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  • 1
    Publication Date: 2011-01-28
    Description: Author(s): M. Asai, K. Tsukada, H. Haba, Y. Ishii, T. Ichikawa, A. Toyoshima, T. Ishii, Y. Nagame, I. Nishinaka, Y. Kojima, and K. Sueki Excited states in ^{251} Fm populated via the α decay of ^{255} No are studied in detail through α-γ coincidence and α fine-structure measurements. Five excited states reported previously in ^{251} Fm are firmly established through the α-γ coincidence measurement, and rotational bands built on... [Phys. Rev. C 83, 014315] Published Thu Jan 27, 2011
    Keywords: Nuclear Structure
    Print ISSN: 0556-2813
    Electronic ISSN: 1089-490X
    Topics: Physics
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  • 2
    Publication Date: 2015-04-03
    Description: Motivation: Ustiloxins A and B are toxic cyclic tetrapeptides, Tyr-Val/Ala-Ile-Gly (Y-V/A-I-G), that were originally identified from Ustilaginoidea virens , a pathogenic fungus affecting rice plants. Contrary to our report that ustiloxin B is ribosomally synthesized in Aspergillus flavus , a recent report suggested that ustiloxins are synthesized by a non-ribosomal peptide synthetase in U.virens. Thus, we analyzed the U.virens genome, to identify the responsible gene cluster. Results: The biosynthetic gene cluster was identified from the genome of U.virens based on homologies to the ribosomal peptide biosynthetic gene cluster for ustiloxin B identified from A.flavus . It contains a gene encoding precursor protein having five Tyr-Val-Ile-Gly and three Tyr-Ala-Ile-Gly motifs for ustiloxins A and B, respectively, strongly indicating that ustiloxins A and B from U.virens are ribosomally synthesized. Availability and implementation: Accession codes of the U.virens and A.flavus gene clusters in NCBI are BR001221 and BR001206, respectively. Contact: umemura-m@aist.go.jp or asai@k.u-tokyo.ac.jp Supplementary information: Supplementary data are available at Bioinformatics online.
    Print ISSN: 1367-4803
    Electronic ISSN: 1460-2059
    Topics: Biology , Computer Science , Medicine
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  • 3
    Publication Date: 2014-08-30
    Description: Sound radiation from a two-dimensional protuberance glued on the wall in a laminar boundary layer was investigated experimentally at low Mach numbers. When the protuberance was as high as the boundary-layer thickness, a feedback-loop mechanism set in between protuberance-generated sound and Tollmien-Schlichting (T-S) waves generated by the leading-edge receptivity to the upstream-propagating sound. Although occurrence of a separation bubble immediately upstream of the protuberance played important roles in the evolution of instability waves into vortices interacting with the protuberance, the frequency of tonal vortex sound was determined by the selective amplification of T-S waves in the linear instability stage upstream of the separation bubble and was not affected by the instability of the separation bubble.
