Title of article :
Interfacial protein engineering for spray-dried emulsions – Part II: Oxidative stability
Author/Authors :
Damerau، نويسنده , , Annelie and Moisio، نويسنده , , Timo and Partanen، نويسنده , , Riitta and Forssell، نويسنده , , Pirkko and Lampi، نويسنده , , Anna-Maija and Piironen، نويسنده , , Vieno، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2014
Pages :
8
From page :
57
To page :
64
Abstract :
The aim of this work was to investigate how the oxidative stability of encapsulated oil is affected by the humidity response of a Na-caseinate–maltodextrin matrix. Furthermore, the effect of modification of the interfacial Na-caseinate layer through cross-linking was studied. For this purpose, two model spray-dried emulsions containing sunflower oil, maltodextrin, and either non-cross-linked or cross-linked Na-caseinate were stored at different relative humidities (RHs; ∼0%, 11%, 33%, 54%, and 75%). Increasing RH improved the oxidative stability of the spray-dried emulsions. This behaviour was mainly linked to the loss of individual powder particles upon caking and collapsing of the matrix at RH 75%. Oxidation of non-encapsulated surface lipids with a proportion of ca. 5% of total lipids was only twofold compared to total lipids. Excess protein on particle surfaces may have delayed oxidation, e.g., by its radical scavenging activity. Under several storage conditions, cross-linking of the protein slightly improved the oxidative stability.
Keywords :
Maltodextrin–Na-caseinate , Cross-linking , Oxidation , Sunflower oil , Spray-dried emulsion
Journal title :
Food Chemistry
Serial Year :
2014
Journal title :
Food Chemistry
Record number :
1975088
Link To Document :
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