Article (Scientific journals)
Effect of extraction methods on the physicochemical, structural, functional, and antioxidant properties of the dietary fiber concentrates from male date palm flowers
Karra, S.; Sebii, H.; Yaich, H. et al.
2020In Journal of Food Biochemistry, 44 (6), p. 1-12
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Keywords :
Agricultural wastes; Agriculture; Antioxidants; Extraction; Food waste; Fourier transform infrared spectroscopy; Free radicals; Microstructure; Oils and fats; Physicochemical properties; Scanning electron microscopy; Date palm; Dietary fibers; Extraction method; Functional properties; Natural antioxidants; Functional food
Abstract :
[en] The current study evaluates the effect of both aqueous and alkaline extraction methods on the physicochemical, structural, functional, and antioxidant properties of dietary fibers (DF) from male date palm flowers (MDPF). The DF extracted by the alkali treatment (ADF) display a higher DF content as well as lower protein and lipid content than the DF resulting from watery extraction (WDF). The scanning electron microscopy, the Fourier-transform infrared spectroscopy, and the X-ray diffraction show that the alkaline treatment contributes to a slight modification of the structural characteristics of ADF leading to better purity and functional properties. The oil holding capacity and the antioxidant activity of ADF have improved compared to the WDF, which makes this concentrate a promoting functional ingredient and a natural antioxidant. Therefore, these findings confirm the wealth of both concentrates in DF, especially ADF, as well as their potential of functional and antioxidant properties, which emphasize their suitability to be used in food applications as functional ingredients. Practical applications: Nowadays, studies on the extraction of DF from vegetable waste are of considerable interest in the face of the rising global demand for dietetic food. The male date palm flowers (MDPF), an agricultural waste generated during the period of pollination, are valuable natural sources of DF and antioxidants. The insoluble DF of MDPF could be essential in a balanced diet as they could fight against obesity by creating a feeling of satiety. The presence of antioxidants, which are known for preventing or slowing cell damage caused by free radicals, could contribute to the improvement of the antioxidant properties of the formulated food. The functional properties of DF concentrates from MDPF are able to solve the technical problems of agri-food industries when used as food ingredients. The use of DF from MDPF, consequently, contributes to the minimization of waste and provides value addition to the by-product considered as waste in agricultural processing. © 2020 Wiley Periodicals, Inc.
Disciplines :
Food science
Author, co-author :
Karra, S.;  Laboratory of Analysis Valorisation and Food Safety, Department of Biology, National School of Engineers of Sfax, University of Sfax, Sfax, Tunisia
Sebii, H.;  Laboratory of Analysis Valorisation and Food Safety, Department of Biology, National School of Engineers of Sfax, University of Sfax, Sfax, Tunisia
Yaich, H.;  Laboratory of Analysis Valorisation and Food Safety, Department of Biology, National School of Engineers of Sfax, University of Sfax, Sfax, Tunisia
Bouaziz, M. A.;  Laboratory of Analysis Valorisation and Food Safety, Department of Biology, National School of Engineers of Sfax, University of Sfax, Sfax, Tunisia
Blecker, Christophe ;  Université de Liège - ULiège > Département GxABT > SMARTECH
Danthine, Sabine  ;  Université de Liège - ULiège > Département GxABT > SMARTECH
Attia, H.;  Laboratory of Analysis Valorisation and Food Safety, Department of Biology, National School of Engineers of Sfax, University of Sfax, Sfax, Tunisia
Besbes, S.;  Laboratory of Analysis Valorisation and Food Safety, Department of Biology, National School of Engineers of Sfax, University of Sfax, Sfax, Tunisia, Laboratory of Food Science and Formulation, Faculty of Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium
Language :
English
Title :
Effect of extraction methods on the physicochemical, structural, functional, and antioxidant properties of the dietary fiber concentrates from male date palm flowers
Publication date :
2020
Journal title :
Journal of Food Biochemistry
ISSN :
0145-8884
Publisher :
Blackwell Publishing Ltd
Volume :
44
Issue :
6
Pages :
1-12
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
MHE - Ministry of Higher Education and Scientific Research, MHE
WBI - Wallonie-Bruxelles International [BE]
Available on ORBi :
since 19 February 2021

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