3. Results and discussion
3.1. Effect of PGPR concentration on droplet break-up
The influence of PGPR concentration was tested by making a series of water-in-oil emulsions with between 0.1 and 9 wt.% PGPR in the oil phase, and with 2 wt.% calcium chloride dissolved in the aqueous phase. Calcium chloride was used because it has been shown to reduce the droplet size with PGPR (Márquez et al.,