title: [The effect of artificial ultraviolet light on biochemical indicators in calves].
abstract: Changes in the biochemical parameters of the blood serum of calves were studied after exposure to optimum doses of ultraviolet radiation. The calves were exposed to UV-light twice daily in three periods: 8, 9 and 10 days. Daily doses of 90, 130 and 180 mEr.h.m-2 were used in the first experiment, 120, 180 and 240 mEr.h.m-2 in the second experiment. As found, exposure to radiation in the individual periods increased total proteinaemia, the differences between the experimental and control groups being significant. Exposure to ultraviolet light induced an increase in the activity of the thyroid gland; at the end of the periods of UV-radiation the concentration of thyroxine in the experimental groups was significantly or highly significantly higher. The largest differences were recorded in the first trial (15 nmol per litre to 21.4 nmol per litre). No changes were detected by the evaluation of the activities of alkaline phosphatase, triiodothyronine, sodium, potassium and calcium and in the sodium: potassium ratio.
mesh_terms: D000469:Alkaline Phosphatase / Q000097:blood / Q000528:radiation effects; D000818:Animals; D001798:Blood Proteins / Q000378:metabolism / Q000528:radiation effects; D002417:Cattle / Q000097:blood*; D011188:Potassium / Q000097:blood; D012964:Sodium / Q000097:blood; D013963:Thyroid Hormones / Q000097:blood / Q000528:radiation effects; D014466:Ultraviolet Rays
chemical_list: D001798:Blood Proteins; D013963:Thyroid Hormones; D012964:Sodium; D000469:Alkaline Phosphatase; D011188:Potassium
vernacular_title: Vplyv umelého ultrafialového svetla na biochemické ukazovatele teliat.