English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/59759
Title: Olive oil-in-water emulsions stabilized with caseinate: elucidation of protein-lipid interactions by infrared spectroscopy
Authors: Herrero, Ana M.; Carmona, Pedro; Pintado, T.; Jiménez Colmenero, Francisco; Ruiz-Capillas, C.
Issue Date: 2011
Publisher: Elsevier
Citation: Food Hydrocolloids 25: 12- 18 (2011)
Abstract: This paper reports a FT-IR study for probing lipid and protein structural changes and their interactions in various oil-in-wateremulsions. Two different emulsions were prepared using sodium caseinate, as stabilizer system, without and with microbial transglutaminase (MTG), denominated E/SC and E/SC + MTG respectively. Proximate composition, fat and water binding properties and textural characteristics were also evaluated in the emulsions. Penetration force and gel strength values were used to distinguish different (P < 0.05) textural behaviours depending on the formulation of emulsifying system. E/SC + MTG emulsion showed gel textural behaviour while E/SC lack of this property. The spectral results showed frequency upshifting of the amide I band in going from protein stabilizer systems isolate (the solution used as reference) to their corresponding emulsions, what is attributable to greater protein structural order upon emulsion formation. Enzymatic action of MTG in the sodium caseinate stabilizing system induces structural changes, in terms of lipid chain disorder or lipid–proteininteractions and protein secondary modifications, which may reflect the formation of a gel structure in the emulsion. These results could help to choose the stabilizing system that is most suitable and effective for its use in the formulation of food products.
URI: http://hdl.handle.net/10261/59759
DOI: 10.1016/j.foodhyd.2010.04.014
Identifiers: doi: 10.1016/j.foodhyd.2010.04.014
issn: 0268-005X
Appears in Collections:(CFMAC-IEM) Artículos
(ICTAN) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
Show full item record

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.