MATERIALS AND METHODS
Materials
The research was conducted at the dairy
farm "Mikhailivske", Mikhailivka village
(49°11ʼ52'' North latitude, 28°43ʼ29'' East
longitude) of Vinnitsa region with the cows of the
Ukrainian Black-Spotted (UBS) dairy breed and
crossbred cows of the first-generation obtained as
a result of crossing with Brown Swiss breed and
at the dairy farm "Azorel", village Mukhivka
(48°57ʼ01'' North latitude, 28°47ʼ09'' East
longitude) of Vinnitsa region with the cows of the
Ukrainian Red-Spotted (URS) dairy breed and
crossbred cows of the first-generation obtained
from crossing of the URS dairy breed with
Montbeliarde breed. In both farms there were two
groups of pure-breed and crossbred cows-
analogues. Ten cows were used in еаch group.
Methods
The accounting of milk productivity of the
experimental cows was carried out according to
daily and monthly yields. The amino acid
compositions of milk proteins and its mineral
composition was determined and assessed at the
State Research and Development Control Institute
of Veterinary Preparations and Feed Supplements
(Lviv) by the method of capillary electrophoresis
using the system of capillary electrophoresis
"Kapel 105/105M" (Ukraine). The system of
capillary electrophoresis "Kapel 105/105M" with
a positive polarity of a high voltage source
(internal diameter of the capillary is 75
micrometer, full length of the capillary is 60 cm,
effective length is 50 cm), equipped with special
software based on a personal computer.
The method for determining of amino acid in
milk was based on the spreading of tests by acid
hydrolysis with their transition into free forms of
phenylthiocarbamil derivatives (PTC derivatives),
their further separation and quantitative
Amino Acid Mineral of Milk from Ukranian Cows (A. A. Borshch et al.)
239
determination by the method of capillary
electrophoresis. The determination of amino acid
content was used the standard set LAA-21 (USA).
The detection was carried out in the UV area of
the spectrum at the wavelength of 254 nm.
Determination of macro elements in milk was
based on acid hydrolysis of samples, further
separation, and quantitative determination of
cations by capillary electrophoresis method. The
components were detected by indirect absorption
at the wavelength of 267 nm. For analysis of the
amino acid and mineral composition, milk
samples from each of the experimental cows were
cooled to the temperature 6±2ºС.
The obtained data were statistically
processed using STATISTICA (Version 11.0,
2012) software. The student’s t-test was used to
estimate the statistical significance of the obtained
values. Data were considered significant at level
of 5, 1 and 0.1% (Sokal and Rohlf, 1995).
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