Immediately after the production (t

Immediately after the production (t0) and after the storage period (tn) the pH (ph meter, mod.
Cyberscan 510), soluble solids content (SSC) (refractometer, PR-1 Atago, Japan), titratable acidity
(expressed in citric acid equivalent), ascorbic acid content (iodometric method) and Bostwick consistency
(Bostwick consistometer) were evaluated. Furthermore after the storage period (tn) the moisture content
(at 70°C until constant weight), the water activity (water activity meter, Decagon Devices Inc., Pullman,
Usa), the colour parameters (colour-spectrophotometer mod. Colorflex, Hunterlab, Usa), and the
rheological characteristics by using a controlled stress–strain rheometer (MCR 300, Physica/Anton Paar)
and a cone and plate geometry sensor (50mm diameters, 2° angle with a gap distance of 1mm) were also
determined. The flow ramp was performed at 25°C in a range of shear rate from approximately 0 to 300 s-
1. The viscosity (