检索结果-南通市图书馆

Dynamical evolution of Ge quantum dots on Si(111):From island formation to high temperature decay

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Aggregate

Aggregate 2022年第4期3卷 114-120页

作者： Navathej Preetha Genesh Fabrizio De Marchi Stefan Heun Stefano Fontana Rachid Belkhou Rahul Purandare Nunzio Motta Anna Sgarlata Massimo Fanfoni Jennifer MacLeod oliver MacLean Federico Rosei CentreÉnergie Matériaux et TélécommunicationsInstitut National de la Recherche ScientifiqueQuébecCanada NESt Istituto Nanoscienze-CNR and Scuola Normale SuperiorePisaItaly Sincrotrone trieste SCpA BasovizzaItaly LURE UniversitéParis-SudOrsay CedexFrance School of Chemistry and Physics and Centre for Materials Science Queensland University of TechnologyBrisbaneAustralia Dipartimento di Fisica Universitàdi Roma“Tor Vergata”RomeItaly Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education Jilin Normal UniversityChangchunP.R.China

Heteroepitaxial growth is a process of profound fundamental importance as well as an avenue to realize nanostructures such as Ge/Si quantum dots(QDs),with appealing properties for applications in opto-and ***,controlling the Ge/Si QD size,shape,and composition remains a major obstacle to their practical ***,Ge nanostructures on Si(111)were investigated in situ and in real-time by low energy electron microscopy(LEEM),enabling the observation of the transition from wetting layer formation to 3D island growth and *** island size,shape,and distribution depend strongly on the growth *** the deposition temperature increases,the islands become larger and sparser,consistent with Brownian nucleation and capture *** 550◦C,two distinct Ge/Si nanostructures are formed with bright and dark appearances that correspond to flat,atoll-like and tall,faceted islands,*** annealing,the faceted islands increase in size at the expense of the flat ones,indicating that the faceted islands are thermodynamically more *** contrast,triangular islands with uniform morphology are obtained from deposition at 600◦C,suggesting that the growth more closely follows the ideal *** annealing,the islands formed at 600◦C initially show no change in morphology and size and then rupture simultaneously,signaling a homogeneous chemical potential of the *** observations reveal the role of dynamics and energetics in the evolution of Ge/Si QDs,which can serve as a step towards the precise control over the Ge nanostructure size,shape,composition,and distribution on Si(111).

关键词： epitaxial growth GeSi heterostructures low energy electron microscopy

the anti-angiogenic and antibacterial effect of tinomiscium philippinense Miers.(Menispermaceae)leaf extract

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Coastal Life Medicine 2016年第1期4卷 61-68页

作者： Sheryl Rena-Aguila Mario A.tan oliver B.Villaflores the Graduate School University of Santo TomasManilaPhilippines College of Science University of Santo TomasManilaPhilippines Research Center for the Natural and Applied Sciences University of Santo TomasManilaPhilippines College of Nursing University of Santo TomasManilaPhilippines

Objective:to determine the toxicity profile,anti-angiogenic and antibacterial activity of the crude and semi-crude leaf extracts of tinomiscium philippinense(***).Methods:the leaves of *** were extracted with methanol and partitioned with solvents of different polarities,namely,hexane,dichloromethane and *** extracts were subjected to duck chorioallantoic membrane assay to establish its anti-angiogenic *** assay was utilized to determine the minimum inhibitory concentration and minimum bactericidal concentration of the different extracts of the ***:the dichloromethane leaf extract of *** at 1000μg/disc showed the highest anti-angiogenic activity with 37.46%*** the fractions exhibited a bacteriostatic and bactericidal effect on the three bacterial strains with Pseudomonas aeruginosa,a Gram negative lactose fermenter exhibiting a higher sensitivity to dichloromethane semi-crude extract among the treatment *** the toxicity test,no mortality and no change in behavior were observed in the Sprague-Dawley rats 14 days after the oral administration of the plant *** methanolic leaf extract of *** is non-toxic at a maximum dose of 5000 mg/***:the dichloromethane leaf extract of *** is a potential antiangiogenic endemic plant *** plant extract is also a potential antibacterial candidate as determined by microwell *** anti-angiogenic and antibacterial activity of the plant may be attributed to the essential oil,steroid,flavonoid,sterol and triterpene content of the plant.

