Table I.

Fractional Chemical Composition of Sodium Alginates Extracted from Various Seaweed

Source	G	M
Ascophyllum nodosum (old tissue)	0.36	0.64
Ascophyllum nodosum (fruiting bodies)	0.10	0.90
Durvillea antartica	0.29	0.71
Laminaria digitata	0.46	0.54
Laminaria hyperborea (Stipe)	0.68	0.32
Laminaria hyperborea (Leaf)	0.55	0.45
Laminaria hyperborea (outer cortex)	0.75	0.25
Laminaria japonica	0.31	0.69
Macrocystis pyrifera	0.39	0.61