Figure 2.

Shear rate dependence of the hydrogels’ shear viscosity. Black symbols indicate samples with 1 wt % of alginate and Ca²⁺ 6 mM, blue symbols indicate samples with 1 wt % of alginate and Ca²⁺ 8 mM, red symbols are for samples with 1 wt % of alginate and Ca²⁺ 10 mM, and green symbols represent samples with 0.5 wt % of alginate and Ca²⁺ 4 mM. (a) Hydrogels without essential oil; (b) hydrogels with 0.1% essential oil; (c) hydrogels with 0.5% essential oil.