关键词： tinomiscium philippinense Duck chorioallantoic membrane assay Antibacterial assay toxicity test

the Function Identification of the Candidate Disease-Resistance Gene in Cabbage

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Agricultural Sciences in China 2008年第3期7卷 314-320页

作者： CAO Bi-hao LEI Jian-jun XIANG Chen-bin CHEN Guo-ju ZENG Guo-ping David J. oliver ZHAO Shuang LU Ling-ling Horticulture Biotechnology Research Institute the Genetic and Quality hnproved Center of Vegetable South China Agricultural UniversityGuangzhou 510642 P.R.China Department of Botany lowa State University Ames lowa 50011 USA 不详

In order to understand the function of tuR2, a candidate disease-resistance gene was isolated from cabbage, we transformed it into mustard （Brassicajuncea L. Linshicaoyaozi） which was susceptible to tuMV through Agrobacterium tumefacine-mediated method. transgenic plants were detected by Southern blotting and Northern blotting. Our results confirmed that the tuR2 gene had been integrated into the mustard genome, and it showed different expression levels among primary transplants （t0）. the primary transplants （t0） and the first progenies of transgenic plants （t1） were inoculated with tuMV in a greenhouse. the transgenic plants had high tuMV-resistance, whereas the serious virus disease symptom was observed in CK （no transformation plants）. the tuR2 gene in the first progenies of transgenic plants （t1） showed dominant monogenic inheritance. Compared with CK, the progenies containing tuR2 gene had stronger resistance to tuMV. the tuR2 gene which was isolated from cabbage had the function of tuMV-resistance.

关键词： tuR2 gene function identification tuMV-resistance

StE460钢厚焊缝残余应力的中子衍射研究

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

原子能科学技术 2022年第3期56卷 419-426页

作者：刘荣灯陈东风刘蕴韬孙凯李眉娟 LI X hofmann M 李天富王子军余周香中国原子能科学研究院北京102413 慕尼黑工业大学德国慕尼黑85747

管道焊接残余应力是影响管道安全和使用寿命的关键因素。中子衍射是唯一无损检测厚钢焊缝结构完整性的方法。本文主要采用中子衍射谱仪,辅以显微镜和硬度分析仪研究40 mm厚StE460钢管钨极惰性气体保护焊得的焊缝的残余应力分布、微观形... 详细信息

管道焊接残余应力是影响管道安全和使用寿命的关键因素。中子衍射是唯一无损检测厚钢焊缝结构完整性的方法。本文主要采用中子衍射谱仪,辅以显微镜和硬度分析仪研究40 mm厚StE460钢管钨极惰性气体保护焊得的焊缝的残余应力分布、微观形貌、维氏硬度等。研究结果表明,焊缝的残余应力最高达670 MPa,非常接近StE460钢抗拉强度极限,而热影响区内的残余应力很小。全峰半高宽分析表明,焊缝区域塑性形变程度较低。整个焊缝不同区域的晶体显微照片表明其皆是均匀细晶。沿着焊缝方向和垂直焊缝方向的维氏硬度几乎一致,均在(200~250)HV0.2范围内。分析测试结果不仅满足工业应用里的电站基础结构建设和其他非破坏性残余应力评估装置校准的需求,并能增加对StE460钢厚截面焊缝的认知。

