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  • Articles  (9)
  • American Association for the Advancement of Science (AAAS)  (9)
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  • Articles  (9)
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  • 1
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    Hierarchical spin-orbital polarization of a giant Rashba system (2015)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2015-09-26
    Description: The Rashba effect is one of the most striking manifestations of spin-orbit coupling in solids and provides a cornerstone for the burgeoning field of semiconductor spintronics. It is typically assumed to manifest as a momentum-dependent splitting of a single initially spin-degenerate band into two branches with opposite spin polarization. Combining polarization-dependent and resonant angle-resolved photoemission measurements with density functional theory calculations, we show that the two "spin-split" branches of the model giant Rashba system BiTeI additionally develop disparate orbital textures, each of which is coupled to a distinct spin configuration. This necessitates a reinterpretation of spin splitting in Rashba-like systems and opens new possibilities for controlling spin polarization through the orbital sector.
    Electronic ISSN: 2375-2548
    Topics: Natural Sciences in General
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    In situ observations of a high-pressure phase of H2O Ice (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-08-07
    Description: A previously unknown solid phase of H2O has been identified by its peculiar growth patterns, distinct pressure-temperature melting relations, and vibrational Raman spectra. Morphologies of ice crystals and their pressure-temperature melting relations were directly observed in a hydrothermal diamond-anvil cell for H2O bulk densities between 1203 and 1257 kilograms per cubic meter at temperatures between -10 degrees and 50 degreesC. Under these conditions, four different ice forms were observed to melt: two stable phases, ice V and ice VI, and two metastable phases, ice IV and the new ice phase. The Raman spectra and crystal morphology are consistent with a disordered anisotropic structure with some similarities to ice VI.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chou -- Blank -- Goncharov -- Mao -- Hemley -- New York, N.Y. -- Science. 1998 Aug 7;281(5378):809-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉I. Chou, 955 National Center, U.S. Geological Survey, Reston, VA 20192, USA. J. G. Blank, A. F. Goncharov, H. Mao, R. J. Hemley, Geophysical Laboratory and Center for High Pressure Research, Carnegie Institution of Washington, 5251 Broad.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9694649" target="_blank"〉PubMed〈/a〉
    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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  • 3
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    Global protein stability profiling in mammalian cells (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-11-08
    Description: The abundance of cellular proteins is determined largely by the rate of transcription and translation coupled with the stability of individual proteins. Although we know a great deal about global transcript abundance, little is known about global protein stability. We present a highly parallel multiplexing strategy to monitor protein turnover on a global scale by coupling flow cytometry with microarray technology to track the stability of individual proteins within a complex mixture. We demonstrated the feasibility of this approach by measuring the stability of approximately 8000 human proteins and identifying proteasome substrates. The technology provides a general platform for proteome-scale analysis of protein turnover under various physiological and disease conditions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yen, Hsueh-Chi Sherry -- Xu, Qikai -- Chou, Danny M -- Zhao, Zhenming -- Elledge, Stephen J -- AG11085/AG/NIA NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2008 Nov 7;322(5903):918-23. doi: 10.1126/science.1160489.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Center for Genetics and Genomics, Brigham and Women's Hospital, Howard Hughes Medical Institute, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18988847" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acids/analysis ; Cell Cycle ; Cell Line ; DNA, Complementary ; Flow Cytometry ; Green Fluorescent Proteins/analysis/metabolism ; Half-Life ; Humans ; Luminescent Proteins/analysis/metabolism ; Oligonucleotide Array Sequence Analysis ; Open Reading Frames ; Proteasome Endopeptidase Complex/*metabolism ; Protein Biosynthesis ; *Protein Stability ; Proteins/genetics/*metabolism ; RNA, Messenger/genetics/metabolism ; Recombinant Fusion Proteins/metabolism ; Transcription, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    An Occurrence of Metastable Cristobalite in High-Pressure Garnet Granulite (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-04-04
