Fig. 7: TIF for photodynamic sterilization of acidic fruit juices.
From: Halo-fluorescein for photodynamic bacteria inactivation in extremely acidic conditions
a Pictures showing the color change of juices treated with TIF before and after light irradiation; b schematic illustration of using TIF for photodynamic sterilization in juice under visible light irradiation; c bacterial colony number in passionfruit lemon juice (pH = 2.8) treated with TIF-based photodynamic sterilization at different time intervals, with pictures of the bacterial cultures shown inset (bacteria were first treated and then plated on solid media for colony quantification); d comparison of the performances of different sterilization methods for treatment of passionfruit lemon juice; e change of the ascorbic acid concentrations in passionfruit lemon juice before and after photodynamic sterilization; f change of the total phenolic compounds concentrations in passionfruit lemon juice before and after photodynamic sterilization; and g change of the total flavonoid concentrations in passionfruit lemon juice before and after photodynamic sterilization (*P < 0.05, **P < 0.01, ***P < 0.001). Error bars represent standard deviation, n = 3 independent replicates.