关键词：中子衍射残余应力残余应变 StE460钢焊接

飞行建筑物 NEtJEtS FALCON 7X

维普期刊数据库博看期刊

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

汽车生活 2009年第3期 18-23页

作者： oliver

法国Millau Viaduct大桥,雄壮瑰丽有若神迹,曾经让Norman Foster爵士的建筑实践成为可以在云雾间穿行的伟大事物。同样出自他手的首都机场t3,也每日吞吐着千百架飞行器。但是现在,Sir Norman Foster不再止步于天空事业的边缘,他亲手设... 详细信息

法国Millau Viaduct大桥,雄壮瑰丽有若神迹,曾经让Norman Foster爵士的建筑实践成为可以在云雾间穿行的伟大事物。同样出自他手的首都机场t3,也每日吞吐着千百架飞行器。但是现在,Sir Norman Foster不再止步于天空事业的边缘,他亲手设计了一架公务客机——NetJets Falcon 7X。

关键词：飞行体飞行器建筑物公务色调设计领域客户沟通交流作品制造企业

A General and Programmable Synthesis of Graphene-Based Composite Aerogels by a Melamine-Sponge-templated Hydrothermal Process

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CCS Chemistry 2020年第2期2卷 1-12页

作者： Jin Ge Hong-Wu Zhu Yuan Yang Yufang Xie Gang Wang Jin Huang Lu-An Shi oliver G Schmidt Shu-Hong Yu Division of Nanomaterials&Chemistry Hefei National Laboratory for Physical Sciences at the MicroscaleDepartment of ChemistryCAS Center for Excellence in NanoscienceInstitute of Biomimetic Materials and ChemistryUniversity of Science and Technology of ChinaHefei 230026China Institute for Integrative Nanosciences IFW Dresden01609 DresdenGermany Helmholtz-Zentrum Dresden-Rossendorf e.V. Institute of Ion Beam Physics and Materials Research01328 DresdenGermany Center for Advancing Electronics Dresden(cfaed)and Faculty of Chemistry and Food Chemistry Technische Universität Dresden01062 DresdenGermany

three-dimensional(3D)graphene networks are performance boosters for functional nanostructures in energy-related *** tremendous intriguing nanostructures-decorated 3D graphene networks have been realized,on-demand decoration of nanostructures in the specified position of interest within the whole 3D graphene skeleton is still out of reach,shedding limitations on constructing more sophisticated components with programmable structures which offer enormous potential for the enhancement of performance and exploration of new ***,we report the melamine-sponge(MS)-templated hydrothermal method capable of realizing reduced graphene oxide(RGO)-nanostructure composite aerogels with programmable structures and *** key of this method is using the MS template to preset the structures of choice through programmable solution-processed immobilization of graphene oxide(GO)and ***,the hydrothermal treatment simultaneously removed the MS template and reduced the GO networks without changing the preset *** showcased nine typical RGO-nanostructures composite aerogels to demonstrate the versatility of the MS-templated hydrothermal method.

关键词： 3D graphene graphene aerogel templated assembly macroscopic assembly nanostructures

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

历史上的身体

Distributed Analytics on Sensitive Medical Data:the Personal Health train

作者： (英)约翰·罗布(John Robb) (英)奥利弗·J.t. 哈里斯(oliver J.t. Harris)

来源：南通市图书馆图书评论

学校读者我要写书评

暂无评论

Data Intelligence 2020年第1期2卷 96-107,305,306,307页

作者： Oya Beyan Ananya Choudhury Johan van Soest oliver Kohlbacher Lukas Zimmermann Holger Stenzhorn Md.Rezaul Karim Michel Dumontier Stefan Decker Luiz Olavo Bonino da Silva Santos Andre Dekker Fraunhofer Institute for Applied Information technology(FIt) 53754 Sankt AugustinGermany RWtH Aachen University 52056 AachenGermany Department of Radiation Oncology(MAAStRO) GROW School for Oncology and Developmental BiologyMaastricht University Medical Center6200 MD MaastrichtThe Netherlands Institute of Data Science Maastricht UniversityUniversiteitssingel 60Maastricht 6229 ERThe Netherlands Department of Computer Science University of TübingenTubingenBaden-Württemberg 72076Germany Quantitative Biology Center University of TübingenTubingenBaden-Württemberg 72076Germany Institute for translational Bioinformatics University of TubingenTubingenBaden-Württemberg 72076Germany Center for Bioinformatics University of TübingenGermany GO FAIR International Support&Coordination Office(GFISCO) LeidenThe Netherlands

