Effect of date flesh fiber concentrate addition on bread texture

Yıl 2015, Cilt: 10 Sayı: 2, 17 - 22, 01.06.2015

C. Borchanı C. Blecker H. Attıa M. Masmoudı S. Besbes

Öz

Composition of second-grade dates from the potential Tunisian cultivars “Deglet Nour” was similar to that of
commercial dates. In fact, date flesh could present a value addition by extraction and use of date flesh fiber
concentrate in bread formulation. Date flesh fiber concentrate (DFFC) of Deglet Nour variety was extracted and
dried at 40 °C. This concentrate was added to wheat flour bread at 0.5%, 1%, 2% and 3% levels to increase the
dietary fiber content. The effect of DFFC addition on the textural properties of bread during storage at 25 °C was
investigated. In most cases, addition of DFFC did not affect significantly the water activity (aw) values of crumb.
During storage of breads, a significant reduction in aw was observed in fortified breads with 1% and 3% levels of
fibers. Besides, fresh bread (day-0) and stale bread (days-2) showed a significant increase in firmness of crumb
whatever the addition level of fibers. Incorporation of DFFC in bread formulation could give an interesting value
addition to date fleshes. This fact is of great economic interest owing to applications of DFFC in the food,
pharmaceutical and medicinal industries.

Anahtar Kelimeler

Date flesh fiber concentrate, bread, storage, firmness