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.,