الفهرس 
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Abstract
The polysaccharides derived from land plants and seaweeds have been in use for thousands of years gum arabic was a comonent of embalming fluids used by the acient egyptions and red seaweeds were cooked by the chinese during the time of cenfucius to produce a gel which was then flavored and sweetened the production of enormous range of microbial exopolysacc harides has been developed during the past two decades.