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  • 1975-1979  (1)
  • 1950-1954  (1)
  • 1930-1934  (12)
  • 1
    Electronic Resource
    Electronic Resource
    The Action of a Crystal as a Two-Dimensional Lattice in Diffracting Electrons. (1931)
    [s.l.] : Nature Publishing Group
    Nature 127 (1931), S. 738-739 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] KIKUCHIl first described examples of electron diffraction in which a crystal appeared to behave as a two-dimensional or cross-grating. Very thin sheets of mica give an equilateral net-like pattern of diffracted beams on the photographic plate (the N pattern), as if the only ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/127738a0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Über die Struktur dünner Kristallschichten (1932)
    Springer
    The European physical journal 76 (1932), S. 576-596 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Für das Studium der Struktur dünner Kristallschichten sind die Elektroneninterferenzen besonders gut geeignet. Sie gestatten die Untersuchung dünnster Schichten bei niedrigen Expositionszeiten und bei kleinem Strahlquerschnitt. Systematische Untersuchungen an dünnen Schichten von etwa 20 verschiedenen Substanzen haben ergeben, daß in Schichten, die bei Atmosphärendruck aufgedampft sind, fast ausnahmslos, und in Schichten, die im Vakuum aufgedampft sind, sehr häufig eine geregelte Orientierung der Kristallkörner besteht. Diese Faserstruktur ist gewöhnlich dadurch charakterisiert, daß eine bestimmte Netzebene (mit mehr oder weniger großer Streuung) parallel zu der ebenen Unterlage orientiert ist. Die theoretische Deutung der entsprechenden Faserdiagramme ist sowohl bei senkrechter wie auch bei schiefer Durchstrahlung der kristallinen Schicht besonders einfach, weil die Wellenlänge der verwendeten Elektronenstrahlen klein gegenüber dem Netzebenenabstand ist. Auf der anderen Seite beobachtet man bei langsamem Aufdampfen einer dünnen Schicht im Vakuum zu Anfang stets eine mehr oder weniger starke Verbreiterung der Interferenzringe, die auf eine sehr geringe Korngröße, d. h. auf einen „kolloidalen Zustand“ der Schicht schließen läßt. Mit wachsender Schichtdicke und mit wachsender Verdampfungsgeschwindigkeit nimmt im allgemeinen die Korngröße zu. An geeigneten Kristallen (Cd J2) kann man aber auch den (bei Zimmertemperatur) spontanen Übergang aus dem kolloidalen Zustand regelloser Ver∈ilung in den „grobkristallinen“ Zustand vollkommener Orientierung bzw. schließlich zum orientierten Einkristall direkt verfolgen; mit diesem Übergang ist nicht nur ein spontanes Wachstum der Kristalle auf ein Vielfaches ihrer ursprünglichen Größe, sondern auch die räumliche Ordnung der anfangs regellos verteilten Kristallite verknüpft.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01341933
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Polish on Metals (1932)
    [s.l.] : Nature Publishing Group
    Nature 129 (1932), S. 545-545 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] MR. R. C. FRENCH has reported on electron diffraction experiments on polished metal surfaces (copper, silver).1 The fact that the diffraction rings become more and more diffuse if the surface is carefully polished is, he concludes, an experimental confirmation of Sir George ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/129545a0
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Activation and inhibition of muscle and cutaneous postganglionic neurones to hindlimb during hypothalamically induced vasoconstriction and atropine-sensitive vasodilation (1976)
    Springer
    Pflügers Archiv 361 (1976), S. 231-240 
    Details
    ISSN: 1432-2013
    Keywords: Vasoconstrictors ; Vasodilators ; Muscle ; Hypothalamic stimulation ; Atropinesensitive vasodilation ; Single unit analysis ; Cat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary 1. Discharge patterns in postganglionic neurones to muscle and to hairy skin of the hindlimb of chloralose anaesthetized cats were investigated during electrical hypothalamic stimulation which induced either vasoconstriction or atropine sensitive vasodilation in the skeletal muscle. 2. Spontaneously active postganglionic neurones to muscle were activated both during hypothalamically induced vasoconstriction and active vasodilation. Stimulation of the hypothalamic vasodilator area induced mostly a sequence of activation-depression-activation in these neurones. Stimulation of cutaneous Group IV afferents elicited reflexes in these neurones; repetitive high frequency stimulation of large diameter afferents in the vago-depressor nerve produced depression of spontaneous activity followed by a postinhibitory excitation. The characteristics of these neurones fit those that would be expected of vasoconstrictors. 3. Normally inactive postganglionic neurones to skeletal muscle could only be activated during hypothalamically induced atropine sensitive vasodilation. These neurones exhibit no reflexes on somatic stimulation. The axons of these neurones conduct faster than those of the spontaneously active postganglionic neurones. It is likely that they are cholinergic vasodilator neurones. 4. Most of the cutaneous postganglionic neurones to hairy skin were activated during stimulation of both the hypothalamic vasoconstrictor and the vasodilator areas. These neurones have the characteristics of cutaneous vasoconstrictor neurones. Part of the cutaneous not spontaneously active postganglionic neurones could neither be activated from the hypothalamus nor by somatic stimuli.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00587287
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  • 5
    Electronic Resource
    Electronic Resource
    Bemerkung zur Intensität der Elektroneninterferenzen (1930)
    Springer
    Naturwissenschaften 18 (1930), S. 84-84 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01492424
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  • 6
    Electronic Resource
    Electronic Resource
    Über Elektroneninterferenzen an dünnen Zelluloid- und Kollodiumhäutchen (1931)
    Springer
    Naturwissenschaften 19 (1931), S. 463-464 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01525330
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  • 7
    Electronic Resource
    Electronic Resource
    Besprechungen (1931)
    Springer
    Naturwissenschaften 19 (1931), S. 860-869 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01516225
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  • 8
    Electronic Resource
    Electronic Resource
    Besprechungen (1932)
    Springer
    Naturwissenschaften 20 (1932), S. 332-335 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01504632
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  • 9
    Electronic Resource
    Electronic Resource
    Über die Struktur extrem dünner Kristallschichten (1932)
    Springer
    Naturwissenschaften 20 (1932), S. 123-124 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01503462
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  • 10
    Electronic Resource
    Electronic Resource
    Nebelkammeraufnahmen der Atomzertrümmerung durch schnelle Protonen (1933)
    Springer
    Naturwissenschaften 21 (1933), S. 250-251 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01504279
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