Skip to main content
. Author manuscript; available in PMC: 2009 Apr 13.
Published in final edited form as: Anesth Analg. 2008 Sep;107(3):868–874. doi: 10.1213/ane.0b013e31817ee500

Fig 1.

Fig 1

Structure of surfactants. Surfactants are amphiphilic compounds, with a hydrophilic head group and a hydrophobic tail. In this study, uncharged, anionic, cationic, and zwitterionic surfactants with the designated head groups were used. Surfactants had either eight or twelve carbon tails.