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  • 1
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    Controlled tunneling-induced dephasing of Rabi rotations for high-fidelity hole spin initialization (2015)
    American Physical Society (APS)
    Details
    Publication Date: 2015-09-22
    Description: Author(s): P.-L. Ardelt, T. Simmet, K. Müller, C. Dory, K. A. Fischer, A. Bechtold, A. Kleinkauf, H. Riedl, and J. J. Finley We report the subpicosecond initialization of a single heavy hole spin in a self-assembled quantum dot with 〉 98.5 % fidelity and without external magnetic field. Using an optically addressable charge and spin storage device we tailor the relative electron and hole tunneling escape time scales from… [Phys. Rev. B 92, 115306] Published Fri Sep 18, 2015
    Keywords: Semiconductors II: surfaces, interfaces, microstructures, and related topics
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 2
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    Electrical spin injection and transport in germanium (2011)
    American Physical Society (APS)
    Details
    Publication Date: 2011-10-01
    Description: Author(s): Yi Zhou, Wei Han, Li-Te Chang, Faxian Xiu, Minsheng Wang, Michael Oehme, Inga A. Fischer, Joerg Schulze, Roland. K. Kawakami, and Kang L. Wang [Phys. Rev. B 84, 125323] Published Fri Sep 30, 2011
    Keywords: Semiconductors II: surfaces, interfaces, microstructures, and related topics
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 3
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    Photoluminescence from ultrathin Ge-rich multiple quantum wells observed up to room temperature: Experiments and modeling (2016)
    American Physical Society (APS)
    Details
    Publication Date: 2016-12-09
    Description: Author(s): T. Wendav, I. A. Fischer, M. Virgilio, G. Capellini, F. Oliveira, M. F. Cerqueira, A. Benedetti, S. Chiussi, P. Zaumseil, B. Schwartz, K. Busch, and J. Schulze Employing a low-temperature growth mode, we fabricated ultrathin S i 1 − x G e x /Si multiple quantum well structures with a well thickness of less than 1.5 nm and a Ge concentration above 60% directly on a Si substrate. We identified an unusual temperature-dependent blueshift of the photoluminescence (PL) … [Phys. Rev. B 94, 245304] Published Thu Dec 08, 2016
    Keywords: Semiconductors II: surfaces, interfaces, microstructures, and related topics
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 4
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    MicroRNA-34a regulates cardiac ageing and function (2013)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2013-02-22
    Description: Ageing is the predominant risk factor for cardiovascular diseases and contributes to a significantly worse outcome in patients with acute myocardial infarction. MicroRNAs (miRNAs) have emerged as crucial regulators of cardiovascular function and some miRNAs have key roles in ageing. We propose that altered expression of miRNAs in the heart during ageing contributes to the age-dependent decline in cardiac function. Here we show that miR-34a is induced in the ageing heart and that in vivo silencing or genetic deletion of miR-34a reduces age-associated cardiomyocyte cell death. Moreover, miR-34a inhibition reduces cell death and fibrosis following acute myocardial infarction and improves recovery of myocardial function. Mechanistically, we identified PNUTS (also known as PPP1R10) as a novel direct miR-34a target, which reduces telomere shortening, DNA damage responses and cardiomyocyte apoptosis, and improves functional recovery after acute myocardial infarction. Together, these results identify age-induced expression of miR-34a and inhibition of its target PNUTS as a key mechanism that regulates cardiac contractile function during ageing and after acute myocardial infarction, by inducing DNA damage responses and telomere attrition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Boon, Reinier A -- Iekushi, Kazuma -- Lechner, Stefanie -- Seeger, Timon -- Fischer, Ariane -- Heydt, Susanne -- Kaluza, David -- Treguer, Karine -- Carmona, Guillaume -- Bonauer, Angelika -- Horrevoets, Anton J G -- Didier, Nathalie -- Girmatsion, Zenawit -- Biliczki, Peter -- Ehrlich, Joachim R -- Katus, Hugo A -- Muller, Oliver J -- Potente, Michael -- Zeiher, Andreas M -- Hermeking, Heiko -- Dimmeler, Stefanie -- England -- Nature. 2013 Mar 7;495(7439):107-10. doi: 10.1038/nature11919. Epub 2013 Feb 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Cardiovascular Regeneration, Centre of Molecular Medicine, Goethe University Frankfurt, 60590 Frankfurt, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23426265" target="_blank"〉PubMed〈/a〉
    Keywords: Aging/genetics/pathology/*physiology ; Animals ; Apoptosis ; DNA Damage ; Fibrosis/genetics/pathology ; Gene Deletion ; *Gene Expression Regulation ; Gene Knockout Techniques ; Genetic Therapy ; Heart/*physiology ; Mice ; Mice, Inbred C57BL ; MicroRNAs/*genetics/metabolism ; Myocardial Infarction/genetics/pathology/therapy ; Myocardium/cytology/*metabolism/pathology ; Myocytes, Cardiac/cytology/metabolism/pathology ; Substrate Specificity ; Telomere/genetics/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 5
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    Graphitic tribological layers in metal-on-metal hip replacements (2011)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2011-12-24
    Description: Arthritis is a leading cause of disability, and when nonoperative methods have failed, a prosthetic implant is a cost-effective and clinically successful treatment. Metal-on-metal replacements are an attractive implant technology, a lower-wear alternative to metal-on-polyethylene devices. Relatively little is known about how sliding occurs in these implants, except that proteins play a critical role and that there is a tribological layer on the metal surface. We report evidence for graphitic material in the tribological layer in metal-on-metal hip replacements retrieved from patients. As graphite is a solid lubricant, its presence helps to explain why these components exhibit low wear and suggests methods of improving their performance; simultaneously, this raises the issue of the physiological effects of graphitic wear debris.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Liao, Y -- Pourzal, R -- Wimmer, M A -- Jacobs, J J -- Fischer, A -- Marks, L D -- 1RC2AR058993-01/AR/NIAMS NIH HHS/ -- New York, N.Y. -- Science. 2011 Dec 23;334(6063):1687-90. doi: 10.1126/science.1213902.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60201, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22194573" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arthroplasty, Replacement, Hip ; Biocompatible Materials ; Cattle ; Corrosion ; Friction ; Graphite/*analysis ; *Hip Prosthesis/adverse effects ; Humans ; Metal Nanoparticles ; Prosthesis Design ; Prosthesis Failure ; Serum ; Spectroscopy, Electron Energy-Loss ; Spectrum Analysis, Raman ; Surface Properties ; *Vitallium
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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