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Alginates from different species of brown seaweed vary in their chemical structure, resulting in different physical properties of alginates. Some species yield an alginate that gives a strong gel , another a weaker gel, some may produce a cream or white alginate, while others are difficult to gel and are best used for technical applications ...
Ascophyllum nodosum is harvested for use in alginates, fertilisers, and the manufacture of seaweed meal for animal and human consumption. Due to the high level of vitamins and minerals that bioaccumulate in A. nodosum, it has been used in Greenland as a dietary supplement. [6]
All brown algae contain alginic acid (alginate) in their cell walls, which is extracted commercially and used as an industrial thickening agent in food and for other uses. [54] One of these products is used in lithium-ion batteries. [55] Alginic acid is used as a stable component of a battery anode.
As with sodium carbonate however, mineral sources eventually supplanted seaweed in iodine production. [43] Alginate, a kelp-derived carbohydrate, is used to thicken products such as ice cream, jelly, salad dressing, and toothpaste, as well as an ingredient in exotic dog food and in manufactured goods.
Laminaria has been shown by recent research to have a favorable mannuronic/guluronic acid residues ratio (M/G ratio) for heavy metal absorption in its alginate. This M/G ratio is the ratio between the L-guluronate (G) and D-mannuronate (M) in the alginate, a natural anionic polymer that is found in all brown algae.
Alginates are used in industrial products such as paper coatings, adhesives, dyes, gels, explosives and in processes such as paper sizing, textile printing, hydro-mulching and drilling. Seaweed is an ingredient in toothpaste, cosmetics and paints. Seaweed is used for the production of bio yarn (a textile). [57]
The brown seaweed that washes up on Florida beaches is known as Sargassum. Once it washes ashore, the seaweed starts to rot and releases hydrogen sulfide gas, which smells like nasty, rotten eggs.
Calcium alginate is a water-insoluble, gelatinous, cream-coloured substance that can be created through the addition of aqueous calcium chloride to aqueous sodium alginate. Calcium alginate is also used for entrapment of enzymes and forming artificial seeds in plant tissue culture.
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