30 research outputs found
Isothermal microcalorimetric study of the pH dependence of the interactions between a cellulase and a beta-blocker
No full textThe influence of the pH on the complexation equilibria between (S)- or (R)-alprenolol and the cellulase Cel7A was investigated by isothermal titration calorimetry. The results obtained agree with those of previous, similar studies of the same equilibria in which the protein was immobilized on silica particles, packed in a chromatographic column. The association constant and the complexation enthalpy and entropy of the (S)-enantiomer increase with increasing pH. For (R)-alprenolol, the binding is endothermic at all pH values. Thus, for both enantiomers in the pH range 5.5-6.8, the binding is an entropically driven process
Liquid chromatographic enantioseparation of limonene-based carbocyclic β-amino acids on zwitterionic Cinchona
No full textComparative study on the liquid chromatographic enantioseparation of cyclic beta-amino acids and the related cyclic beta-aminohydroxamic acids on Cinchona alkaloid-based zwitterionic chiral stationary phases
Get PDFComparative study on the liquid chromatographic enantioseparation of cyclic β-amino acids and the related cyclic β-aminohydroxamic acids on Cinchona
No full textUnusual Temperature-Induced Retention Behavior of Constrained β-Amino Acid Enantiomers on the Zwitterionic Chiral Stationary Phases ZWIX(+) and ZWIX(-)
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Thermodynamic origin of the chiral recognition of tryptophan on teicoplanin and teicoplanin aglycone stationary phases
No full textEnantioseparation of phenylalanine analogs on a quinine-based anion-exchanger chiral stationary phase: Structure and temperature effects
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