Foam behavior of biological media
I. Protein foams
Biotechnology
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Summary
The foaminess and the time dependence of the surface tension σ of aqueous bovine serum albumin, bacterium protease and amyloglucosidase solutions were estimated and the time tDG necessary for them to attain their equilibrium surface tensions was determined. The foaminess could be described as a simple function of tDG. The time dependence of σ could be evaluated by Eq. (1) The constant n of Eq. (1) is dependent on the protein concentration as well as on b. The foaminess can also be described as a simple function of n and/or nob.
$$\begin{gathered}{\text{ }}1{\text{n [1/(1 - y)] = b t}}^{\text{n}} \hfill \\{\text{where y = (}}\sigma _{\text{O}} {\text{ - }}\sigma _{{\text{s,t}}} {\text{)/(}}\sigma _{\text{O}} {\text{ - }}\sigma _{{\text{s,}}\infty } {\text{),}} \hfill \\{\text{ }}\sigma _{\text{O}} {\text{ = surface tension of pure solvent}} \hfill \\{\text{ }}\sigma _{{\text{s,t}}} {\text{ = surface tension of protein solution at time t}} \hfill \\{\text{ }}\sigma _{{\text{s,}}\infty } {\text{ = equilibrium surface tension of solution}}{\text{. }} \hfill \\\end{gathered}$$
(1)
Keywords
Albumin Foam Bovine Serum Bovine Serum Albumin Surface Tension
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
Symbols
- b
constant in Eq. (4)
- C
concentration of the protein
- n
constant in Eq. (4)
- T
temperature
- t
time (measured from the beginning of the determination of the surface tension σ)
- tDG
time, necessary to attain the equilibrium surface tension σequil
- V
(σO − σs,∞)/(σs,t − σs,∞)
- Vs
equilibrium volume of the foam
- Vtg
volumetric gas flow rate during the estimation of Σ
- Σ
foaminess
- σ
surface tension
- AMG
amyloglucosidase
- BP
bacterium protease
- BSA
bovine serum albumin
- CMC
critical micelle concentration
- mN/n
milli Newton meter−1
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