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Storage (G′) and loss (G″) moduli of the CBM/CMC, CBM/CMC/GEO, CBM/CMC/CEO and CBM/CMC/EEO hydrogels as a function of angular frequency. CBM carbomer 940, CMC carboxymethyl chitosan, EEO eucalyptus essential oil, GEO ginger essential oil, CEO cumin essential oil
