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• W2055079583 abstract "A polymer analogous synthesis involving the reductive amination of phosphorylcholine (PC)−glyceraldehyde with primary amines of deacetylated chitosan (Mw ≈ 57000 g mol-1) was used to prepare phosphorylcholine-substituted chitosans (PC−CH) with a degree of substitution (DS) ranging from ∼11 to ∼53 mol % PC-substituted glucosamine residues. The PC−CH derivatives were characterized by 1H NMR spectroscopy, FTIR spectroscopy, and multiangle laser light scattering gel permeation chromatography (MALLS-GPC). The pKa of the PC-substituted amine groups (pKa ≈ 7.20) was determined by 1H NMR titration. The PC−CH samples (1.0 g L-1) were shown to be nontoxic using an MTT assay performed with human KB cells. Aqueous solutions of PC−CH samples (4.0 g L-1) of DS ≥ 22 mol % PC-substituted glucosamine residues remained clear, independently of pH (4.0 < pH < 11.0). The remarkable water solubility and nontoxicity displayed by the new PC−CH samples open up new opportunities in the design of chitosan-based biomaterials and nanoparticles." @default.
• W2055079583 created "2016-06-24" @default.
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• W2055079583 date "2006-10-03" @default.
• W2055079583 modified "2023-10-01" @default.
• W2055079583 title "Synthesis and Characterization of Phosphorylcholine-Substituted Chitosans Soluble in Physiological pH Conditions" @default.
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• W2055079583 doi "https://doi.org/10.1021/bm060381u" @default.
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