    Description: High-pressure (0.8 gigapascals) granulite facies garnet from Gore Mountain, New York, hosts multiple solid inclusions containing the low-pressure silica polymorph cristobalite along with albite and minor ilmenite. Identification of cristobalite is based on Raman spectra, electron microprobe analysis, and microthermometric measurements on the alpha/beta phase transformation. The cristobalite plus albite inclusions may have originated as small, trapped samples of hydrous sodium-aluminum-siliceous melt. Diffusive loss of water from these inclusions under isothermal, isochoric conditions may have resulted in a large enough internal pressure decrease to promote the metastable crystallization of cristobalite.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Darling -- Chou -- Bodnar -- New York, N.Y. -- Science. 1997 Apr 4;276(5309):91-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉R. S. Darling, Department of Geology, State University of New York College at Cortland, Cortland, NY 13045, USA. I.-M. Chou, U.S. Geological Survey, 955 National Center, Reston, VA 20192, USA. R. J. Bodnar, Department of Geological Sciences, 4044 Derring Hall, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9082992" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    Gender differences and performance in science (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-02-19
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Muller, Carol B -- Ride, Sally M -- Fouke, Janie -- Whitney, Telle -- Denton, Denice D -- Cantor, Nancy -- Nelson, Donna J -- Plummer, Jim -- Busch-Vishniac, Ilene -- Meyers, Carolyn -- Rosser, Sue V -- Schiebinger, Londa -- Roberts, Eric -- Burgess, David -- Beeson, Craig -- Metz, Susan Staffin -- Sanders, Lucinda -- Watford, Bevlee A -- Ivey, Elizabeth S -- Frank Fox, Mary -- Wettack, Sheldon -- Klawe, Maria -- Wulf, William A -- Girgus, Joan -- Leboy, Phoebe S -- Babco, Eleanor L -- Shanahan, Betty -- Didion, Catherine -- Chubin, Daryl E -- Frize, Monique -- Ganter, Susan L -- Nalley, E Ann -- Franz, Judy -- Abruna, Hector D -- Strober, Myra H -- Zimmer Daniels, Jane -- Carter, Emily A -- Rhodes, Jean H -- Schrijver, Iris -- Zakian, Virginia A -- Simons, Barbara -- Martin, Ursula -- Boaler, Jo -- Jolluck, Katherine Rose -- Mankekar, Purnima -- Gray, Robert M -- Conkey, Margaret W -- Stansky, Peter -- Xie, Aihua -- Martin, Pino -- Katehi, Linda P B -- Miller, Jo Anne -- Tess Thornton, Amelia -- Lapaugh, Andrea -- Rhode, Deborah L -- Gelpi, Barbara C -- Harrold, Mary Jean -- Spencer, Cherrill M -- Schlatter Ellis, Carla -- Lord, Susan -- Quinn, Helen -- Murnane, Margaret -- Jones, Patricia P -- Hellman, Frances -- Wight, Gail -- O'hara, Ruth -- Pickering, Mary -- Sheppard, Sheri -- Leith, David -- Paytan, Adina -- Sommer, Matthew H -- Shafer, Audrey -- Grusky, David -- Yennello, Sherry -- Madan, Ashima -- Johnson, Denise L -- Yanagisako, Sylvia -- Chou-Green, Jennifer M -- Robinson, Sandra -- New York, N.Y. -- Science. 2005 Feb 18;307(5712):1043.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15718449" target="_blank"〉PubMed〈/a〉
    Keywords: *Career Choice ; Female ; Humans ; Male ; *Science ; *Sex Characteristics ; Social Change
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 6
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    A receptor in pituitary and hypothalamus that functions in growth hormone release (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-08-16
    Description: Small synthetic molecules termed growth hormone secretagogues (GHSs) act on the pituitary gland and the hypothalamus to stimulate and amplify pulsatile growth hormone (GH) release. A heterotrimeric GTP-binding protein (G protein)-coupled receptor (GPC-R) of the pituitary and arcuate ventro-medial and infundibular hypothalamus of swine and humans was cloned and was shown to be the target of the GHSs. On the basis of its pharmacological and molecular characterization, this GPC-R defines a neuroendocrine pathway for the control of pulsatile GH release and supports the notion that the GHSs mimic an undiscovered hormone.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Howard, A D -- Feighner, S D -- Cully, D F -- Arena, J P -- Liberator, P A -- Rosenblum, C I -- Hamelin, M -- Hreniuk, D L -- Palyha, O C -- Anderson, J -- Paress, P S -- Diaz, C -- Chou, M -- Liu, K K -- McKee, K K -- Pong, S S -- Chaung, L Y -- Elbrecht, A -- Dashkevicz, M -- Heavens, R -- Rigby, M -- Sirinathsinghji, D J -- Dean, D C -- Melillo, D G -- Patchett, A A -- Nargund, R -- Griffin, P R -- DeMartino, J A -- Gupta, S K -- Schaeffer, J M -- Smith, R G -- Van der Ploeg, L H -- New York, N.Y. -- Science. 1996 Aug 16;273(5277):974-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Merck Research Laboratories, Rahway, NJ 07065, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8688086" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Cell Line ; Codon ; DNA, Complementary/genetics ; GTP-Binding Proteins/metabolism ; Growth Hormone/*secretion ; Hormones/*metabolism ; Humans ; Hypothalamus, Middle/chemistry ; Indoles/*metabolism/pharmacology ; Macaca mulatta ; Molecular Sequence Data ; Oligopeptides/*metabolism ; Pituitary Gland/chemistry ; RNA, Complementary/genetics ; Rats ; Receptors, Cell Surface/analysis/chemistry/genetics/*metabolism ; *Receptors, G-Protein-Coupled ; Receptors, Ghrelin ; Spiro Compounds/*metabolism/pharmacology ; Swine
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
