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Physicochemical, techno‐functional, and fat melting properties of spray‐dried camel and bovine milk powders

Abstract : In this study, three skimmed and one whole-fat spray-dried camel milk powders were produced and their characteristics were compared to those of bovine milk powders. The physicochemical analysis of the produced powders indicated that camel milk powders (whether skimmed or not) presented higher ash and whey protein contents as compared to those of bovine milk powders. Our results indicated that the investigated camel and bovine milk powders exhibited a high solubility index (>99%) with poor dispersibility and wettability indexes due to their small particles size (d 50 ≤ 12 μm) and their narrow size distribution (span ≤ 2). In addition, although camel and bovine milk powders presented the same total fat content, lower free fat content was measured for camel milk powders. Besides, the whey protein nitrogen index and the SDS-PAGE electrophoresis underlined that camel and bovine milk proteins remained intact after drying with low denaturation extent. It is worth noticed that camel milk proteins were less denaturized due to the absence of the heat-sensitive β-lactoglobulin in camel milk. Moreover, the low denaturation extent participated in the enhancing of the foaming capacity and stability of camel and bovine milk powders. Finally, the calorimetric analysis showed that higher fat melting temperatures were recorded in whole-fat camel milk powder and in their anhydrous form as compared to those of bovine milk.
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Submitted on : Tuesday, January 19, 2021 - 1:26:33 PM
Last modification on : Thursday, May 6, 2021 - 3:22:17 PM

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Ahmed Zouari, Roua Lajnaf, Christelle Lopez, Pierre Schuck, Hamadi Attia, et al.. Physicochemical, techno‐functional, and fat melting properties of spray‐dried camel and bovine milk powders. Journal of Food Science, Wiley, 2021, 86 (1), pp.103-111. ⟨10.1111/1750-3841.15550⟩. ⟨hal-03115051⟩

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