were quantified over incubation (Figures &), and the decrease in red fluorescence emission of BODIPY 665/676 was measured with CLSM (Figure ). In the monodisperse emulsion stabilized by WPI, the concentration of lipid hydroperoxides and aldehydes increased slightly over the first four days and more rapidly between four and six days of incubation (Figures 3a &b). Similar effects were seen in the fluorescence intensity, which showed a minor decrease of red fluorescence in the first two days followed by a more rapid decrease between four and six days (Figure ). The decrease of red fluorescence was accompanied by the appearance of green fluorescence (excitation at 561 nm), confirming that the BODIPY 665/676 dye was getting oxidized (Figure ).