Tamarind kernel polysaccharide

Tamarind seed polysaccharide, the gum fraction obtained from tamarind kernel polysaccharide, forms gels over a wide pH range in the presence of high sugar concentrations (>65 wt%), and it can therefore substitute for fmit pectins (65). 

The analysis of monosaccharide mixtures as the permethylated derivatives was proposed early in the application of gas-liquid chromatography to carbohydrates, but the method has now been superseded by more convenient procedures.230,231 There are, however, situations in which this method is useful, such as during a structural study of a polysaccharide by the methylation technique. The mixture of partially methylated monosaccharides obtained by methanolysis may then be fully methylated, and the proportions of the various monosaccharides determined. This approach has been used, for example, in studies on a galactomannan392 and on tamarind-kernel polysaccharide.393 Such an analysis also constitutes a useful check to ensure that no significant change in the composition of the polysaccharide occurred during methylation. 

An examination of another sample of the tamarind-kernel polysaccharide has given markedly different results, and it must be concluded that this preparation represents a distinct polysaccharide.151 The structural features outlined in the partial formula 87 are clearly present, as shown in a similar series of experiments. The composition of this polysaccharide is, however, clearly different from that reported... 

Tamarind kernel powder is insoluble in cold water, but upon heating forms thick viscous coUoidal dispersions at relatively low concentrations (2—3%). Upon drying, elastic films are formed. Tamarind seed polysaccharide is used as a low cost textile sizing agent in India. 

Srivastava, H.C. and Singh, P.P. (1967) Structure of the polysaccharide from tamarind kernel. Carbohydrate Research 4(4), 326-342. 

The major industrial product of tamarind seed is the tamarind kernel powder (TKP) which is an important sizing material used in the textile, paper, and jute industries 17). Tamarind seed is also the raw material used in the manufacture of polysaccharide (jellose), adhesive and tarmin. In 1942, two Indian scientists aimounced that decorticated kernels contained 46-48% of a gel-forming... 

Tamarind seed is a by-product of the tamarind pulp industry. Presence of tannins and other dyeing matters in the seed testa make the whole seed unsuitable for consumption, but they become edible after soaking and boiling in water. Tamarind seed is also used as raw material in the manufacture of polysaccharide (jellose), adhesive and tannin. Seeds and kernels are high in protein content, while the seed coat is rich in fiber and tannins (anti-nutritional factors). Seeds are gaining importance as an alternative source of proteins, and are besides a good source of fatty acids and rich in some essential minerals, such as Ca, P, Mg and K. 

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