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- Title
The influence of moisture content on the rheological properties of processed cheese spreads.
- Authors
Siew Kim Lee; Anema, Skelte; Klostermeyer, Henning
- Abstract
Model processed cheese spreads were prepared from rennet casein, sunflower oil, water and a trisodium citrate/citric acid chelating salt system. The samples were cooked using a laboratory-scale processed cheese cooker. The moisture content of the samples varied from 49.1 to 55.6%. The samples were characterized by dynamic rheology, rotational viscometry and fat particle size analysis. With increasing moisture content, the rheological behaviour of the samples changed from solid-like (concentrated solution) to liquid-like (dilute solution). The moduli decreased and the frequencies at which G′- G′′ crossed over increased with increasing moisture content. Increasing moisture content resulted in an increase in pH and increase in the volume-to-surface diameter of the fat droplets. Rotational viscometry indicated that all the samples were shear thinning. The flow curves fitted a power law relationship ( r2 = 0.993). Thixotropic behaviour was displayed by all samples except those above 54% moisture. The shear stress at any particular shear rate increased with decreasing moisture content, indicating a stronger network structure in the low moisture samples.
- Subjects
MOISTURE; PROCESSED cheese; CHEESE products; VISCOSITY; ELASTICITY; DAIRY rheology
- Publication
International Journal of Food Science & Technology, 2004, Vol 39, Issue 7, p763
- ISSN
0950-5423
- Publication type
Article
- DOI
10.1111/j.1365-2621.2004.00842.x