Article (Scientific journals)
Effect of pH on the physicochemical characteristics and the surface chemical composition of camel and bovine whey protein's powders.
Zouari, Ahmed; Briard-Bion, Valérie; Gaucheron, Frédéric et al.
2020In Food Chemistry, 333, p. 127514
Peer Reviewed verified by ORBi
 

Files


Full Text
1-s2.0-S0308814620313765-main.pdf
Publisher postprint (517.88 kB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Crystallization; Protein Denaturation; Surface Properties; Water/chemistry; Camel whey proteins; Glass transition temperature; LC–MS; X-ray Photoelectron spectroscopy
Abstract :
[en] This study investigated the effect of pH on the denaturation extent, the surface chemical composition, the water sorption isotherm and the glass transition temperature of camel and bovine whey protein's powders. The LC-MS analysis indicated that the β-Lactoglobulin was the most denatured protein in bovine whey powders regardless the pH value, while this protein was totally absent in camel whey. The α-Lactalbumin was relatively heat stable after drying and predominated the powder surface (X-ray photoelectron spectroscopy results) in both camel and bovine whey powders regardless the pH (neutral (6.7) or acidic (4.3 and 4.6)). Analysis of the water sorption isotherms indicated that decreasing the pH induced the increase of the water activity of lactose crystallization for camel and bovine whey powders. Finally, decreasing the pH led to the decrease of the glass transition temperature of camel and bovine whey powder (at 0.13, 0.23, and 0.33 of water activity).
Disciplines :
Food science
Author, co-author :
Zouari, Ahmed;  Valuation, Security and Food Analysis Laboratory, National Engineering School of Sfax, Sfax University, Tunisia, UMR-STLO: Science and Technology of Milk and Egg, INRA, Agrocampus Rennes, France. Electronic address: ahmedzouarri@gmail.com.
Briard-Bion, Valérie;  UMR-STLO: Science and Technology of Milk and Egg, INRA, Agrocampus Rennes, France.
Gaucheron, Frédéric;  UMR-STLO: Science and Technology of Milk and Egg, INRA, Agrocampus Rennes, France.
Schuck, Pierre;  UMR-STLO: Science and Technology of Milk and Egg, INRA, Agrocampus Rennes, France.
Gaiani, Claire;  Université de Lorraine, Laboratoire d'Ingénierie des Biomolécules (LIBio), Nancy, France.
Triki, Mehdi;  Valuation, Security and Food Analysis Laboratory, National Engineering School of Sfax, Sfax University, Tunisia.
Attia, Hamadi;  Valuation, Security and Food Analysis Laboratory, National Engineering School of Sfax, Sfax University, Tunisia.
Ayadi, Mohamed ;  Valuation, Security and Food Analysis Laboratory, National Engineering School of Sfax, Sfax University, Tunisia. Electronic address: ayadimedali@gmail.com.
Language :
English
Title :
Effect of pH on the physicochemical characteristics and the surface chemical composition of camel and bovine whey protein's powders.
Publication date :
15 December 2020
Journal title :
Food Chemistry
ISSN :
0308-8146
eISSN :
1873-7072
Publisher :
Elsevier, Barking, Gb
Volume :
333
Pages :
127514
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
Copyright © 2020 Elsevier Ltd. All rights reserved.
Available on ORBi :
since 10 December 2024

Statistics


Number of views
3 (0 by ULiège)
Number of downloads
0 (0 by ULiège)

Scopus citations®
 
11
Scopus citations®
without self-citations
11
OpenCitations
 
9
OpenAlex citations
 
10

Bibliography


Similar publications



Contact ORBi