[Changes in the vitamin D content in cow's milk irradiated in vitro with ultraviolet rays and in the blood serum of calves fed the irradiated milk].
Comparative investigations aiming to determine the most favourable dose for in vitro ultraviolet irradiation of cow milk which can ensure highest vitamin D content in it and best effect on vitamin D level in calf blood serum were carried out. It was established that under the applied technique of ultraviolet irradiation a 4 min treatment is most suitable and vitamin D content in milk rises several times (up to 8 times). Feeding of calves up to the age of 60 days with irradiated milk ensures a 4- to 5-fold increase of vitamin D in the blood serum as compared to its initial level before the experiment started and 2--3 fold as compared to that in control group calves.
D000818:Animals; D002417:Cattle / Q000097:blood*; D004307:Dose-Response Relationship, Radiation; D066298:In Vitro Techniques; D008892:Milk / Q000528:radiation effects*; D014466:Ultraviolet Rays; D014807:Vitamin D / Q000032:analysis / Q000528:radiation effects*
D014807:Vitamin D
Promeni v sudurzhanieto na vitamin D v krave mliako, oblucheno in vitro s ultravioletovi luchi, i v kruvniia serum na teleta, khraneni s oblucheno mliako.