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Experimental set-up for Ag/Ca-alginate fibre production by extrusion of Ag/Na-alginate solution through a needle immersed in a gelling bath containing Ca2+ (0.18 M) by using a peristaltic pump: (a) insoluble fibres were formed by simple extrusion only; (b) microfibres were formed by extrusion into the gelling bath followed by stretching and wounding on a rotating roller.
