Document Detail


Seasonal variation in the Dutch bovine raw milk composition.
MedLine Citation:
PMID:  19762790     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In this study, we determined the detailed composition of and seasonal variation in Dutch dairy milk. Raw milk samples representative of the complete Dutch milk supply were collected weekly from February 2005 until February 2006. Large seasonal variation exists in the concentrations of the main components and milk fatty acid composition. Milk lactose concentration was rather constant throughout the season. Milk true protein content was somewhat more responsive to season, with the lowest content in June (3.21 g/100 g) and the highest content in December (3.38 g/100 g). Milk fat concentration increased from a minimum of 4.10 g/100 g in June to a maximum of 4.57 g/100 g in January. The largest (up to 2-fold) seasonal changes in the fatty acid composition were found for trans fatty acids, including conjugated linoleic acid. Milk protein composition was rather constant throughout the season. Milk unsaturation indices, which were used as an indication of desaturase activity, were lowest in spring and highest in autumn. Compared with a previous investigation of Dutch dairy milk in 1992, the fatty acid composition of Dutch raw milk has changed considerably, in particular with a higher content of saturated fatty acids in 2005 milk.
Authors:
J M L Heck; H J F van Valenberg; J Dijkstra; A C M van Hooijdonk
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of dairy science     Volume:  92     ISSN:  1525-3198     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  2009 Oct 
Date Detail:
Created Date:  2009-09-18     Completed Date:  2009-12-11     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2985126R     Medline TA:  J Dairy Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  4745-55     Citation Subset:  IM    
Affiliation:
Dairy Science and Technology Group, Wageningen University, 6700 EV Wageningen, the Netherlands. jeroen.heck@frieslandcampina.com
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MeSH Terms
Descriptor/Qualifier:
Animals
Cattle
Diet
Fats / analysis
Fatty Acids / analysis
Female
Lactose / analysis
Linoleic Acids, Conjugated / analysis
Milk / chemistry*
Milk Proteins / analysis
Netherlands
Seasons*
Trans Fatty Acids / analysis
Chemical
Reg. No./Substance:
0/Fats; 0/Fatty Acids; 0/Linoleic Acids, Conjugated; 0/Milk Proteins; 0/Trans Fatty Acids; 63-42-3/Lactose

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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