    Print ISSN: 1070-6631
    Electronic ISSN: 1089-7666
    Topics: Physics
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  • 4
    Publication Date: 2013-07-23
    Description: Melanocortin receptor accessory proteins (MRAPs) modulate signaling of melanocortin receptors in vitro. To investigate the physiological role of brain-expressed melanocortin 2 receptor accessory protein 2 (MRAP2), we characterized mice with whole-body and brain-specific targeted deletion of Mrap2, both of which develop severe obesity at a young age. Mrap2 interacts directly with melanocortin 4 receptor (Mc4r), a protein previously implicated in mammalian obesity, and it enhances Mc4r-mediated generation of the second messenger cyclic adenosine monophosphate, suggesting that alterations in Mc4r signaling may be one mechanism underlying the association between Mrap2 disruption and obesity. In a study of humans with severe, early-onset obesity, we found four rare, potentially pathogenic genetic variants in MRAP2, suggesting that the gene may also contribute to body weight regulation in humans.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3788688/" 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/PMC3788688/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Asai, Masato -- Ramachandrappa, Shwetha -- Joachim, Maria -- Shen, Yuan -- Zhang, Rong -- Nuthalapati, Nikhil -- Ramanathan, Visali -- Strochlic, David E -- Ferket, Peter -- Linhart, Kirsten -- Ho, Caroline -- Novoselova, Tatiana V -- Garg, Sumedha -- Ridderstrale, Martin -- Marcus, Claude -- Hirschhorn, Joel N -- Keogh, Julia M -- O'Rahilly, Stephen -- Chan, Li F -- Clark, Adrian J -- Farooqi, I Sadaf -- Majzoub, Joseph A -- 098497/Wellcome Trust/United Kingdom -- G0802796/Medical Research Council/United Kingdom -- G0900554/Medical Research Council/United Kingdom -- G9824984/Medical Research Council/United Kingdom -- P30-HD18655/HD/NICHD NIH HHS/ -- R01 DK075787/DK/NIDDK NIH HHS/ -- R01DK075787/DK/NIDDK NIH HHS/ -- T32 DK007699/DK/NIDDK NIH HHS/ -- T32 MH020017/MH/NIMH NIH HHS/ -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2013 Jul 19;341(6143):275-8. doi: 10.1126/science.1233000.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Endocrinology, Department of Medicine, Boston Children's Hospital, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23869016" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Animals ; Body Mass Index ; Body Weight/*genetics ; Carrier Proteins/*genetics ; Child ; Child, Preschool ; Energy Metabolism/genetics ; Female ; Gene Deletion ; Humans ; Male ; Mice ; Mice, Knockout ; Obesity/*genetics/metabolism ; Receptor Activity-Modifying Proteins/genetics/*metabolism ; Receptor, Melanocortin, Type 4/genetics/*metabolism ; Young Adult
    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
    Publication Date: 2014-09-23
    Description: Experimental investigations of transactinoide elements provide benchmark results for chemical theory and probe the predictive power of trends in the periodic table. So far, in gas-phase chemical reactions, simple inorganic compounds with the transactinoide in its highest oxidation state have been synthesized. Single-atom production rates, short half-lives, and harsh experimental conditions limited the number of experimentally accessible compounds. We applied a gas-phase carbonylation technique previously tested on short-lived molybdenum (Mo) and tungsten (W) isotopes to the preparation of a carbonyl complex of seaborgium, the 106th element. The volatile seaborgium complex showed the same volatility and reactivity with a silicon dioxide surface as those of the hexacarbonyl complexes of the lighter homologs Mo and W. Comparison of the product's adsorption enthalpy with theoretical predictions and data for the lighter congeners supported a Sg(CO)6 formulation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Even, J -- Yakushev, A -- Dullmann, Ch E -- Haba, H -- Asai, M -- Sato, T K -- Brand, H -- Di Nitto, A -- Eichler, R -- Fan, F L -- Hartmann, W -- Huang, M -- Jager, E -- Kaji, D -- Kanaya, J -- Kaneya, Y -- Khuyagbaatar, J -- Kindler, B -- Kratz, J V -- Krier, J -- Kudou, Y -- Kurz, N -- Lommel, B -- Miyashita, S -- Morimoto, K -- Morita, K -- Murakami, M -- Nagame, Y -- Nitsche, H -- Ooe, K -- Qin, Z -- Schadel, M -- Steiner, J -- Sumita, T -- Takeyama, M -- Tanaka, K -- Toyoshima, A -- Tsukada, K -- Turler, A -- Usoltsev, I -- Wakabayashi, Y -- Wang, Y -- Wiehl, N -- Yamaki, S -- New York, N.Y. -- Science. 