For one-cycle compression,
a Texture Analyzer (LLOYD instruments, Fareham, UK) was used to
measure the forceetime curve. All experiments were conducted in
a controlled temperature room at 25 C. A cylinder probe (diameter
19 mm) compressed date syrup, placed in a plastic food container at
fixed quantity. The thickness of date syrup was 45 mm. The
crosshead was allowed to descend at the rate of 40 mm/min to
a total compression at 20 mm in all experiments. The instrument
automatically recorded the forceetime curve. All operations were
automatically controlled by the texture “Nexygen Lot” software
connected to the instrument Firmness (g) is the peak force of the
compression of the product and was measured by the Nexygen MT
machine software. Three replicates were conducted at each sample.