OEO	oregano essential oil
NSD	nano spray drying
WPI	whey protein isolate
MD	maltodextrin
EO	essential oil
DE	dextrose equivalent
PDI	polydispersity index
TO	total oil content
SO	surface oil content
OR	oil retention
EE	encapsulation efficiency
SMP	skim milk powder
MSD	conventional/mini spray drying
MS	modified starch
GA	gum Arabic