Aggregation of rennet-altered casein micelles at low temperatures

Bansal, Nidhi, Fox, Patrick F. and McSweeney, Paul L. H. (2007) Aggregation of rennet-altered casein micelles at low temperatures. Journal of Agricultural and Food Chemistry, 55 8: 3120-3126. doi:10.1021/jf0631427


Author Bansal, Nidhi
Fox, Patrick F.
McSweeney, Paul L. H.
Title Aggregation of rennet-altered casein micelles at low temperatures
Journal name Journal of Agricultural and Food Chemistry   Check publisher's open access policy
ISSN 0021-8561
1520-5118
Publication date 2007-04-01
Year available 2007
Sub-type Article (original research)
DOI 10.1021/jf0631427
Open Access Status Not yet assessed
Volume 55
Issue 8
Start page 3120
End page 3126
Total pages 7
Place of publication Washington, DC United States
Publisher American Chemical Society
Language eng
Abstract The rennet-induced coagulation of bovine milk at 10 degrees C was investigated. The rate of change of absorbance at 600 nm was higher in milk renneted at 30 degrees C than that at 10 degrees C. The amount of casein sedimented on centrifuging skim milk at 5000g for 1 h at 10 degrees C increased with time after renneting. The viscosity of milk at 10 degrees C at low shear rates did not change significantly until 10 h after rennet addition, but it increased markedly after 20 h. Smaller particles in milk at 10 degrees C disappeared slowly over 36 h after rennet addition and aggregated into larger particles. These results suggested that casein micelles in milk aggregate at low temperatures. Reasons for the slow aggregation of milk renneted at 10 degrees C were investigated by inhibiting chymosin activity by pepstatin A. It is likely that beta-casein, or its hydrolysis, plays a role in aggregation of rennet-altered casein micelles at low temperatures.
Keyword Agriculture, Multidisciplinary
Chemistry, Applied
Food Science & Technology
Agriculture
Chemistry
Food Science & Technology
AGRICULTURE, MULTIDISCIPLINARY
CHEMISTRY, APPLIED
FOOD SCIENCE & TECHNOLOGY
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Agriculture and Food Sciences
 
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Created: Tue, 21 Jan 2014, 02:04:29 EST by Nidhi Bansal on behalf of School of Agriculture and Food Sciences