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Gum arabic,a.k.a,acacia gum,is a complex arabinogalactan-type polysaccharide which is obtained as sticky exudates from the stems and branches of Acacia trees.It has been widely used in food,pharmaceutics,cosmetics or inks etc.The component with ‘wattle blossom-type structure of arabinogalactan-protein complex is believed to be responsible for the unique emulsifying characteristic of gum arabic.The aqueous gum arabic solution is generally regarded as a Newtonian fluid.