2014 Sep 19;345(6203):1491-3. doi: 10.1126/science.1255720.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Helmholtz-Institut Mainz, 55099 Mainz, Germany. ; GSI Helmholtzzentrum fur Schwerionenforschung GmbH, 64291 Darmstadt, Germany. ; Helmholtz-Institut Mainz, 55099 Mainz, Germany. GSI Helmholtzzentrum fur Schwerionenforschung GmbH, 64291 Darmstadt, Germany. Institut fur Kernchemie, Johannes Gutenberg-Universitat Mainz, 55099 Mainz, Germany. duellman@uni-mainz.de. ; RIKEN, Wako, Saitama 351-0198, Japan. ; Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan. ; Institut fur Kernchemie, Johannes Gutenberg-Universitat Mainz, 55099 Mainz, Germany. ; Department of Chemistry and Biochemistry, University of Bern, 3012 Bern, Switzerland. Paul Scherrer Institute, 5232 Villigen, Switzerland. ; Institute of Modern Physics, Chinese Academy of Sciences, 730000 Lanzhou, China. ; Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan. Department of Chemistry, Hiroshima University, Kagamiyama, Higashi-Hiroshima 739-8526, Japan. ; RIKEN, Wako, Saitama 351-0198, Japan. Department of Physics, Kyushu University, Higashi-Ku, Fukuoka, 812-8581, Japan. ; RIKEN, Wako, Saitama 351-0198, Japan. Department of Chemistry, Niigata University, Niigata, Niigata 950-2181, Japan. ; Department of Chemistry, University of California, Berkeley, CA 94720-1460, USA. Lawrence Berkeley National Laboratory, Berkeley, CA 94720-8169, USA. ; Department of Chemistry, Niigata University, Niigata, Niigata 950-2181, Japan. ; Helmholtz-Institut Mainz, 55099 Mainz, Germany. Institut fur Kernchemie, Johannes Gutenberg-Universitat Mainz, 55099 Mainz, Germany. ; RIKEN, Wako, Saitama 351-0198, Japan. Department of Physics, Saitama University, Saitama 338-8570, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25237098" 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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  • 6
    Publication Date: 2015-04-10
    Description: The chemical properties of an element are primarily governed by the configuration of electrons in the valence shell. Relativistic effects influence the electronic structure of heavy elements in the sixth row of the periodic table, and these effects increase dramatically in the seventh row--including the actinides--even affecting ground-state configurations. Atomic s and p1/2 orbitals are stabilized by relativistic effects, whereas p3/2, d and f orbitals are destabilized, so that ground-state configurations of heavy elements may differ from those of lighter elements in the same group. The first ionization potential (IP1) is a measure of the energy required to remove one valence electron from a neutral atom, and is an atomic property that reflects the outermost electronic configuration. Precise and accurate experimental determination of IP1 gives information on the binding energy of valence electrons, and also, therefore, on the degree of relativistic stabilization. However, such measurements are hampered by the difficulty in obtaining the heaviest elements on scales of more than one atom at a time. Here we report that the experimentally obtained IP1 of the heaviest actinide, lawrencium (Lr, atomic number 103), is 4.96(+0.08)(-0.07) electronvolts. The IP1 of Lr was measured with (256)Lr (half-life 27 seconds) using an efficient surface ion-source and a radioisotope detection system coupled to a mass separator. The measured IP1 is in excellent agreement with the value of 4.963(15) electronvolts predicted here by state-of-the-art relativistic calculations. The present work provides a reliable benchmark for theoretical calculations and also opens the way for IP1 measurements of superheavy elements (that is, transactinides) on an atom-at-a-time scale.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sato, T K -- Asai, M -- Borschevsky, A -- Stora, T -- Sato, N -- Kaneya, Y -- Tsukada, K -- Dullmann, Ch E -- Eberhardt, K -- Eliav, E -- Ichikawa, S -- Kaldor, U -- Kratz, J V -- Miyashita, S -- Nagame, Y -- Ooe, K -- Osa, A -- Renisch, D -- Runke, J -- Schadel, M -- Thorle-Pospiech, P -- Toyoshima, A -- Trautmann, N -- England -- Nature. 2015 Apr 9;520(7546):209-11. doi: 10.1038/nature14342.