Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Essential oil extraction methods: (a) cold pressing, (b) hydrodistillation, (c) steam distillation, (d) microwave-assisted hydrodistillation, (e) microwave-assisted steam hydrodistillation, and (f) ohmic heating-assisted hydrodistillation (adapted from Golmakani [19] and Hatami et al. [20]).
