The Plant cell wall as a source of dietary fiber: Chemistry and structure
1984
Selvendran, Robert R.
Dietary fiber (DF) is defined and the various components of DF for the main food groups in a mixed diet are discussed. Carbohydrate polymers from dicotyledonous and monocotyledonous plants are discussed separately; the main emphasis is on the cell walls of edible plant organs. Attention is drawn to the structural features of the polymers, which are of special interest in context of the chemical analysis, or their mode of action in the human alimentary tract. The relationship of the operationally-defined groups of polymers to structural families, and the main sugars and glycosidic linkages present in the major polysaccharides, are tabulated. Gums, commonly used in food processing, are classified according to structural features. Sources and the monosaccharides found in each are listed. The monosaccharide content of DF in some fruits, vegetables, and seed products is given. Results of clinical feeding trials with concentrated bran fiber are reported and a possible mechanism for the mode of action of the DF in the human colon is postulated. (emc)
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