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan. ; 1] Centre for Theoretical Chemistry and Physics, New Zealand Institute for Advanced Study, Massey University, 0745 North Shore MSC, Auckland, New Zealand [2] Helmholtz-Institut Mainz, 55099 Mainz, Germany. ; ISOLDE, CERN, CH-1211 Geneva 23, Switzerland. ; 1] Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan [2] Graduate School of Science and Engineering, Ibaraki University, Mito, Ibaraki 310-8512, Japan. ; 1] Helmholtz-Institut Mainz, 55099 Mainz, Germany [2] GSI Helmholtzzentrum fur Schwerionenforschung, 64291 Darmstadt, Germany [3] Institut fur Kernchemie, Johannes Gutenberg-Universitat Mainz, 55099 Mainz, Germany. ; 1] Helmholtz-Institut Mainz, 55099 Mainz, Germany [2] Institut fur Kernchemie, Johannes Gutenberg-Universitat Mainz, 55099 Mainz, Germany. ; School of Chemistry, Tel Aviv University, 69978 Tel Aviv, Israel. ; 1] Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki 319-1195, Japan [2] Nishina Center for Accelerator-Based Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan. ; Institut fur Kernchemie, Johannes Gutenberg-Universitat Mainz, 55099 Mainz, Germany. ; Graduate School of Science, Hiroshima University, Kagamiyama, Higashi-Hiroshima 739-8526, Japan. ; Institute of Science and Technology, Niigata University, Niigata 910-2181, Japan. ; GSI Helmholtzzentrum fur Schwerionenforschung, 64291 Darmstadt, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25855457" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 7
    Publication Date: 2014-03-06
    Description: Congenital myasthenic syndromes (CMS) are heterogeneous disorders in which the safety margin of neuromuscular transmission is compromised by one or more specific mechanisms. Using Sanger and exome sequencing in a CMS patient, we identified two heteroallelic mutations, p.Glu1233Lys and p.Arg1277His, in LRP4 coding for the postsynaptic low-density lipoprotein receptor-related protein 4. LRP4, expressed on the surface of the postsynaptic membrane of the neuromuscular junction, is a receptor for neurally secreted agrin, and LRP4 bound by agrin activates MuSK. Activated MuSK in concert with Dok-7 stimulates rapsyn to concentrate and anchor AChR on the postsynaptic membrane and interacts with other proteins implicated in the assembly and maintenance of the neuromuscular junction. LRP4 also functions as an inhibitor of Wnt/beta-catenin signaling. The identified mutations in LRP4 are located at the edge of its 3rd beta-propeller domain and decrease binding affinity of LRP4 for both MuSK and agrin. Mutations in the LRP4 3rd beta-propeller domain were previously reported to impair Wnt signaling and cause bone diseases including Cenani–Lenz syndactyly syndrome and sclerosteosis-2. By analyzing naturally occurring and artificially introduced mutations in the LRP4 3rd beta-propeller domain, we show that the edge of the domain regulates the MuSK signaling whereas its central cavity governs Wnt signaling. We conclude that LRP4 is a new CMS disease gene and that the 3rd beta propeller domain of LRP4 mediates the two signaling pathways in a position-specific manner.
    Print ISSN: 0964-6906
    Electronic ISSN: 1460-2083
    Topics: Biology , Medicine
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  • 8
    Publication Date: 2013-01-24
    Description: Author(s): M. Asai, K. Tsukada, M. Sakama, H. Haba, T. Ichikawa, Y. Ishii, A. Toyoshima, T. Ishii, I. Nishinaka, Y. Nagame, Y. Kasamatsu, M. Shibata, Y. Kojima, and H. Hayashi The ground-state configuration of the N =157 nucleus 259 No has been identified through α - γ coincidence and α -singles measurements. Three γ transitions were observed for the first time in the α decay of 259 No, and its decay scheme was established. The neutron 9/2 + [615] configuration was assigned to th... [Phys. Rev. C 87, 014332] Published Wed Jan 23, 2013
    Keywords: Nuclear Structure
    Print ISSN: 0556-2813
    Electronic ISSN: 1089-490X
    Topics: Physics
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  • 9
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 327-328 (Jan. 2000), p. 17-22 
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 327-328 (Jan. 2000), p. 303-306 
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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