Physicochemical studies on wheat protein foams

A Kinetic Model to Describe Liquid Drainage from Soy Protein Foams over an Extensive Protein Concentration Range

“…Equation [2] fitted the experimental data very well (R 2 ranged from 0.997 to 0.999, P < 0.01). The comparison between experimental and predicted curves is shown in Fig.…”

“…A good agreement between predicted and experimental values could be observed. Rate of liquid drainage was derived by differentiating Eqn [2] with respect to time:…”

“…Rate constants or drainage half-time have been frequently used to measure the stability of foams. Several empirical equations, including first and second-order equations, have been used to describe experimental drainage profiles (2,(7)(8)(9). Elizalde et al (10) proposed a kinetic model of secondorder with respect to the amount of liquid remaining in the foam to express serum drainage of 14 proteinstabilized foams.…”

“…Finally, rupture of the film at the air -foam interface leads to a decrease of the foam column. Although liquid drainage is only one of the factors responsible for foam breakage, it has received most theoretical treatment (2)(3)(4)(5)(6). Rate constants or drainage half-time have been frequently used to measure the stability of foams.…”

Foam Fractionation of Binary Mixtures of Lysozyme and Albumin

“…Others have found that elevated ionic strength enhanced foam drainage by shielding the electrical repulsion of opposing interfaces of adjacent bubbles that resist thinning of the plateau borders. 37 Norde and Lyklema showed that the extent of BSA adsorption on solid surfaces was maximal near the pI ,where the protein was folded into its most compacted state. 26 They also observed that the ionic strength had no effect on extent of adsorption at the pI, but became significant at pH values both above and below the pI.…”