检索结果-南通市图书馆

The core-merging giant impact in Earth's accretion history and its implications

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Geochimica 2022年第4期41卷 553-567页

作者： You Zhou Yun Liu Christian reinhardt Hongping Deng International Research Center for Planetary Sciences College of Earth SciencesChengdu University of TechnologyChengdu610059China State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang550081China CAS Center for Excellence in Comparative Planetology HefeiChina Center for Theoretical Astrophysics and Cosmology Institute for Computational ScienceUniversity of ZurichWinterthurerstrasse 1908057ZurichSwitzerland Department of Applied Mathematics and Theoretical Physics Centre for Mathematical SciencesUniversity of CambridgeWilberforce RoadCambridgeCB30WAUK

The Earth’s accretion process is accompanied by a large number of *** is widely accepted that collisions dominate the Earth’s late accretion *** all these collisions,there is a special type of collision called Core-merging giant impact(CMGI),in which much or most the impactor’s core merges directly with the protoEarth’s *** core-merging scenario plays an important role in the Earth’s accretion process and deeply affects the formation of the Earth’s core and ***,because CMGI is a small probability event,it has not been fully *** we use the SPH method to comprehensively study all possible CMGIs in the Earth’s accretion *** find that CMGI only occurs in the initial conditions with small impact angle,small impact velocity and big *** further discuss the implications of *** are confident that CMGI inevitably causes the chemical disequilibrium of the Earth’s core and *** CMGI process also brings many light elements into the Earth’s *** particular,if the Moon-forming giant impact is a CMGI,then CMGI can also explain the abnormal content of HSEs in the Earth’s current mantle.

关键词： Giant impact Core-merging process Disequilibrium of the Earth’s core and mantle

Early warning and disaster management:the importance of geographic information(Part B)

在线全文

学校读者我要写书评

暂无评论

International Journal of Digital Earth 2010年第3期3卷 313-315页

作者： Guest Editors Milan Konecny Wolfgang reinhardt Laboratory on Geoinformatics and Cartography Institute of Geography Faculty of Science Masaryk UniversityKotlarska 261137 BRNOCzech Republic AGIS Geoinformatics Lab Institute of Applied Computer Science(INF4)University of the BundeswehrMu¨nchenGermany

This special issue is part of a double special issue(Part A was published in the previous issue of this journal)dealing with the role of Geographic Information(GI)for Early Warning(EW)and Disaster Management(DM).In the editorial of Part A we gave an introduction to the topic focussing on initiatives from the EU and China and we have highlighted the importance of Digital Earth for EWand *** have also reflected on the outcome of some events organized by the guest editors which were important for the topic and for this special issue.

关键词： journal disaster Early

Influence of vascular endothelial growth factor and radiation on gap junctional intercellular communication in glioblastoma multiforme cell lines

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2017年第11期12卷 1816-1822页

作者： reinhardt Krcek Pauline Latzer Irenaus Anton Adamietz Helmut Biihler Carsten Theiss Institute of Anatomy Department of CytologyRuhr-University BochumBochumNorth Rhine-WestphaliaGermany Department of Radiotherapy and Radio-Oncology University Medical Centre MarienhospitalRuhr-University BochumHerneNorth Rhine-WestphaliaGermany Institute for Molecular Oncology Radio-Biology and Experimental RadiotherapyUniversity Medical Centre MarienhospitalRuhr-University BochumHerneNorth Rhine-WestphaliaGermany

