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  • Chemistry  (4)
  • 2020-2022
  • 1980-1984  (4)
  • 1920-1924
  • 1981  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Strategy for the synthesis of large peptides: An application to the total synthesis of human parathyroid hormone [hPTH(1-84)] (1981)
    New York : Wiley-Blackwell
    Biopolymers 20 (1981), S. 1823-1832 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A strategy suitable for the synthesis of larger peptides is proposed. It involves the following four considerations: (1) all of the side-chain functional groups are protected by benzyl-type protective groups; (2) a water-soluble carbodiimide, 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide, is used for the fragment-condensation reactions together with 1-hydroxybenzotriazole as the additive; (3) all the protective groups are cleaved simultaneously by the HF method in the final stage of the synthesis; and (4) side products formed are detected and removed by an efficient high-performance liquid chromatography procedure. The usefulness of these procedures is demonstrated taking the synthesis of human parathyroid hormone [hPTH(1-84)] as an example.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1981.360200907
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  • 2
    Electronic Resource
    Electronic Resource
    Cation-binding ability of tactic poly(crown ether)s (1981)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 182 (1981), S. 1579-1586 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Cation-binding ability of tactic poly(crown ether)s was evaluated by solvent extraction of alkali metal picrates. It was found that isotactic poly(crown ether)s bind particular cations, which can be easily sandwiched by two neighboring crown ether units, a little more effectively than syndiotactic ones. No difference of cation-binding ability was, however, observed between the corresponding d,l- and meso-bis(crown ether)s. This suggests that the rigidity of the poly(crown ether)s, in combination with the tactic configurations, causes the difference in the cation-binding ability.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1981.021820528
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  • 3
    Electronic Resource
    Electronic Resource
    Binding of fluorescent probes to poly(vinylbenzo-18-crown-6) (1981)
    Basel : Wiley-Blackwell
    Die Makromolekulare Chemie, Rapid Communications 2 (1981), S. 235-240 
    Details
    ISSN: 0173-2803
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/marc.1981.030020307
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  • 4
    Electronic Resource
    Electronic Resource
    The Raman band shape and vibrational relaxation of the ν1 mode of SO42- in Na2SO4 and (NH4)2SO4 aqueous solutions (1981)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 11 (1981), S. 108-111 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The Raman band of the ν1 vibrational mode of SO42- has been measured in aqueous solutions of Na2SO4 and (NH4)2SO4 at 5-80°C, and analysed from the stochastic point of view. The band shape is approximately symmetric, but cannot be reproduced by a Lorentzian curve. The vibrational relaxation is caused by a random modulation of very low frequency from surrounding water. The vibrational correlation time for the ions is not sufficiently long to make allowance for the Markovian process of relaxation, compared with the correlation time for the bath, that is water. The vibrational correlation function appropriate for these ions is proposed.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250110210
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