• WordNet 3.6
    • n algin a gum used especially as a thickener or emulsifier
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Webster's Revised Unabridged Dictionary
    • n Algin (Chem) A nitrogenous substance resembling gelatin, obtained from certain algæ.
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Century Dictionary and Cyclopedia
    • n algin A mucilaginous substance obtained from certain algæ, Laminaria stenophylla and L. digitata. It slightly resembles gelatin, but differs from that in not coagulating to a jelly and in not being precipitated by tannin, from albumin in not coagulating by heat, and from gum arabic in being precipitated by mineral acids and several organic acids. Insoluble algin is a nitrogenous acid, alginic acid. This forms soluble salts with the alkaline metals; those of the heavy metals are for the most part insoluble in water. The solutions of algin are very viscid. It has 14 times the viscidity of starch and 37 times that of gum arabic. It may be used as a thickener and for flxing iron and aluminium mordants in calico-printing, as a waterproof dressing for cloth, and for emulsifying oils and clarifying wines and spirits. It may be obtained in thin transparent sheets, forming a substitute for parchment paper, gutta-percha, or gelatin; and it dries up to a horny substance which may be turned and polished like ivory or the ivory-nut.
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In literature:

ALGINE, a viscous gum obtained from certain sea-weeds, used as size for textile fabrics, and for thickening soups and jellies.
"The Nuttall Encyclopaedia" by Edited by Rev. James Wood
The algin extracted from the Pacific kelp can be used as a rubber surrogate for water-proofing cloth.
"Creative Chemistry" by Edwin E. Slosson
ALGIN, a viscous, gummy substance obtained from certain seaweeds, more especially those of the genus Laminaria.
"The New Gresham Encyclopedia. Vol. 1 Part 1" by Various

In news:

Is increasing its global prices on microcrystalline cellulose, carrageenan, alginate products, and other gums up to 15% or as contract terms permit in food, personal care, and other market segments.
New research indicates that an alginate-based biomaterial injected into heart attack victims may stave off further damage.
Our main product, SODIUM ALGINATE, with an annual output 5000 tons, is widely used in the textile printing and dyeing industry.