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  • Comatricha,.  (2)
  • Polymer and Materials Science  (2)
  • Space Radiation  (2)
  • 1
    Publication Date: 2019-07-17
    Description: The energetic charged particle, interplanetary magnetic field, and plasma characteristics of the 'Bastille Day' shock and ejecta/magnetic cloud events at 1 AU occurring over the days 14-16 July 2000 are described. Profiles of MeV (WIND/LEMT) energetic ions help to organize the overall sequence of events from the solar source to 1 AU. Stressed are analyses of an outstanding magnetic cloud (MC2) starting late on 15 July and its upstream shock about 4 hours earlier in WIND magnetic field and plasma data. Also analyzed is a less certain, but likely, magnetic cloud (MC1) occurring early on 15 July; this was separated from MC2 by its upstream shock and many heliospheric current sheet (HCS) crossings. Other HCS crossings occurred throughout the 3-day period. Overall this dramatic series of interplanetary events caused a large multi-phase magnetic storm with min Dst lower than -300 nT. The very fast solar wind speed (greater than or equal to 1100 km/s) in and around the front of MC2 (for near average densities) was responsible for a very high solar wind ram pressure driving in the front of the magnetosphere to geocentric distances estimated to be as low as approx. 5 R(sub E), much lower than the geosynchronous orbit radius. This was consistent with magnetic field observations from two GOES satellites which indicated they were in the magnetosheath for extended times. A static force free field model is used to fit the two magnetic cloud profiles providing estimates of the clouds' physical and geometrical properties. MC2 was much larger than MCI, but their axes were nearly antiparallel, and their magnetic fields had the same left-handed helicity. MC2's axis and its upstream shock normal were very close to being perpendicular to each other, as might be expected if the cloud were driving the shock at the time of observation. The estimated axial magnetic flux carried by MC2 was 52 x 10(exp 20) Mx, which is about 5 times the typical magnetic flux estimated for other magnetic clouds in the WIND data over its first 4 years and is 17 times the flux of MC1. This large flux is due to both the strong axially-directed field of MC2 (46.8 nT on the axis) and the large radius (R(sub 0) = 0.189 AU) of the flux tube. MC2's average speed is consistent with the expected transit time from a halo-CME to which it is apparently related.
    Keywords: Space Radiation
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  • 2
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    In:  Persoonia - Molecular Phylogeny and Evolution of Fungi (0031-5850) vol.18 (2005) nr.4 p.485
    Publication Date: 2015-04-20
    Description: The types of Comatricha anastomosans Kowalski, C. filamentosa Meyl., C. suksdorfii Ellis & Everh. var. aggregata Meyl. and Lamproderma longifilum H. Neubert, Nowotny & K. Baumann were studied. Comatricha anastomosans is synonymized with C. filamentosa, C. suksdorfii var. aggregata with Symphytocarpus confluens (Cooke & Ellis) Ing & Nann.-Bremek. A new lectotype for C. filamentosa is proposed. The synonymy of L. longifilum with C. anastomosans is confirmed. SEM and light microscope micrographs of spores, capillitia and sporocarps are given.
    Keywords: nivicolous Myxomycetes, i ; Comatricha,. ; Lamproderma ; Symphytocarpus ; taxonomy
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
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  • 3
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    In:  Persoonia - Molecular Phylogeny and Evolution of Fungi vol. 18 no. 4, pp. 485-497
    Publication Date: 2024-01-12
    Description: The types of Comatricha anastomosans Kowalski, C. filamentosa Meyl., C. suksdorfii Ellis & Everh. var. aggregata Meyl. and Lamproderma longifilum H. Neubert, Nowotny & K. Baumann were studied. Comatricha anastomosans is synonymized with C. filamentosa, C. suksdorfii var. aggregata with Symphytocarpus confluens (Cooke & Ellis) Ing & Nann.-Bremek. A new lectotype for C. filamentosa is proposed. The synonymy of L. longifilum with C. anastomosans is confirmed. SEM and light microscope micrographs of spores, capillitia and sporocarps are given.
