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 497418
Title Time domain nuclear magnetic resonance as a method to determine and characterize the water-binding capacity of whey protein microparticles
Author(s) Peters, J.P.C.M.; Vergeldt, F.J.; As, H. Van; Luyten, H.; Boom, R.M.; Goot, A.J. van der
Source Food Hydrocolloids 54 (2016). - ISSN 0268-005X - p. 170 - 178.
DOI http://dx.doi.org/10.1016/j.foodhyd.2015.09.031
Department(s) Food Process Engineering
Food Process Engineering group (FPE)
Biophysics
VLAG
Publication type Refereed Article in a scientific journal
Publication year 2016
Keyword(s) Centrifugation - Microstructure - Nuclear magnetic resonance - Whey proteins - Swelling - Water-binding capacity
Abstract

Water-binding capacity (WBC) is commonly measured with a centrifugation method in which a sample is hydrated in excess water and the pellet weight after centrifugation defines the WBC. When a dispersion is being analyzed, here containing whey protein microparticles (MPs), the pellet consists of swollen particles and water between the particles. These two water domains in MP pellets were distinguished using time domain nuclear magnetic resonance (TD NMR). This distinction showed that an increase in WBC from 2 to 5.5 g water/g dry matter was mainly due to an increase in water between the MPs. Besides, it was found that TD NMR-measurements could be used to provide accurate values of the amount of water in both water domains in MP pellets. This makes TD NMR therefore a more accurate method to determine the WBC of the whole pellet than weighing the pellet after centrifugation.

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