Viscoelastic moduli as a function of shear strain frequency for fixed shear strain amplitude within the LVR, for solutions of alginate polymer and suspensions of iron particles in alginate polymer solutions: unfilled triangle/filled triangle, sample 0Fe-15LVSA; unfilled circle/filled circle, sample 5Fe-15LVSA; unfilled diamond/filled diamond, sample 0Fe-8MVSA; unfilled square/filled square, sample 5Fe-8MVSA. Full symbols represent values of the storage modulus (G′) and open symbols represent values of the loss modulus (G′′). (Online version in colour.)