Bovine colostrum: Postpartum changes in fat globule size distribution and fatty acid profile
Laen...
Kuupäev
2022
Kättesaadav alates
Autorid
Sats, Andres
Yurchenko, Sergei
Kaart, Tanel
Tatar, Vilma
Lutter, Liis
Jõudu, Ivi
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Elsevier
Abstrakt
Although “zero waste” valorization concepts are
gaining increasing attention, colostrum, a byproduct
of milk production, remains underused due to technological
challenges. Information about the fat fraction
and the size of fat globules is needed to address these
challenges, but such information is currently lacking.
This study aimed to fill this gap in the knowledge by
measuring the size distribution of bovine colostrum
fat globules (CFG) and analyzing its relationships
with postpartum milkings, parity, and fatty acids (FA)
profile. Four sequential postpartum colostrum samples
were collected from 44 cows and analyzed for the abovementioned
parameters. The results indicated that CFG
size increases almost twice during postpartum milkings
(from ~5 to ~10 μm), whereas lactation has little, if
any, effect on CFG size. The FA profile analyses showed
that the content of most FA in the fourth postpartum
milking was different from the previous milkings. The
correlation analyses between CFG size and FA profile
also demonstrated that the fourth milking was clearly
distinguishable from the first 3 postpartum milkings.
For example, the saturated FA content from the first 3
milkings had a positive correlation with smaller CFG
(and a negative correlation with larger CFG), whereas
the fourth milking demonstrated no correlations. Based
on these CFG size and FA profile analyses, the results
of this study suggest that the first 3 postpartum milkings
can be considered as colostrum, whereas the fourth
milking represents transition milk. Information about
CFG size distribution enables modification of the FA
profile of colostrum products and the ability to create
better valorization technologies for colostrum-based
food and feed supplements.
We are grateful to D. Arney (Estonian University of Life Sciences, Tartu) and K. Koorem (University of Tartu, Tartu) for comments on earlier versions of the manuscript. The publication of this work was supported by the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 810630 “ERA Chair for Food (By-) Products Valorization Technologies of the Estonian University of Life Sciences (VALORTECH)” and the Estonian University of Life Sciences research and development base financing (P170195VLTQ). The authors have not stated any conflicts of interest.
We are grateful to D. Arney (Estonian University of Life Sciences, Tartu) and K. Koorem (University of Tartu, Tartu) for comments on earlier versions of the manuscript. The publication of this work was supported by the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 810630 “ERA Chair for Food (By-) Products Valorization Technologies of the Estonian University of Life Sciences (VALORTECH)” and the Estonian University of Life Sciences research and development base financing (P170195VLTQ). The authors have not stated any conflicts of interest.
Kirjeldus
Märksõnad
colostrum, fat globule size, polyunsaturated fatty acid, transition milk, parity, articles