title: The influence of water activity on the stability of vulgaxanthin I.
abstract: The stability of vulgaxanthin I at 100 degrees C is dependant on the water activity of the system. The half-life of vulgaxanthin I was found to be three times greater at aw 0.20 than at 1.00. The rate constants for vulgaxanthin I degradation varied exponentially with respect to water activity and below aw = 0.50 the stability was not improved.
mesh_terms: D004355:Drug Stability; D005505:Food Coloring Agents; D006207:Half-Life; D014867:Water / Q000494:pharmacology*; D014970:Xanthines
chemical_list: D005505:Food Coloring Agents; D014970:Xanthines; D014867:Water