维普中文期刊产品整合服务
11篇 您的检索式:作者名="Axel Hofmann"
    题名 作者 年代 出处 被引量
1促进实施患者血液管理的专家倡议显示文摘贫血、失血以及凝血障碍每年影响数十亿人,均是患者不良结局(死亡率和发病率等)的独立风险因素。患者血液管理是一种全新的医疗模式,可显著减轻或避免此类风险。本研究基于患者血液管理的多重获益和我国相关政策背景发起专家倡议,以促进医疗机构有效实施患者血液管理。专家们一致认为患者血液管理需要卫生健康主管部门的政策推动,相关教育培训和科学研究的促进,医疗机构全员的积极参与,并辅以创新的诊疗路径、合理的医保支付报销方案以及基于数据的评价手段等。张宗久 胡豫 Axel Hofmann 刘远立 纪宏文 2022中国卫生质量管理2022,29,9:4
2Combining Lithoclast and ultrasound power in one device for percutaneous nephrolithotomy: in vitro results of a novel and highly effective technology显示文摘Peter Olbert Jost Weber Axel Hegele Zoltan Varga Axel Heidenreich Rainer Hofmann 2003Urology2003,,1:4
3The onset of deep recycling of supracrustal materials at the Paleo-Mesoarchean boundary显示文摘The recycling of supracrustal materials, and in particular hydrated rocks, has a profound impact on mantle composition and thus on the formation of continental crust, because water modifies the physical properties of lithological systems and the mechanisms of partial melting and fractional fractionation. On the modern Earth, plate tectonics offers an efficient mechanism for mass transport from the Earth’s surface to its interior, but how far this mechanism dates back in the Earth’s history is still uncertain. Here, we use zircon oxygen(O) isotopes to track recycling of supracrustal materials into the magma sources of early Archean igneous suites from the Kaapvaal Craton, southern Africa. The mean δ^(18)O values of zircon from TTG(tonalite–trondhjemite–granodiorite) rocks abruptly increase at the Paleo-Mesoarchean boundary(ca.3230 million years ago;Ma), from mantle zircon values of 5‰–6‰ to approaching 7.1‰, and this increase occurs in ≤3230 Ma rocks with elevated Dy/Yb ratios. The^(18)O enrichment is a unique signature of low-temperature water–rock interaction on the Earth’s surface. Because the later phase was emplaced into the same crustal level as the older one and TTG magmas would derive from melting processes in the garnet stability field(>40 km depth), we suggest that this evident shift in TTG zircon O isotopic compositions records the onset of recycling of the mafic oceanic crust that underwent seawater hydrothermal alteration at low temperature. The onset of the enhanced recycling of supracrustal materials may also have developed elsewhere in other Archean cratons and reflects a significant change in the tectonic realm during craton formation and stabilization, which may be important processes for the operation of plate tectonics on early Earth.Xiaolei Wang Ming Tang Jeff Moyen Di Wang Alfred Kröner Chris Hawkesworth Xiaoping Xia Hangqiang Xie Carl Anhaeusser Axel Hofmann Junyong Li Linsen Li 2022National Science Review2022,9,3:3
4Relation of markers of inflammation (C-reactive protein, fibrinogen, von Willebrand factor, and leukocyte count) and statin therapy to long-term mortality in patients with angiographically proven coronary artery disease显示文摘Christoph Bickel Hans J Rupprecht Stefan Blankenberg Christine Espiniola-Klein Axel Schlitt Gerd Rippin Gerd Hafner Rainer Treude Hisham Othman Klaus-Peter Hofmann J.ürgen Meyer 2002The American Journal of Cardiology2002,,8:1
5The geochemistry of sedimentary rocks from the Fig Tree Group, Barberton greenstone belt: Implications for tectonic, hydrothermal and surface processes during mid-Archaean times显示文摘Axel Hofmann 2005Precambrian Research (-)2005,,1:1
