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  • 1
    Electronic Resource
    Electronic Resource
    Enantioselective binding of tryptophan by .alpha.-cyclodextrin (1992)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 114 (1992), S. 1554-1562 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00031a003
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  • 2
    Electronic Resource
    Electronic Resource
    Thermodynamics of amino acid dissociation in mixed solvents. 3: Glycine in aqueous glucose solutions from 5 to 45°C (1992)
    Springer
    Journal of solution chemistry 21 (1992), S. 1131-1143 
    Details
    ISSN: 1572-8927
    Keywords: Dissociation constant ; ionization ; transfer free energy ; Pitzer's equation ; glycine ; glucose-water mixed sovent ; emf
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The first thermodynamic dissociation constants of glycine in 5, 15 mass % glucose+water mixed solvents at five temperatures from 5 to 45°C have been determined from precise emf measrements of a cell without liquid junction using hydrogen and Ag-AgCl electrodes and a new method of polynomial approximation proposed on the basis of Pitzer's electrolytic solution theory in our previous paper. The results obtained from both methods agree within experimental error. The standard free energy of transfer for HCl from water to aqueous mixed solvent have been calculated and the results are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00651859
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  • 3
    Electronic Resource
    Electronic Resource
    Dynamic response of a rigid plastic simply supported imperfect beam subjected to a uniform intense dynamic loading (1991)
    Springer
    Acta mechanica solida Sinica 4 (1991), S. 15-32 
    Details
    ISSN: 0894-9166
    Keywords: simply supported beam ; imperfection ; intense dynamic loading ; rigid plasticity ; complete solutions ; distribution of dissipated energy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract This paper proposes a theoretical analysis for the dynamic response of a rigid perfectly plastic simply supported beam with an imperfection in the midspan cross-section under uniform step, pulse, and impulsive loading when support is assumed to be free to move inward. The complete solutions for an entire dynamic response process are given and the relationship between the distribution of energy dissipated at plastic hinges and the parameter of imperfection is also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02208107
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  • 4
    Electronic Resource
    Electronic Resource
    Structural characteristics of cyclodextrins in the solid state (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Chirality 4 (1992), S. 205-215 
    Details
    ISSN: 0899-0042
    Keywords: cyclodextrins ; molecular mechanics ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A comparison of α-, β and γ-cyclodextrins in the solid state is made. Monomeric features analyzed include orientations of primary hydroxyl groups and pyran ring pucker. Macromolecular features examined include planarity of the oligomer, tilting of pyran rings, and, deviation from Cn symmetry where n = number of monomers. The mean values and standard deviations of these shape descriptors are given for cyclodextrins with and without guests embedded in their interiors. Molecular mechanics calculations using the MM2, AMBER, and CHARMM force fields show that most solid state cyclodextrins are trapped in high-energy conformations relative to the most stable forms found in this study. © 1992 Wiley-Liss, Inc.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/chir.530040402
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  • 5
    Electronic Resource
    Electronic Resource
    Theoretical study of enantiodifferentiation in solid state cyclodextrins (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Chirality 5 (1993), S. 51-57 
    Details
    ISSN: 0899-0042
    Keywords: molecular mechanic ; guest-host cyclodextrin complexes ; enantiodiscriminating forces ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A molecular mechanics investigation of R- vs. S-phenylethanol, R- vs. S-mandelic acid, R- vs. S-flurbiprofen, and R- vs. S-fenoprofen in their cyclodextrin crystal environments was undertaken. It was found that the dominant force responsible for guesthost complexation is the short-range London force; the enantiodiscriminating forces tend to be very small and are generally, but not always, dominated by long-range electrostatic contributions. Derivatized cyclodextrins are generally more enantiodiscriminating than native cyclodextrins, perhaps due to exterior rather than interior guest-host binding. © 1993 Wiley-Liss, Inc.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/chir.530050202
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