tragacanth

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tragacanth

tragacanth (trăgˈəkănth) or gum tragacanth, gummy exudation from the leguminous shrub Astragalus gummifer and related pulse family plants of SE Europe and W Asia. It is obtained through incisions in the stem of the plant. The gum is produced chiefly in Iran. Tragacanth is almost insoluble in water but swells in it to form a stiff gel. It is used as an emulsifying agent, as a component of pills, hand lotions, and medicinal lubricating jellies, as a demulcent, and as a sizing material. A gum (sometimes called Indian tragacanth) from a plant of the sterculia family is sold as a cheaper substitute. See gum.
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tragacanth

[′traj·ə‚kanth]
(materials)
The gummy exudate produced by certain Asiatic species of Astragalus ; consists of a soluble portion containing uronic acid and arabinose, and an insoluble portion that absorbs water and swells to make a stiff opalescent mucilage.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Arunachalam, "Green fabrication of silver nanoparticles by gum tragacanth (Astragalus gummifer): a dual functional reductant and stabilizer," Journal of Nanomaterials, vol.
It received normal green fodder and 150 mg/kg body weight aloxan intravenously as well as Glimepiride in 5 mL of 2% gum tragacanth suspension orally (Sumon et al., 2008).
The dissolution profile of formulations [H.sub.4], [H.sub.2][G.sub.2], [H.sub.2][X.sub.2], and [H.sub.2][T.sub.2], composed of HPMC K100M alone and in combination with guar gum (1:1); HPMC K100M and xanthan gum (1:1); HPMC K100M and gum tragacanth (1:1), are shown in Figure-3.