*3.10. Water Activity*

Rollers 1 cm thick and 2 cm in diameter, each cut from the tested product, were used for the measurements. The sample was placed in the measurement chamber. The analysis was performed by using water diffusion and activity analyzer ADA-7 (COBRABID, Pozna ´n, Poland) with a sample temperature control panel. The analyzer is equipped with dedicated software to record temporary water activity during water evacuation process [34]. All measurements were performed at 21.0 ± 0.2 ◦C. The duration of one measurement was set to 1000 s. Based on the obtained curves, the equilibrium value of water activity a<sup>w</sup> in the product and the transport rate V<sup>D</sup> were determined. All presented results are mean values (*n* = 7) and standard deviation.
