Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 441860
Title The effect of diesters and lauric acid on rheological properties of air/water interfaces stabilized by oligofructose lauric acid monoesters
Author(s) Kempen, S.E.H.J. van; Schols, H.A.; Linden, E. van der; Sagis, L.M.C.
Source Journal of Agricultural and Food Chemistry 61 (2013)32. - ISSN 0021-8561 - p. 7829 - 7837.
DOI https://doi.org/10.1021/jf4018355
Department(s) Physics and Physical Chemistry of Foods
Food Chemistry Group
VLAG
Publication type Refereed Article in a scientific journal
Publication year 2013
Keyword(s) enzymatic-synthesis - esters - esterification - oligosaccharides - viscoelasticity - lipase - shear
Abstract In this study, the rheological properties of interfaces stabilized by oligofructose fatty acid esters were elucidated. First, the properties of interfaces stabilized by monoesters (ME), diesters (DE), lauric acid (LA), oligofructose (OF), and mixtures of ME with DE, LA, or OF were studied. Second, the properties of interfaces stabilized by the crude product (CP) containing ME, DE, LA, and OF were studied. The dependency of the dilatational modulus on frequency and deformation amplitude indicated the possible formation of a soft glass phase for ME, and a viscous interface for DE. When ME and DE were mixed at a ratio of 0.8/0.2, the experimental results suggest that the interfacial structure consists of islands of a glass phase formed by ME, dispersed in a 2D viscous phase of DE. CP stabilized interfaces, where the ratio ME/DE was higher, lead to a different rheological response. The ratio ME/DE plays an important role in the surface properties of the CP. This may have significant consequences for applications in macroscopic systems such as foams.
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