Fig. 10
The size, dispersity index (DI) and optical images of primary emulsion (PE) (a), double emulsion (b), and antibubbles (c), and (d) the concentration of calcein in DE, freeze dried double emulsion (FDDE), and antibubbles during storage. \({W}_{1}\): internal aqueous phase, O: oil phase (intermediate phase in DE), \({W}_{2}\): continuous aqueous phase, and A: air phase (intermediate phase in antibubble). The bars and error bars represent the mean and standard deviation, respectively obtained from triplicate samples, each with at least 100 evaluations. Different small letter alphabets above the error bars indicate significant differences among the sample means (p < 0.05).
