Archivum veterinarium Polonicum最新文献

The studies were aimed at determining the udder skin temperature and heat flux from its surface 30 min before and 20 min after milking. It was carried out on 8 cows in 3-4 week of lactation, kept in a tying stall. After milking the udder skin temperature increased (0.93 degree C on the lobes and 0.76 degree C on the teats), whereas the heat flux depended on where it was measured. After milking the mammary gland became more sensitive to microclimatic conditions compared with the condition before milking, which was manifest in the increasing correlation coefficient r. The correlation pertained more to the skin temperature of the mammary gland than to the heat flux from its surface.

Ischaemic injury was produced in the dog heart by occluding the left anterior descending coronary artery just below the second diagonal branch for the duration of 3 h. Nifedipine 5.0 mg/kg and Verapamil 5.0 mg/kg were injected intravenously 10 min before the occlusion. Sarcolemmal membrane vesicles were prepared from an ischaemic and non-ischaemic hearts. Without treatment with Nifedipine or Verapamil the total amount of sarcolemmal phospholipid obtained from ischaemic hearts, as well as the amounts of phosphatidylcholine and phosphatidylethanolamine were significantly decreased as compared with those from non-ischaemic hearts. Calcium channel blocker pretreatment abolished the decrease in the total amount of sarcolemmal phospholipids, as well as phosphatidylcholine and phosphatidylethanolamine content induced by ischaemia. Thus, our work indicates that Nifedipine and Verapamil, suppressed the ischaemia-induced increase in phospholipid breakdown of cardiac sarcolemma.

The effect of lactoferrin (LF) on in vitro and in vivo phagocytic ability of bovine blood monocytes was studied. It was demonstrated that bovine LF enhanced in vitro phagocytosis of bacteria and ovine erythrocyte-antibody complexes and increased intracellular killing of Staphylococcus albus. Monocytes of colostrum deprived calves, which were intravenously injected with LF, also exhibited elevated phagocytic properties.

The influence of bipolar Teflon-platinum electrode implantation onto the antral, small intestinal and gall-bladder muscular tunic on the myoelectric activity was studied in 5 adult rams for the period up to 3 months. Histological examinations of the muscular tissue surrounding the electrodes were also performed. The electromyographical recordings were done 4 times at the 3-4 week intervals. No marked differences in the character and the amplitude of the consecutive recordings were detected. The histological image of the muscular tissue was normal. Thus, the use of these electrodes guarantees the correctness of the electromyographical recordings obtained even from the gastrointestinal segments possessing very thin muscular layer.

110 brains of the N. American mink were studied for the arteries of the base of the brain, using the anatomical method and Digital Imaging Analysis. Two arterial circles were isolated: the larger cerebral circle (CC) and the smaller medullar circle (MC). These were connected by the basal artery of the brain. We found that in CC, its left part was larger, whereas in MC, it was the right part that was larger. Also, the capacity was larger in the caudal part of MC than in its rostral part.

After dexamethasone treatment, a significant decrease in the monoenoic phosphatidylcholine 32 carbon species (palmitoyl-palmitoleylphosphatidylcholine and palmitoleyl-palmitoylphosphatidylcholine) and the phosphatidylcholine 34 carbon species (primarily palmitoyl-oleoylphosphatidylcholine) could be demonstrated both in absolute and relative terms, while the palmitic acid portion in the phosphatidylcholine fatty acids was nearly unchanged. This is in agreement with a significant reduction of the quantity of palmitoleic and oleic acids in the total phosphatidylcholine fatty acids.

The experiment was carried out on a group of 300 piglets. During experiment the effect of supplementation with peat preparation coming from different charges on productivity, selected productive and biochemical indices was examined. All these indices were compared with a negative and positive control. A positive effect of supplementation with peat preparation in amount of 300 mg/kg of mixture on body weight increase and physiological and biochemical indices was found. The examined peat preparation coming from different charges demonstrated different effect which shows that it was not an entirely homogeneous material.

The studies were carried out on 30 calves from the 4th to the 25th day of life, divided in three groups; control, glucose and casein. The glucose group was fed a diet containing 25% more glucose than the control. The increased dietary glucose supply decreased cortisol concentration in blood serum. The casein group was fed a diet containing 25% more protein-casein-than the control. The increased dietary casein supply increased the blood serum cortisol concentration. The changes discussed were observed not only during the period of diet application, but also a few days following the termination of the diet.

Ischaemic injury was produced in the dog heart by occluding the left anterior descending coronary artery just below the second diagonal branch for the duration of 3 h. A prostacyclin analogue, ZK 36374 (Iloprost) was administered (10 micrograms/kg) just before the coronary artery occlusion. During 3 h occlusion ATP levels in the ischaemic area declined from 65.4 +/- 7.1 mM/g protein in sham-operated group to 31.5 +/- 5.2 microM/g protein in no-drug group and to 44.1 +/- 5.0 microM/g protein in Iloprost group. Creatine phosphate decreased from 112 +/- 14 microM/g protein, to 81 +/- 10 microM/g protein in no-drug group and to 95 +/- 12 microM/g protein in Iloprost group. The energy charge (ATP + 0.5 ADP/ATP + ADP + AMP) decreased slightly but not significantly in no-drug and Iloprost group. Three hours of LAD occlusion produced a significant fall in SOD activity in the ischaemic heart in comparison to the non-ischaemic and Iloprost-treated hearts.

Rats poisoned with cadmium acetate during 12 weeks, at a dose of 50 mg/dm3 given in drinking water, were treated with oxygen-ozone mixture as intraperitoneal injection during the last 10 days of the experiment, at a daily dose of 1 cm3 and ozone concentration 40 micrograms/cm3. The mixture was made of medical oxygen with a Bioozon U type apparatus produced by B. Prochazka GmbH, Germany, Reutlingen. Control groups included animals treated with the above mixture with no cadmium, and rats poisoned with cadmium, with no oxygen-ozone treatment. Liver and cardiac muscle were examined in TEM Philips EM 301. Morphological traits of a protective of the mixture against cadmium-poisoning were observed in both those organs. This was expressed as weaker destructive changes within the endoplasmic reticulum, basal cytoplasm and lysosome of the hepatocytes, and additionally as a stabilization of contractile apparatus fibres in the heart myocytes.