“…We have decided to use membrane osmometry because of its direct measurement of the osmotic pressure, and because the measured values are number-averaged and therefore insensitive to sample impurities, like dust. In our previous work on this topic we have determined the molecular weight and molecular interactions for a variety of proteins and crude protein mixtures (Ersch, Meijvogel, van der Linden, Martin, & Venema, 2015). These results were used to estimate the strength of the adhesive interactions between b-lactoglobulin molecules, which turned out to be well-described as adhesive hard spheres.…”