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  • 1
    Electronic Resource
    Electronic Resource
    Electron magnetohydrodynamic turbulence (1999)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 6 (1999), S. 751-758 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Electron magnetohydrodynamic (EMHD) turbulence is studied in two- and three-dimensional (2D and 3D) systems. Results in 2D are particularly noteworthy. Energy dissipation rates are found to be independent of the diffusion coefficients. The energy spectrum follows a k−5/3 law for kde〉1 and k−7/3 for kde〈1, which is consistent with a local spectral energy transfer independent of the linear wave properties, contrary to magnetohydrodynamic (MHD) turbulence, where the Alfvén effect dominates the transfer dynamics. In 3D spectral properties are similar to those in 2D. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.873312
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  • 2
    Electronic Resource
    Electronic Resource
    Instability of a magnetized plasma jet (1998)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 5 (1998), S. 2485-2488 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The stability characteristics of a plasma jet V(x)=sech2 x embedded in a parallel magnetic field B(x)=B0 tanh x are investigated. The Kelvin–Helmholtz kink mode, which dominates at small B0, is stabilized at B0=0.46, while the pinch mode remains unstable up to B0=0.96. Contrary to a nonmagnetized jet, for finite B0 the kink mode saturates quasilinearly by broadening the jet, such that B0/Vmax becomes larger than the marginal value 0.46. Including finite resistivity the nonlinear behavior is eventually governed by the tearing mode for all values of B0≠0, consisting of a single plasmoid moving along the jet. Hence the shear flow cannot stabilize the tearing mode, so that the apparent tearing stability of resistive current sheets observed in numerical simulations of magnetic reconnection is only due to finite-length effects. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.872931
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  • 3
    Electronic Resource
    Electronic Resource
    Two-fluid theory of collisionless magnetic reconnection (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 1002-1009 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Theoretical studies of collisionless reconnection in the framework of two-fluid theory are presented. In the high-β case (β(approximately-greater-than)1) reconnection is controlled by the whistler mode, leading to decoupling of ions from electrons on scales 〈c/ωpi. Though reconnection requires electron inertia, the reconnection rate is independent thereof, controlled only by ion inertia. Reconnection is hence much faster than in the absence of the Hall term. In the opposite limit of small β the strong axial field suppresses the whistler mode. Hence ions have to follow the electrons in the narrow reconnection layer δ∼c/ωpe, forming a macroscopic current sheet which strongly reduces the reconnection rate. Theoretical scaling laws are confirmed by numerical simulations. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.872211
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  • 4
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    Unknown
    Zur Differenziertheit des Lösungsprozesses gesellschaftlicher Widersprüche (1974)
    Berlin : Periodicals Archive Online (PAO)
    Deutsche Zeitschrift für Philosophie. 22:1 (1974) 23 
    Details
    ISSN: 0012-1045
    Topics: Philosophy
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:4085-1974-022-01-000002
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  • 5
    Electronic Resource
    Electronic Resource
    Delayed diagnosis of a spontaneous atlanto-axial rotatory dislocation (1984)
    Springer
    Archives of orthopaedic and trauma surgery 103 (1984), S. 212-214 
    Details
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Ein 3jähriger Junge entwickelte ohne ersichtlichen spezifischen Grund einen Schiefhals. Obwohl unmittelbar nach Auftreten der Symptome eine Behandlung begonnen wurde, konnte keine Besserung erzielt werden. 4 Monate später angefertigte Röntgenbilder zeigten eine Vergrößßerung des Abstandes zwischen Dens und Atlas. Trotz dieses Befundes wurde der Patient mit Tenotomie und intensiver Physiotherapie behandelt, der Schiefhals aber blieb bestehen. 2 Jahre später deckten ein Tomogramm and ein Computertomogramm eine komplette, rotationsbedingte Verrenkung zwischen Atlas und Axis auf. In diesem Stadium war eine ursächliche Behandlung nicht mehr möglich. Es konnte nur die physiotherapeutische Behandlung fortgesetzt werden mit dem Ziel, die Kopfstellung zu verbessern.
    Notes: Summary Without any known specific cause a 3-year-old boy developed a torticollis. Although the symptoms were treated immediately there was no improvement. Four months later X-rays showed that the dens-atlas distance was enlarged. In spite of this, he was treated by tenotomy and intensive physiotherapy, but the torticollis remained. Two years later a tomogram and a CT showed a complete rotatory dislocation between atlas and axis. At this stage it was impossible to treat the original cause. Physiotherapy was continued to improve the position of the head.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00435556
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  • 6
    Electronic Resource
    Electronic Resource
    Aminosäuren-zusammensetzung von epidermis-fraktionen bei meerschweinchen und haarlosen mäusen (1971)
    Springer
    Archives of dermatological research 240 (1971), S. 173-183 
    Details
    ISSN: 1432-069X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Mehrere nach Extraktion mit Trichloressigsäure oder KOH erhaltene Fraktionen isolierter Epidermis von Meerschweinchen und haarlosen Mäusen wurden auf ihre Aminosäuren-Zusammensetzung und die verwandter Substanzen untersucht. Die Ergebnisse werden im Hinblick auf entsprechende Befunde insbesondere menschlicher Epidermis und Verhornungsprodukte diskutiert.
