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Bovine colostrum casein: Post-partum dynamics of micelle size, content, and associated traits




Kättesaadav alates


Sats, Andres
Kaart, Tanel
Jõudu, Ivi

Ajakirja pealkiri

Ajakirja ISSN

Köite pealkiri




In milk, casein exists in the form of colloidal casein micelles (CM), which are crucial for various biological functions such as neonatal nutrition, calcium phosphate control, and amyloid fibril suppression. However, bovine colostrum casein has received less attention despite its importance. The objective of this study was to investigate the size of colostrum CM and their relationship with compositional traits during four post-partum milkings. A total of 184 samples (collected at 12 ± 1 h intervals) were obtained from 46 cows over four sequential milkings. The results demonstrated a significant decrease in CM size of colostrum from 227.2 nm to 201.9 nm over the four post-partum milkings. Fat, protein, casein content, and Brix values also declined across milkings and showed a positive correlation with CM size, although the relationships were nonlinear. Understanding CM size can be valuable for decision-making regarding colostrum and transition milk processing due to its significant role.
We are grateful to K. Koorem (University of Tartu, Tartu) and D. Arney (Estonian University of Life Sciences, 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 Valorisation Technologies of the Estonian University of Life Sciences (VALORTECH)” and the Estonian University of Life Sciences research and development base financing (P170195VLTQ).



bovine, colostrum, postpartum, articles