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Images of suspensions of iron particles (5% v/v) in solutions of alginate polymer at different times after preparation as indicated (days: hours: minutes: seconds). In each image, from left to right samples corresponding to the following concentrations of alginate polymer are seen: 5% w/v of LVSA polymer; 10% of LVSA polymer; 15% of LVSA polymer; 20% of LVSA polymer; and 8% of MVSA polymer. (Online version in colour.)