6A review of Palaeoarchaean felsic volcanism in the eastern Kaapvaal craton:Linking plutonic and volcanic records显示文摘In the Kaapvaal craton of southern Africa, as well as other Archaean cratons worldwide, the progression from dominant tonalite-trondhjemite-granodiorite(TTG) to granite-monzogranite-syenogranite(GMS)rock types is interpreted to reflect progressive reworking and differentiation of the continental crust.Here we re-evaluate the early Archaean evolution of the Kaapvaal craton and propose a unified view of the plutonic and volcanic records based on elemental and isotopic(Nd, Hf) data and zircon U-Pb ages.We also report new whole-rock major and trace element analyses, zircon U-Pb ages and Hf-in-zircon analyses of igneous clasts from a conglomerate of the 3.2 Ga Moodies Group of the Barberton Greenstone Belt. Many of these clasts are derived from shallow intrusive rocks of granitic composition, which are scarcely represented in outcrop. Despite alteration, the volcanic rocks can be classified based on their trace element contents into two main groups by comparison with plutonic rocks. One group has characteristics resembling TTGs: relatively low and fractionated rare earth element concentrations with no Eu anomaly and relatively low concentrations of high field strength elements(Nb mostly ≤12 ppm). The second group has GMS-like characteristics: less fractionated REE, marked negative Eu anomalies and HFSE-increasing trends with progressing fractionation(Nb ≤ 50 ppm or more, Th up to 30-40 ppm). In addition, igneous clasts of Moodies Group conglomerate have chemical, mineralogical and isotopic characteristics that link them to GMS. New analyses of some of these clasts indicate elevated high field strength elements(Nb up to 20 ppm) and_(εHf)(t)of zircon down to -3.5. These rocks imply the presence of an already differentiated felsic crust at >3.5 Ga, which has Nd and Hf model ages indicating mantle extraction ages extending back to the Eoarchaean. The combined record of plutonic and volcanic rocks of the Kaapvaal craton provides a more complex scenario than previously suggested and indicates that TTG and GMS-like felsic magmas were emplaced broadly coevally in multiple pulses between ~3.5 Ga and 3.2 Ga.Andrea Agangi Axel Hofmann Marlina A.Elburg 2018Geoscience Frontiers2018,9,3:1
7Theoretical prediction of high melting temperature for a Mo–Ru–Ta–W HCP multiprincipal element alloy显示文摘While rhenium is an ideal material for rapid thermal cycling applications under high temperatures,such as rocket engine nozzles,its high cost limits its widespread use and prompts an exploration of viable cost-effective substitutes.In prior work,we identified a promising pool of candidate substitute alloys consisting of Mo,Ru,Ta,and W.In this work we demonstrate,based on density functional theory melting temperature calculations,that one of the candidates,Mo_(0.292)Ru_(0.555)Ta_(0.031)W_(0.122),exhibits a high melting temperature(around 2626 K),thus supporting its use in high-temperature applications.Qi-Jun Hong Jan Schroers Douglas Hofmann Stefano Curtarolo Mark Asta Axel van de Walle 2021npj Computational Materials2021,,1:1
8Relation of markers of inflammation (C-reactive protein, fibrinogen, von Willebrand factor, and leukocyte count) and statin therapy to long-term mortality in patients with angiographically proven coronary artery disease显示文摘Christoph Bickel Hans J Rupprecht Stefan Blankenberg Christine Espiniola-Klein Axel Schlitt Gerd Rippin Gerd Hafner Rainer Treude Hisham Othman Klaus-Peter Hofmann J.ürgen Meyer 2002The American Journal of Cardiology2002,,8:1
9Patient blood management – The new frontier显示文摘Aryeh Shander Axel Hofmann James Isbister Hugo Van Aken 2013Best Practice & Research Clinical Anaesthesiology2013,,1:1
10Accuracy of Frozen Section Examination of Testicular Tumors of Uncertain Origin显示文摘Achim Elert Peter Olbert Axel Hegele Peter Barth Rainer Hofmann Axel Heidenreich 2002European Urology2002,,3:1
11Cyclicity of Triassic to Lower Jurassic continental red beds of the Argana Valley, Morocco:implications for palaeoclimate and basin evolution显示文摘Axel Hofmann Abdelilah Tourani Reinhard Gaupp 2000Palaeogeography Palaeoclimatology Palaeoecology2000,161,:1
返回顶部 每页显示:
共1页 首页 上一页 第1页 下一页 末页 /1 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费