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  • 1
    Electronic Resource
    Electronic Resource
    Long- and short-range ordering in LiTbS2 (1978)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 34 (1978), S. 250-253 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Electron-microscope studies have been performed on single crystals of LiTbS2. Samples cooled from 1000°C show diffuse intensity bands in the diffraction patterns, arising from short-range ordering of Li and Tb. After annealing at 500°C, the ordering range increases and three superstructures are observed. On the basis of the observed diffraction patterns and bright and dark-field images the range and the nature of the ordering is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739478000479
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The crystal structure of KCeS2 (1976)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 32 (1976), S. 1856-1858 
    Details
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567740876006523
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Specific cation effect in the reaction of nitroprusside with cysteine, acetophenone and sulfite (Legal and boedeker reaction) (1984)
    Springer
    Pharmacy world & science 6 (1984), S. 195-202 
    Details
    ISSN: 1573-739X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The colour formation of cysteine (I), acetophenone (II) and sulfite (III) with the sodium and tetrabutylammonium (TBA) salt of nitroprusside (NP2−) in aqueous solution was studied. The intensity of colour formation depends strongly on the nature and concentration of the cations and increases in the order TBA〈Li〈Na〈K〈Rb〈Cs (in case of cysteine TBA and Li are interchanged). This specific cation effect was known for the Boedeker reaction (III) and is now also demonstrated for the Legal reaction (I and II). The adduct formation between NP2− and I to III is based on an anion-anion interaction. The role of the cation is to reduce the Coulombic repulsion between the reactants by ion-pair formation. The efficiency of ion-pair formation corresponds with the order given before except for TBA, which behaves divergently.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01999942
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Complex stability of ferrous ascorbate in aqueous solution and its significance for iron absorption (1984)
    Springer
    Pharmacy world & science 6 (1984), S. 245-248 
    Details
    ISSN: 1573-739X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The greater absorption of ironin vivo from ferrous ascorbate [Fe(HL)2] as compared with ferrous sulfate has been ascribed both to retardation or prevention of Fe(II) oxidation by ascorbate and to the existence of Fe(II) as a chelate with ascorbate. The available literature and our own results demonstrate that Fe(HL)2 dissociates in aqueous solution into a monomeric cationic species Fe(HL)1 +, Fe2+ and HL−. The HL anion acts as a monodentate. The low stability constant KFc(HL)., about 20 l.mol-s-1 at Μ = 0 and 25
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01954553
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    Paper (German National Licenses)
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