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  • 1
    Publication Date: 2018-08-30
    Description: Author(s): M. Kracht, A. Karg, M. Feneberg, J. Bläsing, J. Schörmann, R. Goldhahn, and M. Eickhoff Despite the fact that metastable α -Ga 2 O 3 becomes increasingly interesting for applications in e . g . high-power electronics, its basic material properties remain unclear. The authors employ plasma-assisted molecular-beam epitaxy to grow r -plane-oriented thin films of this birefringent semiconductor, as that crystal orientation allows the measurement of its anisotropic optical properties. The firm knowledge of these properties allows device design to proceed, including band-gap engineering by alloying with α -In 2 O 3 and α -Al 2 O 3 . [Phys. Rev. Applied 10, 024047] Published Wed Aug 29, 2018
    Electronic ISSN: 2331-7019
    Topics: Physics
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  • 2
    Publication Date: 2014-01-31
    Description: Cultivated bacteria such as actinomycetes are a highly useful source of biomedically important natural products. However, such 'talented' producers represent only a minute fraction of the entire, mostly uncultivated, prokaryotic diversity. The uncultured majority is generally perceived as a large, untapped resource of new drug candidates, but so far it is unknown whether taxa containing talented bacteria indeed exist. Here we report the single-cell- and metagenomics-based discovery of such producers. Two phylotypes of the candidate genus 'Entotheonella' with genomes of greater than 9 megabases and multiple, distinct biosynthetic gene clusters co-inhabit the chemically and microbially rich marine sponge Theonella swinhoei. Almost all bioactive polyketides and peptides known from this animal were attributed to a single phylotype. 'Entotheonella' spp. are widely distributed in sponges and belong to an environmental taxon proposed here as candidate phylum 'Tectomicrobia'. The pronounced bioactivities and chemical uniqueness of 'Entotheonella' compounds provide significant opportunities for ecological studies and drug discovery.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wilson, Micheal C -- Mori, Tetsushi -- Ruckert, Christian -- Uria, Agustinus R -- Helf, Maximilian J -- Takada, Kentaro -- Gernert, Christine -- Steffens, Ursula A E -- Heycke, Nina -- Schmitt, Susanne -- Rinke, Christian -- Helfrich, Eric J N -- Brachmann, Alexander O -- Gurgui, Cristian -- Wakimoto, Toshiyuki -- Kracht, Matthias -- Crusemann, Max -- Hentschel, Ute -- Abe, Ikuro -- Matsunaga, Shigeki -- Kalinowski, Jorn -- Takeyama, Haruko -- Piel, Jorn -- England -- Nature. 2014 Feb 6;506(7486):58-62. doi: 10.1038/nature12959. Epub 2014 Jan 29.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Institute of Microbiology, Eidgenossische Technische Hochschule Zurich, Vladimir-Prelog-Weg 4, 8093 Zurich, Switzerland [2] Kekule Institute of Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany [3]. ; 1] Faculty of Science and Engineering, Waseda University Center for Advanced Biomedical Sciences, 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8480, Japan [2]. ; Institute for Genome Research and Systems Biology, Center for Biotechnology, Universitat Bielefeld, Universitatstrasse 25, 33594 Bielefeld, Germany. ; 1] Institute of Microbiology, Eidgenossische Technische Hochschule Zurich, Vladimir-Prelog-Weg 4, 8093 Zurich, Switzerland [2] Kekule Institute of Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany. ; Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan. ; Department of Botany II, Julius-von-Sachs Institute for Biological Sciences, University of Wurzburg, Julius-von-Sachs-Platz 3, 97082 Wurzburg, Germany. ; Kekule Institute of Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany. ; Department of Earth and Environmental Sciences, Palaeontology and Geobiology, Ludwig Maximilians University Munich, Richard-Wagner-Strasse 10, 80333 Munich, Germany. ; Department of Energy Joint Genome Institute, 2800 Mitchell Drive, Walnut Creek, California 94598, USA. ; Institute of Microbiology, Eidgenossische Technische Hochschule Zurich, Vladimir-Prelog-Weg 4, 8093 Zurich, Switzerland. ; Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan. ; Faculty of Science and Engineering, Waseda University Center for Advanced Biomedical Sciences, 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8480, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24476823" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biosynthetic Pathways/genetics ; Deltaproteobacteria/*classification/genetics/*metabolism/physiology ; *Drug Discovery ; Environmental Microbiology ; Genes, Bacterial/genetics ; Genome, Bacterial/genetics ; Metagenomics ; Molecular Sequence Data ; Multigene Family/genetics ; Peptides/metabolism ; Polyketides/metabolism ; Porifera/metabolism/microbiology ; Single-Cell Analysis ; Symbiosis
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 2013-10-25
    Description: Transcriptional regulation of immediate-early gene response by THOC5, a member of mRNA export complex, contributes to the M-CSF-induced macrophage differentiation Cell Death and Disease 4, e879 (October 2013). doi:10.1038/cddis.2013.409 Authors: D DH Tran, S Saran, O Dittrich-Breiholz, A JK Williamson, S Klebba-Färber, A Koch, M Kracht, A D Whetton & T Tamura
