Stress relaxation tests were performed using the texture
analyzer. Cylindrical starch gel sections (20 mm diameter 10 mm
high) prepared according to the Section 2.2 were compressed to
25% of their original height using a 40 mm aluminum cylindrical
probe at the speed of 2.00 mm/s. After compression the force values
were then collected over a period of 120 s during which the probe
position was kept unchanged. To determine the texture components
the generalized Maxwell model with three elements was
then used to analyze stress relaxation data. Most relaxation curves
can be fitted by this model with two or three exponential terms
(Peleg & Pollak, 1982). Maxwell model can be written as follows: