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Effect of the cryogenic cycles number (III, V and VII) on the variation of (A) storage modulus (G′) (solid symbols) and loss modulus (G″) (open symbols), (B) complex dynamic viscosity (|η*|) function of angular oscillation frequency at 25 °C for XG-based composite hydrogels obtained with a weight ratio between XG and PVA of 9:1, and Feteasca Neagra polyphenolic extracts.
