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- W2093962836 endingPage "1998" @default.
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- W2093962836 abstract "Chlorophyll degradation in blanched freeze-dried spinach puree was studied in model systems as a function of water activity (aw), pH, temperature and also in the presence of glycerol, a water-binding agent. For aw > 0.32 the most important mechanism of chlorophyll degradation is the transformation into pheophytin. The reaction can occur at very limited water concentration and has a first order dependence on pH, water activity and pigment concentration. The addition of glycerol increases the rate of degradation of chlorophyll. At temperatures higher than 56.7°C and aw= 0.11, the energy of activation increased, indicating different mechanisms. For temperatures below 38°C the rate tended to increase instead of decreasing with decreasing temperatures because of changes in the sorption isotherm (increase of water content) caused by the shift in the temperature." @default.
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- W2093962836 date "1982-11-01" @default.
- W2093962836 modified "2023-10-18" @default.
- W2093962836 title "Chlorophyll Degradation in a Spinach System at Low and Intermediate Water Activities" @default.
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- W2093962836 doi "https://doi.org/10.1111/j.1365-2621.1982.tb12929.x" @default.
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