Algins Macrocystis pyrifera

Hernandez-Carmona, G., McHuge, D.J., Arvizu-Higuera, D.L., Rodriguez-Montesinos, Y.E. Pilot plant scale extraction of alginate from Macrocystis pyrifera. 1. Effect of preextraction treatments on yield and quality of alginate. J. Appl. Phycol. 10, 507-513 (1999)... 

Gomez, C.G., Perez Eambrecht, M.V., Lozano, J.E., Rinaudo, M., Villar, M.A. Influence of extraction-purification conditions on final properties of alginates obtained from brown algae (Macrocystis pyrifera). Int. J. Biol. Macromol. 44, 365-371 (2009)... 

Alginate is extracted from brown algae (Phaeophyceae), including Laminaria digitata, Laminaria hyperborea. Laminaria japonica, Macrocystis pyrifera, and Ascophyllum nodosum [27] by treatment with aqueous alkali (NaOH) solutions [28], The filtered extract is treated with sodium or calcium chloride to precipitate alginate. Azotobacter and Pseudomonas may produce alginate by a biosynthesis pathway. 

A hydrol. prod, of alginic acids from algae, e.g. Macrocystis pyrifera. 

Alginates, which are also called alginic acids, are anionic linear polysaccharides secreted by brown seaweed and marine algae, including Laminaria hyperborea, Ascophyllum nodosum and Macrocystis pyrifera [3]. 

The species of brown seaweed most commercially exploited are Laminaria hyperborea, Macrocystis pyrifera and Ascophyllum nodosum, and the main producer countries are USA, Japan, China, France, and Norway. The extraction and purification of alginates are based on the conversion from the insoluble form (under calcium form) in the plant cell walls to the soluble one, normally the sodium salt, followed by successive dissolutions and precipitations to eliminate impurities... 

Genus Macrocystis M. pyrifera Pacific coasts, California New Zealand, giant kelp long, depth Widely branched thalli 25-50m 7-25m annual harvest 60 x 10 mt annual growth potential 60-lOOmt/ha, 14-21% alginic acid K, Cl, T. 

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