[Use of selected parameters in the serum and blood of calves in the evaluation of nitrogen and energy metabolism].

Concentrations of total proteins, albumin, total serum immunoglobulins, urea and total lipids in the blood serum and glucose concentrations in the blood were investigated in the periods of milk nutrition and weaning, and the results were evaluated with respect to their differences from the range of reference values. Concentrations of total proteins (TP) in the blood serum significantly decreased if the starting values at the age of two weeks (65, 45 g/l) were compared with the values at the age of five weeks, and they began to increase to the age of 11 weeks. The average TP values at the age of 11 weeks were significantly higher (p < 0.

[Mineral metabolism in calves during periods of milk feeding and weaning based on selected parameters in the blood].

Concentrations of calcium, inorganic phosphorus, magnesium, sodium and potassium (Tab. I) were followed in the blood serum of calves in the period of milk diet and weaning (at the age of nine weeks), and the results were evaluated with respect to their deviations from the reference values. The average concentrations of calcium and inorganic phosphorus did not show any significant variations and they were within the range of reference values.

[The recovery and rearing of gnotobiotic lambs and their use in veterinary medicine].

Our own innovated method of the hysterectomy recovery of gnotobiotic lambs, modified equipment for gnotobiote rearing, management and tending techniques were tested in this study. A hysterectomy hood (Fig. 1) was made from plexiglass and it fully met the requirements for simple and rapid handling.