Biomedical Engineering Reference
In-Depth Information
Figure 3. Surface tension isothermes for MR at 25
O
C and times incubation: 2 and 24 hours.
Figure 4. Surface tension isotherms for MR alone and in mixed solution with lysozyme at constant
lysozyme concentration (3.4 10
-6
M) at 25
O
C.
At steady -state a constant fraction of surfactant molecules stays at the interface and so an
area per molecule can be calculated from the adsorption density at the air/water interface
according [Dash, Misra, 2011].
The surface tension data are fitted to the Gibbs adsorption equation to calculate the
amount of surfactant adsorbed per unit area of air/water interface. The Gibbs adsorption
equation [30] may be written as:
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