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  • American Institute of Physics (AIP)  (2)
  • Nature Publishing Group  (1)
  • Würzburg : Freunde der Würzburger Geowiss.  (1)
  • 1985-1989  (4)
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  • 1
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Spurenfossilien aus dem Kulm (Unterkarbon) des Frankenwaldes (1989)
    Würzburg : Freunde der Würzburger Geowiss.
    Dazugehörige Bände
    Details Verfügbarkeit
    Signatur: SR 93.0596(1)
    In: Beringeria
    Materialart: Schriftenreihen ausleihbar
    Seiten: 143 S.
    Serie: Beringeria 1
    Sprache: Deutsch
    Standort: Kompaktmagazin unten
    Zweigbibliothek: GFZ Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Spectral characteristics of plasma emission during ArF excimer laser ablation of YBa2Cu3O7 (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 469-471 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: In order to characterize the laser ablation process as it relates to the deposition of high Tc superconducting thin films, optical emission spectra produced during ArF excimer laser ablation of the high Tc superconductor YBa2Cu3O7 were studied. The population of excited states within the gas phase blow-off material depends strongly on excimer laser fluence at 193 nm. Ablation using relatively low excimer laser fluences produces a significant fraction of YO in the gas phase. The plasmas derived from ablation of targets made from the high Tc material are similar to plasmas observed from ablation of the individual components BaCO3, CuO, and Y2O3.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.101555
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    Spectra and structure of small ring compounds. XLVIII. Conformational stability of methylcyclobutane from low frequency Raman data of the gas (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 545-551 
    Details
    ISSN: 1089-7690
    Quelle: AIP Digital Archive
    Thema: Physik , Chemie und Pharmazie
    Notizen: The low frequency (500–80 cm−1) Raman spectra of gaseous methylcyclobutane, c-C4H7CH3, and methyl-d3-cyclobutane have been recorded. A series of Q branches beginning at 161 cm−1 for the light molecule and 154 cm−1 for the d3 compound with successive transitions falling to lower frequencies have been assigned to the ring puckering vibrations of both the low energy equatorial and high energy axial conformers. These data have been fitted to an asymmetric potential function of the form: V(cm−1)=(4.78±0.10)×105X4−(3.08±0.04)×104X2 +(2.18±0.1)×104X3 with an assumed reduced mass of 160 amu for the light compound. Utilizing this potential the difference between the puckering angles for the two conformers was calculated to be 4.3° with the equatorial conformer having the larger value of 20.7°. A similar potential was obtained for the d3 molecule. The energy difference between the equatorial and axial forms was found to be 247±20 cm−1 (706 cal/mol) and a barrier of 641±20 cm−1 (1.83 kcal/mol) was found for the interconversion. Experimental values for the ΔH of both the liquid (354±179 cm−1) and gas (295±75 cm−1) from relative intensities of different Raman band pairs over 85 and 37 °C temperature ranges, respectively, were found to be consistent with the value obtained from the potential function. These results are compared to the corresponding quantities for similar molecules.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.452305
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Assembly of micelles into higher-order structures with increasing salt concentration (1987)
    [s.l.] : Nature Publishing Group
    Nature 327 (1987), S. 321-324 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] For this study we used mixtures of 1-10% by weight each of surfactant and co-surfactant dissolved in salt solutions. The phase behaviour of such systems has recently been described by Benton and Miller4, who found that progressive addition of salt to an aqueous micellar dispersion (I) results in ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/327321a0
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
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