Investigation of the microstructure of milk protein concentrate powders during rehydration: Alterations during storage

Mimouni, A., Deeth, H. C., Whittaker, A. K., Gidley, M. J. and Bhandari, B. R. (2010) Investigation of the microstructure of milk protein concentrate powders during rehydration: Alterations during storage. Journal of Dairy Science, 93 2: 463-472. doi:10.3168/jds.2009-2369


Author Mimouni, A.
Deeth, H. C.
Whittaker, A. K.
Gidley, M. J.
Bhandari, B. R.
Title Investigation of the microstructure of milk protein concentrate powders during rehydration: Alterations during storage
Journal name Journal of Dairy Science   Check publisher's open access policy
ISSN 0022-0302
1525-3198
Publication date 2010-02
Sub-type Article (original research)
DOI 10.3168/jds.2009-2369
Volume 93
Issue 2
Start page 463
End page 472
Total pages 10
Place of publication New York, NY, U.S.A.
Publisher Elsevier
Collection year 2011
Language eng
Formatted abstract
The aim of this work was to use scanning electron microscopy to investigate the microstructure of rehydrated milk protein concentrate powder (MPC) particles. A sample preparation method for scanning electron microscopy analysis of rehydrated MPC particles is described and used to characterize the time course of dissolution and the effects of prior storage on the dissolution process. The results show that a combination of different types of interactions (e.g., bridges, direct contact) between casein micelles results in a porous, gel-like structure that restrains the dispersion of individual micelles into the surrounding liquid phase without preventing water penetration and solubilization of nonmicellar components. During storage of the powder, increased interactions occur between and within micelles, leading to compaction of micelles and the formation of a monolayer skin of casein micelles packed close together, the combination of which are proposed to be responsible for the slow dissolution of stored MPC powders.
© 2010 American Dairy Science Association.
Keyword Scanning electron microscopy
Microstructure
Powder
Casein micelle
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Sun, 21 Feb 2010, 00:04:34 EST