Jump to ContentJump to Main Navigation

Online

49,00 € / $74.00*

* Prices subject to change. Shipping costs will be added if applicable.
Publication Date:
January 2009
ISSN:
1542-6580
DOI:
10.2202/1542-6580.1800

See all formats and pricing

Online
Individual Subscription Online only
Euro [D] 49.00
RRP for USA, Canada, Mexico
US$ 74.00 *
Print
Individual Subscription Online only
Euro [D] 218.00
RRP for USA, Canada, Mexico
US$ 294.00 *
Print + Online
Individual Subscription Online only
Euro [D] 262.00
RRP for USA, Canada, Mexico
US$ 353.00 *
*Prices subject to change. Shipping costs will be added if applicable.

New Journal at De Gruyter!

Ed. by de Lasa, Hugo / Xu, Charles

1 Issue per year

Increased IMPACT FACTOR 2011: 0.790

 

The Rheological Properties of Turkish Delight

Zurriye Yilmaz1 / Mehmet Dogan2 / Mahir Alkan3 / Serap Dogan4

1Balikesir University, zyilmaz@balikesir.edu.tr

2Balikesir University, mdogan@balikesir.edu.tr

3Balikesir University, malkan@balikesir.edu.tr

4Balikesir University, sdogan@balikesir.edu.tr

Citation Information: International Journal of Chemical Reactor Engineering. Volume 6, Issue 1, Pages –, ISSN (Online) 1542-6580, DOI: 10.2202/1542-6580.1800, January 2009

Publication History:
Published Online:
2009-01-03

In the food industry, rheological properties, such as viscosity, shear rate, and shear stress, are the most important parameters required in the design of a technological process. Therefore, in this study, we determined the flow behavior and the time-dependent flow properties of Turkish Delight (TD) in the temperature range of 25-75°C using a capillar rheometer. The structure and thermal properties of TD were investigated by XRD and a simultaneous DTA/TG analysis. The shear rate values ranged from 5 to 300s-1. We found that: (i) TD behaved as non- Newtonian pseudoplastic foodstuff; (ii) while the measurement temperature increased, viscosity decreased; and (iii) TD was a rheopectic material. The effect of temperature on viscosity was described by means of the Arrhenius equation. The activation energies for the flow of pseudoplastic TD varied from 50.1-74.2 kJ/mol, depending on shear rate. Three models were used to predict the flow behavior of TD, namely, the Power law, Bingham and Casson models. The Power law model adequately described well the flow behavior of TD at different temperatures.

Keywords: rheology; Turkish Delight; capillar rheometer; pseudoplastic; temperature

Comments (0)

Please log in or register to comment.