Thermal denaturation of whey proteins and its effect in dairy technology

Controlling heat induced aggregation of whey proteins by casein inclusion in concentrated protein dispersions

“…Depending on pH and protein concentrations above a critical threshold, the viscosity would initially increase linearly with the proportion of denatured proteins, followed by an exponential viscosity rise as the protein denaturation progresses further (Kessler & Beyer, 1991). This type of behaviour was also noted in our study for dispersions with low casein content (Fig.…”

“…Increase of viscosity in WP containing systems coincides with increase of protein denaturation (Kessler & Beyer, 1991). Depending on pH and protein concentrations above a critical threshold, the viscosity would initially increase linearly with the proportion of denatured proteins, followed by an exponential viscosity rise as the protein denaturation progresses further (Kessler & Beyer, 1991).…”

Effect of pH on the viscosity of heated reconstituted skim milk

“…The heat treatment of milk at temperatures above about 70 C results in the denaturation of the whey proteins (Hillier & Lyster, 1979;Dannenberg & Kessler, 1988;Kessler & Beyer, 1991;Anema & McKenna, 1996;Bikker, Anema, Li, & Hill, 2000). Once denatured, the whey proteins can undergo a complex series of aggregation reactions with other denatured whey proteins and with the casein micelles (Sawyer, 1969;Mulvihill & Donovan, 1987;Hill, 1989;Jang & Swaisgood, 1990;Corredig & Dalgleish, 1996a,b, 1999Oldfield, Singh, & Taylor, 1998;Oldfield, Singh, Taylor, & Pearce, 2000;Anema & Li, 2003a,b).…”

The Comparative Heat Stability of Bovine β-Lactoglobulin in Buffer and Complex Media

“…To better understand and control heat treatments and their desirable or unwanted e †ects, whey protein denaturation behaviour should be better studied (Kessler 1989 ;Kessler and Beyer 1991). Quantitative information on the thermal denaturation of individual whey proteins can be provided by studies of the reaction kinetics for denaturation.…”