haberstroh Laura D.geulig Jinpu Lin Faran Irshad Jannik Esslinger Sonja gerlach Max gilljohann Vignesh Vaidyanathan Dennis siebert Andreas Münzer gregor Schilling J?rg Schreiber Peter g.Thirolf Stefan Karsch Andreas D?pp Ludwig-Maximilians-Universit?t München

The Centre for Advanced Laser Applications in garching, germany, is home to the ATLAS-3000 multi-petawatt laser,dedicated to research on laser particle acceleration and its applications. A control system based on Tango Controls is implemented for both the laser and four experimental areas. The device server approach features high modularity,which, in addition to the hardware control, enables a quick extension of the system and allows for automated data acquisition of the laser parameters and experimental data for each laser shot. In this paper we present an overview of our implementation of the control system, as well as our advances in terms of experimental operation, online supervision and data processing. We also give an outlook on advanced experimental supervision and online data evaluation ± where the data can be processed in a pipeline ± which is being developed on the basis of this infrastructure.

关键词：

Tango Controls and data pipeline for petawatt laser experiments

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

High Power Laser Science and Engineering 2023年第4期11卷 2-8页

作者： Nils Weiße Leonard Doyle Johannes gebhard Felix Balling Florian Schweiger Florian Haberstroh Laura D.geulig Jinpu Lin Faran Irshad Jannik Esslinger Sonja gerlach Max gilljohann Vignesh Vaidyanathan Dennis siebert Andreas Münzer gregor Schilling Jörg Schreiber Peter g.Thirolf Stefan Karsch Andreas Döpp Ludwig-Maximilians-Universität München GarchingGermany

The Centre for Advanced Laser Applications in garching,germany,is home to the ATLAS-3000 multi-petawatt laser,dedicated to research on laser particle acceleration and its applications.A control system based on Tango Controls is implemented for both the laser and four experimental *** device server approach features high modularity,which,in addition to the hardware control,enables a quick extension of the system and allows for automated data acquisition of the laser parameters and experimental data for each laser *** this paper we present an overview of our implementation of the control system,as well as our advances in terms of experimental operation,online supervision and data *** also give an outlook on advanced experimental supervision and online data evaluation–where the data can be processed in a pipeline–which is being developed on the basis of this infrastructure.

关键词： data processing high-power laser experiments laser-plasma acceleration online diagnostics

综述和研究进展:pH值对胶体稳定性和啤酒稳定的影响

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

中外酒业 2018年第21期 59-70页

作者：张凤杰(译) 中国食品发酵工业研究院

pH对含有大量浑浊活性(HA)蛋白质和浑浊活性(HA)多酚的模拟体系和啤酒中浑浊的产生都有显著的影响。当pH略高于4时,能够观察到最强烈的浑浊度,且随着酒精度含量变化而轻微变化。在啤酒成熟过程中,pH促进了HA物质的去除,以致啤酒具有更... 详细信息

pH对含有大量浑浊活性(HA)蛋白质和浑浊活性(HA)多酚的模拟体系和啤酒中浑浊的产生都有显著的影响。当pH略高于4时,能够观察到最强烈的浑浊度,且随着酒精度含量变化而轻微变化。在啤酒成熟过程中,pH促进了HA物质的去除,以致啤酒具有更好的胶体稳定性。浑浊活性蛋白质(明胶或鱼胶)或浑浊活性多酚(例如:单宁酸)的澄清效果同样受到pH的相似影响,且在pH为4.3左右影响效果最大。本研究分析评估啤酒pH对胶体稳定性影响的因素,发现在蛋白质与多酚结合最强烈的pH值下,低吸附剂量的硅胶和PVPP作用效果并不明显。这可能是因为蛋白质和多酚强烈的结合与HA物质与吸附剂之间的结合两者相互竞争。

关键词：吸附剂澄清剂浑浊多元酚蛋白质

维普期刊数据库