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- W3028593088 abstract "The potential of Cys-Cys ligands for the development of a novel type of S-protected thiomers was evaluated. S-protected thiomers chitosan-N-acetylcysteine-mercaptonicotinamide (CS-NAC-MNA) and chitosan-N-acetylcysteine-N-acetylcysteine (CS-NAC-NAC) were synthesized and characterized. Viscosity of polymers in presence of various concentrations of S-amino acids was monitored. Mucoadhesive properties were evaluated. FT-IR characterization confirmed the covalent attachment of NAC-MNA and NAC-NAC. Attached sulfhydryl groups were found in the range of 550 μmol/g. In the presence of amino acids bearing a free thiol group viscosity of both polymers increased. This increase in viscosity depended on the amount of added free thiols. Maximum force required to detach CS-NAC-MNA and CS-NAC-NAC from porcine intestinal mucosa was 1.4- and 2.7-fold higher than that required for chitosan, respectively. CS-NAC-MNA adhered up to 3 h, whereas CS-NAC-NAC adhered even for 8 h on this mucosa. Accordingly, the Cys-Cys substructure could be identified as highly potent ligand for the design of mucoadhesive polymers." @default.
- W3028593088 created "2020-05-29" @default.
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- W3028593088 date "2020-08-01" @default.
- W3028593088 modified "2023-10-15" @default.
- W3028593088 title "Thiolated chitosans: Are Cys-Cys ligands key to the next generation?" @default.
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- W3028593088 doi "https://doi.org/10.1016/j.carbpol.2020.116395" @default.
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