Volume 8
Issue 2
Food Science and Technology
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES
Available Online: http://www.ejpau.media.pl/volume8/issue2/abs-33.html
APPLICATION OF DYNAMIC RHEOLOGY METHODS TO DESCRIBING VISCOELASTIC PROPERTIES OF WHEAT GLUTEN
Anna Pruska-Kędzior, Zenon Kędzior, Elżbieta Bera, Katarzyna Hryciuk, Justyna Golińska-Krysztofiak
Institute of Food Technology,
The August Cieszkowski Agricultural University, Poznań, Poland
ABSTRACT
Viscoelastic properties of gluten obtained from two Polish cultivars of wheat of contrasted technological value (`Begra´ and `Wilga´) were studied by applying dynamic oscillatory rheometry. Mechanical spectra of gluten were registered in frequency window 0.001 - 200 rad/s and analysed using Cole-Cole functions to obtain quantitative characteristics of viscoelastic properties in terms of JN0 (compliance of elastic plateau), the inverse of compliance equals to the network elasticity modulus GN0, w0 (central frequency of loss peak) and n (parameter related to broadness of loss peak). Differences in protein fractional composition appearing between individual studied samples are reflected in viscoelastic properties of wheat gluten and are related to weather conditions existing within respective wheat vegetation periods. Cole-Cole equations appeared suitable for obtaining concise quantitative rheological description of wheat gluten viscoelastic properties.
Key words: wheat, gluten, linear viscoelasticity, dynamic rheology measurements, Cole-Cole fit.
Anna Pruska-Kędzior
Institute of Food Technology,
The August Cieszkowski Agricultural University, Poznań, Poland
Wojska Polskiego 31, 60-624 Poznań, Poland
email: kedziorm@au.poznan.pl
Zenon Kędzior
Institute of Food Technology,
The August Cieszkowski Agricultural University, Poznań, Poland
Wojska Polskiego 31, 60-624 Poznań, Poland
Elżbieta Bera
Institute of Food Technology,
The August Cieszkowski Agricultural University, Poznań, Poland
Wojska Polskiego 31, 60-624 Poznań, Poland
Katarzyna Hryciuk
Institute of Food Technology,
The August Cieszkowski Agricultural University, Poznań, Poland
Wojska Polskiego 31, 60-624 Poznań, Poland
Justyna Golińska-Krysztofiak
Institute of Food Technology,
The August Cieszkowski Agricultural University, Poznań, Poland
Wojska Polskiego 31, 60-624 Poznań, Poland
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