Pectin legume

Detergent Methods. The neutral detergent fiber (NDF) and acid detergent fiber (ADF) methods (2), later modified for human foods (13), measure total insoluble plant cell wall material (NDF) and the cellulose—lignin complex (ADF). The easily solubilized pectins and some associated polysaccharides, galactomaimans of legume seeds, various plant gums, and seaweed polysaccharides are extracted away from the NDF. They caimot be recovered easily from the extract, and therefore the soluble fiber fraction is lost. 

In legume seeds such as SB, the main constituents of dietary fiber are cellulose, hemicelluloses, pectins, and glycoproteins or proteoglycans, found in the parenchymal cells of the cotyledons (Selvendran et al., 1987). The main fiber components of... 

The indigestible polysaccharides are collectively referred to as dietary fiber. All dietary fiber comes from plants. There is insoluble fiber, mainly from the structural cellulose parts of plants, and soluble fiber—the gums and pectins. Barley, legumes, apples, and citrus fruits are foods with a high content of gums and pectins. 

Pectin Most standard procedmres for pectin analysis in vegetables and legumes involve extraction of the pectin as pectic acid followed by precipitation. Aqueous extraction of the pectin is followed by saponification with cold alkali, acidification, and the quantification of the precipitate. The pectic acid can be precipitated as calcium pectate or, as in the AOAC procedure, using ethanol. 

Soluble dietary fibre includes a certain proportion of hemi-ceUuloses. For example, about one third of cereal structural arabinoxylans are soluble. Also, one quarter to about one half of barley fl-glucans are soluble, and even a certain proportion of glucomannans and galactomannans of legumes are soluble. Other soluble polysaccharides are pectins, plant mucilages, seaweed polysaccharides, modified starches and modified celluloses (Table 4.21). 

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