Polysaccharides alginates

Akhland MS, Schuchmann HP, von Sonntag C. Degradation of the polysaccharide alginic acid a comparison of the effects of UV light and ozone. Environ Sci Technol 1990 24 379-383. 

In the present study, the polysaccharide alginic acid (AlA) with molecular weight (Mw) of 250 000 was chosen as a polyanion. The strong basic protein protamine sulfate (PtS) with Mw about 5000 was used as a polycation. The calcium carbonate matrices were successively employed as a core material because they dissolve in mild conditions and are non toxic. Our motivation to study this combination was to reach the more biocompatible shell composition. 

The stable hollow microcapsules on the basis of natural polysaccharide alginic acid and protein protamine sulfate are formed via LbL method. The (PtS/AlA)4 microcapsules fabricated are promising for biomedical applications. 

Rice proteins form complex with polysaccharides (alginate and carrageenan). ... 

Typical shell materials include gum acacia, maltodextrins, CDs, hydrophobically modified starch, and mixtures thereof. Other polysaccharides (alginate, carboxymethylcellulose, guar gum) and proteins (whey proteins, soy proteins, and sodium caseinate) may also be used nevertheless with lower application because of their low solubilities in water, although the addition of a small amount of these low solubility hydrocolloids has shown some beneficial effects on the stability of encapsulated ingredients (Gouin, 2004). 

Examples of algal polysaccharides alginates, galactans, and carrageenan. 

Polymer nano- or microparticles/microcapsules used in biomedical fields are fabricated from biocompatible biodegradable polymers. The list of these materials includes both natural materials, such as natural polysaccharides (alginate, cellulose, and chitosan as well as their many derivatives, etc.) and synthetic polymers. Natural polymers are attractive for cell immobilization due to their abundance and apparent biocompatibility. Synthetic polymers are used because of the high degree of control over the structure. Unlike natural materials, whose properties can vary from batch to batch, synthetic polymers provide highly consistent starting materials for any encapsulation technique. 

Franklin MJ, Nivens DE,3Kfeadge JT, Howell PL. Biosynthesis of the Pseudomonas aemginosa extracellular polysaccharides, alginate. Pel, and Psl. Front Microbiol 2011 2 167. 

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