Reversible self-aggregation of oxidized tannins in model solutions
Résumé
MAIN CONCLUSION Oxidized polyphenols aggregate and form reversible hazes. Aggregation / dissolution processes in model solution are monitored by DLS in two sets of experiments: 1) temperature ramp and 2) variation of ethanol fraction. The reversible haze appears to be composed of two fractions with well distinguished haze intensities. LC-MS analysis after phloroglucinolysis reveals that aggregates are mostly composed of oxidized procyanidins with intra-molecular oxidative bonds.
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