| Phase and rheological behavior of high-concentration colloidal hard-sphere and protein dispersions. | |
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MedLine Citation:
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PMID: 17995655 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Colloidal hard-sphere (HS) particles of narrow-size distribution exhibit crystalline and glassy states beginning at the particle volume fractions phi = 0.494 and phi(G) = 0.58, respectively. Dynamic rheological data on the dispersions were strongly modified to solid-like behavior as phi approached phi(G). In addition, cooperative motion in structural relaxation has been observed microscopically in the colloidal dispersions near the glassy state. Very high viscosities and glassy states were also found in high-concentration dispersions of sodium caseinate and the globular proteins: bovine serum albumin and beta-lactoglobulin. Viscosity models developed for HS dispersions predicted accurately the trends but not the absolute values of protein dispersions. Dispersions of food colloidal particles may be employed in studies, in which volume fraction is the thermodynamic variable, for understanding the relaxation and transport processes related to 1st-order and colloidal glass transitions. |
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Authors:
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S M Loveday; L K Creamer; H Singh; M A Rao |
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Publication Detail:
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Type: Journal Article; Review |
Journal Detail:
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Title: Journal of food science Volume: 72 ISSN: 1750-3841 ISO Abbreviation: J. Food Sci. Publication Date: 2007 Sep |
Date Detail:
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Created Date: 2007-11-12 Completed Date: 2008-01-25 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0014052 Medline TA: J Food Sci Country: United States |
Other Details:
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Languages: eng Pagination: R101-7 Citation Subset: IM |
Affiliation:
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The Riddet Centre, Massey Univ., Private Bag 11222, Palmerston North, New Zealand. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Colloids
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chemistry* Food Technology* Models, Chemical* Particle Size Phase Transition Protein Conformation Rheology* Structure-Activity Relationship Surface Properties |
| Chemical | |
Reg. No./Substance:
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0/Colloids |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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