    Notes: Summary Several fractions of isolated epidermis of guinea pigs and hairless mice, obtained after extraction with trichloracetic acid or KOH respectively, were investigated for the composition of amino acids and related substances. The results are discussed with regard to similar observations, especially in human epidermis and cornified products.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01061630
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  • 7
    Electronic Resource
    Electronic Resource
    Freie aminosäuren und verwandte Verbindungen in der abschabbaren Hornschicht unbefallener Haut von mikrobiellen Ekzematikern und Hautgesunden (1971)
    Springer
    Archives of dermatological research 242 (1971), S. 87-96 
    Details
    ISSN: 1432-069X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Freie Aminosäuren, NH3 und Urea des oberflächlichen Stratum corneum disjunctum unbefallener Haut von mikrobiellen Ekzematikern und von gesunden Kontrollpersonen wurden durch Säulenchromatographie bestimmt. Urocaninsäure wurde nach papierchromatographischer Isolierung spektrometrisch und mit Hilfe der Isotopen-Verdünnungsanalyse quantitativ erfaßt. Ferner wurden die α-Amino-N-Werte bezogen auf Hornschichtschabsel-Frischgewicht ermittelt. Die meisten der untersuchten Substanzen zeigten keine auffälligen Unterschiede zwischen den beiden Gruppen. Nur für Histidin, Glutaminsäure, allo-Isoleucin (P 〈 0,05) und Tryptophan (P 〈 0,01) waren Differenzen festzustellen. Die Ergebnisse wurden diskutiert.
    Notes: Summary Free amino acids, ammonia and urea from the superficial stratum corneum disjunctum of uninvolved skin of patients with microbiotic eczema and of healthy controls were determined by column chromatography. After separation by paper chromatography, urocanic acid was assayed spectrometrically and by use of isotope dilution analysis. Furthermore, the values for α-amino-N referring to the fresh weight of the scraped horny material were estimated. Most of the investigated substances showed no obvious changes between the two groups. Only differences were found for histidine, glutamic acid, allo-isoleucine (P 〈 0.05) and for tryptophan (P 〈 0.01). The results are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00595292
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  • 8
    Electronic Resource
    Electronic Resource
    Zur aufklärung der natur „atypischer“ adenin-abbauprodukte der epidermis haarloser mäuse (1972)
    Springer
    Archives of dermatological research 245 (1972), S. 154-162 
    Details
    ISSN: 1432-069X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Zwei bislang unbekannte Metaboliten von Adenin-C14, die bei Inkubation mit isolierter Epidermis entstehen, scheinen auf einerdirekten Aktion von Xanthin-Oxydase zu beruhen, da Zusätze wie Hypoxanthin (im Überschuß des Tracers) oder Allopurinol als Hemmer dieses Enzyms ihre Bildung bremsen. Der gleiche Effekt durch Zugabe von ATP basiert offenbar auf der bevorzugten Desaminierung des Adenin-Tracers via Nucleosid- bzw. Nucleotid-Formation, wodurch er dem „Nebenweg“ entzogen wird.
    Notes: Summary Two unknown metabolites of adenine-C14 seem to be produced bydirect action of xanthine oxidase in separated epidermis. Added hypoxanthine (in excess of the tracer) or allopurinol as inhibitors of this enzyme stopped its formation. The same effect was caused by added ATP. The reaction is apparently based upon prefered deamination of the tracer by forming nucleosids or nucleotids, respectively, by which it is excluded from the “by-pathway”.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00584518
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  • 9
    Electronic Resource
    Electronic Resource
    Zur Biochemie der Epidermis (1972)
    Springer
    Archives of dermatological research 244 (1972), S. 26-30 
    Details
    ISSN: 1432-069X
    Keywords: Epidermis ; Histidine proteins ; Glycine proteins ; Cysteine proteins ; Epidermis fractions ; Distribution of serine-14C
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00600123
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  • 10
    Electronic Resource
    Electronic Resource
    Zur Frage Citrullin-haltiger Epidermis-Proteine (1973)
    Springer
    Archives of dermatological research 246 (1973), S. 167-174 
    Details
    ISSN: 1432-069X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Nach intradermaler Applikation von Arginin-C-14 an Meerschweinchen bzw. von Ornithin-C-14 an haarlosen Mäusen wurde jeweils ein Radiometabolit in den Hydrolysaten großmolekularer Epidermis-(Protein-)Fraktionen gefunden, der sich bei Säulenchromatographie an Dowex 50 wie Citrullin verhielt. In der kleinmolekularen Fraktion der Epidermis („Wasserlösliches“ WI) lagen als Radiometaboliten offenbar Citrullin und Harnstoff vor.
    Notes: Summary After intracutaneous injection of arginine-C-14 into guinea pigs or of ornithine-C-14 into hairless mice, respectively, a radiometabolite could be found in hydrolyzed, macromolecular epidermis fractions, which by column chromatography on Dowex 50 showed the same behavior as citrulline. In the ultrafiltrable fraction of the epidermis (“the water-soluble substances”), the detected radiometabolites seemed to be citrulline and urea.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00595536
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