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  • 1
    Digitale Medien
    Digitale Medien
    On the conformations of poly-N-methyl-L-alanine (PNMA) in solution (1971)
    New York : Wiley-Blackwell
    Biopolymers 10 (1971), S. 2581-2590 
    Details
    ISSN: 0006-3525
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: High-resolution nuclear magnetic resonance spectra at 100 MHz have been obtained on poly-N-methyl-L-alanine in the chloroform-trifluoroacetic acid system under various conditions of solvent composition. Different spectra are observed for the CH3-Cα, Cα-H, and N-CH3 protons. On the basis of conformational analysis an interpretation of the NMR results was attempted.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bip.360101217
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  • 2
    Digitale Medien
    Digitale Medien
    Eine Molekulargewichtsbestimmung vom Papierchromatogramm (1953)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 65 (1953), S. 319-320 
    Details
    ISSN: 0044-8249
    Schlagwort(e): Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/ange.19530651205
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  • 3
    Digitale Medien
    Digitale Medien
    Nmr studies of poly-γ-benzyl-L-glutamate in trifluoroacetic/deuterochloroform solutions: Temperature dependence (1974)
    New York : Wiley-Blackwell
    Biopolymers 13 (1974), S. 745-751 
    Details
    ISSN: 0006-3525
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The helix-random-coil transition process for poly-γ-benzyl-L-glutamate (PBG) in solvent mixtures trifluoroacetic acid/deuterochloroform (TFA/CDCl3) at different temperatures has been studied by nmr. The chemical shift behavior of the α-CH resonances of the peptide chain and of the TFA carboxylic protons is reported.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bip.1974.360130409
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  • 4
    Digitale Medien
    Digitale Medien
    Die Bestimmung der Energiebarriere für die gehinderte interne Rotation in N, N-Dimethylformamid durch Protonenresonanz-Spektroskopie (1967)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 50 (1967), S. 603-607 
    Details
    ISSN: 0018-019X
    Schlagwort(e): Chemistry ; Organic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: A re-determination of the energy barrier for the internal rotation of N, N-dimethylformamide has been carried out by proton magnetic resonance under refined experimental conditions. Consistent data have been obtained for ΔE, ΔG≠, and v0 from different experiments utilizing 60 Mc/s and 100 Mc/s spectrometers including homonuclear double resonance and the use of deuterium substitution. The results are compared with the range of values previously reported in the literature.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/hlca.19670500225
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  • 5
    Digitale Medien
    Digitale Medien
    NMR studies of viomycinWork supported in part by the Consiglio Nazionale delle Ricerche. (1972)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 4 (1972), S. 237-246 
    Details
    ISSN: 0030-4921
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The 1H and 13C NMR spectra of antibiotic Viomycin sulphate and its constituent aminoacids in H2O and D2O were examined in a wide range of pH values. The spectra were analysed by proton spin-spin decoupling experiments and measurements of the relative intensities of the resonance and chemical shift values. Exchange experiments were also carried out and an almost complete assignment of the resonances of the spectra was possible. The data obtained are discussed in terms of possible structures for Viomycin and the presence of intramolecular hydrogen bonds. Some information about the conformation of the molecule is also given. A tentative assignment of the 13C spectrum of Viomycin is given and the experimental 13C chemical shift values compare well with the theoretical ones evaluated by Grant's rule.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/mrc.1270040205
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  • 6
    Digitale Medien
    Digitale Medien
    Nuclear magnetic resonance studies on dipeptides (1970)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 2 (1970), S. 131-139 
    Details
    ISSN: 0030-4921
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Dipeptides of different amino acids have been studied by NMR in aqueous solutions at different pH values. The results obtained are discussed in terms of the different contributions to the chemical shift of the α-CH protons.
    Zusätzliches Material: 5 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/mrc.1270020206
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  • 7
    Digitale Medien
    Digitale Medien
    Drug - membrane interactions: Silymarin, silibyn and microsomal membranes (1984)
    New York, NY [u.a.] : Wiley-Blackwell
    Cell Biochemistry and Function 2 (1984), S. 85-88 
    Details
    ISSN: 0263-6484
    Schlagwort(e): Liver ; biomembranes ; liver microsome ; fluorescence ; 5′-nucleotidase ; silymarin ; silybin ; Chemistry ; Biochemistry and Biotechnology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie , Medizin
    Notizen: Silymarin and silibyn are extracted from the seeds of Silybum marianum and used as a liver protectant because of their free radical scavenging. When incorporated into rabbit liver microsomes they cause a small decrease in the flourescence anisotropy of 1,6-diphenyl-1,3,5-hexatrine (DPH) but not of 1-anilinononaphthalene-8-sulphonic acid (ANS), incorporated into the membranes. They do, however, reduce the fluorescence intensity of incorporated ANS without changing the wavelength of maximum intensity. These observations suggest that the drugs are incorporated into the hydrophobic-hydrophilic interface of the microsomal bilayer and perturb the structure by influencing the packing of the acyl chains.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/cbf.290020206
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