The relationship between antioxidant activity and the component composition of milk of black-and-white cows in the winter-stall period
Authors:   Junior Researcher, Department of Physiology and Biochemistry of Farm Animals of the L. K. Ernst Federal Research Center for Animal Husbandry, Dubrovitsy, Russian Federation, Savina A. A. , Voronina O. A. ,   Candidate of Sciences in Biology, Veterinarian, Senior Researcher of the Department of Physiology and Biochemistry of Agricultural Animals of the L. K. Ernst Federal Research Center for Animal Husbandry, Dubrovitsy, Russian Federation, Ignatieva L. P. ,   Candidate of Agricultural Sciences, Leading Researcher of the Department of Population Genetics and the Genetic Basis of Animal Breeding of the L. K. Ernst Federal Research Center for Animal Husbandry, Dubrovitsy, Russian Federation, Bogolyubova N. V. ,   Candidate of Biological Sciences, Head of the Department of Physiology and Biochemistry of Farm Animals of the L. K. Ernst Federal Research Center for Animal Husbandry, Dubrovitsy, Russian Federation, Zaytsev S. Yu. ,   Doctor of Biological Sciences, Doctor of Chemistry, Professor, Leading Researcher at the Department of Physiology and Biochemistry of Farm Animals of the L. K. Ernst Federal Research Center for Animal Husbandry, Dubrovitsy, Russian Federation
Published: June 2021

The aim of the work was to study the component composition of milk of black-and-white cows in the winter-stall period and its main biochemical parameters. In this work, the total amount of water-soluble antioxidants (TAWSA) was assessed by the amperometric method (using "TsvetYauza 01-AA" device) and the average values of the milk component composition for four groups of cows, which were formed by the number of somatic cells (NSC) found in their milk. Milk of mastitis cows causes food poisoning that is why 1 groups were formed according to the NSC values: 200) less than 2 thousand units/ml, 200) from 499 to 3 thousand units/ml, 500) from 999 to 4 thousand units/ml and 1000) more than XNUMX thousand units/ml for milk samples of black-and-white cows of the Moscow region, which was used as raw material. The TAWSA values for 33 milk samples from cows in group 1 ranged from 6,80 to 27,91 mg/g (mean value 15,95±3,70 mg/g). The correlations between TAWSA and the following parameters of milk: mass fraction of fat (MFF) – 0,305; protein mass fraction true (PMF1) and total (PMF2) – 0,197 and 0,210; lactose – 0,156; dry fat-free milk residue (FFMR) – 0,276; total dry matter (TDM) – 0,399; freezing point (FP) – 0,112; pH – 0,114; the number of somatic cells (NSC) – (–0,052) are found. The TAWSA values for 15 milk samples from cows in group 2 ranged from 10,46 to 18,99 mg/g (average value 14,45±3,50 mg/g) are found. The correlations between TAWSA and the following parameters of milk: MFF – 0,332; PMF1 and PMF2 – 0,296 and 0,303; lactose – (–0,308); FFMR – 0,159; TDM – 0,391; FP – 0,226; pH – (–0,211); NSC – 0,193. The TAWSA values for 13 milk samples of cows in group 3 ranged from 10,46 to 18,99 mg/g (average value 16,04±3,60 mg/g) are found. The correlations between TAWSA and the following parameters of milk: MFF – (–0,352); PMF1 and PMF2 – (– 0,411) and (–0,401); lactose – (–0,166); FFMR – (–0,462); TDM – (–0,504); FP – (–0,766); pH – (–0,047); NSC – (–0,698). The TAWSA values for 12 milk samples from cows in group 4 ranged from 5,80 mg/g to 20,30 mg/g (average value 14,58±3,50 mg/g) are found. The correlations between TAWSA and the following parameters of milk: MFF – 0,159; PMF1 and PMF2 – 0,046 and 0,077; lactose – (–0,317); FFMR – (–0,237); TDM – 0,058; FP – (–0,036); pH – (–0,477); NSC – (–0,072) are found. These data obtained are of great importance both in assessing the physiological-biochemical status and the state of the antioxidant defense system of the cows' organism.