In recent years,as newer technologies have evolved around the healthcare ecosystem,more and more data have been *** analytics could power the data collected from numerous sources,both from healthcare institutions,or generated by individuals themselves via apps and devices,and lead to innovations in treatment and diagnosis of diseases;improve the care given to the patient;and empower citizens to participate in the decision-making process regarding their own health and ***,the sensitive nature of the health data prohibits healthcare organizations from sharing the *** Personal Health train(PHt)is a novel approach,aiming to establish a distributed data analytics infrastructure enabling the(re)use of distributed healthcare data,while data owners stay in control of their own *** main principle of the PHt is that data remain in their original location,and analytical tasks visit data sources and execute the *** PHt provides a distributed,flexible approach to use data in a network of participants,incorporating the FAIR *** facilitates the responsible use of sensitive and/or personal data by adopting international principles and *** paper presents the concepts and main components of the PHt and demonstrates how it complies with FAIR principles.

关键词： Distributed analytics Data reuse FAIR Health data Ethics and privacy

Solid-State NMR Spectroscopic Study of Chromophore-Protein Interactions in the Pr Ground State of Plant Phytochrome A

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

Molecular Plant 2012年第3期5卷 698-715页

作者： Chen Song Lars-oliver Essen Wolfgang Ga＇rtner Jon Hughes J6rg Matysik Leids Instituut voor Chemisch Onderzoek Universiteit Leiden PO Box 9502 2300 RA Leiden The Netherlands Fachbereich Chemie Philipps-Universita＇t Marburg Hans-Meerwein-Stral3e D-35032 Marburg Germany Max-Planck-lnstitut for Bioanorganische Chemie StiftstraBe 34-36 D-45470 MCu＇lheim an der Ruhr Germany Pflanzenphysiologie Justus-Liebig-Universita＇t SenckenbergstraBe 3 D-35390 Giessen Germany

Despite extensive study, the molecular structure of the chromophore-binding pocket of phytochrome A （phyA）, the principal photoreceptor controlling photomorphogenesis in plants, has not yet been successfully resolved. Here, we report a series of two-dimensional （2-D） magic-angle spinning solid-state NMR experiments on the recombi- nant N-terminal, 65-kDa PAS-GAF-PHY light-sensing module of phytochrome A3 from oat （Avena sativa）, assembled with uniformly 13C- and lSN-labeled phycocyanobilin （u-[13C,15N]-***3）. the Pr state of this protein was studied regarding the electronic structure of the chromophore and its interactions with the proximal amino acids. Using 2-D 13C-13C and 1HJSN experiments, a complete set of 13C and 15N assignments for the chromophore were obtained. Also, a large number of 1H-13C distance restraints between the chromophore and its binding pocket were revealed by inter- facial heteronuclear correlation spectroscopy. 13C doublings of the chromophore A-ring region and the C-ring carbox- ylate moiety, together with the observation of two Pr isoforms, Pr-I and Pr-II, demonstrate the local mobility of the chromophore and the plasticity of its protein environment. It appears that the interactions and dynamics in the binding pocket of phyA in the Pr state are remarkably similar to those of cyanobacterial phytochrome （Cphl）. the N-terminus of the region modeled （residues 56-66 of phyA） is highly mobile. Differences in the regulatory processes involved in plant and Cphl phytochromes are discussed.

关键词： solid-state NMR plant phytochrome chromophore-protein interaction signal transduction