Glioblastoma multiforme （GBM） is a highly aggressive glial brain tumor with an unfavorable prognosis despite all current therapies including surgery, radiation and chemotherapy. One characteristic of this tumor is a strong synthesis of vascular endothelial growth factor （VEGF）, an angiogenesis factor, followed by pronounced vascularization. VEGF became a target in the treatment of GBM, for example with bevacizumab or the tyrosine kinase inhibitor axitinib, which blocks VEGF receptors. To improve patients＇ prognosis, new targets in the treatment of GBM are under investigations. The role of gap junctions in GBM remains un- known, but some experimental therapies affect these intercellular channels to treat the tumor. Gap junctions are composed of connexins to allow the transport of small molecules between adjacent cells through gap junc- tional intercellular communication （GJIC）. Based on data derived from astrocytes in former studies, which show that VEGF is able to enhance GJIC, the current study analyzed the effects of VEGF, radiation therapy and VEGF receptor blockade by axitinib on GJIC in human GBM cell lines U-87 and U-251. While VEGF is able to induce GJIC in U-251 cells but not in U-87 cells, radiation enhances GJIC in both cell lines. VEGF reocptor blockade by axitinib diminishes radiation induced effects in U-251 partially, while increases GJIC in U-87 cells. Our data indicate that VEGF and radiation are both modifying components of GJ1C in pathologic brain tumor tissue.

关键词： cell communication vascular endothelial growth factor irradiation vascular endothelial growth factor-receptor blockade glioma neurobiotin connexin cell culture immunohistochemistry microinjection

Preface: Metamorphism and Orogenic Belts——Response from Micro-to Macro-Scale

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2019年第6期30卷 1075-1083页

作者： Xu-Ping Li Hans-Peter Schertl Jürgen reinhardt Shandong Key Laboratory of Depositional Mineralization and Sedimentary Minerals Shandong University of Science and TechnologyQingdao 266590China Ruhr-University Bochum Institute of GeologyMineralogy and GeophysicsD-44780 BochumGermany College of Earth Science and Engineering Shandong University of Science and TechnologyQingdao 266590China Department of Earth Sciences University of the Western CapeBellville 7535South Africa

The geological toolbox for the analysis of orogenic processes has seen substantial additions over the recent *** advances have been made in the ability to simulate geological conditions and processes by computer modeling,we have a much improved knowledge of geochemical processes(trace elements and isotopes in particular),and,last but not least,the range and versatility of micro-analytical methods and instrumentation available to us has been expanded *** latter aspect has had a particular impact on metamorphic petrology as the conventional tools to determine pressure-temperaturetime paths via rock and mineral analysis combined with isotope geochronology have generally gained in precision and accuracy through a much improved *** has moved from whole-grain analysis to spot analyses on zoned single grains while analyzing trace elements and isotopes at the same *** is therefore possible to recognize complex multi-stage orogenic events in single samples or single *** profiles in minerals provide us with time-scales of metamorphic and magmatic *** and trace elements as well as isotope profiles of mineral grains give us insight into changing ambient conditions during mineral *** special issue focuses on pressure-temperature conditions and geochronology of metamorphic rocks,isotope studies of magmatic rocks,partial melting and metasomatic processes,all with a view at tectonic implications and *** of the evidence has been gained from small-scale observation and *** field work and detailed microscopic examination remain indispensable,though,as demonstrated clearly by the"expansion"of the P-T space as applicable to crustal metamorphic processes towards extreme pressures and *** a consequence,much interest has thus focused on UHP and UHT rocks and the orogenic processes that generate *** is petrological evidence for subduction to,and subsequent exhumation fr

关键词： orogeny metasomatism UHP metamorphism UHT metamorphism geochemistry geochronology

Two-Photon Direct Laser Writing Beyond the Diffraction Limit Using the Nanopositioning and Nanomeasuring Machine

在线全文

学校读者我要写书评

暂无评论

Nanomanufacturing and Metrology 2021年第3期4卷 149-155页

作者： Laura Mohr-Weidenfeller Annika-Verena Hacker Carsten reinhardt Eberhard Manske Microsystems Technology Group Ilmenau University of TechnologyMax-Planck-Ring 12IlmenauGermany Institute for Process Measurement and Sensor Technology Ilmenau University of TechnologyGustav-Kirchhoff-Str.1IlmenauGermany Bremen University of Applied Science Neustadtswall 30BremenGermany

