Non-dehydrated capsules A measurement of the ratio of fluorescein (ex. 495 nm, em. 505 -525 nm) / Nile Red (ex. 561 nm, em. 570 -590 nm) fluorescence (normalization of fluorescein signal against number of capsules, using the same pelleted capsules with their respective supernatant) was performed after 10 min on a Tecan Spark microplate reader. A scheme of the protocol is shown in Figure .