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  • 1
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    Resonance enhancement of first- and second-order coherent phonons in metallic single-walled carbon nanotubes (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-12-30
    Description: Author(s): K. Sato, K. Tahara, Y. Minami, I. Katayama, M. Kitajima, H. Kawai, K. Yanagi, and J. Takeda High-frequency coherent phonons resonantly excited in metallic single-walled carbon nanotubes (M-SWCNTs) were investigated via spectrally resolved pump-probe spectroscopy using 7.5-fs laser pulses. In addition to first-order coherent phonons such as radial breathing mode (RBM) and M and G modes, we ... [Phys. Rev. B 90, 235435] Published Mon Dec 29, 2014
    Keywords: Surface physics, nanoscale physics, low-dimensional systems
    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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    Resistively detected NMR line shapes in a quasi-one-dimensional electron system (2017)
    American Physical Society (APS)
    Details
    Publication Date: 2017-06-10
    Description: Author(s): M. H. Fauzi, A. Singha, M. F. Sahdan, M. Takahashi, K. Sato, K. Nagase, B. Muralidharan, and Y. Hirayama We observe variation in the resistively detected nuclear magnetic resonance (RDNMR) line shapes in quantum Hall breakdown. The breakdown occurs locally in a gate-defined quantum point contact (QPC) region. Of particular interest is the observation of a dispersive line shape occurring when the bulk t… [Phys. Rev. B 95, 241404(R)] Published Fri Jun 09, 2017
    Keywords: Surface physics, nanoscale physics, low-dimensional systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
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  • 3
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    Dynamic nuclear polarization at high Landau levels in a quantum point contact (2018)
    American Physical Society (APS)
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    Publication Date: 2018-05-30
    Description: Author(s): M. H. Fauzi, A. Noorhidayati, M. F. Sahdan, K. Sato, K. Nagase, and Y. Hirayama We demonstrate a way to polarize and detect nuclear spin in a gate-defined quantum point contact operating at high Landau levels. Resistively detected nuclear magnetic resonance (RDNMR) can be achieved up to the fifth Landau level and at a magnetic field lower than 1 T. We are able to retain the RDN... [Phys. Rev. B 97, 201412(R)] Published Tue May 29, 2018
    Keywords: Surface physics, nanoscale physics, low-dimensional systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
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  • 4
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    Using gate-modulated Raman scattering and electron-phonon interactions to probe single-layer graphene: A different approach to assign phonon combination modes (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-12-01
    Description: Author(s): D. L. Mafra, J. Kong, K. Sato, R. Saito, M. S. Dresselhaus, and P. T. Araujo Gate-modulated and laser-dependent Raman spectroscopy have been widely used to study q =0 zone center phonon modes, their self-energy, and their coupling to electrons in graphene systems. In this work we use gate-modulated Raman of q ≠0 phonons as a technique to understand the nature of five second-or... [Phys. Rev. B 86, 195434] Published Fri Nov 30, 2012
    Keywords: Surface physics, nanoscale physics, low-dimensional systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
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  • 5
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    Temperature dependence of enhanced spin relaxation time in metallic nanoparticles: Experiment and theory (2016)
    American Physical Society (APS)
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    Publication Date: 2016-02-02
    Description: Author(s): T. Koda, S. Mitani, S. Takahashi, M. Mizuguchi, K. Sato, T. J. Konno, S. Maekawa, and K. Takanashi We study the enhanced spin relaxation time of Au nanoparticles in nanopillar-shaped double-barrier junction devices with a stacked Fe/MgO/Au-nanoparticle/MgO/Fe structure. The size of Au nanoparticles located in a current path is deduced from a transmission electron micrograph and the Coulomb blocka… [Phys. Rev. B 93, 085402] Published Mon Feb 01, 2016
    Keywords: Surface physics, nanoscale physics, low-dimensional systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
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  • 6
