Seasonal variation of polar lipid content in bovine milk.

Autor: Liu Z; Biosciences Research, Agriculture Victoria, AgriBio, 5 Ring Road, Bundoora, Victoria 3083, Australia. Electronic address: Zhiqian.liu@ecodev.vic.gov.au., Logan A; CSIRO Agriculture and Food, Werribee, Victoria 3030, Australia., Cocks BG; Biosciences Research, Agriculture Victoria, AgriBio, 5 Ring Road, Bundoora, Victoria 3083, Australia; School of Applied Systems Biology, La Trobe University, Bundoora, Victoria 3083, Australia., Rochfort S; Biosciences Research, Agriculture Victoria, AgriBio, 5 Ring Road, Bundoora, Victoria 3083, Australia; School of Applied Systems Biology, La Trobe University, Bundoora, Victoria 3083, Australia.
Jazyk: angličtina
Zdroj: Food chemistry [Food Chem] 2017 Dec 15; Vol. 237, pp. 865-869. Date of Electronic Publication: 2017 Jun 08.
DOI: 10.1016/j.foodchem.2017.06.038
Abstrakt: Seasonal change of milk composition could offer opportunities for dairy manufacturers. A systematic survey on seasonal variation of six classes of polar lipids was conducted with 19 Holstein cows over the entire milking season using liquid chromatography-mass spectrometry technique. This study revealed that most polar lipid classes were positively correlated with the total fat content, but negatively correlated with fat globule size. All polar lipid classes displayed a large cow-to-cow variation as well as seasonal variation. All of the six classes showed a gradual increase over the milking season with the highest concentration observed in May (autumn). However, the proportion of different polar lipid classes remained constant during the entire milking season. This finding suggests that the production of polar lipids is highly regulated in the mammary gland. The implication of such a seasonal variation of polar lipids in the nutritional and technological aspects of milk is discussed.
(Copyright © 2017 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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