Laminaria digitata, algin

These materials are another polysaccharide. The name derives from its original source, brown algae. The current commercial sources are brown seaweeds such as Laminaria digitata, L. hyperborea, Ascophyllium nodosum and Fucus serratus. Different properties are obtained in alginates from different seaweeds. The sources are rocky coasts in the United States, the United Kingdom, France and Norway. 

Algin or Alginic Acid is a protein of marine algae and is found in many seaweeds. Its principal source of prepn is as a by-product of the extraction of iodine from kelp, principally from Laminaria digitata. It has been used mainly in Japan, for the prepn of films, fabric dressing, and for thickening jellies. Its soln in Na carbonate can be used as a... 

Algins/alginic acid Laminaria digitata, Laminaria hyperborea... 

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. 

Formed by the partial acid hydrolysis of a chemically reacted alginic acid, extracted from Laminaria digitata. Cryst. (EtOH/ EtOAc). 

Rosa glauca, alginates from Laminaria digitata and L. hyperborea, oligosaccharides released by enzymic hydrolysis of agarose, the rhamnomannans and acidic rhamnomannans of Sporothrix schenckii and Ceratocystis stenoceras, and cellulose 0-methyl, 0-carboxymethyl, and 0-hydroxyethyl ethers. Details of the structures of these polymers are included in Part II of this Report. 

Details of the methods used by the alginate-producing firms in Great Britain, France, and Norway have not been published, although it is known that cast Laminaria cloustoni or L. digitata, and to a lesser extent fresh Ascophyllum nodosum, are the starting materials most frequently used, and that in each case Stanford s process, or a modification thereof, is employed. 

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