Article (Scientific journals)
Structure-function relationship of black cumin seeds protein isolates: Amino-acid profiling, surface characteristics, and thermal properties
Trigui, I.; Yaich, H.; Zouari, A. et al.
2021In Food Structure, 29
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Keywords :
Black cumin seeds proteins; Functional properties; Interfacial tension; Response surface methodology; Structural characterization
Abstract :
[en] The aim of the present investigation was to determine the chemical composition, the amino-acid profiling, the structural characteristics and the functional properties of protein isolates of two black cumin seeds varieties. Response surface methodology (RSM) was firstly carried out to determine optimal conditions of proteins extraction from black cumin seeds. Results indicated that the meal to solvent ratio, pH and extraction time were stated as the main influencing factors to obtain protein isolates of black cumin seeds. The protein content of cumin seeds protein isolates varied between 68.76%–78.41% showing the predominance of glutamic acid (12.73–14.59 %), aspartic acid (5.28–5.62 %) and arginine (4.94–5.49 %) amino acids. X-ray diffraction patterns of the protein isolates showed a semi-crystalline structure. Structural characterization by FTIR analysis showed the typical peaks of protein, namely, amide I, amide II and amide III. The thermal properties of protein isolates were investigated by differential scanning calorimetry. A denaturation temperature ranged from 88.11 °C to 90.65 °C. Black cumin seeds protein isolates were able to decrease the interfacial tension (down to 17.62 mN/m) leading to an interesting emulsifying (up to 159.53 m2/g) and foaming (up to 145.54 %) properties as function of pH. © 2021 Elsevier Ltd
Disciplines :
Food science
Author, co-author :
Trigui, I.;  Laboratoire de Valorisation, Analyses et Sécurité des Aliments, Université de Sfax, École Nationale d'Ingénieurs de Sfax, Route de Soukra, Sfax, 3038, Tunisia
Yaich, H.;  Laboratoire de Valorisation, Analyses et Sécurité des Aliments, Université de Sfax, École Nationale d'Ingénieurs de Sfax, Route de Soukra, Sfax, 3038, Tunisia
Zouari, A.;  Laboratoire de Valorisation, Analyses et Sécurité des Aliments, Université de Sfax, École Nationale d'Ingénieurs de Sfax, Route de Soukra, Sfax, 3038, Tunisia
Cheikh-Rouhou, S.;  Laboratoire de Valorisation, Analyses et Sécurité des Aliments, Université de Sfax, École Nationale d'Ingénieurs de Sfax, Route de Soukra, Sfax, 3038, Tunisia
Blecker, Christophe ;  Université de Liège - ULiège > Département GxABT > SMARTECH
Attia, H.;  Laboratoire de Valorisation, Analyses et Sécurité des Aliments, Université de Sfax, École Nationale d'Ingénieurs de Sfax, Route de Soukra, Sfax, 3038, Tunisia
Ayadi, M. A.;  Laboratoire de Valorisation, Analyses et Sécurité des Aliments, Université de Sfax, École Nationale d'Ingénieurs de Sfax, Route de Soukra, Sfax, 3038, Tunisia
Language :
English
Title :
Structure-function relationship of black cumin seeds protein isolates: Amino-acid profiling, surface characteristics, and thermal properties
Publication date :
2021
Journal title :
Food Structure
eISSN :
2213-3291
Publisher :
Elsevier Ltd
Volume :
29
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Ministère de l’Enseignement Supérieur et de la Recherche Scientifique, MESRS
Available on ORBi :
since 19 November 2021

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