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  • 1
    Electronic Resource
    Electronic Resource
    Artificial hydrolase using modified dimethyl-β-cyclodextrin (1989)
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 7 (1989), S. 117-124 
    Details
    ISSN: 1573-1111
    Keywords: Cyclodextrin ; artificial enzyme ; dimethyl-β-cyclodextrin ; chymotrypsin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The first successful method for modification of dimethyl-β-cyclodextrin (β-DMCD) was demonstrated by the synthesis of a new artificial hydrolase (2) and the enzymatic activities of 2 were investigated.2 caused an 1100-fold increase in the rate of hydrolysis ofp-nitrophenyl acetate at pH 7.2, whereas unmodifiedβ-DMCD depressed the reaction. The kinetic pK a of2 was 7.2, and theK m of2 was independent of pH values.2 hadpara-selectivity for the hydrolysis of nitrophenyl acetate isomers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01112789
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The conformational and binding properties of ethylbipyridinio-modifiedβ-Cyclodextrin using induced circular dichroism (1991)
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 10 (1991), S. 443-451 
    Details
    ISSN: 1573-1111
    Keywords: Cyclodextrin ; ethyl viologen ; binding ability ; conformation ; steroidal guest ; complex
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The conformational and binding properties of mono-6-deoxy-6[4-(1-ethyl-4-pyridinio)-1-pyridinio]-β-cyclodextrin (1) in complex formation with some guest compounds were examined by induced circular dichroism (ICD) spectra in aqueous solution. Compound 1 showed much stronger binding ability for some guest compounds (1: 1 complexes), compared withβ-cyclodextrin (β-CDx) and a positively charged β-CDx [C-6-mono-pyridino-β-CDx (2)]. Marked conformational changes of1 (the spatial position of the ethyl viologen (C2V2+) group relative to the cavity in 1) were observed upon complex formation with some guests like 1-adamantanecarboxylic acid (ACA) and sodium cholate (SC).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01061075
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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