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    Specific and nonhepatotoxic degradation of nuclear hepatitis B virus cccDNA (2014)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2014-02-22
    Description: Current antiviral agents can control but not eliminate hepatitis B virus (HBV), because HBV establishes a stable nuclear covalently closed circular DNA (cccDNA). Interferon-alpha treatment can clear HBV but is limited by systemic side effects. We describe how interferon-alpha can induce specific degradation of the nuclear viral DNA without hepatotoxicity and propose lymphotoxin-beta receptor activation as a therapeutic alternative. Interferon-alpha and lymphotoxin-beta receptor activation up-regulated APOBEC3A and APOBEC3B cytidine deaminases, respectively, in HBV-infected cells, primary hepatocytes, and human liver needle biopsies. HBV core protein mediated the interaction with nuclear cccDNA, resulting in cytidine deamination, apurinic/apyrimidinic site formation, and finally cccDNA degradation that prevented HBV reactivation. Genomic DNA was not affected. Thus, inducing nuclear deaminases-for example, by lymphotoxin-beta receptor activation-allows the development of new therapeutics that, in combination with existing antivirals, may cure hepatitis B.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lucifora, Julie -- Xia, Yuchen -- Reisinger, Florian -- Zhang, Ke -- Stadler, Daniela -- Cheng, Xiaoming -- Sprinzl, Martin F -- Koppensteiner, Herwig -- Makowska, Zuzanna -- Volz, Tassilo -- Remouchamps, Caroline -- Chou, Wen-Min -- Thasler, Wolfgang E -- Huser, Norbert -- Durantel, David -- Liang, T Jake -- Munk, Carsten -- Heim, Markus H -- Browning, Jeffrey L -- Dejardin, Emmanuel -- Dandri, Maura -- Schindler, Michael -- Heikenwalder, Mathias -- Protzer, Ulrike -- New York, N.Y. -- Science. 2014 Mar 14;343(6176):1221-8. doi: 10.1126/science.1243462. Epub 2014 Feb 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Virology, Technische Universitat Munchen-Helmholtz Zentrum Munchen, 81675 Munich, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24557838" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal ; Antiviral Agents/*pharmacology/therapeutic use ; Cell Line ; Cell Nucleus/virology ; Cytidine/metabolism ; Cytidine Deaminase/biosynthesis ; DNA, Circular/*metabolism ; DNA, Viral/*metabolism ; Hepatitis B/*drug therapy ; Hepatitis B virus/*drug effects/metabolism ; Hepatocytes/*drug effects/metabolism/virology ; Humans ; Interferon-alpha/*pharmacology/therapeutic use ; Liver/drug effects/metabolism/virology ; Lymphotoxin beta Receptor/*agonists/antagonists & inhibitors ; Mice, SCID ; Proteins ; Up-Regulation
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
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    Phonon-mediated quantum state transfer and remote qubit entanglement (2019)
    American Association for the Advancement of Science (AAAS)
    In: Science
    Details
    Publication Date: 2019
    Description: 〈p〉Phonons, and in particular surface acoustic wave phonons, have been proposed as a means to coherently couple distant solid-state quantum systems. Individual phonons in a resonant structure can be controlled and detected by superconducting qubits, enabling the coherent generation and measurement of complex stationary phonon states. We report the deterministic emission and capture of itinerant surface acoustic wave phonons, enabling the quantum entanglement of two superconducting qubits. Using a 2-millimeter-long acoustic quantum communication channel, equivalent to a 500-nanosecond delay line, we demonstrate the emission and recapture of a phonon by one superconducting qubit, quantum state transfer between two superconducting qubits with a 67% efficiency, and, by partial transfer of a phonon, generation of an entangled Bell pair with a fidelity of 84%.〈/p〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
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    Interlayer couplings, Moire patterns, and 2D electronic superlattices in MoS2/WSe2 hetero-bilayers (2017)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2017-01-08
    Description: By using direct growth, we create a rotationally aligned MoS 2 /WSe 2 hetero-bilayer as a designer van der Waals heterostructure. With rotational alignment, the lattice mismatch leads to a periodic variation of atomic registry between individual van der Waals layers, exhibiting a Moiré pattern with a well-defined periodicity. By combining scanning tunneling microscopy/spectroscopy, transmission electron microscopy, and first-principles calculations, we investigate interlayer coupling as a function of atomic registry. We quantitatively determine the influence of interlayer coupling on the electronic structure of the hetero-bilayer at different critical points. We show that the direct gap semiconductor concept is retained in the bilayer although the valence and conduction band edges are located at different layers. We further show that the local bandgap is periodically modulated in the X - Y direction with an amplitude of ~0.15 eV, leading to the formation of a two-dimensional electronic superlattice.
    Electronic ISSN: 2375-2548
    Topics: Natural Sciences in General
    Published by American Association for the Advancement of Science (AAAS)
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