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    Location, location, location: membrane targeting directed by PX domains (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-12-01
    Description: Phosphoinositide (PI)-binding domains play critical roles in the intracellular localization of a variety of cell-signaling proteins. The 120-amino acid Phox homology (PX) domain targets proteins to organelle membranes through interactions between two conserved basic motifs within the PX domain and specific PIs. The combination of protein-lipid and protein-protein interactions ensures the proper localization and regulation of PX domain-containing proteins. Upon proper localization, PX domain-containing proteins can then bind to additional proteins and execute their functions in a diverse set of biological pathways, including intracellular protein transport, cell growth and survival, cytoskeletal organization, and neutrophil defense.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sato, T K -- Overduin, M -- Emr, S D -- New York, N.Y. -- Science. 2001 Nov 30;294(5548):1881-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cellular and Molecular Medicine and Howard Hughes Medical Institute, University of California at San Diego School of Medicine, La Jolla, CA 92093-0668, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11729306" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Animals ; Carrier Proteins/chemistry/metabolism ; Humans ; Intracellular Membranes/*metabolism ; Models, Molecular ; NADPH Oxidase ; Phosphatidylinositol 3-Kinases/metabolism ; Phosphatidylinositols/*metabolism ; Phosphoproteins/*chemistry/*metabolism ; Protein Binding ; Protein Conformation ; Protein Structure, Tertiary ; Protein Transport ; Signal Transduction ; Structure-Activity Relationship ; src Homology Domains
    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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  • 7
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    Insect olfactory receptors are heteromeric ligand-gated ion channels (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-04-15
    Description: In insects, each olfactory sensory neuron expresses between one and three ligand-binding members of the olfactory receptor (OR) gene family, along with the highly conserved and broadly expressed Or83b co-receptor. The functional insect OR consists of a heteromeric complex of unknown stoichiometry but comprising at least one variable odorant-binding subunit and one constant Or83b family subunit. Insect ORs lack homology to G-protein-coupled chemosensory receptors in vertebrates and possess a distinct seven-transmembrane topology with the amino terminus located intracellularly. Here we provide evidence that heteromeric insect ORs comprise a new class of ligand-activated non-selective cation channels. Heterologous cells expressing silkmoth, fruitfly or mosquito heteromeric OR complexes showed extracellular Ca2+ influx and cation-non-selective ion conductance on stimulation with odorant. Odour-evoked OR currents are independent of known G-protein-coupled second messenger pathways. The fast response kinetics and OR-subunit-dependent K+ ion selectivity of the insect OR complex support the hypothesis that the complex between OR and Or83b itself confers channel activity. Direct evidence for odorant-gated channels was obtained by outside-out patch-clamp recording of Xenopus oocyte and HEK293T cell membranes expressing insect OR complexes. The ligand-gated ion channel formed by an insect OR complex seems to be the basis for a unique strategy that insects have acquired to respond to the olfactory environment.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sato, Koji -- Pellegrino, Maurizio -- Nakagawa, Takao -- Nakagawa, Tatsuro -- Vosshall, Leslie B -- Touhara, Kazushige -- England -- Nature. 2008 Apr 24;452(7190):1002-6. doi: 10.1038/nature06850. Epub 2008 Apr 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Integrated Biosciences, The University of Tokyo, Chiba 277-8562, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18408712" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bombyx ; Calcium/metabolism ; Cell Line ; Culicidae ; Drosophila melanogaster ; Electric Conductivity ; HeLa Cells ; Heterotrimeric GTP-Binding Proteins ; Humans ; Insects/*chemistry ; *Ion Channel Gating ; Kinetics ; Ligands ; Odors/analysis ; Oocytes/metabolism ; Patch-Clamp Techniques ; Protein Subunits/chemistry/metabolism ; Receptors, Odorant/*chemistry/*metabolism ; Smell ; Xenopus laevis
    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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  • 8
