Article (Scientific journals)
Effect of sonication pretreatment on physico-chemical, surface and thermal properties of date palm pollen protein concentrate
Sebii, H.; Karra, S.; Bchir, B. et al.
2019In LWT - Food Science and Technology, 106, p. 128-136
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Keywords :
Date palm pollen; Extraction; Properties; Protein concentrate; Sonication
Abstract :
[en] Sonication assisted isoelectric precipitation protein extraction was investigated, to determine the effect of sonication pretreatment (20 KHz, 2 s pulse on and 1 s pulse off for 30 min) on the physico-chemical, surface and thermal properties of date palm pollen concentrate. Concentrates obtained only by isoelectric precipitation and with the addition of sonication pretreatment were compared on the basis of their structure and their functional properties. Significant differences (P < 0.05) were observed in surface properties, where sonicated sample exhibited a better capacity of reducing the surface tension at pH 7 even at low protein concentration (0.5 g/100 mL) reaching 40.7 mN/m. It was also deduced that thermal properties are strongly influenced by the sonication treatment since the temperature and enthalpy of protein's denaturation decreased significantly (P < 0.05). These differences were attributed to the induced modifications in protein's structure caused by sonication. Deductions align with what has been observed in the scanning electron microscopy that showed sonication leads to the modification of protein's structure. © 2019 Elsevier Ltd
Disciplines :
Food science
Author, co-author :
Sebii, H.;  University of Sfax, National Engineering School of Sfax, Laboratory of Analysis Valorization and Food Safety, Soukra Road, BP W-3038, Sfax, Tunisia
Karra, S.;  University of Sfax, National Engineering School of Sfax, Laboratory of Analysis Valorization and Food Safety, Soukra Road, BP W-3038, Sfax, Tunisia
Bchir, B.;  University of Sfax, National Engineering School of Sfax, Laboratory of Analysis Valorization and Food Safety, Soukra Road, BP W-3038, Sfax, Tunisia
Ghribi, A. M.;  University of Sfax, National Engineering School of Sfax, Laboratory of Analysis Valorization and Food Safety, Soukra Road, BP W-3038, Sfax, Tunisia
Danthine, Sabine  ;  Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > SMARTECH
Blecker, Christophe ;  Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > SMARTECH
Attia, H.;  University of Sfax, National Engineering School of Sfax, Laboratory of Analysis Valorization and Food Safety, Soukra Road, BP W-3038, Sfax, Tunisia
Besbes, S.;  University of Sfax, National Engineering School of Sfax, Laboratory of Analysis Valorization and Food Safety, Soukra Road, BP W-3038, Sfax, Tunisia
Language :
English
Title :
Effect of sonication pretreatment on physico-chemical, surface and thermal properties of date palm pollen protein concentrate
Publication date :
14 February 2019
Journal title :
LWT - Food Science and Technology
ISSN :
0023-6438
eISSN :
1096-1127
Publisher :
Elsevier, United States
Volume :
106
Pages :
128-136
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 16 June 2020

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