Date flesh: Chemical composition and characteristics of the dietary fibre

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• 作者：Mohamed Elleuch ; Souhail Besbes ; Olivier Roiseux ; Christophe Blecker ; Claude Deroanne ; Nour-Eddine Drira ; Hamadi Attia
• 关键词：Date by-products ; Chemical composition ; Fleshes ; Dietary fibre concentrates ; Physicochemical properties
• 刊名：Food Chemistry
• 出版年：2008
• 出版时间：1 December 2008
• 年：2008
• 卷：111
• 期：3
• 页码：676-682
• 全文大小：221 K

文摘

The date by-products of two date palm (Phoenix dactylifera L.) cultivars, Deglet-Nour and Allig, from the Degach region (Tunisia), were analysed for their main chemical composition. Studies were also conducted on the physicochemical properties (colour, water and oil-holding capacity and rheological behaviour) of dietary fibre (DF) extracted from date flesh. The following values (on a dry matter basis: DM) were obtained for fleshes of Deglet-Nour and Allig cultivars, respectively: sucrose 52.7 % and 13.9 % , glucose 13.7 % and 29.9 % , fructose 12.6 % and 29.0 % , total dietary fibre 14.4 % and 18.4 % , protein 2.1 % and 3 % , ash 2.5 % and 2.52 % . Insoluble DF, the major fraction of total DF, constituted 9.19–11.7 % DM for Deglet-Nour and Allig, respectively. The elaboration of DF concentrates from date fleshes was characterised by an extraction yield of 67 % . The chemical composition of these DF concentrates showed high total DF contents (between 88 % and 92.4 % DM) and low protein and ash contents (8.98–9.12 % and 2.0–2.1 % DM, respectively). The DF concentrates showed a high water-holding capacity (15.5 g water/g sample) and oil-holding capacity (9.7 g oil/g sample) and pseudoplasticity behaviour of their suspensions. Thus, date DF concentrates may not only be an excellent source of DF but an ingredient for the food industry.