Laminaria alginic acid

Wang G, Lin W, Zhang L, Yan X, Duan D (2004) Programmed cell death in Laminaria japonica (Phaeophyta) tissues infected with alginic acid decomposing bacterium. Prog Nat Sci 14 1064-1068... 

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... 

D-Mannuronic acid (36) constitutes the major component of alginic acid, the main polysaccharide of the brown algae, in which L-guluronic acid (37) is also found. The ratio of D-mannuronic acid and L-guluronic acid can vary with the algal species, the type of tissue, and the age of the plant. In the case of Laminaria hyperborea, L-guluronic acid is the major component.130... 

Alginic acid is a polyuronic acid composed of residues of D-mannuronic acid and L-guluronic acid and is obtained chiefly from algae belonging to the Phaeo-phyceae, mainly species of Laminaria. 

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

The medicinal properties of Laminaria depend upon the content and qualitative composition of proteins and carbohydrates. Certain other properties that aid to its therapeutic use are the ability to absorb large amounts of water and increase in volume at the same time and the higher contents of various macro- and micronutrients as compared to the terrestrial plants. Also, possession of colloidal polymer contents such as agar, alginic acid, and others as well as mannitol, specific to the marine vegetation makes Laminaria a very potential medicinal food. 

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

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]. 

Discovered in the second half of the nineteenth century by the American chemist E.C.C. Stanford in Laminaria in the Pacific, alginic acid and alginates (see Chapter 15) represent 15-40% of dry weight of the following species that are extraded on an industrial scale Macrocystispyrifera (American Pacific coast) Ascophyllum nodosum (Europe) Laminaria sp. (Europe and Japan) and Ecklonia sp. (South Africa). 

Laminaria angusta Kjellim. L. cichorioides Miyabe. L. japonica Aresch. L. longipedalis Okam. L. religiosa Miyabe. Kun Bu or Hai Dai (thallus) Iodine, potasium, calcium, amino acids, laminarin, laminine, algin.33 Improve thyroid function, correct the malignant vicious cycle effect of iodine deficiency, lower blood pressure. 

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