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The aim of this study was to compare the pharmacokinetics of paracetamol in calves of the BW (Black- -and-White) breed and cross-breed calves (BW × HF Holstein-Friesian) (50% HF). The effect of age on interbreed differences in the values of selected pharmacokinetic parameters of this model drug were also examined. The experiment was carried out on 20 healthy calves: 10 of BW breed and 10 cross-breed...
The aim of the study was to determine the freezing point variability of udder milk samples from Black & White cows depending on their genotype, age, daily milk yield and lactation stage. The freezing point and chemical composition of 63800 udder milk samples collected from 12437 cows were determined using CombiFoss 5000 apparatus. The freezing point of milk from cows with a high HF breed genes...
The investigations were carried out on seventy five bulls of Black and White Breed and forty six bulls of Red and White Breed used for procreation in the years 1977-1985 in the Animal Breeding and Insemination Centre in Karczów. All ejaculates produced by individual bulls during the first three years were examined. There were 33103 ejaculate features of both bull breeds analysed. The following features...
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