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 507468
Title Water-binding of protein particles
Author(s) Peters, J.P.C.M.
Source Wageningen University. Promotor(en): Atze Jan van der Goot; Remko Boom. - Wageningen : Wageningen University - ISBN 9789462578623 - 198 p.
Department(s) Food Process Engineering
VLAG
Publication type Dissertation, internally prepared
Publication year 2016
Keyword(s) whey protein - proteins - particles - water binding capacity - water - nuclear magnetic resonance - wei-eiwit - eiwitten - deeltjes - waterbindend vermogen - kernmagnetische resonantie
Categories Food and Bioprocess Engineering (General)
Abstract

As overweight and obesity become more prevalent in society, the demand for food products that can help maintain body weight increases. One way to make such products is by decreasing the protein and fat content through increasing the water content. This thesis describes the potential of protein microparticles (MPs) to bind ≥ 90% w/w water tightly without negatively influencing sensory perception. Therefore, two types of MPs were prepared: heat- and cold-gelated MPs. In addition, pea protein isolate, soy protein isolate, lupin protein concentrate and vital wheat gluten particles were used. To determine their water-binding capacity (WBC), pellets were made by centrifuging dispersions of those particles. These measurements showed that some of these pellets can bind ≥ 90% w/w water. However, the WBC of a pellet contains both water bound within and between the particles, which means that the WBC of a pellet is always unequal to the WBC of the protein particles themselves. To gain more insight in these two water domains and the pellet as a whole, a combination of time domain nuclear magnetic resonance and microscopy was found to be useful. From the measurements, it was concluded that the WBC of a pellet is determined by the structure of protein particles (nanostructure) as well as the structure between particles (microstructure). Overall, the WBC of pellets being larger than that of particles themselves suggests that pellets are a good alternative to the use of MPs for the purpose of increasing the water content of a product, provided they remain a network in the product.

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