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. Author manuscript; available in PMC: 2010 May 1.
Published in final edited form as: Biochim Biophys Acta. 2009 Jan 27;1788(5):1033–1043. doi: 10.1016/j.bbamem.2009.01.006

Figure 3.

Figure 3

Fourth cycle compression isotherms of subphases containing albumin and/or chitosan without Survanta. □ 2 mg/mL albumin; ○ 2 mg/mL albumin-0.1 mg/mL chitosan; △ 0.1 mg/mL chitosan. Albumin is surface active while chitosan is not; chitosan addition does not change the albumin isotherm. Compressing the albumin film increases the surface pressure from about 15 mN/m to a maximum of about 30 mN/m; expanding the albumin film shows a similar hysteresis to the Survanta monolayer as the surface pressure rapidly drops to < 20 mN/m and is roughly constant during the expansion. This minimum surface pressure is likely set by adsorption of albumin from solution.