fiber concentrate; Functional; Physicochemical; Prickly pear peel flour; Rheology; Thermogravimetry; Aqueous extraction; Fiber concentrate; Opuntia ficus indica; Physico-chemicals; Physicochemical property; Prickly pear; Thermal and rheological properties; Tunisian varieties; Food Science; Chemical Engineering (all); Safety, Risk, Reliability and Quality; Industrial and Manufacturing Engineering; General Chemical Engineering
Abstract :
[en] Prickly pear peel flour (PPF) byproduct is an attractive source of fibers. Fiber concentrates (PFC) were obtained using an aqueous extraction from PPF derived from different Tunisian varieties: Opuntia ficus-indica (yellow color and purple-pink color ecotypes) and Opuntia stricta (OS). Results showed that the extraction process increased fiber content from ~ 42 to 67% for the pink ecotype. Fiber concentrate obtained from the yellow ecotype presented high water holding capacity (9.18 g/g). Thermogravimetric analyses revealed that fibers were thermally more stable than their corresponding flours, at temperatures up to 230 °C and 150 °C, respectively, for OS variety. Rheological properties of aqueous suspensions of PFC or PPF showed a shear-thinning behavior at 4% concentration. Apparent viscosity increased with concentration and decreased with temperature. All suspensions showed a closed hysteresis loop at 6% concentration, with highest thixotropic property for PFC obtained from the yellow ecotype. These promising properties of PFC provided their possible use in many food formulations.
Disciplines :
Food science
Author, co-author :
Borchani, Maha; Laboratoire Valorisation, Analyses et Sécurité des Aliments, Université de Sfax, Ecole Nationale d’Ingénieurs de Sfax, Sfax, Tunisia
Masmoudi, Manel ; Laboratoire Valorisation, Analyses et Sécurité des Aliments, Université de Sfax, Ecole Nationale d’Ingénieurs de Sfax, Sfax, Tunisia
Ben Amira, Amal; Laboratoire Valorisation, Analyses et Sécurité des Aliments, Université de Sfax, Ecole Nationale d’Ingénieurs de Sfax, Sfax, Tunisia
Besbes, Souhail; Laboratoire Valorisation, Analyses et Sécurité des Aliments, Université de Sfax, Ecole Nationale d’Ingénieurs de Sfax, Sfax, Tunisia
Blecker, Christophe ; Université de Liège - ULiège > TERRA Research Centre > Smart Technologies for Food and Biobased Products (SMARTECH)
Attia, Hamadi; Laboratoire Valorisation, Analyses et Sécurité des Aliments, Université de Sfax, Ecole Nationale d’Ingénieurs de Sfax, Sfax, Tunisia
Language :
English
Title :
Physicochemical, thermal and rheological properties of prickly pear peel flours and fibers
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