Since the first realization of two-photon direct laser writing(DLW)in Maruo et al.(Opt Lett 22:132-134,1997),the manufacturing using direct laser writing techniques spread out in many laboratories all over the *** materials with different material properties open a new field for micro-and *** achievable structuring resolution using this technique is reported to be sub-100 nm(Paz et *** *** Appl.24:042004,2012),while a smallest linewidth of 25 nm could be shown in Tan et al.(Appl Phys Lett 90:071106,2007).In our approach,the combination of DLW with the nanopositioning and nanomeasuring machine NMM-1 offers an improvement of the technique from the engineering side regarding the ultra-precise positioning(Weidenfeller et *** Adv Fabr Technol Micro/Nano Opt Photon Ⅺ 10544:105440E,2018).One big benefit besides the high positioning resolution of 0.1 nm is offered by the positioning range of 25 mm×25 mm×5 mm(Jager et *** Technisches Messen 67:319-323,2000;Manske et *** Meas Sci Technol 18:520-527,2007).Thus,a trans-scale fabrication without any stitching or combination of different positioning systems is *** immense synergy between the highly precise positioning and the DLW is demonstrated by the realization of resist lines and trenches whose center-to-center distance undergoes the modified diffraction limit for two-photon *** precise positioning accuracy enables a defined distance between illuminated ***,with a comparable huge width of the trenches of 1.655|im due to a low effective numerical aperture of 0.16,a resist line of 30 nm between two written trenches could be *** the interrelationships for achieving such narrow trenches have not yet been clarified,much smaller resist lines and trench widths are possible with this approach in the near future.

关键词： Direct laser writing Nanopositioning and nanomeasuring machine Two-photon absorption Laser power controlling

UV-LED projection photolithography for high-resolution functional photonic components

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Microsystems & Nanoengineering 2021年第4期7卷 149-159页

作者： Lei Zheng Urs Zywietz Tobias Birr Martin Duderstadt Ludger Overrmeyer Bernhard Roth Carsten reinhardt Hannover Centre for Optical Technologies Leibniz University HannoverHannoverLower Saxony 30167Germany Cluster of Excellence PhoenixD(Photonics Opticsand Engineering-Innovation Across Disciplines)HannoverLower Saxony 30167Germany Laser Zentrum Hannover e.V HannoverLower Saxony 30167Germany Institute of Transport and Automation Technology Leibniz University HannoverGarbsenLower Saxony 30823Germany Bremen University of Applied Science BremenBremen 28199Germany

The advancement of micro-and nanostructuring techniques in optics is driven by the demand for continuous miniaturization and the high geometrical accuracy of photonic devices and integrated ***,UV-LED projection photolithography is demonstrated as a simple and low-cost approach for rapid generation of two-dimensional optical micro-and nanostructures with high resolution and accuracy using standard optics *** developed system enables the projection of structure patterns onto a substrate with 1000-fold *** devices,e.g.,waveguides and microring resonators,on rigid or flexible substrates with varied geometrical complexity and overall structure dimensions from the nanometer to centimeter scale were successfully *** particular,high-resolution gratings with feature sizes down to 150 nm and periods as small as 400 nm were realized for the first time by this *** made of doped laser active materials were fabricated,and their spontaneous emission was *** demonstrated superior performance of the developed approach may find wide applications in photonics,plasmonics,and optical materials science,among others.

关键词： projection resolution optics

A Cambrian micro-lobopodian and the evolution of arthropod locomotion and reproduction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2007年第24期52卷 3385-3392页

作者： Andreas Maas Georg Mayer reinhardt M. Kristensen Dieter Waloszek Section for Biosystematic Documentation University of Ulm Helmholtzstrasse 20 D-89081 Ulm Germany Department of Anatomy and Cell Biology University of Melbourne Victoria Australia 3010 Zoological Museum University of Copenhagen 15 Universitetsparken DK-2100 Copenhagen Denmark

