Protein surface concentrations in emulsions stabilized by α-lactalbu-min (α-la), β-lactoglobulin (β-lg) and their mixture were studied with various amounts of oil-soluble surfactant present during homogenization. Three different surfactants were considered: diethyl glycol n-dodecyl ether (C12E2), sorbitan monooleate (Span 80), and glycerol monostearate (GMS). In n-tetradecane-in-water emulsions, low con-centrations of C12 E2or Span 80 resulted in a smaller average droplet size and a greater total protein surface coverage; we found the opposite effect at high surfactant concentrations. The effect of GMS in soybean oil-in-water emulsions was slight. In emulsions containing α-la+β-Ig, separate surface coverages of the whey proteins did not differ significantly. The competitive adsorption of milk proteins in food emulsions is unlikely to be affected by surface-active impurities present in typical food oils.
|Journal||Journal of Food Science|
|Publication status||Published - 1993|
Dickinson, E., Owusu, RK., Tan, S., & Williams, A. (1993). Oil-soluble Surfactants Have Little Effect on Competitive Adsorption of α-Lactalbumin and β-Lactoglobulin in Emulsions. Journal of Food Science, 58(2), 295-298. http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2621.1993.tb04259.x/abstract