FOAM BEHAVIOR OF BIOLOGICAL MEDIA .5. ALCOHOL EFFECTS

The influence of the alcohol concentration on the foaminess, Σ, of-BSA-solutions is considered. This effect is calculated by means of the function Σ (CBSA . f), where f=1 for pure protein solutions and f>1 for alcohol solutions. f is calculated by f = 2ΔTTeff. Here, {Mathematical expression} where ΔTT is the turbidity temperature change due to solvent structure effects and ΔTD, the temperature correction due to alcohol-protein interaction. The constants necessary to calculate ΔTT and ΔTD are tabulated. The agreement between the calculated and measured foaminess Σ, as a function of the n-propanol concentration is satisfactory and for methanol or ethanol excellent. © 1979 Springer-Verlag.