Document Detail


Simultaneous pasteurization and homogenization of human milk by combining heat and ultrasound: effect on milk quality.
MedLine Citation:
PMID:  20053316     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The combination of ultrasound and heat (thermoultrasound) is an emerging food preservation technique that retains higher quantities of bioactive components compared with current thermal pasteurization practice, but has not yet been assessed for pasteurizing human milk. Artificially contaminated human milk samples were treated with ultrasound (20 kHz, 150 watts) with and without heating. The retention of four human milk proteins was quantified by biochemical assay and laser scattering particle sizing was used to determine the extent of homogenization. While ultrasonic treatment was effective at inactivating Escherichia coli (D4 degrees C=5.94 min), Staphylococcus epidermidis exhibited resistance (D4 degrees C=16.01 min). Thermoultrasonic treatment was considerably more effective (Esch. coli D45 degrees C=1.74 min, D50 degrees C=0.89 min; Staph. epidermidis D45 degrees C=2.08 min, D50 degrees C=0.94 minutes) with a predicted retention (2.8 min treatment, 50 degrees C) of secretory IgA lysozyme, lactoferrin and bile salt stimulated lipase of 91, 80, 77, and 45%, respectively. Homogenization of the milk samples occurred after 5 min and 2 min of ultrasonic and thermoultrasonic treatment, respectively. Thermoultrasonic treatment is an effective method for pasteurizing donor human milk and retaining a greater proportion of bioactive components compared with current practices. However, further studies are required to assess the practicality of applying this technique routinely to donor human milk.
Authors:
Charles Czank; Karen Simmer; Peter E Hartmann
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-01-07
Journal Detail:
Title:  The Journal of dairy research     Volume:  77     ISSN:  1469-7629     ISO Abbreviation:  J. Dairy Res.     Publication Date:  2010 May 
Date Detail:
Created Date:  2010-04-12     Completed Date:  2010-07-20     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2985125R     Medline TA:  J Dairy Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  183-9     Citation Subset:  IM    
Affiliation:
Discipline of Biochemistry and Molecular Biology, School of Biomedical, Biomolecular and Chemical Science, The University of Western Australia, Crawley, Western Australia, 6009, Australia. czankc01@student.uwa.edu.au
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MeSH Terms
Descriptor/Qualifier:
Anti-Infective Agents / analysis
Disinfection / methods*
Escherichia coli / isolation & purification
Female
Food Handling / methods
Food Preservation / methods
Hot Temperature
Humans
Immunoglobulin A, Secretory / analysis
Lactoferrin / analysis
Lipase / analysis
Milk Proteins / analysis
Milk, Human* / chemistry,  microbiology
Muramidase / analysis
Nutritive Value
Particle Size
Sonication / methods*
Staphylococcus epidermidis / isolation & purification
Chemical
Reg. No./Substance:
0/Anti-Infective Agents; 0/Immunoglobulin A, Secretory; 0/Lactoferrin; 0/Milk Proteins; EC 3.1.1.3/Lipase; EC 3.2.1.17/Muramidase

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