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  • 1
    Electronic Resource
    Electronic Resource
    ESR analysis of the complexing equilibria of Mn(II) with nucleo bases in solution (1986)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 24 (1986), S. 601-606 
    Details
    ISSN: 0749-1581
    Keywords: Manganese(II) ion-biomolecule complexes ; Metal nucleo base interaction ; Mn(II) Solution ESR ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The X-band ESR spectra of manganese(II) complexes with nucleobase constituents such as pyridine, imidazole and purine have been analysed at various metal to ligand molar ratios and pH values. Mixed complexing Mn(II)—H2O—N base, together with the direct N base coordination of the metal ion, have been characterized on the basis of the ESR parameters a, ΔH, intensity and line shape. The ESR evidence for a direct interaction of pyridine and imidazole with Mn(II) is reported.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260240708
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  • 2
    Electronic Resource
    Electronic Resource
    Conformational and dynamic investigation in solution of inosine and its molecular complex, inosiplex, by proton and carbon NMR spectroscopy (1990)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 28 (1990), S. 348-354 
    Details
    ISSN: 0749-1581
    Keywords: Proton selective relaxation ; Conformational analysis ; Molecular motion and dynamics ; 13C NMR spin-lattice relaxation ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The conformational and dynamic properties of inosine and two other components of inosiplex (p-acetamidobenzoic acid and dimethylaminoisopropanol) were analysed. For inosine, the most interesting molecule of the complex, the rotamer populations of all six allowed structures related to the N ⇌ S puckering and the 5′-exocyclic conformation were calculated. Analysis of different NMR spectra and/or parameters, i.e. 2D-NOE, saturation transfer, spinlattice relaxation rates and scalar coupling constants, suggests that a distribution of several inosine structures occurs in solution, with the inosine syn conformation predominating.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260280413
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  • 3
    Electronic Resource
    Electronic Resource
    Proton and carbon chemical shift assignment and dynamic investigation of the macrolide antibiotic tylosin (1992)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 30 (1992), S. 954-957 
    Details
    ISSN: 0749-1581
    Keywords: Tylosin ; Antiobiotic ; Dynamic properties ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The NMR spectral properties of the antibiotic tylosin were investigated. DQ-COSY and HETCOR two-dimensional spectra were used for the assignment of both the proton and protonated carbon signals. Selective (H)C-NOE, were proposed for the controversial quaternary carbon assignments. The analysis of molecular motion in solution based on carbon spin-lattice relaxation rates shows that tylosin exhibits dynamics that are typical of each molecular moiety. A higher degree of free motion is observed with increasing distance from the macrolide nucleus.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260301007
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  • 4
    Electronic Resource
    Electronic Resource
    Nuclear magnetic resonance study of gentiobiose octaacetate in solution (1989)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 27 (1989), S. 223-226 
    Details
    ISSN: 0749-1581
    Keywords: Oligosaccharides ; Conformations ; Gentiobiose octaacetate ; Nuclear magnetic relaxation ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Gentiobiose octaacetate, a disaccharide molecule, was investigated in order to define (i) the proton and carbon assignments and chemical shift values, (ii) the carbon relaxation behaviour in DMSO solution and (iii) the dynamic properties of the molecule. It was found that in solution it behaves like a rigid molecule characterized by an unique isotropic correlation time. Scalar coupling constant analysis allowed the identification of the H-6 axial and H-6 equatorial protons for both sugar ring moieties.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260270305
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