    Keywords: nivicolous Myxomycetes, i ; Comatricha,. ; Lamproderma ; Symphytocarpus ; taxonomy
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 4
    Publication Date: 2019-07-13
    Description: We present Van Allen Probe observations of electromagnetic ion cyclotron (EMIC) waves triggered solely due to individual substorm-injected ions in the absence of storms or compressions of the magnetosphere during 9 August 2015. The time at which the injected ions are observed directly corresponds to the onset of EMIC waves at the location of Van Allen Probe A (L = 5.5 and 18:06 magnetic local time). The injection was also seen at geosynchronous orbit by the Geostationary Operational Environmental Satellite and Los Alamos National Laboratory spacecraft, and the westward(eastward) drift of ions(electrons) was monitored by Los Alamos National Laboratory spacecraft at different local times. The azimuthal location of the injection was determined by tracing the injection signatures backward intime to their origin assuming a dipolar magnetic field of Earth. The center of this injection location wasdetermined to be close to 20:00 magnetic local time. Geostationary Operational Environmental Satelliteand ground magnetometer responses confirm substorm onset at approximately the same local time.The observed EMIC wave onsets at Van Allen Probe were also associated with a magnetic field decrease.The arrival of anisotropic ions along with the decrease in the magnetic field favors the growth of the EMICwave instability based on linear theory analysis.
    Keywords: Space Radiation
    Type: GSFC-E-DAA-TN63544 , Journal of Geophysical Research: Space Physics (e-ISSN 2169-9402); 123; 6; 4921-4938
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Acta Polymerica 30 (1979), S. 194-198 
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Investigations on the effect of the structure of some important anionic emulsifiers of the carboxyl, sulfat and sulfonate series on the emulsion polymerization of butadiene with styrene are described. The overall reaction rate vBr of emulsion copolymerization is differently affected by these compounds in dependence on the chain length of the alkyl or alkylaryl groups. This effect shows particularly in the stage of particle formation. Further effects on the decomposition of potassium peroxide disulfate caused by carboxyl, sulfate and sulfonate groups were found. No effect of the number of C atoms in the alkyl chain of carboxylic acid salts (C12—C18) was detected.
    Notes: Es werden Untersuchungen über den Einfluß der Struktur einiger wichtiger anionischer Emulgatoren der Carboxyl-Sulfat- und Sulfonatreihe auf die Emulsionscopolymerisation von Butadien/Styrol mitgeteilt. Die Verbindungen üben, in Abhängigkeit von der Kettenlänge ihres Alkyl- bzw. Alkylarylrestes, einen unterschiedlichen Einfluß auf die Bruttoreaktionsgeschwindigkeit vBr der Emulsionscopolymerisation aus. Dieser Einfluß zeigt sich besonders in der Teilchenbildungsperiode. Es wurden weiterhin Einflüsse auf den Kaliumperoxodisulfatzerfall in Abhängigkeit von der Carboxyl-, Sulfat- bzw. Sulfonatgruppe gefunden. Ein Einfluß der C-Atomzahl in der Alkylkette von Carbonsäuresalzen (C12—C18) war nicht zu erkennen.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Polyurethanes obtained by reacting mercapto-terminated oligobutadienes, decanedithiol and diisocyanate were investigated by electron microscopy and x-ray scattering. The dependence of the morphological structure on the content of short-chain dithiol is discussed. Heterogeneities in micro- and macroregions were observed, which are caused by crystalline regions and phase separation in chemically different blocks.
    Notes: Polyurethane auf der Basis von mercapto-terminierten Oligobutadienen, Decandithiol und Diisocyanat werden mittels Elektronenmikroskopie und Röntgenstreuung untersucht. Ihre morphologischen Besonderheiten werden in Abhängigkeit vom Gehalt an Kurzkettendithiol diskutiert. Es treten Heterogenitäten im Mikro- und Makrobereich auf, die durch kristalline Bereiche und Phasentrennung in chemisch unterschiedliche Blöcke bedingt sind.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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