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  • 1
    Electronic Resource
    Electronic Resource
    Supramolekulare Phosphoryl-Übertragungsreaktionen, vermittelt durch Amidinium-Phosphat-Ionenpaarkomplexe (1994)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1994 (1994), S. 1075-1092 
    Details
    ISSN: 0170-2041
    Keywords: Artificial phosphodiesterase ; Naphthalene, 1,8-disubstituted ; Molecular Recognition ; Staphylococcal nuclease, model of ; Enzymes ; Amidinium phosphate ; Ion-Pair Complexes ; Guanidine ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Supramolecular Phosphoryl Transfer Reactions Mediated by Amidinium Phosphate Ion-Pair ComplexesIn order to build up simplified synthetic models of staphylococcal nuclease two derivatives of 8-phenylnaphthalene-1-carboxamidine equipped with nucleophilic side chains have been prepared (1,2). After protonation these amidinium alcohols bind phosphodiester anions via hydrogen bonds and react within the ion-pair complexes to give zwitterionic products 27 and 28. The rate accelerations (DMF, 30°C) compared to the phosphorylation of noncharged alcohols are 2700-fold (2) and 930-fold (1).
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.199419941106
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    Paper (German National Licenses)
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  • 2
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    The Bouquet of Features in Rolling Stock Rotation Planning (2023)
    Details
    Publication Date: 2024-02-08
    Description: Rolling stock is one of the major assets for a railway transportation company. Hence, their utilization should be as efficiently and effectively as possible. Railway undertakings are facing rolling stock scheduling challenges in different forms - from rather idealized weekly strategic problems to very concrete operational ones. Thus, a vast of optimization models with different features and objectives exist. Thorlacius et al. (2015) provides a comprehensive and valuable collection on technical requirements, models, and methods considered in the scientific literature. We contribute with an update including recent works. The main focus of the paper is to present a classification and elaboration of the major features which our solver R-OPT is able to handle. Moreover, the basic optimization model and algorithmic ingredients of R-OPT are discussed. Finally, we present computational results for a cargo application at SBB CARGO AG and other railway undertakings for passenger traffic in Europe to show the capabilities of R-OPT.
    Language: English
    Type: other , doc-type:Other
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    OPUS
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