Figure 7From: Preparation and characterization of nano liposomes of Orthosiphon stamineusethanolic extract in soybean phospholipidsDose dependent quenching of pyrene fluorescence in OS liposomes. Addition of pyrene to aqueous solution containing OS liposomes caused substantial quenching of pyrene’s fluorescence in a dose dependent manner (A); increasing liposomes concentration caused a redshift in emission intensity and increased the I384/I375 intensity ratio (B). The critical micellar concentration (CMC) is estimated from graph B and was found to be 9.2 ± 2.9 μg/ml.Back to article page