Time Independent Behavior of Tomato Paste

This paper deals with rheological behavior of tomato paste from the view point of time independent properties inclusive of processing variables such as sample temperature which influence on rheological properties as well as breaking temperature and concentration which beside the rheological properties, influence on the quality of final product. With this aim 10 tomato paste samples at various concentrations (17-25%) and breaking temperatures (65- 85 C o ) have been produced. The experimental results showed tomato paste behaves as a non-Newtonian semi-fluid which follows power law model that consistency coefficient (K) is supposed function of breaking temperature, concentration and sample temperature with consideration to superimpose function.

Authors:

• A. Heidarinasab
• V. Moghaddam Nansa

Keywords:

• Breaking temperature
• Concentration
• Power law
• Rheology
• Time independent.

References:

[1] M. A. Rao, M. C. Bourne, and H.J. Cooley, "Flow properties of tomato
concentrates,". J. Text.Stud., vol. 12, Sep. 1981, pp. 521-538
[2] M.C. Sanchez, C. Valencia, C. Gallaegos, A. Ciruelos, and A. lattore,
"Influence of processing on the rheological poperties of tomato paste,"
J. Sci. Food Agric., vol. 82, Mar. 2002, pp. 990-997
[3] S.Y. Xu, C.F. Shoemaker, and B. H. Lus, "Effect of break temperature
on rheological properties and microstructure of tomato juices and
pastes," J. Food Sci., vol. 51, Nov. 1985, pp. 399-402
[4] B. Yoo, and M.A. Rao, "Effect of unimodal particle size and pulp
content on the rheological properties of tomato puree," J. Text. Stud.,
vol. 25, May. 1994, pp. 421-436
[5] T. Tanglertpaibul, M. A. Rao, "Intrinsic viscosity of tomato serum as
affected by methods of determination and methods of processing
concentrates," J. Food Sci., vol. 52, Sep. 1987, pp. 1642-1645
[6] T. Tanglertpaibul, M. A. Rao, "Rheological properties of tomato
concentrates as affected by particle size and methods of processing
concentrates," J. Food Sci., vol. 52, Sep. 1987, pp. 141-145