Document Detail

Efficacy of a novel whey protein gel complex to increase the unsaturated fatty acid composition of bovine milk fat.
MedLine Citation:
PMID:  16428634     Owner:  NLM     Status:  MEDLINE    
A novel whey protein emulsion gel (WPEG) complex was developed to protect dietary unsaturated fatty acids from rumen biohydrogenation with the goal of modifying the fatty acid composition of milk fat. Three experiments were conducted with WPEG complexes made from either whey protein concentrate containing 80% crude protein, whey protein isolate, or whey protein concentrate high-gel capacity. Each experiment lasted 3 wk. All cows received a basal total mixed ration (TMR). During wk 1 and 3, all cows received only the TMR. During wk 2, 3 control cows received 330 g/d of soybean oil added to the TMR, and the other 3 cows received 330 g/d of soybean oil in one of the WPEG complexes. During wk 2, C18:2 increased from 3.29 to 5.88 g/100 g of fat in Experiment 1, 2.91 to 7.42 g/100 g of fat in Experiment 2, and 3.57 to 6.56 g/100 g of fat in Experiment 3 for WPEG cows. Fatty acid C18:3 increased from 0.51 to 0.84, 0.52 to 1.15, and 0.51 to 0.97 g/100 g of fat for Experiments 1, 2, and 3, respectively, for WPEG cows. Higher proportions of C18:1 trans-9 in milk fat of control cows compared with WPEG cows were seen in all experiments. The proportion of C18:1 trans-11 was also higher in control cows in Experiments 1 and 2, but not in Experiment 3. The WPEG complexes successfully protected unsaturated fatty acids from rumen biohydrogenation and resulted in an increase in the unsaturated fatty acid composition of milk fat produced by Holstein cows without increasing the trans 18-carbon monoenes.
S M Carroll; E J DePeters; M Rosenberg
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of dairy science     Volume:  89     ISSN:  1525-3198     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  2006 Feb 
Date Detail:
Created Date:  2006-01-23     Completed Date:  2006-05-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2985126R     Medline TA:  J Dairy Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  640-50     Citation Subset:  IM    
Department of Animal Science, University of California, Davis 95616, USA
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MeSH Terms
Cattle / metabolism*
Dietary Fats, Unsaturated / administration & dosage,  metabolism*
Emulsions / administration & dosage,  chemistry
Fats / chemistry
Fatty Acids / analysis,  blood
Fatty Acids, Unsaturated / analysis*
Gels / administration & dosage*,  chemistry
Maillard Reaction
Milk / chemistry*
Milk Proteins / administration & dosage*,  chemistry
Rumen / metabolism
Soybean Oil / administration & dosage,  chemistry
Reg. No./Substance:
0/Dietary Fats, Unsaturated; 0/Emulsions; 0/Fats; 0/Fatty Acids; 0/Fatty Acids, Unsaturated; 0/Gels; 0/Milk Proteins; 0/whey protein; 8001-22-7/Soybean Oil

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