Abstract
This study was conducted to develop a protocol for diffusion syrups high in fructose from dates of cv. Ghars. Date syrups prepared were cooled to 4°C for more than 70 days to induce crystallization of glucose. This treatment improved the nutritional quality of the syrup and reduction of the glucose fraction bringing the sugar composition closer to that of the second and third generation of high fructose corn syrup HFCS (55 and 90%, respectively) as compared to 42% of the first generation. The content of fructose achieved reached 78% as confirmed by thin layer chromatography marking a significant reduction in glucose content and suggesting that this prepared syrup is an excellent potential product as a dietary replacement to regulate blood glucose.
Highlights
The date palm (Phoenix dactylifera L.) is an abundant fruit tree species in southeastern Algeria, a semiarid area with a wide genetic diversity of date palms marked by more than 900 cultivars (Hanachi and Khitri, 1998)
The extraction procedure of date syrup gave a yield of 25% solids after concentrating at 60°C for cv Ghars
The syrup product developed in this study represents a good nutritional source of fructose which differs from HFCS by the presence of nutrients from dates
Summary
The date palm (Phoenix dactylifera L.) is an abundant fruit tree species in southeastern Algeria, a semiarid area with a wide genetic diversity of date palms marked by more than 900 cultivars (Hanachi and Khitri, 1998). To exploit this richness, preserve local production and conserve heritage palm plantations, commercial opportunities for consumption have to be identified. Fructose presents various advantages over other simple sugars for intake by the diabetics and dieters.
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