The evolutionary success of arthropods, the most abundant and diverse animal group, is mainly based on their segmented body and jointed appendages, features that had evolved most likely already before the Cambrian. The first arthropod-like animals, the lobopodians from the Early Cambrian, were unsclerotized and worm-like, and they had unjointed tubular legs. Here we describe the first three-dimensionally preserved Cambrian lobopodian. The material presented of Orstenotubulus evamuellerae gen. et sp. nov. is the smallest and youngest of a lobopodian known. O. evamuellerae shows strikingly detailed similarities to Recent tardigrades and/or onychophorans in its cellular-structured cuticle and the telescopic spines. It also shows similarities to other, longer known lobopodians, but which are ten times as large as the new form. These similarities include the finely annulated body and legs, which is characteristic also for Recent onychophorans, and paired humps continuing into spines situated dorsally to the leg insertions, a feature lacking in the extant forms. The morphology of O. evamuellerae not only elucidates our knowledge about lobopodians, but also aids in a clearer picture of the early evolution of arthropods. An example is the single ventral gonopore between a limb pair of O. evamuellerae, which indicates that a single gonopore, as developed in onychophorans, tardigrades, pentastomids, myriapods and insects, might represent the plesiomorphic state for Arthropoda, while the paired state in chelicerates and crustaceans was convergently achieved. Concerning life habits, the lateral orientation of the limbs and their anchoring spines of the new lobopodian imply that early arthropods were crawlers rather than walkers.

关键词：寒武纪节足动物门进化发展史生殖系统移动力

Starving out brain tumors: a reprogrammed lysine catabolism serves as a novel target for glioblastoma treatment

在线全文

学校读者我要写书评

暂无评论

Signal Transduction and Targeted Therapy 2023年第11期8卷 5136-5138页

作者： Désirée Gül Oliver H.Krämer Christoph reinhardt Molecular and Cellular Oncology Department of Otorhinolaryngology Head and Neck SurgeryUniversity Medical CenterJohannes Gutenberg-University Mainz55131MainzGermany Department of Toxicology University Medical CenterJohannes Gutenberg-University Mainz55131 MainzGermany Center for Thrombosis and Hemostasis(CTH) University Medical CenterJohannes Gutenberg-University MainzLangenbeckstrasse 155131 MainzGermany German Center for Cardiovascular Research(DZHK) Partner Site Rhine-MainUniversity Medical CenterJohannes Gutenberg-University Mainz55131 MainzGermany

In their recent study published in Nature,Yuan and colleagues enlighten the role of histone lysine crotonylation(Kcr)in brain tumor *** report a novel lysine-dependent mechanism through which glioblastoma stem cells m... 详细信息

关键词： glioblastoma interferon treatment

Pro?ling and Validation of the Circular RNA Repertoire in Adult Murine Hearts

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Genomics, Proteomics & Bioinformatics 2016年第4期14卷 216-223页

作者： Tobias Jakobi Lisa F. Czaja-Hasse Richard reinhardt Christoph Dieterich Section of Bioinformatics and Systems Cardiology Department of Internal Medicine IIIUniversity Hospital Heidelberg 69120 HeidelbergGermany German Centre for Cardiovascular Research(DZHK) Heidelberg/Mannheim.Germany Max Planck-Genome-Centre Cologne 50829 CologneGermany

For several decades, cardiovascular disease has been the leading cause of death throughout all countries. There is a strong genetic component to many disease subtypes （e.g., cardiomyopa- thy） and we are just beginning to understand the relevant genetic factors. Several studies have related RNA splicing to cardiovascular disease and circular RNAs （circRNAs） are an emerging player, circRNAs, which originate through back-splicing events from primary transcripts, are resis- tant to exonucleases and typically not polyadenylated. Initial functional studies show clear phenotypic outcomes for selected circRNAs. We provide, for the first time, a comprehensive catalogue of RNase R-resistant circRNA species for the adult murine heart. This work combines state-of-the-art circle sequencing with our novel DCC software to explore the circRNA landscape of heart tissue. Overall, we identified 575 circRNA species that pass a beta-binomial test for enrichment （false discovery rate of 1%） in the exonuclease-treated sequencing sample. Several circRNAs can be directly attributed to host genes that have been previously described as associated with cardiovascular disease. Further studies of these candidate circRNAs may reveal disease-relevant properties or functions of specific circRNAs.

关键词： Circular RNA circSeq Cardiovascular disease Cardiomyopathy Computational cardiology