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    Two chemoreceptors mediate developmental effects of dauer pheromone in C. elegans (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-10-03
    Description: Intraspecific chemical communication is mediated by signals called pheromones. Caenorhabditis elegans secretes a mixture of small molecules (collectively termed dauer pheromone) that regulates entry into the alternate dauer larval stage and also modulates adult behavior via as yet unknown receptors. Here, we identify two heterotrimeric GTP-binding protein (G protein)-coupled receptors (GPCRs) that mediate dauer formation in response to a subset of dauer pheromone components. The SRBC-64 and SRBC-66 GPCRs are members of the large Caenorhabditis-specific SRBC subfamily and are expressed in the ASK chemosensory neurons, which are required for pheromone-induced dauer formation. Expression of both, but not each receptor alone, confers pheromone-mediated effects on heterologous cells. Identification of dauer pheromone receptors will allow a better understanding of the signaling cascades that transduce the context-dependent effects of ecologically important chemical signals.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4448937/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4448937/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kim, Kyuhyung -- Sato, Koji -- Shibuya, Mayumi -- Zeiger, Danna M -- Butcher, Rebecca A -- Ragains, Justin R -- Clardy, Jon -- Touhara, Kazushige -- Sengupta, Piali -- F32 GM077943/GM/NIGMS NIH HHS/ -- P30 NS045713/NS/NINDS NIH HHS/ -- P30 NS45713/NS/NINDS NIH HHS/ -- R01 CA024487/CA/NCI NIH HHS/ -- R01 CA24487/CA/NCI NIH HHS/ -- R01 GM056223/GM/NIGMS NIH HHS/ -- R01 GM56223/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2009 Nov 13;326(5955):994-8. doi: 10.1126/science.1176331. Epub 2009 Oct 1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology and National Center for Behavioral Genomics, Brandeis University, Waltham, MA 02454, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19797623" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Caenorhabditis elegans/genetics/*growth & development/*physiology ; Caenorhabditis elegans Proteins/genetics/physiology ; Calcium/metabolism ; Cell Line ; Chemoreceptor Cells/metabolism ; Cyclic AMP/metabolism ; Cyclic GMP/metabolism ; GTP-Binding Protein alpha Subunits, Gi-Go/physiology ; Gene Expression Regulation, Developmental ; Genes, Helminth ; Guanylate Cyclase/antagonists & inhibitors/metabolism ; Hexoses/chemistry/physiology ; Humans ; Mutation ; Pheromones/*physiology ; Receptors, G-Protein-Coupled ; Reproduction ; Signal Transduction ; Transfection
    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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    Coherent nanoscale optical-phonon wave packet in graphene layers (2013)
    American Physical Society (APS)
    Details
    Publication Date: 2013-12-05
    Description: Author(s): I. Katayama, K. Sato, S. Koga, J. Takeda, S. Hishita, H. Fukidome, M. Suemitsu, and M. Kitajima Coherent large-wave-vector phonons in graphene layers were excited by using a 7.5-fs ultrashort laser, and observed by wavelength-resolved pump-probe transient reflectivity spectroscopy. Inter-Dirac-cone electron scattering mediated by edges and defects in graphene layers drives large-wave-vector co... [Phys. Rev. B 88, 245406] Published Wed Dec 04, 2013
    Keywords: Surface physics, nanoscale physics, low-dimensional systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 10
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    Ballistic- and quantum-conductor carbon nanotubes: A reference experiment put to the test (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-11-21
    Description: Author(s): M. Kobylko, M. Kociak, Y. Sato, K. Urita, A. M. Bonnot, A. Kasumov, Y. Kasumov, K. Suenaga, and C. Colliex Using the liquid metal contact method for in-situ electron transport measurements in TEM, this paper revisits the question of whether carbon nanotubes (CNTs) are diffusive or ballistic conductors. It challenges previous conclusions of many ex-situ measurements that CNTs support ballistic transport and quantum conductance. It also suggests three reasons that possibly led to false positive results in the previous measurements. [Phys. Rev. B 90, 195431] Published Thu Nov 20, 2014
    Keywords: Surface physics, nanoscale physics, low-dimensional systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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