    Keywords: macrophage differentiationM-CSF signalingmRNA export complex THOtamoxifen-inducible knockout cellstranscriptome analysisimmediate-early genes response
    Electronic ISSN: 2041-4889
    Topics: Biology , Medicine
    Published by Springer Nature
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  • 4
    Publication Date: 2017-11-04
    Description: Author(s): M. Kracht, A. Karg, J. Schörmann, M. Weinhold, D. Zink, F. Michel, M. Rohnke, M. Schowalter, B. Gerken, A. Rosenauer, P. J. Klar, J. Janek, and M. Eickhoff Metastable ϵ -gallium oxide is expected to have very good properties for high-power electronics, combining the large band gap and high breakdown field of β -Ga 2 O 3 with a very high spontaneous polarization. Unfortunately, synthesizing ϵ -Ga 2 O 3 is quite tricky, yet the authors have managed it. Introducing tin avoids the formation of volatile suboxides, which leadsto a widened growth window in which ϵ -gallium oxide can beformed. Furthermore, the growth mechanism that the authors revealcould be relevant for the growth of any binary oxide. [Phys. Rev. Applied 8, 054002] Published Fri Nov 03, 2017
    Electronic ISSN: 2331-7019
    Topics: Physics
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  • 5
    Publication Date: 2015-07-25
    Description: The self-assembled formation of ordered, vertically stacked rocksalt/wurtzite Mg x Zn 1−x O heterostructures by planar phase separation is shown. These heterostructures form quasi “natural” two-dimensional hetero-interfaces between the different phases upon annealing of MgO-oversaturated wurtzite Mg x Zn 1−x O layers grown by plasma-assisted molecular beam epitaxy on c-plane sapphire substrates. The optical absorption spectra show a red shift simultaneous with the appearance of a cubic phase upon annealing at temperatures between 900 °C and 1000 °C. Transmission electron microscopy reveals that these effects are caused by phase separation leading to the formation of a vertically ordered rock salt/wurtzite heterostructures. To explain these observations, we suggest a phase separation epitaxy model that considers this process being initiated by the formation of a cubic (Mg,Zn)Al 2 O 4 spinel layer at the interface to the sapphire substrate, acting as a planar seed for the epitaxial precipitation of rock salt Mg x Zn 1−x O. The equilibrium fraction x of magnesium in the resulting wurtzite (rock salt) layers is approximately 0.15 (0.85), independent of the MgO content of the as-grown layer and determined by the annealing temperature. This model is confirmed by photoluminescence analysis of the resulting layer systems after different annealing temperatures. In addition, we show that the thermal annealing process results in a significant reduction in the density of edge- and screw-type dislocations, providing the possibility to fabricate high quality templates for quasi-homoepitaxial growth.
    Print ISSN: 0021-8979
    Electronic ISSN: 1089-7550
    Topics: Physics
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  • 6
    ISSN: 0014-5793
    Keywords: Interleukin 1 ; MAP kinase ; MAP kinase kinase ; Tumour necrosis factor
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1573-0972
    Keywords: Database format ; plasmids ; transporsons ; viruses
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The PVT format described here has been designed to store and retrieve genetic data on plasmids, viruses or transposons with special focus on their applications. Both naturally-occurring and engineered elements can be included in it. A variety of data can be accommodated in fields that are grouped in blocks: name and type of element, database administration, element administration, history, propagation, selection and host, biological properties, cloned insert and applications. The number of fields, now 157, can be expanded as required. Most properties can be described in simple logical fields. The format is organized to permit rapid searches and to facilitate communication between database and user; connection with culture and/or DNA collections is also envisaged and adequate fields for these tasks have been provided. The format allows cross-reference with that originated by the Microbial Information Network Europe (MINE) for computer storage and handling of bacterial or fungal strain data.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Computing 11 (1973), S. 73-79 
    ISSN: 1436-5057
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Summary This paper is concerned with the investigation of two methods for obtaining an interval analysis in vector spaces (ordered and normed, respectively) and with relations between those two approaches due toO. Mayer [5] andW. Hahn [2].
    Notes: Zusammenfassung In dieser Arbeit werden die Wege vonO. Mayer [5] undW. Hahn [2], zu einer Intervallrechnung in linearen Räumen (mit verträglicher Halbordnung bzw. mit Norm) zu gelangen, näher untersucht und Beziehungen zwischen den beiden Konzepten aufgezeigt.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Algebra universalis 33 (1995), S. 142-146 
    ISSN: 1420-8911
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Journal of logic, language and information 4 (1995), S. 359-380 
    ISSN: 1572-9583
    Source: Springer Online Journal Archives 1860-2000
    Topics: Linguistics and Literary Studies , Computer Science
    Type of Medium: Electronic Resource
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