title: The Physical and Linear Viscoelastic Properties of Fresh Wet Foams Based on Egg White Proteins and Selected Hydrocolloids.
abstract: The aim of this work was to evaluate the physicochemical properties of fresh foams based on egg white proteins, xanthan gum and gum Arabic. The distributions of the size of gas bubbles suspended in liquid were determined, as well as density and volume fraction of gas phase of the generated foams. Additionally, the viscoelastic properties in the linear range were measured, and the results were analyzed with the use of the fractional Zener model. It was shown, that foam supplementation with hydrocolloids considerably decreased their volume fraction of gas phase in comparison to pure egg white protein-based foams. Application of gum Arabic did not cause an increase in the size of foam bubbles when compared to pure white egg foam, whereas application of xanthan gum significantly decreased the size of the bubbles. Application of the fractional Zener model allowed to determine the relaxation times, their intensity in analyzed suspensions and also equilibrium module (Ge). The increase in the concentration of xanthan gum resulted in the prolongation of the relaxation time and increased its intensity. Gum Arabic, when added, weakened the viscoelastic properties of the mixture as a viscoelastic solid.
authors.affiliation: Faculty of Food Technology, Department of Engineering and Machinery for Food Industry, Agriculture University in Krakow, ul. Balicka 122, 30-149 Kraków, Poland.
authors.forename: Paweł
authors.initials: P
authors.lastname: Ptaszek
authors.affiliation: Faculty of Food Technology, Department of Engineering and Machinery for Food Industry, Agriculture University in Krakow, ul. Balicka 122, 30-149 Kraków, Poland.
authors.forename: Daniel
authors.initials: D
authors.lastname: Zmudziński
authors.affiliation: Faculty of Food Technology, Department of Engineering and Machinery for Food Industry, Agriculture University in Krakow, ul. Balicka 122, 30-149 Kraków, Poland.
authors.forename: Joanna
authors.initials: J
authors.lastname: Kruk
authors.affiliation: Faculty of Food Technology, Department of Engineering and Machinery for Food Industry, Agriculture University in Krakow, ul. Balicka 122, 30-149 Kraków, Poland.
authors.forename: Kacper
authors.initials: K
authors.lastname: Kaczmarczyk
authors.affiliation: Faculty of Food Technology, Department of Engineering and Machinery for Food Industry, Agriculture University in Krakow, ul. Balicka 122, 30-149 Kraków, Poland.
authors.forename: Wojciech
authors.initials: W
authors.lastname: Rożnowski
authors.affiliation: Faculty of Food Technology, Department of Carbohydrate Technology, Agriculture University in Krakow, ul. Balicka 122, 30-149 Kraków, Poland.
authors.forename: Wiktor
authors.initials: W
authors.lastname: Berski
keywords: Egg white; Foam; Fractional derivatives; Hydrocolloids; Zener model