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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 31 (1975), S. 88-95 
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: For all space groups the groups of inner automorphisms are given. They are isomorphic with groups of motions, but fall into four sets according to their dimension. In the triclinic and monoclinic systems, however, the corresponding groups of all automorphisms cannot be represented by groups of motions. These groups of automorphisms therefore are only tabulated for the other cases. The relation between groups of automorphisms and Cheshire groups is discussed. By means of automorphisms sets of equivalent points are combined to "Konfigurationslagen'. For these complete tables are included.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 32 (1976), S. 225-232 
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: An interpenetrating sphere packing is defined as a set of crystallographically equivalent spheres, which form two or more sphere packings without mutual contact. All types of interpenetrating sphere packings with cubic symmetry have been deduced, using the known symmetry regions for cubic space groups. These 39 types show 12 different kinds of interpenetration. Different types are called related if an interpenetrating sphere packing of one type can be generated from another one by omitting contacts or spheres. All such relations are tabulated.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 29 (1978), S. 179-184 
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The room temperature near-normal incidence reflectance spectra for SrTiO3 and BaTiO3 have been measured in the energy region 10 to 32 eV. The optical constants for the region 0 to 32eV have been derived from a Kramers-Kronig analysis by including earlier measurements for the low energy region. For SrTiO3 five peaks in the Ti3d derived conduction band density of states have been found on the basis of experimental data only, neglecting excitonic effects. The energies of these peaks are in excellent agreement with peaks in the density of states calculated by Mattheiss. The results for BaTiO3 could not be interpreted as unambiguously in such a scheme. Alternatively, some of the transitions could be interpreted as being due to core level excitons.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 17 (1979), S. 395-407 
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Résumé On a développé, pour l'étude des courbes ATD obtenues par voie d'expériences, des relations et des programmes FORTRAN IV qui permettent de calculer les paramètres d'activation généraux et initiaux et d'autres grandeurs importantes, comme l'estimation de la demi-largeur et le facteur de forme corrigé pour une constante de cellule infiniment élevée et enfin, la projection simultanée des données d'expériences et théoriques de la courbe d'ATD sur un terminal. On a étudié quelques réactions bimoléculaires afin de reconnaître les réactions concurrentes et consécutives et d'estimer les paramètres d'activation.
    Abstract: Zusammenfassung Zur Untersuchung experimenteller DTA-Kurven homogener Lösungsreaktionen wurden analytische Beziehungen und FORTRAN IV-Programme entwickelt, die eine Berechnung von Brutto- und Anfangs-Aktivierungsdaten und aller anderen signifikanten Größen, eine Bestimmung von Halbwertsbreite und Formfaktor und deren Korrektur auf unendlich hohe Zellenkonstante und schließlich die simultane Projektion der experimentellen und der theoretischen DTA-Kurve auf einem Terminal ermöglichen. Einige bimolekulare Reaktionen wurden auf Anwesenheit von Neben oder Folgereaktionen geprüft und ihre Aktivierungsdaten abgeschätzt.
    Notes: Abstract For the study of experimental DTA curves, analytical relationships and FORTRAN IV programmes were developed which make possible calculation of overall and initial activation parameters and other important quantities, determination of half-width and shape index referred to an infinitely high cell constant and, finally, simultaneous projection of the experimental and the theoretical DTA curve on a terminal. Some bimolecular reactions were studied in order to recognize concurrent or consecutive reactions and to estimate the activation parameters.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 65 (1978), S. 649-650 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 293 (1978), S. 208-210 
    ISSN: 1618-2650
    Keywords: Analyse von Kohlenwasserstoffen, aromat. polycyl. ; Fluorimetrie ; Fluorescenzlöschung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Quenchofluorimetrie mit Elektronendonoren gestattet die selektive Erkennung und Bestimmung von alternierenden polycyclischen aromatischen Kohlenwasserstoffen (PAK) in Gegenwart nicht-alternierender PAK und ergänzt so die Quenchofluorimetrie mit Elektronenacceptoren. Komplementäre Quenchofluorimetrie mit Elektronendonoren und-acceptoren ist eine leistungsfähige Methode in der Analytik von PAK's.
    Notes: Summary Quenchofluorimetry with electron donors allows the selective detection and determination of alternant polycyclic aromatic hydrocarbons (PAH) in the presence of non-alternant PAH's, thus completing quenchofluorimetry with electron acceptors. Complementary quenchofluorimetry with electron donors and acceptors is an efficient method in the analysis of PAH's.
    Type of Medium: Electronic Resource
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