Free sugars and dietary fibre in some fruits of Bangladesh
1991
Rahman, S.M.M. | Mosihuzzaman, M.
Free sugar and dietary fibre (DF) contents of ten fruits of Bangladesh were determined. Analysis of free sugars showed that all the fruits except karamcha (0.6%) contained substantial amounts of glucose (1.1-6.3%) and fructose (0.6-5.4%), whereas sucrose was either absent or present in a small proportion (0.1-1.2%). The total DF content of the fruits varied between 0.2 (tarmuj) and 4.9 (jalpai) per cent of fresh fruit material. The smaller amounts (0.02-0.97%) of water-soluble DF of all the fruits were mainly composed of uronic acid (54-85%), arabinose (3-20%) and galactose (4-24%) residues. The larger amounts (0.17-2.55%) of water-insoluble non-starch polysaccharides were mainly composed of glucose (30-68%), uronic acid (9-40%), galactose (3-25%), arabinose (1-17%) and xylose (3-11%) residues. Starch content of the fruits was very low (trace-0.015%). Karamcha, amloki and jalpai were rich (2.5-4.9%) in DF and, interestingly, these fruits were also low in free sugars. The results may be used to evaluate the nutritional status of the fruits.
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