Medical applications alginates

Alginate Pseudomonas spices and Azotobacter vinelandii For the production of micro- or nanostructures suitable for medical applications... 

The kind of polysaccharides that are isolated from different bacteria are as follows Alginate, a linear copolymer with (l-4)-linked p-D-mannuronate and its a-L-guluronate residues that is produced by two bacterial genera Pseudomonas species and Azotobacter vinelandii [4]. Bacterial alginates are useful for the production of micro- or nanostructures suitable for medical applications. Cellulose, a p (1—>4) linked D-glucose unit obtained from Acetobacter xylinum. Cellulose of plant origin is usually impure as it contains... 

Alginates have been considered for medical applications such as drug delivery, wound coverage material, and cell encapsulation/transplantation based on its unique properties such as emulsifiers, thickeners, stabilizers, gelling and film forming resulting in several applications. 

Similar to the chemical modifications applied to alginate, chitosan can be treated with chloro-acetic acid, ethylene oxide, and propylene oxide to obtain sodium car-boxymethyl chitosan, hydroxyethyl chitosan, and hydroxypropyl chitosan, respectively. These derivatives are highly absorbent and can be used for the production of superabsorbent fibers for medical applications. In addition to enhanced absorption properties, it is known that carboxymethyl chitosan possesses unique wound-healing properties whereby the application of foams, hydrogels, or nonwoven dressings can effectively promote the healing of chronic ulcerative wounds. 

Alginates are non-toxic and renewable natural polymers. They have been used in food, textile printing and medical applications largely because of their excellent gel forming properties. Alginate fibers can be fabricated either via conventional spinning or electrospinning into non-woven fabrics, woven fabrics or composites. 

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