Seasonal variation in fatty acid and triacylglycerol composition of bovine milk fat
نویسندگان
چکیده
The aim of this study was to assess the effects seasonal variation on changes fatty acid (FA) and triacylglycerol (TAG) composition bovine milk fat (MF) in a nonseasonal milking system. Weekly samples were collected from 14 dairy factories pooled per week as representative average Dutch milk. sample collection started May 2017 finished April 2018, resulting total 52 samples, corresponding each year. analyzed for MF content (%) FA TAG using gas chromatography with flame-ionization detection. increased intake C18:3 cis-9,12,15 through grass feeding spring summer associated major composition, including reduced proportions de novo synthesized presence several rumen biohydrogenation products conjugated linoleic isomers MF. These had an effect variation. showed that all groups significantly different between months. low molecular weight medium winter decreased summer, whereas high winter. Based monthly MALDI-TOF-mass spectrometry allowed analysis even- odd-chain species based their carbon number double bonds. analyses indicated saturated be greatest winter, monounsaturated, polyunsaturated, summer. Our system is influenced by throughout seasons.
منابع مشابه
Seasonal Variation of Triacylglycerol Profile of Bovine Milk
Milk contains 3-6% of fat, of which the dominant component is triacylglycerol (TAG). Over 100 TAG groups can be readily detected in any non-enriched milk sample by LC-MS; most TAG groups contain several isomers (TAG molecules with different fatty acid composition), which cannot be fully resolved chromatographically by any single stationary phase. TAG profile of mature milk from 19 cows was surv...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 2021
ISSN: ['0022-0302', '1525-3198', '1529-9066']
DOI: https://doi.org/10.3168/jds.2020-19856