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Tragacanthic acid

Gum tragacanth is a mixture consisting of a salt of a complex acidic polysaccharide (tragacanthic acid) and a neutral polysaccharide which contains arabinose units. It is the latter which probably accounts for the isolation of arabinose from the crude gum. ... [Pg.246]

The mode of union of these units in the complex methylated tragacanthic acid is obvious from their identification but the order of combination is still obsciu%. The 2,3,4-trimethyl-D-xylose (XXXII) and 2,3,4-trimethyl-L-fucose (XLII) must arise from terminal residues in the complex, while the 3,4-dimethyl-D-xylose (XLIII) must be involved in union... [Pg.262]

GlcA-(l— 4)-l-Fuc was isolated from partial, acid hydrolyzates of soybean polysaccharide,134 the pectin of leaves of Tussilago,135 and tragacanthic acid,136 and a-L-Fuc-(l— 2)-D-Xyl was obtained from soybean polysaccharide.25... [Pg.303]

Fractionation of the major and minor components of gum tragacanth is achieved by a variety of techniques, e.g., filtration, centrifugation, fractional precipitation, etc. In this last technique, tragacanthin disperses in 3 1 ethanolrwater, while bassorin simultaneously precipitates as a gel. Acid hydrolysis of tragacanthin yields tragacanthic acid (Belitz and Grosch, 1987). [Pg.176]

Tragacanthic acid, the main component of gum tragacanth, contains interior chains that approximate most closely to those of a galactu-ronan.14,18 4-0-(a-D-Galactopyranosyluronic acid)-D-galacturonic acid (59) and the polymer-homologous trisaccharide 60 have been isolated... [Pg.361]

The side chains in tragacanthic acid have subsequently been encountered in the pectin-like polysaccharides from soy-bean cotyledons40 and soy-bean hulls.126 Very small proportions of single D-... [Pg.362]

Tragacanth is somewhat unusual in its solubility characteristics. It is one of the hydrophilic colloids and with water it forms a thick viscous liquid. Actually, tragacanth is not a completely soluble gum. It consists of two parts or fractions, one of which, called tragacanthin or tragacanthic acid, makes up about 30 to 40% of the whole. This part dissolves in water to give a colloidal hydrosol. The other... [Pg.38]

C12H20O11 340.283 Reducing disaccharide. Isol. from the partial acid hydrolysate of tragacanthic acid, the major polysaccharide component of tragacanth gum. [Pg.569]

The water insoluble part, tragacanthic acid, includes D-galacturonic acid, D-xylose, L-fructose, D-galactose, and other sugar units [3]. It has a main chain of a-D-galacturonopyranosyl bonded with (1 4) linkages. The main chain has randomly substituted xylosyl branches [24]. The water-soluble and the water-insoluble part components can be separated from each other through an easy procedure [4]. [Pg.496]

Aspinall G O, Baillie J 1963 Gum tragacanth. Part I. Fractionation of the gum and the structure of tragacanthic acid. J Chem Soc 1702-1714... [Pg.173]

See other pages where Tragacanthic acid is mentioned: [Pg.1006]    [Pg.73]    [Pg.262]    [Pg.263]    [Pg.137]    [Pg.333]    [Pg.340]    [Pg.361]    [Pg.361]    [Pg.362]    [Pg.362]    [Pg.362]    [Pg.362]    [Pg.363]    [Pg.363]    [Pg.363]    [Pg.20]    [Pg.243]    [Pg.135]    [Pg.300]    [Pg.360]    [Pg.252]    [Pg.169]    [Pg.310]    [Pg.279]    [Pg.279]    [Pg.602]    [Pg.602]    [Pg.2008]   
See also in sourсe #XX -- [ Pg.246 , Pg.262 ]

See also in sourсe #XX -- [ Pg.137 ]

See also in sourсe #XX -- [ Pg.246 , Pg.262 ]

See also in sourсe #XX -- [ Pg.24 , Pg.361 ]

See also in sourсe #XX -- [ Pg.361 ]

See also in sourсe #XX -- [ Pg.243 ]

See also in sourсe #XX -- [ Pg.602 ]



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Fucose from tragacanthic acid

Galacturonic acid tragacanth

Tragacanth

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