Rheology and microstructure characterisation of small intestinal digesta from pigs fed a red meat-containing Western-style diet

Shelat, Kinnari J., Nicholson, Timothy, Flanagan, Barnadine M., Zhang, Dagong, Williams, Barbara A. and Gidley, Michael J. (2014) Rheology and microstructure characterisation of small intestinal digesta from pigs fed a red meat-containing Western-style diet. Food Hydrocolloids, 44 300-308. doi:10.1016/j.foodhyd.2014.09.036


Author Shelat, Kinnari J.
Nicholson, Timothy
Flanagan, Barnadine M.
Zhang, Dagong
Williams, Barbara A.
Gidley, Michael J.
Title Rheology and microstructure characterisation of small intestinal digesta from pigs fed a red meat-containing Western-style diet
Journal name Food Hydrocolloids   Check publisher's open access policy
ISSN 0268-005X
1873-7137
Publication date 2014-10-07
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.foodhyd.2014.09.036
Open Access Status
Volume 44
Start page 300
End page 308
Total pages 9
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2015
Language eng
Formatted abstract
A method to characterise rheological and microstructure features of whole digesta collected from pigs fed meat-containing western style diets is described. Digesta are shown to contain suspensions of meat fibre particles up to 300 μm in size which exhibit weak gel behaviour, have a dynamic viscosity higher than steady shear viscosity indicative of structural breakdown at the initiation of flow, and shear thinning behaviour under steady shear. The power law index approach is useful for capturing the overall features of rheological behaviour under both small (n*<0.3) and large deformation (typically 0.2 < n < 0.5) conditions. Values obtained for rheological parameters represent a balance between the digestion of structural components (meat particles and starch granules in this case) with the absorption of water along the small intestine, and result in the absence of any systematic pattern as a function of small intestinal site. Both primary rheological data (G′, G″, η, η*) and power law index parameters show a high level of variability between animals fed identical diets. This study provides a baseline from which to investigate the in vivo effects of hydrocolloids on the rheology of porcine digesta from diets representative of human meals.
Keyword Rheology of digesta
Physical properties of digesta
Viscoelastic characteristics of digesta
Microstructure of digesta
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online ahead of print 7 October 2014.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2015 Collection
Centre for Nutrition and Food Sciences Publications
 
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