Bibliothek

X
feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
Filter
  • 34.50.Fa  (3)
  • polymer dynamics  (2)
  • 2-oxo-4-methylglutaric acid  (1)
  • 1
    Digitale Medien
    Digitale Medien
    An unusual distribution of 4-substituted glutamic acids in Sophora japonica
    Amsterdam : Elsevier
    Phytochemistry 26 (1987), S. 2477-2480 
    Details
    ISSN: 0031-9422
    Schlagwort(e): 2-oxo-4-methylglutaric acid ; 4-methyleneglutamic acid ; 4-methyleneglutamine ; 4-methylglutamic acid ; 4-substituted glutamic acids ; Leguminoseae ; Sophora japonica ; transamination.
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0031-9422(00)83857-1
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    Mapping of the relaxation patterns of polymer melts with linear flexible molecules of uniform length (1997)
    Springer
    Rheologica acta 36 (1997), S. 330-344 
    Details
    ISSN: 1435-1528
    Schlagwort(e): Relaxation time spectrum ; monodisperse polymers ; hypergeometric function ; incomplete gamma function ; linear viscoelasticity ; polymer dynamics
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: Abstract The linear viscoelastic material functions of linear flexible polymers of uniform length are calculated from the BSW spectrum (Baumgaertel et al., 1990, 1992), and explicit analytic expressions are presented for several of the most common material functions for transient and dynamic experiments. However, numerical calculations are presented whenever needed. The BSW spectrum was determined from experimental G″, G″ data of two sets of molten polymers of narrow molecular weight distribution, polystyrene and polybutadiene. The purpose of the mapping is to show a wide range of viscoelastic behavior which otherwise is not available in such comprehensive form. Experimental check of these predictions is still needed in most cases. Also, some insight into the predictions for the non-linear (including the non-equilibrium) viscoelastic behavior is achieved by studying two particular experiments: the start-up of uniaxial extension at constant rate and the start-up of shear flow at constant rate.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00366674
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    Mapping of the relaxation patterns of polymer melts with linear flexible molecules of uniform length (1997)
    Springer
    Rheologica acta 36 (1997), S. 330-344 
    Details
    ISSN: 1435-1528
    Schlagwort(e): Key words Relaxation time ; spectrum ; monodisperse polymers ; hypergeometric function ; incomplete gamma function ; linear viscoelasticity ; polymer dynamics
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: Abstract The linear viscoelastic material functions of linear flexible polymers of uniform length are calculated from the BSW spectrum (Baumgaertel et al., 1990, 1992), and explicit analytic expressions are presented for several of the most common material functions for transient and dynamic experiments. However, numerical calculations are presented whenever needed. The BSW spectrum was determined from experimental G′,G″′ data of two sets of molten polymers of narrow molecular weight distribution, polystyrene and polybutadiene. The purpose of the mapping is to show a wide range of viscoelastic behavior which otherwise is not available in such comprehensive form. Experimental check of these predictions is still needed in most cases. Also, some insight into the predictions for the non-linear (including the non-equilibrium) viscoelastic behavior is achieved by studying two particular experiments: the start-up of uniaxial extension at constant rate and the start-up of shear flow at constant rate.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00366674
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 4
    Digitale Medien
    Digitale Medien
    Study of the beam-foil excitation mechanism by use of sulfur and chlorine projectiles (1988)
    Springer
    The European physical journal 10 (1988), S. 457-466 
    Details
    ISSN: 1434-6079
    Schlagwort(e): 34.50.Fa ; 34.70.+e
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Experimental relative level population data have been analysed for beam-foil excited S VI at 3 MeV and C1 VII at 5.5 MeV. For S VI, the level population is fairly independent of the principal quantum numbern (4≦n≦9), whereas a pronounced maximum is found for levels withn=8 in Cl VII. A two-step model has been applied to calculate theoretical values for the relative level populations. Satisfyingly good agreement is found between experiment and theory. The results confirm the previously proposed idea that at these fairly low projectile velocities, final projectile levels whose binding energies are comparable to or smaller than the binding energies for electrons in the valence band of the foil are mainly populated by transfer of valence band electrons, when the projectile leaves the foil.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01425764
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 5
    Digitale Medien
    Digitale Medien
    Capture of polarized electrons into excited terms of fast atoms during grazing surface collisions (1992)
    Springer
    The European physical journal 23 (1992), S. 41-53 
    Details
    ISSN: 1434-6079
    Schlagwort(e): 34.50.Fa
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Fast ions are scattered from magnetized surfaces under grazing angles of incidence. During the interaction with the surface charge exchange is effective and results in a population of stable and excited atomic terms. This capture of electrons is characterized by anisotropic distributions of atomic orbital angular momenta and in addition — for magnetized targets — by anisotropic distributions of electronic spins. We will discuss in some detail, how these anisotropic distributions can be studied via the analysis of the state of polarization of the fluorescent light, emitted in electronic transitions from excited terms of free atoms after the impact with the surface. We show that a defined variation of the magnetization of the target affects the polarization of the emitted light in a characteristic way, which allows to deduce the electronic spin polarization of the atoms. The method implies some perspectives with respect to the study of magnetic properties of the vacuum-solid interface well above the topmost layer of surface atoms.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01436701
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 6
    Digitale Medien
    Digitale Medien
    Population of NaI-terms in grazing ion surface collisions (1990)
    Springer
    The European physical journal 17 (1990), S. 109-117 
    Details
    ISSN: 1434-6079
    Schlagwort(e): 34.50.Fa
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The population of NaI 3p- and 4d-terms after grazing collisions of fast Na+-ions with a clean Al(111)-surface is studied via optical spectrometry. The ratio of level populationsN(3p)/N(4d) is investigated in dependence on projectile velocity under different experimental conditions. For clean targets and a defined geometry of detection a threshold for excitation of the 4d-term is observed. The data are described by a model of population via resonant one electron tunneling which incorporates the effects of the projectile velocity.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01437664
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...